/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/in-de52.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 02:51:56,240 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 02:51:56,242 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 02:51:56,298 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 02:51:56,347 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf [2022-01-10 02:51:56,385 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 02:51:56,386 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 02:51:56,386 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 02:51:56,386 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 02:51:56,387 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 02:51:56,387 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 02:51:56,387 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 02:51:56,387 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 02:51:56,388 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 02:51:56,388 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 02:51:56,388 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 02:51:56,389 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 02:51:56,389 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 02:51:56,389 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 02:51:56,389 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 02:51:56,389 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 02:51:56,389 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 02:51:56,389 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 02:51:56,389 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 02:51:56,390 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 02:51:56,390 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 02:51:56,390 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 02:51:56,390 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 02:51:56,390 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 02:51:56,390 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 02:51:56,390 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 02:51:56,390 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 02:51:56,391 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 02:51:56,391 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 02:51:56,391 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 02:51:56,391 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 02:51:56,391 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 02:51:56,391 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 02:51:56,391 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 02:51:56,608 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 02:51:56,628 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 02:51:56,630 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 02:51:56,630 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 02:51:56,635 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 02:51:56,636 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/in-de52.c [2022-01-10 02:51:56,691 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/249ef73a0/d8731ca6846148518332bcf71d712676/FLAG05842ad89 [2022-01-10 02:51:57,058 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 02:51:57,059 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de52.c [2022-01-10 02:51:57,063 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/249ef73a0/d8731ca6846148518332bcf71d712676/FLAG05842ad89 [2022-01-10 02:51:57,073 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/249ef73a0/d8731ca6846148518332bcf71d712676 [2022-01-10 02:51:57,074 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 02:51:57,075 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 02:51:57,079 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 02:51:57,079 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 02:51:57,081 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 02:51:57,082 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 02:51:57" (1/1) ... [2022-01-10 02:51:57,082 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7799aeca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:51:57, skipping insertion in model container [2022-01-10 02:51:57,083 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 02:51:57" (1/1) ... [2022-01-10 02:51:57,091 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 02:51:57,101 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 02:51:57,195 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de52.c[368,381] [2022-01-10 02:51:57,219 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 02:51:57,227 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 02:51:57,237 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de52.c[368,381] [2022-01-10 02:51:57,241 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 02:51:57,251 INFO L208 MainTranslator]: Completed translation [2022-01-10 02:51:57,252 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:51:57 WrapperNode [2022-01-10 02:51:57,252 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 02:51:57,253 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 02:51:57,253 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 02:51:57,253 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 02:51:57,259 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:51:57" (1/1) ... [2022-01-10 02:51:57,265 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:51:57" (1/1) ... [2022-01-10 02:51:57,282 INFO L137 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 75 [2022-01-10 02:51:57,282 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 02:51:57,283 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 02:51:57,283 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 02:51:57,283 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 02:51:57,289 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:51:57" (1/1) ... [2022-01-10 02:51:57,289 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:51:57" (1/1) ... [2022-01-10 02:51:57,291 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:51:57" (1/1) ... [2022-01-10 02:51:57,291 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:51:57" (1/1) ... [2022-01-10 02:51:57,299 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:51:57" (1/1) ... [2022-01-10 02:51:57,302 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:51:57" (1/1) ... [2022-01-10 02:51:57,303 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:51:57" (1/1) ... [2022-01-10 02:51:57,304 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 02:51:57,305 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 02:51:57,305 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 02:51:57,305 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 02:51:57,308 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:51:57" (1/1) ... [2022-01-10 02:51:57,314 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 02:51:57,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 02:51:57,334 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-10 02:51:57,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-10 02:51:57,371 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 02:51:57,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 02:51:57,371 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 02:51:57,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 02:51:57,427 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 02:51:57,429 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 02:51:57,539 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 02:51:57,543 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 02:51:57,543 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-01-10 02:51:57,545 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:51:57 BoogieIcfgContainer [2022-01-10 02:51:57,545 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 02:51:57,546 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 02:51:57,546 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 02:51:57,549 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 02:51:57,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 02:51:57" (1/3) ... [2022-01-10 02:51:57,550 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34900cc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 02:51:57, skipping insertion in model container [2022-01-10 02:51:57,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:51:57" (2/3) ... [2022-01-10 02:51:57,550 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34900cc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 02:51:57, skipping insertion in model container [2022-01-10 02:51:57,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:51:57" (3/3) ... [2022-01-10 02:51:57,551 INFO L111 eAbstractionObserver]: Analyzing ICFG in-de52.c [2022-01-10 02:51:57,555 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 02:51:57,555 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 02:51:57,589 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 02:51:57,595 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-10 02:51:57,595 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 02:51:57,605 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 15 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) [2022-01-10 02:51:57,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-10 02:51:57,609 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:51:57,610 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:51:57,610 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:51:57,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:51:57,618 INFO L85 PathProgramCache]: Analyzing trace with hash 62220644, now seen corresponding path program 1 times [2022-01-10 02:51:57,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:51:57,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1906456766] [2022-01-10 02:51:57,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:51:57,629 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:51:57,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:51:57,637 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:51:57,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-01-10 02:51:57,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:51:57,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-10 02:51:57,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:51:57,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:51:57,748 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:51:57,748 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:51:57,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1906456766] [2022-01-10 02:51:57,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1906456766] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:51:57,749 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:51:57,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 02:51:57,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334030640] [2022-01-10 02:51:57,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:51:57,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 02:51:57,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:51:57,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 02:51:57,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 02:51:57,824 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 15 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) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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) [2022-01-10 02:51:57,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:51:57,836 INFO L93 Difference]: Finished difference Result 29 states and 47 transitions. [2022-01-10 02:51:57,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 02:51:57,846 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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 [2022-01-10 02:51:57,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:51:57,852 INFO L225 Difference]: With dead ends: 29 [2022-01-10 02:51:57,853 INFO L226 Difference]: Without dead ends: 12 [2022-01-10 02:51:57,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 02:51:57,858 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:51:57,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:51:57,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-01-10 02:51:57,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-01-10 02:51:57,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 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) [2022-01-10 02:51:57,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2022-01-10 02:51:57,910 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 11 [2022-01-10 02:51:57,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:51:57,910 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2022-01-10 02:51:57,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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) [2022-01-10 02:51:57,911 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2022-01-10 02:51:57,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-10 02:51:57,911 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:51:57,911 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:51:57,935 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-01-10 02:51:58,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:51:58,113 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:51:58,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:51:58,113 INFO L85 PathProgramCache]: Analyzing trace with hash 58526560, now seen corresponding path program 1 times [2022-01-10 02:51:58,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:51:58,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1227102440] [2022-01-10 02:51:58,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:51:58,114 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:51:58,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:51:58,117 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:51:58,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-01-10 02:51:58,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:51:58,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 02:51:58,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:51:58,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:51:58,267 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:51:58,268 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:51:58,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1227102440] [2022-01-10 02:51:58,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1227102440] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:51:58,268 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:51:58,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 02:51:58,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120589485] [2022-01-10 02:51:58,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:51:58,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 02:51:58,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:51:58,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 02:51:58,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 02:51:58,271 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:51:58,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:51:58,314 INFO L93 Difference]: Finished difference Result 27 states and 38 transitions. [2022-01-10 02:51:58,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 02:51:58,314 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-01-10 02:51:58,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:51:58,315 INFO L225 Difference]: With dead ends: 27 [2022-01-10 02:51:58,315 INFO L226 Difference]: Without dead ends: 18 [2022-01-10 02:51:58,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 02:51:58,317 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 5 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:51:58,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 27 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:51:58,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-01-10 02:51:58,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-01-10 02:51:58,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 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) [2022-01-10 02:51:58,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2022-01-10 02:51:58,323 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2022-01-10 02:51:58,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:51:58,323 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2022-01-10 02:51:58,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:51:58,323 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2022-01-10 02:51:58,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-10 02:51:58,324 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:51:58,324 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:51:58,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-01-10 02:51:58,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:51:58,533 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:51:58,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:51:58,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1815988777, now seen corresponding path program 1 times [2022-01-10 02:51:58,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:51:58,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [271076464] [2022-01-10 02:51:58,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:51:58,535 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:51:58,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:51:58,536 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:51:58,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-01-10 02:51:58,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:51:58,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 02:51:58,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:51:58,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:51:58,593 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:51:58,593 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:51:58,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [271076464] [2022-01-10 02:51:58,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [271076464] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:51:58,594 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:51:58,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 02:51:58,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637428360] [2022-01-10 02:51:58,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:51:58,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 02:51:58,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:51:58,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 02:51:58,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 02:51:58,595 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2022-01-10 02:51:58,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:51:58,629 INFO L93 Difference]: Finished difference Result 36 states and 53 transitions. [2022-01-10 02:51:58,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 02:51:58,630 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 12 [2022-01-10 02:51:58,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:51:58,632 INFO L225 Difference]: With dead ends: 36 [2022-01-10 02:51:58,632 INFO L226 Difference]: