/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/array-examples/standard_copy5_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 03:36:37,567 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 03:36:37,568 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 03:36:37,588 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 03:36:37,636 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf [2022-01-10 03:36:37,649 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 03:36:37,649 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 03:36:37,650 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 03:36:37,650 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 03:36:37,650 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 03:36:37,650 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 03:36:37,651 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 03:36:37,651 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 03:36:37,651 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 03:36:37,651 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 03:36:37,651 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 03:36:37,651 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 03:36:37,651 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 03:36:37,651 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 03:36:37,651 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 03:36:37,652 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 03:36:37,652 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 03:36:37,652 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 03:36:37,652 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 03:36:37,652 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 03:36:37,652 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 03:36:37,652 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 03:36:37,652 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 03:36:37,652 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 03:36:37,653 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 03:36:37,653 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 03:36:37,653 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 03:36:37,653 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 03:36:37,653 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 03:36:37,653 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 03:36:37,653 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 03:36:37,653 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 03:36:37,653 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 03:36:37,653 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 03:36:37,836 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 03:36:37,854 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 03:36:37,855 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 03:36:37,856 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 03:36:37,858 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 03:36:37,858 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy5_ground-2.i [2022-01-10 03:36:37,901 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2a4d996c/a74dd3438c3745bb80958f860de5c8c9/FLAGac6fdbcd2 [2022-01-10 03:36:38,270 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 03:36:38,271 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy5_ground-2.i [2022-01-10 03:36:38,274 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2a4d996c/a74dd3438c3745bb80958f860de5c8c9/FLAGac6fdbcd2 [2022-01-10 03:36:38,283 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2a4d996c/a74dd3438c3745bb80958f860de5c8c9 [2022-01-10 03:36:38,285 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 03:36:38,287 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 03:36:38,290 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 03:36:38,290 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 03:36:38,293 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 03:36:38,293 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:36:38" (1/1) ... [2022-01-10 03:36:38,294 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7131a4f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:36:38, skipping insertion in model container [2022-01-10 03:36:38,294 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:36:38" (1/1) ... [2022-01-10 03:36:38,298 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 03:36:38,311 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 03:36:38,451 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy5_ground-2.i[816,829] [2022-01-10 03:36:38,479 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 03:36:38,485 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 03:36:38,494 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy5_ground-2.i[816,829] [2022-01-10 03:36:38,520 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 03:36:38,534 INFO L208 MainTranslator]: Completed translation [2022-01-10 03:36:38,535 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:36:38 WrapperNode [2022-01-10 03:36:38,535 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 03:36:38,535 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 03:36:38,536 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 03:36:38,536 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 03:36:38,541 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:36:38" (1/1) ... [2022-01-10 03:36:38,554 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:36:38" (1/1) ... [2022-01-10 03:36:38,575 INFO L137 Inliner]: procedures = 18, calls = 39, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 129 [2022-01-10 03:36:38,575 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 03:36:38,575 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 03:36:38,575 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 03:36:38,576 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 03:36:38,581 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:36:38" (1/1) ... [2022-01-10 03:36:38,581 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:36:38" (1/1) ... [2022-01-10 03:36:38,586 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:36:38" (1/1) ... [2022-01-10 03:36:38,586 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:36:38" (1/1) ... [2022-01-10 03:36:38,603 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:36:38" (1/1) ... [2022-01-10 03:36:38,606 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:36:38" (1/1) ... [2022-01-10 03:36:38,607 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:36:38" (1/1) ... [2022-01-10 03:36:38,608 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 03:36:38,609 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 03:36:38,609 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 03:36:38,609 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 03:36:38,611 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:36:38" (1/1) ... [2022-01-10 03:36:38,625 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 03:36:38,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 03:36:38,641 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-10 03:36:38,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-10 03:36:38,668 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 03:36:38,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 03:36:38,669 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-10 03:36:38,669 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-01-10 03:36:38,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 03:36:38,669 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 03:36:38,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-10 03:36:38,669 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-01-10 03:36:38,731 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 03:36:38,732 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 03:36:38,925 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 03:36:38,929 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 03:36:38,929 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2022-01-10 03:36:38,930 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:36:38 BoogieIcfgContainer [2022-01-10 03:36:38,930 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 03:36:38,931 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 03:36:38,931 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 03:36:38,933 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 