/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 03:20:00,644 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 03:20:00,645 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 03:20:00,682 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 03:20:00,733 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 03:20:00,734 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 03:20:00,734 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 03:20:00,739 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 03:20:00,760 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 03:20:00,761 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 03:20:00,761 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 03:20:00,761 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 03:20:00,762 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 03:20:00,762 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 03:20:00,762 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 03:20:00,762 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 03:20:00,763 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 03:20:00,763 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 03:20:00,763 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 03:20:00,763 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 03:20:00,763 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 03:20:00,763 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 03:20:00,763 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 03:20:00,764 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 03:20:00,764 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 03:20:00,764 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 03:20:00,764 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 03:20:00,764 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 03:20:00,764 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 03:20:00,764 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 03:20:00,764 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 03:20:00,765 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 03:20:00,765 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 03:20:00,765 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 03:20:00,765 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 03:20:00,765 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 03:20:00,765 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 03:20:00,766 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 03:20:00,766 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 03:20:00,766 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 03:20:00,766 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 03:20:00,766 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 03:20:00,980 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 03:20:00,998 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 03:20:01,000 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 03:20:01,001 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 03:20:01,003 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 03:20:01,004 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound20.c [2022-01-10 03:20:01,056 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e4c4faf4/ed2116a560b54912a04b8c73ace17d63/FLAGb2ba8f5d8 [2022-01-10 03:20:01,402 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 03:20:01,403 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound20.c [2022-01-10 03:20:01,409 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e4c4faf4/ed2116a560b54912a04b8c73ace17d63/FLAGb2ba8f5d8 [2022-01-10 03:20:01,823 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e4c4faf4/ed2116a560b54912a04b8c73ace17d63 [2022-01-10 03:20:01,825 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 03:20:01,826 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 03:20:01,831 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 03:20:01,831 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 03:20:01,834 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 03:20:01,837 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:20:01" (1/1) ... [2022-01-10 03:20:01,838 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2703c6d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:20:01, skipping insertion in model container [2022-01-10 03:20:01,838 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:20:01" (1/1) ... [2022-01-10 03:20:01,842 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 03:20:01,853 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 03:20:01,973 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound20.c[537,550] [2022-01-10 03:20:02,010 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 03:20:02,018 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 03:20:02,034 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound20.c[537,550] [2022-01-10 03:20:02,039 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 03:20:02,050 INFO L208 MainTranslator]: Completed translation [2022-01-10 03:20:02,050 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:20:02 WrapperNode [2022-01-10 03:20:02,051 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 03:20:02,051 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 03:20:02,052 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 03:20:02,052 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 03:20:02,057 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:20:02" (1/1) ... [2022-01-10 03:20:02,063 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:20:02" (1/1) ... [2022-01-10 03:20:02,075 INFO L137 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 55 [2022-01-10 03:20:02,076 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 03:20:02,076 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 03:20:02,076 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 03:20:02,077 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 03:20:02,082 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:20:02" (1/1) ... [2022-01-10 03:20:02,083 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:20:02" (1/1) ... [2022-01-10 03:20:02,084 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:20:02" (1/1) ... [2022-01-10 03:20:02,084 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:20:02" (1/1) ... [2022-01-10 03:20:02,088 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:20:02" (1/1) ... [2022-01-10 03:20:02,091 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:20:02" (1/1) ... [2022-01-10 03:20:02,092 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:20:02" (1/1) ... [2022-01-10 03:20:02,093 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 03:20:02,094 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 03:20:02,094 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 03:20:02,094 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 03:20:02,095 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:20:02" (1/1) ... [2022-01-10 03:20:02,101 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 03:20:02,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 03:20:02,128 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 03:20:02,160 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 03:20:02,173 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 03:20:02,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 03:20:02,174 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-10 03:20:02,174 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-10 03:20:02,174 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 03:20:02,174 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 03:20:02,174 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-10 03:20:02,174 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-10 03:20:02,220 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 03:20:02,222 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 03:20:02,331 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 03:20:02,335 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 03:20:02,336 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-10 03:20:02,337 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:20:02 BoogieIcfgContainer [2022-01-10 03:20:02,337 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 03:20:02,338 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 03:20:02,338 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 03:20:02,349 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 03:20:02,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 03:20:01" (1/3) ... [2022-01-10 03:20:02,354 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7454e99b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:20:02, skipping insertion in model container [2022-01-10 03:20:02,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:20:02" (2/3) ... [2022-01-10 03:20:02,354 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7454e99b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:20:02, skipping insertion in model container [2022-01-10 03:20:02,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:20:02" (3/3) ... [2022-01-10 03:20:02,355 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_valuebound20.c [2022-01-10 03:20:02,359 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 03:20:02,359 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 03:20:02,433 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 03:20:02,438 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 03:20:02,439 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 03:20:02,470 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-10 03:20:02,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-10 03:20:02,475 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:20:02,475 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:20:02,476 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:20:02,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:20:02,481 INFO L85 PathProgramCache]: Analyzing trace with hash -487550744, now