Without dead ends: 26 [2022-01-10 02:51:58,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 02:51:58,633 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 8 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:51:58,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 21 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:51:58,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-01-10 02:51:58,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2022-01-10 02:51:58,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:51:58,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 33 transitions. [2022-01-10 02:51:58,639 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 33 transitions. Word has length 12 [2022-01-10 02:51:58,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:51:58,639 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 33 transitions. [2022-01-10 02:51:58,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2022-01-10 02:51:58,639 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 33 transitions. [2022-01-10 02:51:58,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-10 02:51:58,640 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:51:58,640 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:51:58,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-01-10 02:51:58,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:51:58,848 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:51:58,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:51:58,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1861241306, now seen corresponding path program 1 times [2022-01-10 02:51:58,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:51:58,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [699743665] [2022-01-10 02:51:58,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:51:58,850 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:51:58,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:51:58,852 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:51:58,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-01-10 02:51:58,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:51:58,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 02:51:58,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:51:58,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:51:58,899 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:51:58,900 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:51:58,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [699743665] [2022-01-10 02:51:58,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [699743665] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:51:58,900 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:51:58,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 02:51:58,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770502706] [2022-01-10 02:51:58,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:51:58,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 02:51:58,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:51:58,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 02:51:58,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 02:51:58,902 INFO L87 Difference]: Start difference. First operand 23 states and 33 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2022-01-10 02:51:58,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:51:58,913 INFO L93 Difference]: Finished difference Result 32 states and 43 transitions. [2022-01-10 02:51:58,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 02:51:58,913 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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 12 [2022-01-10 02:51:58,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:51:58,914 INFO L225 Difference]: With dead ends: 32 [2022-01-10 02:51:58,914 INFO L226 Difference]: Without dead ends: 24 [2022-01-10 02:51:58,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 02:51:58,915 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 5 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:51:58,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 19 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:51:58,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-01-10 02:51:58,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-01-10 02:51:58,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:51:58,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 33 transitions. [2022-01-10 02:51:58,920 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 33 transitions. Word has length 12 [2022-01-10 02:51:58,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:51:58,920 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 33 transitions. [2022-01-10 02:51:58,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2022-01-10 02:51:58,920 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 33 transitions. [2022-01-10 02:51:58,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-10 02:51:58,921 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:51:58,921 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:51:58,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-01-10 02:51:59,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:51:59,131 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:51:59,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:51:59,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1947191488, now seen corresponding path program 1 times [2022-01-10 02:51:59,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:51:59,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1656820767] [2022-01-10 02:51:59,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:51:59,133 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:51:59,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:51:59,134 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:51:59,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-01-10 02:51:59,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:51:59,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 02:51:59,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:51:59,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 02:51:59,206 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:51:59,207 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:51:59,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1656820767] [2022-01-10 02:51:59,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1656820767] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:51:59,210 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:51:59,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 02:51:59,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845580897] [2022-01-10 02:51:59,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:51:59,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 02:51:59,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:51:59,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 02:51:59,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 02:51:59,212 INFO L87 Difference]: Start difference. First operand 24 states and 33 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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) [2022-01-10 02:51:59,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:51:59,256 INFO L93 Difference]: Finished difference Result 31 states and 40 transitions. [2022-01-10 02:51:59,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 02:51:59,256 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-01-10 02:51:59,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:51:59,259 INFO L225 Difference]: With dead ends: 31 [2022-01-10 02:51:59,259 INFO L226 Difference]: Without dead ends: 20 [2022-01-10 02:51:59,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 02:51:59,260 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 9 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:51:59,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 22 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:51:59,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-01-10 02:51:59,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-01-10 02:51:59,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 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) [2022-01-10 02:51:59,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 27 transitions. [2022-01-10 02:51:59,263 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 27 transitions. Word has length 13 [2022-01-10 02:51:59,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:51:59,263 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 27 transitions. [2022-01-10 02:51:59,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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) [2022-01-10 02:51:59,263 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 27 transitions. [2022-01-10 02:51:59,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-10 02:51:59,264 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:51:59,264 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:51:59,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-01-10 02:51:59,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:51:59,473 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:51:59,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:51:59,473 INFO L85 PathProgramCache]: Analyzing trace with hash 240273083, now seen corresponding path program 1 times [2022-01-10 02:51:59,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:51:59,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2089890483] [2022-01-10 02:51:59,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:51:59,474 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:51:59,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:51:59,475 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:51:59,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-01-10 02:51:59,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:51:59,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 02:51:59,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:51:59,538 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 02:51:59,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:51:59,577 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 02:51:59,577 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:51:59,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2089890483] [2022-01-10 02:51:59,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2089890483] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:51:59,578 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:51:59,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-10 02:51:59,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328689676] [2022-01-10 02:51:59,578 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:51:59,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 02:51:59,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:51:59,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 02:51:59,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-10 02:51:59,580 INFO L87 Difference]: Start difference. First operand 20 states and 27 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 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) [2022-01-10 02:51:59,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:51:59,669 INFO L93 Difference]: Finished difference Result 82 states and 109 transitions. [2022-01-10 02:51:59,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 02:51:59,670 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 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) Word has length 14 [2022-01-10 02:51:59,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:51:59,674 INFO L225 Difference]: With dead ends: 82 [2022-01-10 02:51:59,675 INFO L226 Difference]: Without dead ends: 70 [2022-01-10 02:51:59,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 02:51:59,681 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 39 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:51:59,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 49 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 02:51:59,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-01-10 02:51:59,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 32. [2022-01-10 02:51:59,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.4193548387096775) internal successors, (44), 31 states have internal predecessors, (44), 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) [2022-01-10 02:51:59,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 44 transitions. [2022-01-10 02:51:59,694 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 44 transitions. Word has length 14 [2022-01-10 02:51:59,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:51:59,694 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 44 transitions. [2022-01-10 02:51:59,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 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) [2022-01-10 02:51:59,694 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 44 transitions. [2022-01-10 02:51:59,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-10 02:51:59,695 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:51:59,695 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:51:59,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-01-10 02:51:59,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:51:59,906 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:51:59,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:51:59,906 INFO L85 PathProgramCache]: Analyzing trace with hash -601796193, now seen corresponding path program 1 times [2022-01-10 02:51:59,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:51:59,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [367813030] [2022-01-10 02:51:59,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:51:59,907 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:51:59,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:51:59,910 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:51:59,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-01-10 02:51:59,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:51:59,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 02:51:59,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:51:59,977 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 02:51:59,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:52:00,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 02:52:00,044 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:52:00,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [367813030] [2022-01-10 02:52:00,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [367813030] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:52:00,045 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:52:00,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-10 02:52:00,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36295525] [2022-01-10 02:52:00,045 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:52:00,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 02:52:00,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:52:00,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 02:52:00,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-10 02:52:00,047 INFO L87 Difference]: Start difference. First operand 32 states and 44 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 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) [2022-01-10 02:52:00,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:52:00,104 INFO L93 Difference]: Finished difference Result 73 states and 107 transitions. [2022-01-10 02:52:00,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 02:52:00,105 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-10 02:52:00,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:52:00,108 INFO L225 Difference]: With dead ends: 73 [2022-01-10 02:52:00,108 INFO L226 Difference]: Without dead ends: 64 [2022-01-10 02:52:00,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 02:52:00,110 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 12 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:52:00,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 33 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:52:00,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-01-10 02:52:00,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 56. [2022-01-10 02:52:00,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.4727272727272727) internal successors, (81), 55 states have internal predecessors, (81), 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) [2022-01-10 02:52:00,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 81 transitions. [2022-01-10 02:52:00,133 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 81 transitions. Word has length 15 [2022-01-10 02:52:00,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:52:00,139 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 81 transitions. [2022-01-10 02:52:00,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 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) [2022-01-10 02:52:00,140 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 81 transitions. [2022-01-10 02:52:00,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-10 02:52:00,140 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:52:00,140 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:52:00,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-01-10 02:52:00,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:52:00,349 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:52:00,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:52:00,350 INFO L85 PathProgramCache]: Analyzing trace with hash -556543664, now seen corresponding path program 1 times [2022-01-10 02:52:00,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:52:00,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [962623928] [2022-01-10 02:52:00,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:52:00,350 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:52:00,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:52:00,352 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:52:00,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-01-10 02:52:00,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:52:00,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 02:52:00,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:52:00,433 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 02:52:00,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:52:00,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 02:52:00,505 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:52:00,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [962623928] [2022-01-10 02:52:00,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [962623928] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:52:00,505 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:52:00,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-01-10 02:52:00,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373229107] [2022-01-10 02:52:00,506 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:52:00,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-10 02:52:00,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:52:00,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-10 