03:36:38,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 03:36:38" (1/3) ... [2022-01-10 03:36:38,934 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3abbaf1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:36:38, skipping insertion in model container [2022-01-10 03:36:38,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:36:38" (2/3) ... [2022-01-10 03:36:38,934 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3abbaf1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:36:38, skipping insertion in model container [2022-01-10 03:36:38,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:36:38" (3/3) ... [2022-01-10 03:36:38,935 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy5_ground-2.i [2022-01-10 03:36:38,938 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 03:36:38,938 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 03:36:38,974 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 03:36:38,981 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-10 03:36:38,981 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 03:36:38,991 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 29 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 03:36:38,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-10 03:36:38,995 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:36:38,995 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:36:38,996 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:36:38,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:36:38,999 INFO L85 PathProgramCache]: Analyzing trace with hash -18882701, now seen corresponding path program 1 times [2022-01-10 03:36:39,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:36:39,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1556916836] [2022-01-10 03:36:39,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:36:39,007 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:36:39,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:36:39,010 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:36:39,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-01-10 03:36:39,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:36:39,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-10 03:36:39,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:36:39,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 03:36:39,192 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:36:39,193 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:36:39,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1556916836] [2022-01-10 03:36:39,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1556916836] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:36:39,193 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:36:39,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 03:36:39,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876616374] [2022-01-10 03:36:39,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:36:39,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 03:36:39,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:36:39,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 03:36:39,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 03:36:39,215 INFO L87 Difference]: Start difference. First operand has 30 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 29 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) Second operand has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:36:39,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:36:39,229 INFO L93 Difference]: Finished difference Result 56 states and 82 transitions. [2022-01-10 03:36:39,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 03:36:39,232 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-10 03:36:39,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:36:39,243 INFO L225 Difference]: With dead ends: 56 [2022-01-10 03:36:39,243 INFO L226 Difference]: Without dead ends: 26 [2022-01-10 03:36:39,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 03:36:39,249 INFO L933 BasicCegarLoop]: 36 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, 36 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 03:36:39,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 03:36:39,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-01-10 03:36:39,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-01-10 03:36:39,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 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 03:36:39,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2022-01-10 03:36:39,274 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 17 [2022-01-10 03:36:39,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:36:39,275 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2022-01-10 03:36:39,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:36:39,275 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2022-01-10 03:36:39,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-10 03:36:39,276 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:36:39,276 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:36:39,284 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-01-10 03:36:39,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:36:39,482 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:36:39,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:36:39,483 INFO L85 PathProgramCache]: Analyzing trace with hash -24423827, now seen corresponding path program 1 times [2022-01-10 03:36:39,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:36:39,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [642029496] [2022-01-10 03:36:39,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:36:39,484 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:36:39,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:36:39,485 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:36:39,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-01-10 03:36:39,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:36:39,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 03:36:39,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:36:39,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 03:36:39,609 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:36:39,609 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:36:39,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [642029496] [2022-01-10 03:36:39,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [642029496] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:36:39,610 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:36:39,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 03:36:39,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599248974] [2022-01-10 03:36:39,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:36:39,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 03:36:39,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:36:39,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 03:36:39,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 03:36:39,614 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:36:39,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:36:39,632 INFO L93 Difference]: Finished difference Result 50 states and 62 transitions. [2022-01-10 03:36:39,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 03:36:39,633 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-10 03:36:39,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:36:39,633 INFO L225 Difference]: With dead ends: 50 [2022-01-10 03:36:39,633 INFO L226 Difference]: Without dead ends: 28 [2022-01-10 03:36:39,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 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 03:36:39,634 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 1 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 03:36:39,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 58 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 03:36:39,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-10 03:36:39,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-01-10 03:36:39,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 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 03:36:39,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2022-01-10 03:36:39,638 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 17 [2022-01-10 03:36:39,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:36:39,638 