02:52:00,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-01-10 02:52:00,507 INFO L87 Difference]: Start difference. First operand 56 states and 81 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 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) [2022-01-10 02:52:00,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:52:00,987 INFO L93 Difference]: Finished difference Result 162 states and 241 transitions. [2022-01-10 02:52:00,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-10 02:52:00,988 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 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 15 [2022-01-10 02:52:00,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:52:00,989 INFO L225 Difference]: With dead ends: 162 [2022-01-10 02:52:00,989 INFO L226 Difference]: Without dead ends: 146 [2022-01-10 02:52:00,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=984, Unknown=0, NotChecked=0, Total=1260 [2022-01-10 02:52:00,990 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 124 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 02:52:00,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 58 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 02:52:00,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-01-10 02:52:00,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 67. [2022-01-10 02:52:00,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.5) internal successors, (99), 66 states have internal predecessors, (99), 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) [2022-01-10 02:52:00,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 99 transitions. [2022-01-10 02:52:00,998 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 99 transitions. Word has length 15 [2022-01-10 02:52:00,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:52:00,999 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 99 transitions. [2022-01-10 02:52:00,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 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) [2022-01-10 02:52:00,999 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 99 transitions. [2022-01-10 02:52:01,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-10 02:52:01,000 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:52:01,000 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:52:01,010 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-01-10 02:52:01,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:52:01,208 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:52:01,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:52:01,209 INFO L85 PathProgramCache]: Analyzing trace with hash -71318983, now seen corresponding path program 1 times [2022-01-10 02:52:01,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:52:01,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [940504865] [2022-01-10 02:52:01,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:52:01,210 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:52:01,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:52:01,211 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:52:01,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-01-10 02:52:01,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:52:01,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 02:52:01,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:52:01,300 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 02:52:01,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:52:01,352 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 02:52:01,352 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:52:01,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [940504865] [2022-01-10 02:52:01,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [940504865] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:52:01,353 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:52:01,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2022-01-10 02:52:01,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855950479] [2022-01-10 02:52:01,353 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:52:01,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 02:52:01,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:52:01,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 02:52:01,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-10 02:52:01,355 INFO L87 Difference]: Start difference. First operand 67 states and 99 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 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) [2022-01-10 02:52:01,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:52:01,399 INFO L93 Difference]: Finished difference Result 89 states and 127 transitions. [2022-01-10 02:52:01,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 02:52:01,400 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 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 16 [2022-01-10 02:52:01,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:52:01,401 INFO L225 Difference]: With dead ends: 89 [2022-01-10 02:52:01,401 INFO L226 Difference]: Without dead ends: 76 [2022-01-10 02:52:01,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 7 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-10 02:52:01,403 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 6 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:52:01,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 48 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:52:01,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-01-10 02:52:01,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 67. [2022-01-10 02:52:01,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.5454545454545454) internal successors, (102), 66 states have internal predecessors, (102), 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) [2022-01-10 02:52:01,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 102 transitions. [2022-01-10 02:52:01,416 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 102 transitions. Word has length 16 [2022-01-10 02:52:01,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:52:01,416 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 102 transitions. [2022-01-10 02:52:01,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 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) [2022-01-10 02:52:01,416 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 102 transitions. [2022-01-10 02:52:01,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-10 02:52:01,417 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:52:01,417 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:52:01,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-01-10 02:52:01,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:52:01,630 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:52:01,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:52:01,630 INFO L85 PathProgramCache]: Analyzing trace with hash 800911232, now seen corresponding path program 2 times [2022-01-10 02:52:01,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:52:01,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [545545445] [2022-01-10 02:52:01,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 02:52:01,631 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:52:01,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:52:01,632 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:52:01,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-01-10 02:52:01,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 02:52:01,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:52:01,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 02:52:01,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:52:01,715 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 02:52:01,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:52:01,794 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 02:52:01,795 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:52:01,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [545545445] [2022-01-10 02:52:01,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [545545445] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:52:01,795 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:52:01,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-01-10 02:52:01,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161210681] [2022-01-10 02:52:01,795 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:52:01,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 02:52:01,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:52:01,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 02:52:01,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-01-10 02:52:01,797 INFO L87 Difference]: Start difference. First operand 67 states and 102 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 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) [2022-01-10 02:52:02,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:52:02,189 INFO L93 Difference]: Finished difference Result 397 states and 572 transitions. [2022-01-10 02:52:02,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-10 02:52:02,189 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 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 [2022-01-10 02:52:02,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:52:02,190 INFO L225 Difference]: With dead ends: 397 [2022-01-10 02:52:02,190 INFO L226 Difference]: Without dead ends: 361 [2022-01-10 02:52:02,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=206, Invalid=394, Unknown=0, NotChecked=0, Total=600 [2022-01-10 02:52:02,191 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 214 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 02:52:02,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 237 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 02:52:02,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2022-01-10 02:52:02,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 118. [2022-01-10 02:52:02,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.4615384615384615) internal successors, (171), 117 states have internal predecessors, (171), 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) [2022-01-10 02:52:02,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 171 transitions. [2022-01-10 02:52:02,202 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 171 transitions. Word has length 17 [2022-01-10 02:52:02,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:52:02,203 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 171 transitions. [2022-01-10 02:52:02,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 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) [2022-01-10 02:52:02,207 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 171 transitions. [2022-01-10 02:52:02,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-10 02:52:02,208 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:52:02,208 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:52:02,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-01-10 02:52:02,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:52:02,408 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:52:02,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:52:02,409 INFO L85 PathProgramCache]: Analyzing trace with hash 138667680, now seen corresponding path program 2 times [2022-01-10 02:52:02,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:52:02,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [335588393] [2022-01-10 02:52:02,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 02:52:02,409 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:52:02,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:52:02,410 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:52:02,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-01-10 02:52:02,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 02:52:02,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:52:02,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 02:52:02,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:52:02,499 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 02:52:02,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:52:02,584 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 02:52:02,584 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:52:02,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [335588393] [2022-01-10 02:52:02,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [335588393] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:52:02,584 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:52:02,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-01-10 02:52:02,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109994909] [2022-01-10 02:52:02,585 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:52:02,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 02:52:02,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:52:02,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 02:52:02,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-01-10 02:52:02,586 INFO L87 Difference]: Start difference. First operand 118 states and 171 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 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) [2022-01-10 02:52:02,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:52:02,972 INFO L93 Difference]: Finished difference Result 245 states and 329 transitions. [2022-01-10 02:52:02,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-10 02:52:02,973 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 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) Word has length 19 [2022-01-10 02:52:02,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:52:02,974 INFO L225 Difference]: With dead ends: 245 [2022-01-10 02:52:02,974 INFO L226 Difference]: Without dead ends: 207 [2022-01-10 02:52:02,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=759, Unknown=0, NotChecked=0, Total=992 [2022-01-10 02:52:02,975 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 123 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 02:52:02,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 101 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 02:52:02,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-01-10 02:52:02,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 119. [2022-01-10 02:52:02,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.4491525423728813) internal successors, (171), 118 states have internal predecessors, (171), 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) [2022-01-10 02:52:02,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 171 transitions. [2022-01-10 02:52:02,988 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 171 transitions. Word has length 19 [2022-01-10 02:52:02,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:52:02,988 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 171 transitions. [2022-01-10 02:52:02,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 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) [2022-01-10 02:52:02,989 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 171 transitions. [2022-01-10 02:52:02,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-10 02:52:02,989 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:52:02,989 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:52:03,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-01-10 02:52:03,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:52:03,197 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:52:03,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:52:03,197 INFO L85 PathProgramCache]: Analyzing trace with hash -92433222, now seen corresponding path program 3 times [2022-01-10 02:52:03,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:52:03,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [38618453] [2022-01-10 02:52:03,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 02:52:03,198 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:52:03,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:52:03,199 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:52:03,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-01-10 02:52:03,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-10 02:52:03,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:52:03,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 02:52:03,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:52:03,286 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-10 02:52:03,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:52:03,355 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-10 02:52:03,356 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:52:03,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [38618453] [2022-01-10 02:52:03,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [38618453] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:52:03,356 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:52:03,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-01-10 02:52:03,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579172981] [2022-01-10 02:52:03,356 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:52:03,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 02:52:03,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:52:03,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 02:52:03,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-01-10 02:52:03,358 INFO L87 Difference]: Start difference. First operand 119 states and 171 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 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) [2022-01-10 02:52:03,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:52:03,434 INFO L93 Difference]: Finished difference Result 221 states and 321 transitions. [2022-01-10 02:52:03,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 02:52:03,434 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 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 20 [2022-01-10 02:52:03,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:52:03,435 INFO L225 Difference]: With dead ends: 221 [2022-01-10 02:52:03,435 INFO L226 Difference]: Without dead ends: 207 [2022-01-10 02:52:03,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-01-10 02:52:03,436 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 42 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:52:03,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 42 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:52:03,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-01-10 02:52:03,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 180. [2022-01-10 02:52:03,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.4301675977653632) internal successors, (256), 179 states have internal predecessors, (256), 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) [2022-01-10 02:52:03,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 256 transitions. [2022-01-10 02:52:03,452 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 256 transitions. Word has length 20 [2022-01-10 02:52:03,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:52:03,452 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 256 transitions. [2022-01-10 02:52:03,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 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) [2022-01-10 02:52:03,452 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 256 transitions. [2022-01-10 02:52:03,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-10 02:52:03,453 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:52:03,453 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:52:03,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-01-10 02:52:03,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:52:03,661 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:52:03,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:52:03,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1310395177, now seen corresponding path program 4 times [2022-01-10 02:52:03,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:52:03,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [692592433] [2022-01-10 02:52:03,662 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 02:52:03,662 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:52:03,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:52:03,663 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:52:03,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-01-10 02:52:03,701 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 02:52:03,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:52:03,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 02:52:03,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:52:03,788 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 02:52:03,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:52:03,885 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 02:52:03,885 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:52:03,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [692592433] [2022-01-10 02:52:03,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [692592433] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:52:03,886 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:52:03,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-01-10 02:52:03,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642607292] [2022-01-10 02:52:03,886 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:52:03,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-10 02:52:03,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:52:03,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-10 02:52:03,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-01-10 02:52:03,887 INFO L87 Difference]: Start difference. First operand 180 states and 256 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 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) [2022-01-10 02:52:05,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:52:05,066 INFO L93 Difference]: Finished difference Result 384 states and 544 transitions. [2022-01-10 02:52:05,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-10 02:52:05,067 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 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 20 [2022-01-10 02:52:05,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:52:05,069 INFO L225 Difference]: With dead ends: 384 [2022-01-10 02:52:05,069 INFO L226 Difference]: Without dead ends: 358 [2022-01-10 02:52:05,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2180 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=998, Invalid=5322, Unknown=0, NotChecked=0, Total=6320 [2022-01-10 02:52:05,072 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 304 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 348 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 348 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 02:52:05,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 115 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [348 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 02:52:05,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2022-01-10 02:52:05,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 182. [2022-01-10 02:52:05,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 1.4696132596685083) internal successors, (266), 181 states have internal predecessors, (266), 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) [2022-01-10 02:52:05,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 266 transitions. [2022-01-10 02:52:05,084 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 266 transitions. Word has length 20 [2022-01-10 02:52:05,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:52:05,084 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 266 transitions. [2022-01-10 02:52:05,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 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) [2022-01-10 02:52:05,085 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 266 transitions. [2022-01-10 02:52:05,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-10 02:52:05,085 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:52:05,085 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:52:05,094 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2022-01-10 02:52:05,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:52:05,294 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:52:05,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:52:05,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1969210240, now seen corresponding path program 5 times [2022-01-10 02:52:05,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:52:05,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1789333262] [2022-01-10 02:52:05,295 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 02:52:05,295 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:52:05,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:52:05,296 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:52:05,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-01-10 02:52:05,359 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 02:52:05,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:52:05,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 02:52:05,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:52:05,421 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 02:52:05,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:52:05,481 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 02:52:05,481 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:52:05,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1789333262] [2022-01-10 02:52:05,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1789333262] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:52:05,481 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:52:05,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-01-10 02:52:05,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022482904] [2022-01-10 02:52:05,482 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:52:05,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 02:52:05,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:52:05,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 02:52:05,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-01-10 02:52:05,483 INFO L87 Difference]: Start difference. First operand 182 states and 266 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2022-01-10 02:52:05,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:52:05,550 INFO L93 Difference]: Finished difference Result 234 states and 332 transitions. [2022-01-10 02:52:05,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 02:52:05,550 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-10 02:52:05,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:52:05,551 INFO L225 Difference]: With dead ends: 234 [2022-01-10 02:52:05,551 INFO L226 Difference]: Without dead ends: 217 [2022-01-10 02:52:05,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 7 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-01-10 02:52:05,552 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 11 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:52:05,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 84 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 02:52:05,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-01-10 02:52:05,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 190. [2022-01-10 02:52:05,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 1.492063492063492) internal successors, (282), 189 states have internal predecessors, (282), 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) [2022-01-10 02:52:05,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 282 transitions. [2022-01-10 02:52:05,562 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 282 transitions. Word has length 21 [2022-01-10 02:52:05,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:52:05,563 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 282 transitions. [2022-01-10 02:52:05,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2022-01-10 02:52:05,564 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 282 transitions. [2022-01-10 02:52:05,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-10 02:52:05,565 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:52:05,565 INFO L514 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:52:05,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-01-10 02:52:05,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:52:05,775 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:52:05,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:52:05,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1739128160, now seen corresponding path program 6 times [2022-01-10 02:52:05,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:52:05,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1955239481] [2022-01-10 02:52:05,775 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-10 02:52:05,776 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:52:05,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:52:05,777 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:52:05,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-01-10 02:52:05,811 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-10 02:52:05,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:52:05,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 02:52:05,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:52:05,878 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-10 02:52:05,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:52:05,939 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-10 02:52:05,940 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:52:05,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1955239481] [2022-01-10 02:52:05,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1955239481] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:52:05,940 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:52:05,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-01-10 02:52:05,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794473685] [2022-01-10 02:52:05,940 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:52:05,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 02:52:05,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:52:05,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 02:52:05,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-01-10 02:52:05,941 INFO L87 Difference]: Start difference. First operand 190 states and 282 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 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) [2022-01-10 02:52:06,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:52:06,032 INFO L93 Difference]: Finished difference Result 221 states and 315 transitions. [2022-01-10 02:52:06,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 02:52:06,033 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 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) Word has length 23 [2022-01-10 02:52:06,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:52:06,034 INFO L225 Difference]: With dead ends: 221 [2022-01-10 02:52:06,034 INFO L226 Difference]: Without dead ends: 195 [2022-01-10 02:52:06,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-01-10 02:52:06,035 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 21 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:52:06,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 43 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 02:52:06,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-01-10 02:52:06,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 177. [2022-01-10 02:52:06,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 1.4886363636363635) internal successors, (262), 176 states have internal predecessors, (262), 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) [2022-01-10 02:52:06,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 262 transitions. [2022-01-10 02:52:06,055 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 262 transitions. Word has length 23 [2022-01-10 02:52:06,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:52:06,055 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 262 transitions. [2022-01-10 02:52:06,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 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) [2022-01-10 02:52:06,055 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 262 transitions. [2022-01-10 02:52:06,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-10 02:52:06,058 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:52:06,058 INFO L514 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:52:06,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-01-10 02:52:06,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:52:06,267 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:52:06,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:52:06,267 INFO L85 PathProgramCache]: Analyzing trace with hash 990685888, now seen corresponding path program 7 times [2022-01-10 02:52:06,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:52:06,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [515438138] [2022-01-10 02:52:06,267 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-10 02:52:06,268 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:52:06,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:52:06,269 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:52:06,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-01-10 02:52:06,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:52:06,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-10 02:52:06,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:52:06,419 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 02:52:06,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:52:06,596 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 02:52:06,596 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:52:06,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [515438138] [2022-01-10 02:52:06,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [515438138] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:52:06,596 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:52:06,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2022-01-10 02:52:06,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877463785] [2022-01-10 02:52:06,596 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:52:06,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-10 02:52:06,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:52:06,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-10 02:52:06,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-01-10 02:52:06,598 INFO L87 Difference]: Start difference. First operand 177 states and 262 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 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) [2022-01-10 02:52:10,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:52:10,111 INFO L93 Difference]: Finished difference Result 768 states and 1070 transitions. [2022-01-10 02:52:10,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2022-01-10 02:52:10,112 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 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 23 [2022-01-10 02:52:10,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:52:10,114 INFO L225 Difference]: With dead ends: 768 [2022-01-10 02:52:10,114 INFO L226 Difference]: Without dead ends: 667 [2022-01-10 02:52:10,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9397 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4739, Invalid=18823, Unknown=0, NotChecked=0, Total=23562 [2022-01-10 02:52:10,122 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 601 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 850 mSolverCounterSat, 579 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 601 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 1429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 579 IncrementalHoareTripleChecker+Valid, 850 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 02:52:10,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [601 Valid, 531 Invalid, 1429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [579 Valid, 850 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 02:52:10,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2022-01-10 02:52:10,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 225. [2022-01-10 02:52:10,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.4508928571428572) internal successors, (325), 224 states have internal predecessors, (325), 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) [2022-01-10 02:52:10,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 325 transitions. [2022-01-10 02:52:10,141 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 325 transitions. Word has length 23 [2022-01-10 02:52:10,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:52:10,142 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 325 transitions. [2022-01-10 02:52:10,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 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) [2022-01-10 02:52:10,143 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 325 transitions. [2022-01-10 02:52:10,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-10 02:52:10,143 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:52:10,143 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:52:10,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-01-10 02:52:10,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:52:10,353 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:52:10,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:52:10,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1504359434, now seen corresponding path program 2 times [2022-01-10 02:52:10,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:52:10,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1917973652] [2022-01-10 02:52:10,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 02:52:10,354 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:52:10,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:52:10,354 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:52:10,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-01-10 02:52:10,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 02:52:10,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:52:10,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 02:52:10,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:52:10,481 