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2022-01-10 03:36:39,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:36:39,638 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2022-01-10 03:36:39,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-10 03:36:39,639 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:36:39,639 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:36:39,661 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 03:36:39,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:36:39,846 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:36:39,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:36:39,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1592499797, now seen corresponding path program 1 times [2022-01-10 03:36:39,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:36:39,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1592128653] [2022-01-10 03:36:39,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:36:39,847 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:36:39,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:36:39,848 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:36:39,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-01-10 03:36:39,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:36:39,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 03:36:39,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:36:39,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 03:36:39,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:36:40,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 03:36:40,007 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:36:40,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1592128653] [2022-01-10 03:36:40,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1592128653] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:36:40,009 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:36:40,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-10 03:36:40,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64841603] [2022-01-10 03:36:40,010 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:36:40,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 03:36:40,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:36:40,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 03:36:40,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 03:36:40,012 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 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 03:36:40,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:36:40,065 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2022-01-10 03:36:40,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 03:36:40,066 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 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 19 [2022-01-10 03:36:40,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:36:40,067 INFO L225 Difference]: With dead ends: 55 [2022-01-10 03:36:40,067 INFO L226 Difference]: Without dead ends: 33 [2022-01-10 03:36:40,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-01-10 03:36:40,068 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 5 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 03:36:40,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 86 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 03:36:40,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-01-10 03:36:40,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-01-10 03:36:40,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.21875) internal successors, (39), 32 states have internal predecessors, (39), 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 03:36:40,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2022-01-10 03:36:40,073 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 19 [2022-01-10 03:36:40,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:36:40,074 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2022-01-10 03:36:40,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 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 03:36:40,074 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2022-01-10 03:36:40,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-10 03:36:40,075 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:36:40,075 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:36:40,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-01-10 03:36:40,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:36:40,276 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:36:40,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:36:40,276 INFO L85 PathProgramCache]: Analyzing trace with hash -143785371, now seen corresponding path program 2 times [2022-01-10 03:36:40,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:36:40,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1205687106] [2022-01-10 03:36:40,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 03:36:40,277 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:36:40,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:36:40,278 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:36:40,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-01-10 03:36:40,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-01-10 03:36:40,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:36:40,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 03:36:40,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:36:40,363 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-10 03:36:40,363 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:36:40,363 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:36:40,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1205687106] [2022-01-10 03:36:40,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1205687106] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:36:40,364 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:36:40,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 03:36:40,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678002790] [2022-01-10 03:36:40,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:36:40,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 03:36:40,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:36:40,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 03:36:40,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 03:36:40,365 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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 03:36:40,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:36:40,441 INFO L93 Difference]: Finished difference Result 62 states and 77 transitions. [2022-01-10 03:36:40,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 03:36:40,442 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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 03:36:40,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:36:40,442 INFO L225 Difference]: With dead ends: 62 [2022-01-10 03:36:40,443 INFO L226 Difference]: Without dead ends: 43 [2022-01-10 03:36:40,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 23 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 03:36:40,444 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 5 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 03:36:40,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 33 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 03:36:40,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-01-10 03:36:40,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2022-01-10 03:36:40,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 37 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 03:36:40,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2022-01-10 03:36:40,453 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 25 [2022-01-10 03:36:40,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:36:40,453 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2022-01-10 03:36:40,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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 03:36:40,453 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2022-01-10 03:36:40,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-10 03:36:40,455 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:36:40,455 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:36:40,464 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-01-10 03:36:40,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:36:40,664 