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-10 02:52:10,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:52:10,540 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-10 02:52:10,540 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:52:10,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1917973652] [2022-01-10 02:52:10,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1917973652] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:52:10,541 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:52:10,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2022-01-10 02:52:10,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520161444] [2022-01-10 02:52:10,541 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:52:10,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-10 02:52:10,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:52:10,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-10 02:52:10,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-01-10 02:52:10,542 INFO L87 Difference]: Start difference. First operand 225 states and 325 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 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) [2022-01-10 02:52:10,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:52:10,894 INFO L93 Difference]: Finished difference Result 327 states and 453 transitions. [2022-01-10 02:52:10,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-10 02:52:10,895 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 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) Word has length 24 [2022-01-10 02:52:10,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:52:10,896 INFO L225 Difference]: With dead ends: 327 [2022-01-10 02:52:10,896 INFO L226 Difference]: Without dead ends: 297 [2022-01-10 02:52:10,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2022-01-10 02:52:10,897 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 53 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 02:52:10,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 231 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 02:52:10,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-01-10 02:52:10,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 234. [2022-01-10 02:52:10,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 1.4248927038626609) internal successors, (332), 233 states have internal predecessors, (332), 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) [2022-01-10 02:52:10,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 332 transitions. [2022-01-10 02:52:10,914 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 332 transitions. Word has length 24 [2022-01-10 02:52:10,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:52:10,914 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 332 transitions. [2022-01-10 02:52:10,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 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) [2022-01-10 02:52:10,915 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 332 transitions. [2022-01-10 02:52:10,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-10 02:52:10,915 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:52:10,915 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:52:10,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-01-10 02:52:11,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:52:11,125 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:52:11,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:52:11,125 INFO L85 PathProgramCache]: Analyzing trace with hash -703235457, now seen corresponding path program 8 times [2022-01-10 02:52:11,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:52:11,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [88672972] [2022-01-10 02:52:11,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 02:52:11,125 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:52:11,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:52:11,127 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:52:11,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-01-10 02:52:11,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 02:52:11,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:52:11,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 02:52:11,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:52:11,215 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-10 02:52:11,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:52:11,279 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-10 02:52:11,279 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:52:11,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [88672972] [2022-01-10 02:52:11,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [88672972] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:52:11,280 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:52:11,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-01-10 02:52:11,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943669970] [2022-01-10 02:52:11,280 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:52:11,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-10 02:52:11,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:52:11,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-10 02:52:11,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-01-10 02:52:11,281 INFO L87 Difference]: Start difference. First operand 234 states and 332 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 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) [2022-01-10 02:52:11,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:52:11,381 INFO L93 Difference]: Finished difference Result 412 states and 609 transitions. [2022-01-10 02:52:11,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-10 02:52:11,387 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 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) Word has length 25 [2022-01-10 02:52:11,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:52:11,389 INFO L225 Difference]: With dead ends: 412 [2022-01-10 02:52:11,389 INFO L226 Difference]: Without dead ends: 390 [2022-01-10 02:52:11,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-01-10 02:52:11,390 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 38 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:52:11,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 73 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:52:11,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-01-10 02:52:11,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 341. [2022-01-10 02:52:11,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 1.4205882352941177) internal successors, (483), 340 states have internal predecessors, (483), 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) [2022-01-10 02:52:11,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 483 transitions. [2022-01-10 02:52:11,409 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 483 transitions. Word has length 25 [2022-01-10 02:52:11,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:52:11,409 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 483 transitions. [2022-01-10 02:52:11,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 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) [2022-01-10 02:52:11,410 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 483 transitions. [2022-01-10 02:52:11,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-10 02:52:11,410 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:52:11,410 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:52:11,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-01-10 02:52:11,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:52:11,619 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:52:11,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:52:11,620 INFO L85 PathProgramCache]: Analyzing trace with hash -825436775, now seen corresponding path program 9 times [2022-01-10 02:52:11,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:52:11,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [439981932] [2022-01-10 02:52:11,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 02:52:11,620 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:52:11,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:52:11,621 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:52:11,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-01-10 02:52:11,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-10 02:52:11,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:52:11,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 02:52:11,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:52:11,732 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-10 02:52:11,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:52:11,779 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-10 02:52:11,779 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:52:11,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [439981932] [2022-01-10 02:52:11,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [439981932] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:52:11,779 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:52:11,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2022-01-10 02:52:11,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256087683] [2022-01-10 02:52:11,780 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:52:11,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 02:52:11,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:52:11,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 02:52:11,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-01-10 02:52:11,781 INFO L87 Difference]: Start difference. First operand 341 states and 483 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 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) [2022-01-10 02:52:11,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:52:11,888 INFO L93 Difference]: Finished difference Result 408 states and 565 transitions. [2022-01-10 02:52:11,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 02:52:11,888 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-10 02:52:11,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:52:11,889 INFO L225 Difference]: With dead ends: 408 [2022-01-10 02:52:11,890 INFO L226 Difference]: Without dead ends: 387 [2022-01-10 02:52:11,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-01-10 02:52:11,890 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 20 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:52:11,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 122 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 02:52:11,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-01-10 02:52:11,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 342. [2022-01-10 02:52:11,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 1.436950146627566) internal successors, (490), 341 states have internal predecessors, (490), 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) [2022-01-10 02:52:11,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 490 transitions. [2022-01-10 02:52:11,908 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 490 transitions. Word has length 26 [2022-01-10 02:52:11,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:52:11,908 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 490 transitions. [2022-01-10 02:52:11,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 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) [2022-01-10 02:52:11,908 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 490 transitions. [2022-01-10 02:52:11,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-10 02:52:11,909 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:52:11,909 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:52:11,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-01-10 02:52:12,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:52:12,119 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:52:12,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:52:12,119 INFO L85 PathProgramCache]: Analyzing trace with hash -363700416, now seen corresponding path program 3 times [2022-01-10 02:52:12,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:52:12,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2093665375] [2022-01-10 02:52:12,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 02:52:12,119 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:52:12,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:52:12,120 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:52:12,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-01-10 02:52:12,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-10 02:52:12,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:52:12,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 02:52:12,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:52:12,220 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-10 02:52:12,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:52:12,290 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-10 02:52:12,291 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:52:12,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2093665375] [2022-01-10 02:52:12,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2093665375] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:52:12,291 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:52:12,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-01-10 02:52:12,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667564973] [2022-01-10 02:52:12,291 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:52:12,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 02:52:12,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:52:12,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 02:52:12,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2022-01-10 02:52:12,292 INFO L87 Difference]: Start difference. First operand 342 states and 490 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 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) [2022-01-10 02:52:12,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:52:12,486 INFO L93 Difference]: Finished difference Result 497 states and 738 transitions. [2022-01-10 02:52:12,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-10 02:52:12,487 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 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) Word has length 27 [2022-01-10 02:52:12,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:52:12,489 INFO L225 Difference]: With dead ends: 497 [2022-01-10 02:52:12,489 INFO L226 Difference]: Without dead ends: 492 [2022-01-10 02:52:12,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=284, Unknown=0, NotChecked=0, Total=420 [2022-01-10 02:52:12,490 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 112 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:52:12,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 103 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 02:52:12,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2022-01-10 02:52:12,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 375. [2022-01-10 02:52:12,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 374 states have (on average 1.4946524064171123) internal successors, (559), 374 states have internal predecessors, (559), 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) [2022-01-10 02:52:12,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 559 transitions. [2022-01-10 02:52:12,511 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 559 transitions. Word has length 27 [2022-01-10 02:52:12,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:52:12,511 INFO L470 AbstractCegarLoop]: Abstraction has 375 states and 559 transitions. [2022-01-10 02:52:12,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 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) [2022-01-10 02:52:12,511 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 559 transitions. [2022-01-10 02:52:12,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-10 02:52:12,512 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:52:12,512 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:52:12,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-01-10 02:52:12,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:52:12,721 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:52:12,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:52:12,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1570455456, now seen corresponding path program 4 times [2022-01-10 02:52:12,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:52:12,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [694422903] [2022-01-10 02:52:12,722 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 02:52:12,722 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:52:12,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:52:12,723 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:52:12,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-01-10 02:52:12,773 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 02:52:12,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:52:12,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-10 02:52:12,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:52:12,878 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-10 02:52:12,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:52:12,952 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-10 02:52:12,953 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:52:12,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [694422903] [2022-01-10 02:52:12,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [694422903] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:52:12,953 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:52:12,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2022-01-10 02:52:12,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086039056] [2022-01-10 02:52:12,953 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:52:12,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 02:52:12,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:52:12,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 02:52:12,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-01-10 02:52:12,955 INFO L87 Difference]: Start difference. First operand 375 states and 559 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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) [2022-01-10 02:52:13,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:52:13,511 INFO L93 Difference]: Finished difference Result 507 states and 720 transitions. [2022-01-10 02:52:13,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-10 02:52:13,515 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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) Word has length 29 [2022-01-10 02:52:13,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:52:13,517 INFO L225 Difference]: With dead ends: 507 [2022-01-10 02:52:13,517 INFO L226 Difference]: Without dead ends: 467 [2022-01-10 02:52:13,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=1211, Unknown=0, NotChecked=0, Total=1332 [2022-01-10 02:52:13,518 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 84 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 