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:36:40,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:36:40,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1141885403, now seen corresponding path program 1 times [2022-01-10 03:36:40,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:36:40,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2018161543] [2022-01-10 03:36:40,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:36:40,665 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:36:40,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:36:40,666 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:36:40,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-01-10 03:36:40,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:36:40,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 03:36:40,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:36:40,859 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 03:36:40,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:36:41,004 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 03:36:41,014 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:36:41,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2018161543] [2022-01-10 03:36:41,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2018161543] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:36:41,015 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:36:41,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-01-10 03:36:41,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797826101] [2022-01-10 03:36:41,015 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:36:41,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 03:36:41,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:36:41,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 03:36:41,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-01-10 03:36:41,016 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 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 03:36:41,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:36:41,257 INFO L93 Difference]: Finished difference Result 77 states and 94 transitions. [2022-01-10 03:36:41,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 03:36:41,263 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 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 03:36:41,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:36:41,264 INFO L225 Difference]: With dead ends: 77 [2022-01-10 03:36:41,264 INFO L226 Difference]: Without dead ends: 50 [2022-01-10 03:36:41,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2022-01-10 03:36:41,265 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 10 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 03:36:41,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 226 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 03:36:41,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-01-10 03:36:41,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-01-10 03:36:41,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 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 03:36:41,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2022-01-10 03:36:41,270 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 35 [2022-01-10 03:36:41,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:36:41,270 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2022-01-10 03:36:41,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 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 03:36:41,270 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2022-01-10 03:36:41,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-10 03:36:41,273 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:36:41,274 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:36:41,281 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-01-10 03:36:41,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:36:41,481 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:36:41,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:36:41,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1811959857, now seen corresponding path program 2 times [2022-01-10 03:36:41,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:36:41,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1609928111] [2022-01-10 03:36:41,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 03:36:41,482 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:36:41,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:36:41,483 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:36:41,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-01-10 03:36:41,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 03:36:41,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:36:41,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 03:36:41,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:36:41,810 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 03:36:41,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:36:42,151 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 03:36:42,151 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:36:42,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1609928111] [2022-01-10 03:36:42,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1609928111] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:36:42,151 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:36:42,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-01-10 03:36:42,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456723584] [2022-01-10 03:36:42,152 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:36:42,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-10 03:36:42,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:36:42,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-10 03:36:42,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-01-10 03:36:42,153 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand has 24 states, 24 states have (on average 2.875) internal successors, (69), 24 states have internal predecessors, (69), 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 03:36:43,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:36:43,172 INFO L93 Difference]: Finished difference Result 101 states and 124 transitions. [2022-01-10 03:36:43,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-10 03:36:43,182 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.875) internal successors, (69), 24 states have internal predecessors, (69), 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 47 [2022-01-10 03:36:43,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:36:43,186 INFO L225 Difference]: With dead ends: 101 [2022-01-10 03:36:43,186 INFO L226 Difference]: Without dead ends: 74 [2022-01-10 03:36:43,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=406, Invalid=716, Unknown=0, NotChecked=0, Total=1122 [2022-01-10 03:36:43,190 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 22 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 03:36:43,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 366 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 03:36:43,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-01-10 03:36:43,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-01-10 03:36:43,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.095890410958904) internal successors, (80), 73 states have internal predecessors, (80), 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 03:36:43,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 80 transitions. [2022-01-10 03:36:43,199 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 80 transitions. Word has length 47 [2022-01-10 03:36:43,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:36:43,199 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 80 transitions. [2022-01-10 03:36:43,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.875) internal successors, (69), 24 states have internal predecessors, (69), 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 03:36:43,200 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 80 transitions. [2022-01-10 03:36:43,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-10 03:36:43,201 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:36:43,201 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:36:43,223 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-01-10 03:36:43,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:36:43,413 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:36:43,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:36:43,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1694273975, now seen corresponding path program 3 times [2022-01-10 03:36:43,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:36:43,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1460495546] [2022-01-10 03:36:43,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 03:36:43,414 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:36:43,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:36:43,415 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:36:43,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-01-10 03:36:43,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-10 03:36:43,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:36:43,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 03:36:43,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:36:43,673 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 488 trivial. 