02:52:13,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 345 Invalid, 789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 709 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 02:52:13,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2022-01-10 02:52:13,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 356. [2022-01-10 02:52:13,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 1.5070422535211268) internal successors, (535), 355 states have internal predecessors, (535), 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) [2022-01-10 02:52:13,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 535 transitions. [2022-01-10 02:52:13,538 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 535 transitions. Word has length 29 [2022-01-10 02:52:13,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:52:13,538 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 535 transitions. [2022-01-10 02:52:13,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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) [2022-01-10 02:52:13,538 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 535 transitions. [2022-01-10 02:52:13,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-10 02:52:13,539 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:52:13,539 INFO L514 BasicCegarLoop]: trace histogram [12, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:52:13,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-01-10 02:52:13,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:52:13,748 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:52:13,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:52:13,748 INFO L85 PathProgramCache]: Analyzing trace with hash -572072064, now seen corresponding path program 3 times [2022-01-10 02:52:13,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:52:13,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [468912559] [2022-01-10 02:52:13,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 02:52:13,749 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:52:13,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:52:13,750 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:52:13,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-01-10 02:52:13,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-10 02:52:13,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:52:13,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 02:52:13,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:52:13,820 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-01-10 02:52:13,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:52:13,858 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-01-10 02:52:13,858 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:52:13,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [468912559] [2022-01-10 02:52:13,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [468912559] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 02:52:13,858 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 02:52:13,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2022-01-10 02:52:13,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633863309] [2022-01-10 02:52:13,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:52:13,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 02:52:13,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:52:13,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 02:52:13,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 02:52:13,860 INFO L87 Difference]: Start difference. First operand 356 states and 535 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:52:13,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:52:13,898 INFO L93 Difference]: Finished difference Result 364 states and 542 transitions. [2022-01-10 02:52:13,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 02:52:13,899 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-10 02:52:13,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:52:13,900 INFO L225 Difference]: With dead ends: 364 [2022-01-10 02:52:13,900 INFO L226 Difference]: Without dead ends: 349 [2022-01-10 02:52:13,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 02:52:13,901 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 4 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:52:13,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 20 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:52:13,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-01-10 02:52:13,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 331. [2022-01-10 02:52:13,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 1.4727272727272727) internal successors, (486), 330 states have internal predecessors, (486), 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) [2022-01-10 02:52:13,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 486 transitions. [2022-01-10 02:52:13,925 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 486 transitions. Word has length 29 [2022-01-10 02:52:13,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:52:13,925 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 486 transitions. [2022-01-10 02:52:13,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:52:13,925 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 486 transitions. [2022-01-10 02:52:13,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-10 02:52:13,926 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:52:13,926 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:52:13,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-01-10 02:52:14,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:52:14,134 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:52:14,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:52:14,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1966088282, now seen corresponding path program 10 times [2022-01-10 02:52:14,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:52:14,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1825543272] [2022-01-10 02:52:14,135 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 02:52:14,135 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:52:14,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:52:14,136 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:52:14,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-01-10 02:52:14,184 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 02:52:14,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:52:14,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 02:52:14,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:52:14,258 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-10 02:52:14,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:52:14,344 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-10 02:52:14,344 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:52:14,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1825543272] [2022-01-10 02:52:14,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1825543272] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:52:14,344 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:52:14,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-01-10 02:52:14,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514428479] [2022-01-10 02:52:14,345 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:52:14,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 02:52:14,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:52:14,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 02:52:14,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-01-10 02:52:14,345 INFO L87 Difference]: Start difference. First operand 331 states and 486 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 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) [2022-01-10 02:52:14,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:52:14,511 INFO L93 Difference]: Finished difference Result 533 states and 815 transitions. [2022-01-10 02:52:14,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-10 02:52:14,512 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 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 30 [2022-01-10 02:52:14,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:52:14,514 INFO L225 Difference]: With dead ends: 533 [2022-01-10 02:52:14,514 INFO L226 Difference]: Without dead ends: 504 [2022-01-10 02:52:14,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2022-01-10 02:52:14,515 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 72 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:52:14,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 106 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 02:52:14,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2022-01-10 02:52:14,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 423. [2022-01-10 02:52:14,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 1.4881516587677726) internal successors, (628), 422 states have internal predecessors, (628), 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) [2022-01-10 02:52:14,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 628 transitions. [2022-01-10 02:52:14,536 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 628 transitions. Word has length 30 [2022-01-10 02:52:14,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:52:14,537 INFO L470 AbstractCegarLoop]: Abstraction has 423 states and 628 transitions. [2022-01-10 02:52:14,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 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) [2022-01-10 02:52:14,538 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 628 transitions. [2022-01-10 02:52:14,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-10 02:52:14,538 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:52:14,538 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:52:14,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-01-10 02:52:14,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:52:14,747 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:52:14,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:52:14,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1845062752, now seen corresponding path program 11 times [2022-01-10 02:52:14,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:52:14,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [813017085] [2022-01-10 02:52:14,748 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 02:52:14,748 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:52:14,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:52:14,749 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:52:14,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-01-10 02:52:14,797 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-10 02:52:14,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:52:14,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-10 02:52:14,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:52:14,900 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-10 02:52:14,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:52:14,995 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-10 02:52:14,995 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:52:14,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [813017085] [2022-01-10 02:52:14,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [813017085] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:52:14,995 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:52:14,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-01-10 02:52:14,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307908224] [2022-01-10 02:52:14,995 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:52:14,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-10 02:52:14,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:52:14,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-10 02:52:14,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-01-10 02:52:14,996 INFO L87 Difference]: Start difference. First operand 423 states and 628 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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) [2022-01-10 02:52:15,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:52:15,089 INFO L93 Difference]: Finished difference Result 536 states and 764 transitions. [2022-01-10 02:52:15,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 02:52:15,090 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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) Word has length 31 [2022-01-10 02:52:15,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:52:15,091 INFO L225 Difference]: With dead ends: 536 [2022-01-10 02:52:15,092 INFO L226 Difference]: Without dead ends: 511 [2022-01-10 02:52:15,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 38 SyntacticMatches, 15 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-01-10 02:52:15,092 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 21 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:52:15,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 148 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 02:52:15,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2022-01-10 02:52:15,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 435. [2022-01-10 02:52:15,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 1.4976958525345623) internal successors, (650), 434 states have internal predecessors, (650), 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) [2022-01-10 02:52:15,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 650 transitions. [2022-01-10 02:52:15,113 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 650 transitions. Word has length 31 [2022-01-10 02:52:15,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:52:15,113 INFO L470 AbstractCegarLoop]: Abstraction has 435 states and 650 transitions. [2022-01-10 02:52:15,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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) [2022-01-10 02:52:15,113 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 650 transitions. [2022-01-10 02:52:15,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-10 02:52:15,114 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:52:15,114 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:52:15,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-01-10 02:52:15,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:52:15,323 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:52:15,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:52:15,323 INFO L85 PathProgramCache]: Analyzing trace with hash 739679999, now seen corresponding path program 5 times [2022-01-10 02:52:15,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:52:15,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1839976463] [2022-01-10 02:52:15,323 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 02:52:15,324 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:52:15,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:52:15,325 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:52:15,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-01-10 02:52:15,365 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-10 02:52:15,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:52:15,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 02:52:15,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:52:15,449 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-10 02:52:15,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:52:15,583 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-10 02:52:15,584 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:52:15,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1839976463] [2022-01-10 02:52:15,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1839976463] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:52:15,584 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:52:15,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-01-10 02:52:15,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924608957] [2022-01-10 02:52:15,584 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:52:15,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 02:52:15,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:52:15,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 02:52:15,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2022-01-10 02:52:15,585 INFO L87 Difference]: Start difference. First operand 435 states and 650 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 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) [2022-01-10 02:52:16,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:52:16,008 INFO L93 Difference]: Finished difference Result 962 states and 1511 transitions. [2022-01-10 02:52:16,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-10 02:52:16,009 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-01-10 02:52:16,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:52:16,012 INFO L225 Difference]: With dead ends: 962 [2022-01-10 02:52:16,012 INFO L226 Difference]: Without dead ends: 930 [2022-01-10 02:52:16,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=338, Invalid=592, Unknown=0, NotChecked=0, Total=930 [2022-01-10 02:52:16,013 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 238 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 02:52:16,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 227 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 02:52:16,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2022-01-10 02:52:16,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 531. [2022-01-10 02:52:16,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 530 states have (on average 1.4660377358490566) internal successors, (777), 530 states have internal predecessors, (777), 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) [2022-01-10 02:52:16,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 777 transitions. [2022-01-10 02:52:16,046 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 777 transitions. Word has length 31 [2022-01-10 02:52:16,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:52:16,047 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 777 transitions. [2022-01-10 02:52:16,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 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) [2022-01-10 02:52:16,047 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 777 transitions. [2022-01-10 02:52:16,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-10 02:52:16,048 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:52:16,048 INFO L514 BasicCegarLoop]: trace histogram [14, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:52:16,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-01-10 02:52:16,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:52:16,258 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:52:16,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:52:16,258 INFO L85 PathProgramCache]: Analyzing trace with hash -540362688, now seen corresponding path program 12 times [2022-01-10 02:52:16,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:52:16,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [437052609] [2022-01-10 02:52:16,258 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-10 02:52:16,259 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:52:16,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:52:16,260 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:52:16,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-01-10 02:52:16,289 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-10 02:52:16,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:52:16,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 02:52:16,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:52:16,351 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-01-10 02:52:16,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:52:16,442 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-01-10 02:52:16,442 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:52:16,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [437052609] [2022-01-10 02:52:16,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [437052609] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:52:16,443 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:52:16,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-01-10 02:52:16,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970396640] [2022-01-10 02:52:16,443 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:52:16,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 02:52:16,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:52:16,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 02:52:16,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-01-10 02:52:16,444 INFO L87 Difference]: Start difference. First operand 531 states and 777 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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) [2022-01-10 02:52:16,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:52:16,631 INFO L93 Difference]: Finished difference Result 592 states and 838 transitions. [2022-01-10 02:52:16,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 02:52:16,632 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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) Word has length 31 [2022-01-10 02:52:16,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:52:16,634 INFO L225 Difference]: With dead ends: 592 [2022-01-10 02:52:16,634 INFO L226 Difference]: Without dead ends: 565 [2022-01-10 02:52:16,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2022-01-10 02:52:16,635 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 18 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:52:16,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 64 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 02:52:16,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2022-01-10 02:52:16,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 479. [2022-01-10 02:52:16,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 478 states have (on average 1.4414225941422594) internal successors, (689), 478 states have internal predecessors, (689), 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) [2022-01-10 02:52:16,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 689 transitions. [2022-01-10 02:52:16,660 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 689 transitions. Word has length 31 [2022-01-10 02:52:16,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:52:16,660 INFO L470 AbstractCegarLoop]: Abstraction has 479 states and 689 transitions. [2022-01-10 02:52:16,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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) [2022-01-10 02:52:16,660 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 689 transitions. [2022-01-10 02:52:16,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-10 02:52:16,661 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:52:16,661 INFO L514 BasicCegarLoop]: trace histogram [7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:52:16,670 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2022-01-10 02:52:16,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:52:16,870 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:52:16,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:52:16,870 INFO L85 PathProgramCache]: Analyzing trace with hash 55640987, now seen corresponding path program 13 times [2022-01-10 02:52:16,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:52:16,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [818810130] [2022-01-10 02:52:16,870 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-10 02:52:16,871 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:52:16,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:52:16,872 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:52:16,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-01-10 02:52:16,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:52:16,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-10 02:52:16,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:52:17,046 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-01-10 02:52:17,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:52:17,266 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-01-10 02:52:17,266 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:52:17,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [818810130] [2022-01-10 02:52:17,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [818810130] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:52:17,266 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:52:17,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-01-10 02:52:17,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749591646] [2022-01-10 02:52:17,266 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:52:17,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-10 02:52:17,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:52:17,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-10 02:52:17,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2022-01-10 02:52:17,268 INFO L87 Difference]: Start difference. First operand 479 states and 689 transitions. Second operand has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 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) [2022-01-10 02:52:22,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:52:22,255 INFO L93 Difference]: Finished difference Result 1759 states and 2374 transitions. [2022-01-10 02:52:22,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 206 states. [2022-01-10 02:52:22,257 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 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 32 [2022-01-10 02:52:22,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:52:22,260 INFO L225 Difference]: With dead ends: 1759 [2022-01-10 02:52:22,260 INFO L226 Difference]: Without dead ends: 1481 [2022-01-10 02:52:22,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18446 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=7798, Invalid=36512, Unknown=0, NotChecked=0, Total=44310 [2022-01-10 02:52:22,266 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 810 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 1092 mSolverCounterSat, 749 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 810 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 1841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 749 IncrementalHoareTripleChecker+Valid, 1092 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 02:52:22,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [810 Valid, 584 Invalid, 1841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [749 Valid, 1092 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 02:52:22,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1481 states. [2022-01-10 02:52:22,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1481 to 551. [2022-01-10 02:52:22,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 551 states, 550 states have (on average 1.4436363636363636) internal successors, (794), 550 states have internal predecessors, (794), 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) [2022-01-10 02:52:22,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 794 transitions. [2022-01-10 02:52:22,307 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 794 transitions. Word has length 32 [2022-01-10 02:52:22,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:52:22,307 INFO L470 AbstractCegarLoop]: Abstraction has 551 states and 794 transitions. [2022-01-10 02:52:22,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 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) [2022-01-10 02:52:22,307 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 794 transitions. [2022-01-10 02:52:22,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-10 02:52:22,308 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:52:22,308 INFO L514 BasicCegarLoop]: trace histogram [8, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:52:22,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-01-10 02:52:22,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:52:22,518 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:52:22,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:52:22,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1236991779, now seen corresponding path program 14 times [2022-01-10 02:52:22,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:52:22,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [147262828] [2022-01-10 02:52:22,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 02:52:22,518 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:52:22,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:52:22,519 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:52:22,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-01-10 02:52:22,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 02:52:22,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:52:22,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-10 02:52:22,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:52:22,679 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-10 02:52:22,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:52:22,751 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-10 02:52:22,751 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:52:22,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [147262828] [2022-01-10 02:52:22,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [147262828] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:52:22,752 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:52:22,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2022-01-10 02:52:22,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616656704] [2022-01-10 02:52:22,752 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:52:22,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-10 02:52:22,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:52:22,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-10 02:52:22,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2022-01-10 02:52:22,753 INFO L87 Difference]: Start difference. First operand 551 states and 794 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 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) [2022-01-10 02:52:23,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:52:23,454 INFO L93 Difference]: Finished difference Result 920 states and 1207 transitions. [2022-01-10 02:52:23,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-10 02:52:23,455 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 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 33 [2022-01-10 02:52:23,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:52:23,457 INFO L225 Difference]: With dead ends: 920 [2022-01-10 02:52:23,457 INFO L226 Difference]: Without dead ends: 838 [2022-01-10 02:52:23,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=2281, Unknown=0, NotChecked=0, Total=2450 [2022-01-10 02:52:23,458 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 70 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 1042 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 1146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 02:52:23,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 515 Invalid, 1146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1042 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 02:52:23,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2022-01-10 02:52:23,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 557. [2022-01-10 02:52:23,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 556 states have (on average 1.4244604316546763) internal successors, (792), 556 states have internal predecessors, (792), 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) [2022-01-10 02:52:23,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 792 transitions. [2022-01-10 02:52:23,493 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 792 transitions. Word has length 33 [2022-01-10 02:52:23,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:52:23,493 INFO L470 AbstractCegarLoop]: Abstraction has 557 states and 792 transitions. [2022-01-10 02:52:23,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 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) [2022-01-10 02:52:23,494 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 792 transitions. [2022-01-10 02:52:23,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-10 02:52:23,495 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:52:23,495 INFO L514 BasicCegarLoop]: trace histogram [8, 6, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:52:23,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-01-10 02:52:23,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:52:23,704 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:52:23,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:52:23,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1428660529, now seen corresponding path program 15 times [2022-01-10 02:52:23,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:52:23,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1052169353] [2022-01-10 02:52:23,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 02:52:23,704 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:52:23,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:52:23,705 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:52:23,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-01-10 02:52:23,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-10 02:52:23,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:52:23,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-10 02:52:23,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:52:23,832 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-01-10 02:52:23,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:52:23,939 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-01-10 02:52:23,940 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:52:23,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1052169353] [2022-01-10 02:52:23,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1052169353] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:52:23,940 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:52:23,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-01-10 02:52:23,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114326198] [2022-01-10 02:52:23,940 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:52:23,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 02:52:23,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:52:23,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 02:52:23,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2022-01-10 02:52:23,941 INFO L87 Difference]: Start difference. First operand 557 states and 792 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 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) [2022-01-10 02:52:24,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:52:24,304 INFO L93 Difference]: Finished difference Result 896 states and 1275 transitions. [2022-01-10 02:52:24,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-10 02:52:24,304 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 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 35 [2022-01-10 02:52:24,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:52:24,306 INFO L225 Difference]: With dead ends: 896 [2022-01-10 02:52:24,307 INFO L226 Difference]: Without dead ends: 891 [2022-01-10 02:52:24,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=322, Invalid=734, Unknown=0, NotChecked=0, Total=1056 [2022-01-10 02:52:24,307 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 181 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:52:24,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 141 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 02:52:24,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2022-01-10 02:52:24,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 665. [2022-01-10 02:52:24,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 664 states have (on average 1.4367469879518073) internal successors, (954), 664 states have internal predecessors, (954), 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) [2022-01-10 02:52:24,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 954 transitions. [2022-01-10 02:52:24,339 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 954 transitions. Word has length 35 [2022-01-10 02:52:24,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:52:24,339 INFO L470 AbstractCegarLoop]: Abstraction has 665 states and 954 transitions. [2022-01-10 02:52:24,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 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) [2022-01-10 02:52:24,339 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 954 transitions. [2022-01-10 02:52:24,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-10 02:52:24,340 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:52:24,341 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:52:24,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-01-10 02:52:24,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:52:24,550 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:52:24,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:52:24,550 INFO L85 PathProgramCache]: Analyzing trace with hash -633630471, now seen corresponding path program 16 times [2022-01-10 02:52:24,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:52:24,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1851452106] [2022-01-10 02:52:24,551 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 02:52:24,556 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:52:24,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:52:24,557 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:52:24,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-01-10 02:52:24,607 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 02:52:24,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:52:24,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-10 02:52:24,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:52:24,738 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-10 02:52:24,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:52:24,828 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-10 02:52:24,829 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:52:24,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1851452106] [2022-01-10 02:52:24,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1851452106] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:52:24,829 