0 not checked. [2022-01-10 03:36:43,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:36:43,755 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 488 trivial. 0 not checked. [2022-01-10 03:36:43,755 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:36:43,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1460495546] [2022-01-10 03:36:43,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1460495546] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:36:43,756 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:36:43,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-10 03:36:43,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050323231] [2022-01-10 03:36:43,756 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:36:43,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 03:36:43,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:36:43,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 03:36:43,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 03:36:43,757 INFO L87 Difference]: Start difference. First operand 74 states and 80 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 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 03:36:43,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:36:43,918 INFO L93 Difference]: Finished difference Result 127 states and 152 transitions. [2022-01-10 03:36:43,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 03:36:43,919 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 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) Word has length 71 [2022-01-10 03:36:43,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:36:43,920 INFO L225 Difference]: With dead ends: 127 [2022-01-10 03:36:43,920 INFO L226 Difference]: Without dead ends: 104 [2022-01-10 03:36:43,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-01-10 03:36:43,924 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 29 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 03:36:43,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 55 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 03:36:43,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-01-10 03:36:43,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2022-01-10 03:36:43,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.0679611650485437) internal successors, (110), 103 states have internal predecessors, (110), 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 03:36:43,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 110 transitions. [2022-01-10 03:36:43,930 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 110 transitions. Word has length 71 [2022-01-10 03:36:43,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:36:43,931 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 110 transitions. [2022-01-10 03:36:43,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 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 03:36:43,931 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 110 transitions. [2022-01-10 03:36:43,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-01-10 03:36:43,932 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:36:43,933 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:36:43,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-01-10 03:36:44,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:36:44,140 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:36:44,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:36:44,141 INFO L85 PathProgramCache]: Analyzing trace with hash 14916121, now seen corresponding path program 4 times [2022-01-10 03:36:44,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:36:44,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1360925490] [2022-01-10 03:36:44,141 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 03:36:44,141 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:36:44,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:36:44,142 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 03:36:44,156 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 03:36:44,388 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 03:36:44,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:36:44,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-10 03:36:44,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:36:44,776 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-01-10 03:36:44,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:36:46,016 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-01-10 03:36:46,016 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:36:46,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1360925490] [2022-01-10 03:36:46,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1360925490] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:36:46,017 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:36:46,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2022-01-10 03:36:46,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876574595] [2022-01-10 03:36:46,017 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:36:46,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-10 03:36:46,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:36:46,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-10 03:36:46,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=622, Invalid=1634, Unknown=0, NotChecked=0, Total=2256 [2022-01-10 03:36:46,020 INFO L87 Difference]: Start difference. First operand 104 states and 110 transitions. Second operand has 48 states, 48 states have (on average 2.4375) internal successors, (117), 48 states have internal predecessors, (117), 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 03:36:51,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:36:51,838 INFO L93 Difference]: Finished difference Result 209 states and 244 transitions. [2022-01-10 03:36:51,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-10 03:36:51,839 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.4375) internal successors, (117), 48 states have internal predecessors, (117), 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 101 [2022-01-10 03:36:51,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:36:51,840 INFO L225 Difference]: With dead ends: 209 [2022-01-10 03:36:51,840 INFO L226 Difference]: Without dead ends: 152 [2022-01-10 03:36:51,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=1678, Invalid=3152, Unknown=0, NotChecked=0, Total=4830 [2022-01-10 03:36:51,842 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 47 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 1149 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 674 SdHoareTripleChecker+Invalid, 1195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-10 03:36:51,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 674 Invalid, 1195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1149 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-10 03:36:51,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-01-10 03:36:51,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2022-01-10 03:36:51,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.0463576158940397) internal successors, (158), 151 states have internal predecessors, (158), 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 03:36:51,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 158 transitions. [2022-01-10 03:36:51,856 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 158 transitions. Word has length 