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:52:24,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2022-01-10 02:52:24,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055387229] [2022-01-10 02:52:24,829 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:52:24,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-10 02:52:24,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:52:24,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-10 02:52:24,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-01-10 02:52:24,830 INFO L87 Difference]: Start difference. First operand 665 states and 954 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 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) [2022-01-10 02:52:24,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:52:24,961 INFO L93 Difference]: Finished difference Result 980 states and 1308 transitions. [2022-01-10 02:52:24,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 02:52:24,961 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 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 36 [2022-01-10 02:52:24,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:52:24,964 INFO L225 Difference]: With dead ends: 980 [2022-01-10 02:52:24,964 INFO L226 Difference]: Without dead ends: 951 [2022-01-10 02:52:24,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 43 SyntacticMatches, 19 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-01-10 02:52:24,965 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 26 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:52:24,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 199 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 02:52:24,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2022-01-10 02:52:25,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 703. [2022-01-10 02:52:25,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 702 states have (on average 1.433048433048433) internal successors, (1006), 702 states have internal predecessors, (1006), 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) [2022-01-10 02:52:25,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 1006 transitions. [2022-01-10 02:52:25,002 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 1006 transitions. Word has length 36 [2022-01-10 02:52:25,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:52:25,002 INFO L470 AbstractCegarLoop]: Abstraction has 703 states and 1006 transitions. [2022-01-10 02:52:25,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 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) [2022-01-10 02:52:25,002 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 1006 transitions. [2022-01-10 02:52:25,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-10 02:52:25,004 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:52:25,004 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:52:25,011 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2022-01-10 02:52:25,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:52:25,207 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:52:25,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:52:25,207 INFO L85 PathProgramCache]: Analyzing trace with hash -2002054566, now seen corresponding path program 17 times [2022-01-10 02:52:25,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:52:25,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1484731243] [2022-01-10 02:52:25,207 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 02:52:25,208 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:52:25,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:52:25,208 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:52:25,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-01-10 02:52:25,261 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-10 02:52:25,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:52:25,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-10 02:52:25,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:52:25,391 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-01-10 02:52:25,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:52:25,545 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-01-10 02:52:25,545 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:52:25,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1484731243] [2022-01-10 02:52:25,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1484731243] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:52:25,545 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:52:25,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-01-10 02:52:25,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272751513] [2022-01-10 02:52:25,546 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:52:25,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-10 02:52:25,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:52:25,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-10 02:52:25,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2022-01-10 02:52:25,547 INFO L87 Difference]: Start difference. First operand 703 states and 1006 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 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) [2022-01-10 02:52:26,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:52:26,741 INFO L93 Difference]: Finished difference Result 2424 states and 3278 transitions. [2022-01-10 02:52:26,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-10 02:52:26,741 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 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 36 [2022-01-10 02:52:26,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:52:26,745 INFO L225 Difference]: With dead ends: 2424 [2022-01-10 02:52:26,746 INFO L226 Difference]: Without dead ends: 2072 [2022-01-10 02:52:26,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1016 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1096, Invalid=3064, Unknown=0, NotChecked=0, Total=4160 [2022-01-10 02:52:26,747 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 836 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 386 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 836 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 386 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 02:52:26,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [836 Valid, 465 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [386 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 02:52:26,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2072 states. [2022-01-10 02:52:26,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2072 to 822. [2022-01-10 02:52:26,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 822 states, 821 states have (on average 1.4275274056029232) internal successors, (1172), 821 states have internal predecessors, (1172), 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) [2022-01-10 02:52:26,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 1172 transitions. [2022-01-10 02:52:26,812 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 1172 transitions. Word has length 36 [2022-01-10 02:52:26,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:52:26,812 INFO L470 AbstractCegarLoop]: Abstraction has 822 states and 1172 transitions. [2022-01-10 02:52:26,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 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) [2022-01-10 02:52:26,812 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 1172 transitions. [2022-01-10 02:52:26,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-10 02:52:26,814 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:52:26,814 INFO L514 BasicCegarLoop]: trace histogram [16, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:52:26,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-01-10 02:52:27,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:52:27,023 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:52:27,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:52:27,023 INFO L85 PathProgramCache]: Analyzing trace with hash -41562944, now seen corresponding path program 18 times [2022-01-10 02:52:27,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:52:27,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1276955997] [2022-01-10 02:52:27,024 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-10 02:52:27,024 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:52:27,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:52:27,025 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:52:27,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-01-10 02:52:27,067 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-10 02:52:27,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:52:27,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 02:52:27,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:52:27,155 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-01-10 02:52:27,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:52:27,276 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-01-10 02:52:27,277 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:52:27,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1276955997] [2022-01-10 02:52:27,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1276955997] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:52:27,277 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:52:27,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-01-10 02:52:27,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505444841] [2022-01-10 02:52:27,277 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:52:27,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 02:52:27,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:52:27,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 02:52:27,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-01-10 02:52:27,278 INFO L87 Difference]: Start difference. First operand 822 states and 1172 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 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) [2022-01-10 02:52:27,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:52:27,592 INFO L93 Difference]: Finished difference Result 956 states and 1312 transitions. [2022-01-10 02:52:27,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-10 02:52:27,593 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 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 37 [2022-01-10 02:52:27,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:52:27,595 INFO L225 Difference]: With dead ends: 956 [2022-01-10 02:52:27,595 INFO L226 Difference]: Without dead ends: 922 [2022-01-10 02:52:27,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2022-01-10 02:52:27,597 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 45 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:52:27,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 111 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 02:52:27,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 922 states. [2022-01-10 02:52:27,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 922 to 759. [2022-01-10 02:52:27,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 758 states have (on average 1.403693931398417) internal successors, (1064), 758 states have internal predecessors, (1064), 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) [2022-01-10 02:52:27,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 1064 transitions. [2022-01-10 02:52:27,646 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 1064 transitions. Word has length 37 [2022-01-10 02:52:27,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:52:27,646 INFO L470 AbstractCegarLoop]: Abstraction has 759 states and 1064 transitions. [2022-01-10 02:52:27,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 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) [2022-01-10 02:52:27,646 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 1064 transitions. [2022-01-10 02:52:27,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-10 02:52:27,647 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:52:27,647 INFO L514 BasicCegarLoop]: trace histogram [8, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:52:27,656 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2022-01-10 02:52:27,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:52:27,856 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:52:27,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:52:27,856 INFO L85 PathProgramCache]: Analyzing trace with hash -741124294, now seen corresponding path program 19 times [2022-01-10 02:52:27,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:52:27,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [680928580] [2022-01-10 02:52:27,857 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-10 02:52:27,857 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:52:27,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:52:27,858 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:52:27,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-01-10 02:52:27,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:52:27,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-10 02:52:27,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:52:28,044 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 14 proven. 42 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-01-10 02:52:28,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:52:28,156 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 14 proven. 42 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-01-10 02:52:28,157 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:52:28,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [680928580] [2022-01-10 02:52:28,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [680928580] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:52:28,157 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:52:28,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2022-01-10 02:52:28,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499613669] [2022-01-10 02:52:28,157 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:52:28,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 02:52:28,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:52:28,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 02:52:28,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2022-01-10 02:52:28,158 INFO L87 Difference]: Start difference. First operand 759 states and 1064 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:52:29,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:52:29,149 INFO L93 Difference]: Finished difference Result 1081 states and 1424 transitions. [2022-01-10 02:52:29,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-10 02:52:29,149 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-01-10 02:52:29,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:52:29,151 INFO L225 Difference]: With dead ends: 1081 [2022-01-10 02:52:29,151 INFO L226 Difference]: Without dead ends: 1009 [2022-01-10 02:52:29,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 51 SyntacticMatches, 9 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=225, Invalid=3935, Unknown=0, NotChecked=0, Total=4160 [2022-01-10 02:52:29,152 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 83 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 1481 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 690 SdHoareTripleChecker+Invalid, 1599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 1481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-10 02:52:29,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 690 Invalid, 1599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 1481 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-10 02:52:29,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2022-01-10 02:52:29,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 714. [2022-01-10 02:52:29,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 714 states, 713 states have (on average 1.4137447405329593) internal successors, (1008), 713 states have internal predecessors, (1008), 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) [2022-01-10 02:52:29,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 1008 transitions. [2022-01-10 02:52:29,193 INFO L78 Accepts]: Start accepts. Automaton has 714 states and 1008 transitions. Word has length 38 [2022-01-10 02:52:29,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:52:29,193 INFO L470 AbstractCegarLoop]: Abstraction has 714 states and 1008 transitions. [2022-01-10 02:52:29,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:52:29,193 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states and 1008 transitions. [2022-01-10 02:52:29,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-10 02:52:29,194 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:52:29,195 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:52:29,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-01-10 02:52:29,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:52:29,404 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:52:29,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:52:29,404 INFO L85 PathProgramCache]: Analyzing trace with hash -545289396, now seen corresponding path program 20 times [2022-01-10 02:52:29,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:52:29,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1531616248] [2022-01-10 02:52:29,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 02:52:29,404 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:52:29,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:52:29,405 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:52:29,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-01-10 02:52:29,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 02:52:29,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:52:29,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-10 02:52:29,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:52:29,640 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-01-10 02:52:29,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:52:29,973 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-01-10 02:52:29,973 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:52:29,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1531616248] [2022-01-10 02:52:29,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1531616248] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:52:29,974 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:52:29,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2022-01-10 02:52:29,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733211772] [2022-01-10 02:52:29,974 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:52:29,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-10 02:52:29,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:52:29,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-10 02:52:29,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1061, Unknown=0, NotChecked=0, Total=1260 [2022-01-10 02:52:29,975 INFO L87 Difference]: Start difference. First operand 714 states and 1008 transitions. Second operand has 36 states, 36 states have (on average 1.3333333333333333) internal successors, (48), 36 states have internal predecessors, (48), 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)