101 [2022-01-10 03:36:51,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:36:51,856 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 158 transitions. [2022-01-10 03:36:51,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.4375) internal successors, (117), 48 states have internal predecessors, (117), 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 03:36:51,856 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 158 transitions. [2022-01-10 03:36:51,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-01-10 03:36:51,859 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:36:51,859 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:36:51,873 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 03:36:52,070 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 03:36:52,071 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:36:52,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:36:52,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1142893033, now seen corresponding path program 5 times [2022-01-10 03:36:52,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:36:52,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1725644303] [2022-01-10 03:36:52,072 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 03:36:52,072 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:36:52,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:36:52,073 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 03:36:52,074 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 03:36:55,828 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2022-01-10 03:36:55,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:36:55,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 03:36:55,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:36:56,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2196 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2180 trivial. 0 not checked. [2022-01-10 03:36:56,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:36:56,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2196 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2180 trivial. 0 not checked. [2022-01-10 03:36:56,237 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:36:56,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1725644303] [2022-01-10 03:36:56,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1725644303] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:36:56,237 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:36:56,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-01-10 03:36:56,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194163079] [2022-01-10 03:36:56,238 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:36:56,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 03:36:56,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:36:56,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 03:36:56,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-01-10 03:36:56,239 INFO L87 Difference]: Start difference. First operand 152 states and 158 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 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 03:36:56,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:36:56,894 INFO L93 Difference]: Finished difference Result 259 states and 299 transitions. [2022-01-10 03:36:56,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 03:36:56,895 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 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 149 [2022-01-10 03:36:56,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:36:56,896 INFO L225 Difference]: With dead ends: 259 [2022-01-10 03:36:56,896 INFO L226 Difference]: Without dead ends: 212 [2022-01-10 03:36:56,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2022-01-10 03:36:56,897 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 134 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 03:36:56,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 99 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-10 03:36:56,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-01-10 03:36:56,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2022-01-10 03:36:56,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 1.033175355450237) internal successors, (218), 211 states have internal predecessors, (218), 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 03:36:56,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 218 transitions. [2022-01-10 03:36:56,911 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 218 transitions. Word has length 149 [2022-01-10 03:36:56,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:36:56,913 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 218 transitions. [2022-01-10 03:36:56,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 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 03:36:56,913 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 218 transitions. [2022-01-10 03:36:56,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-01-10 03:36:56,919 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:36:56,919 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:36:56,945 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 03:36:57,142 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 03:36:57,143 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:36:57,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:36:57,143 INFO L85 PathProgramCache]: Analyzing trace with hash -2005697491, now seen corresponding path program 6 times [2022-01-10 03:36:57,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:36:57,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2006069873] [2022-01-10 03:36:57,144 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-10 03:36:57,144 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:36:57,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:36:57,147 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 03:36:57,167 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 03:37:00,410 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2022-01-10 03:37:00,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:37:00,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 03:37:00,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:37:00,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2616 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2516 trivial. 0 not checked. [2022-01-10 03:37:00,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:37:01,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2616 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2516 trivial. 0 not checked. [2022-01-10 03:37:01,206 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:37:01,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2006069873] [2022-01-10 03:37:01,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2006069873] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:37:01,206 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:37:01,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-01-10 03:37:01,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536405023] [2022-01-10 03:37:01,207 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:37:01,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-10 03:37:01,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:37:01,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-10 03:37:01,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-01-10 03:37:01,208 INFO L87 Difference]: Start difference. First operand 212 states and 218 transitions. Second operand has 24 states, 24 states have (on average 2.875) internal successors, (69), 24 states have internal predecessors, (69), 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 03:37:03,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:37:03,682 INFO L93 Difference]: Finished difference Result 427 states and 497 transitions. [2022-01-10 03:37:03,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-10 03:37:03,683 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.875) internal successors, (69), 24 states have internal predecessors, (69), 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 209 [2022-01-10 03:37:03,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:37:03,684 INFO L225 Difference]: With dead ends: 427 [2022-01-10 03:37:03,684 INFO L226 Difference]: Without dead ends: 332 [2022-01-10 03:37:03,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 404 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=406, Invalid=716, Unknown=0, NotChecked=0, Total=1122 [2022-01-10 03:37:03,685 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 579 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 1442 mSolverCounterSat, 630 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 579 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 2072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 630 IncrementalHoareTripleChecker+Valid, 1442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-10 03:37:03,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [579 Valid, 154 Invalid, 2072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [630 Valid, 1442 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-01-10 03:37:03,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-01-10 03:37:03,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 332. [2022-01-10 03:37:03,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 1.0211480362537764) internal successors, (338), 331 states have internal predecessors, (338), 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 03:37:03,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 338 transitions. [2022-01-10 03:37:03,702 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 338 transitions. Word has length 209 [2022-01-10 03:37:03,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:37:03,702 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 338 transitions. [2022-01-10 03:37:03,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.875) internal successors, (69), 24 states have internal predecessors, (69), 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 03:37:03,702 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 338 transitions. [2022-01-10 03:37:03,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2022-01-10 03:37:03,713 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:37:03,713 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:37:03,733 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 03:37:03,913 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 03:37:03,914 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:37:03,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:37:03,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1993537867, now seen corresponding path program 7 times [2022-01-10 03:37:03,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:37:03,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [256033587] [2022-01-10 03:37:03,915 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-10 03:37:03,915 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:37:03,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:37:03,916 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 03:37:03,916 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 03:37:04,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:37:04,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 1049 conjuncts, 48 conjunts are in the unsatisfiable core [2022-01-10 03:37:04,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:37:05,854 INFO L134 CoverageAnalysis]: Checked inductivity of 4536 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 2420 trivial. 0 not checked. [2022-01-10 03:37:05,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:37:10,545 INFO L134 CoverageAnalysis]: Checked inductivity of 4536 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 2420 trivial. 0 not checked. [2022-01-10 03:37:10,546 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:37:10,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [256033587] [2022-01-10 03:37:10,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [256033587] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:37:10,546 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:37:10,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 96 [2022-01-10 03:37:10,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398292666] [2022-01-10 03:37:10,546 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:37:10,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-01-10 03:37:10,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:37:10,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-01-10 03:37:10,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2398, Invalid=6722, Unknown=0, NotChecked=0, Total=9120 [2022-01-10 03:37:10,549 INFO L87 Difference]: Start difference. First operand 332 states and 338 transitions. Second operand has 96 states, 96 states have (on average 2.21875) internal successors, (213), 96 states have internal predecessors, (213), 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 03:37:53,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:37:53,566 INFO L93 Difference]: Finished difference Result 665 states and 724 transitions. [2022-01-10 03:37:53,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-01-10 03:37:53,568 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.21875) internal successors, (213), 96 states have internal predecessors, (213), 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 329 [2022-01-10 03:37:53,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:37:53,569 INFO L225 Difference]: With dead ends: 665 [2022-01-10 03:37:53,570 INFO L226 Difference]: Without dead ends: 428 [2022-01-10 03:37:53,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 702 GetRequests, 562 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 43.7s TimeCoverageRelationStatistics Valid=6814, Invalid=13208, Unknown=0, NotChecked=0, Total=20022 [2022-01-10 03:37:53,576 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 94 mSDsluCounter, 1372 mSDsCounter, 0 mSdLazyCounter, 4607 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 1402 SdHoareTripleChecker+Invalid, 4701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 4607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-01-10 03:37:53,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 1402 Invalid, 4701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 4607 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-01-10 03:37:53,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2022-01-10 03:37:53,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 428. [2022-01-10 03:37:53,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 1.0163934426229508) internal successors, (434), 427 states have internal predecessors, (434), 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 03:37:53,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 434 transitions. [2022-01-10 03:37:53,589 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 434 transitions. Word has length 329 [2022-01-10 03:37:53,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:37:53,589 INFO L470 AbstractCegarLoop]: Abstraction has 428 states and 434 transitions. [2022-01-10 03:37:53,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.21875) internal successors, (213), 96 states have internal predecessors, (213), 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 03:37:53,590 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 434 transitions. [2022-01-10 03:37:53,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2022-01-10 03:37:53,593 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:37:53,593 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:37:53,621 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-01-10 03:37:53,807 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 03:37:53,807 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:37:53,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:37:53,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1786710443, now seen corresponding path program 8 times [2022-01-10 03:37:53,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:37:53,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1307102637] [2022-01-10 03:37:53,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 03:37:53,809 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:37:53,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:37:53,810 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 03:37:53,810 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 03:37:55,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 03:37:55,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:37:55,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 1481 conjuncts, 96 conjunts are in the unsatisfiable core [2022-01-10 03:37:55,201 INFO L286 TraceCheckSpWp]: Computing forward predicates...