seen corresponding path program 1 times [2022-01-10 03:20:02,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:20:02,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [364567462] [2022-01-10 03:20:02,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:20:02,495 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:20:02,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:20:02,501 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 03:20:02,502 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 03:20:02,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:20:02,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-10 03:20:02,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:20:02,650 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 03:20:02,650 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:20:02,651 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:20:02,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [364567462] [2022-01-10 03:20:02,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [364567462] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:20:02,651 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:20:02,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 03:20:02,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872222555] [2022-01-10 03:20:02,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:20:02,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 03:20:02,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:20:02,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 03:20:02,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 03:20:02,680 INFO L87 Difference]: Start difference. First operand has 33 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-10 03:20:02,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:20:02,697 INFO L93 Difference]: Finished difference Result 63 states and 104 transitions. [2022-01-10 03:20:02,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 03:20:02,698 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-01-10 03:20:02,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:20:02,703 INFO L225 Difference]: With dead ends: 63 [2022-01-10 03:20:02,703 INFO L226 Difference]: Without dead ends: 29 [2022-01-10 03:20:02,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 23 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 03:20:02,708 INFO L933 BasicCegarLoop]: 43 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, 43 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 03:20:02,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 03:20:02,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-10 03:20:02,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-01-10 03:20:02,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-10 03:20:02,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2022-01-10 03:20:02,737 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 24 [2022-01-10 03:20:02,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:20:02,737 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2022-01-10 03:20:02,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-10 03:20:02,738 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2022-01-10 03:20:02,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-10 03:20:02,739 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:20:02,739 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:20:02,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-01-10 03:20:02,948 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 03:20:02,948 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:20:02,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:20:02,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1636258074, now seen corresponding path program 1 times [2022-01-10 03:20:02,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:20:02,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [135231650] [2022-01-10 03:20:02,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:20:02,950 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:20:02,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:20:02,952 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 03:20:02,953 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 03:20:02,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:20:02,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 03:20:02,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:20:03,090 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 03:20:03,091 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:20:03,091 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:20:03,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [135231650] [2022-01-10 03:20:03,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [135231650] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:20:03,092 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:20:03,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 03:20:03,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671401903] [2022-01-10 03:20:03,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:20:03,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 03:20:03,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:20:03,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 03:20:03,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 03:20:03,102 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-10 03:20:03,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:20:03,187 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2022-01-10 03:20:03,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 03:20:03,188 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2022-01-10 03:20:03,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:20:03,191 INFO L225 Difference]: With dead ends: 42 [2022-01-10 03:20:03,191 INFO L226 Difference]: Without dead ends: 40 [2022-01-10 03:20:03,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 03:20:03,192 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 11 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 03:20:03,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 135 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 03:20:03,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-01-10 03:20:03,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2022-01-10 03:20:03,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-10 03:20:03,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2022-01-10 03:20:03,206 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 24 [2022-01-10 03:20:03,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:20:03,207 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2022-01-10 03:20:03,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-10 03:20:03,207 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2022-01-10 03:20:03,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-10 03:20:03,208 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:20:03,208 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:20:03,221 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 03:20:03,418 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 03:20:03,419 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:20:03,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:20:03,420 INFO L85 PathProgramCache]: Analyzing trace with hash 906849917, now seen corresponding path program 1 times [2022-01-10 03:20:03,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:20:03,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1717951825] [2022-01-10 03:20:03,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:20:03,421 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:20:03,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:20:03,422 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 03:20:03,425 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 03:20:03,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:20:03,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 03:20:03,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:20:03,528 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 03:20:03,528 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:20:03,529 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:20:03,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1717951825] [2022-01-10 03:20:03,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1717951825] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:20:03,531 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:20:03,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 03:20:03,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468261339] [2022-01-10 03:20:03,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:20:03,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 03:20:03,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:20:03,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 03:20:03,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 03:20:03,537 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-10 03:20:03,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:20:03,626 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2022-01-10 03:20:03,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 03:20:03,629 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2022-01-10 03:20:03,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:20:03,630 INFO L225 Difference]: With dead ends: 46 [2022-01-10 03:20:03,630 INFO L226 Difference]: Without dead ends: 44 [2022-01-10 03:20:03,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 03:20:03,631 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 11 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 03:20:03,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 131 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 03:20:03,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-01-10 03:20:03,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2022-01-10 03:20:03,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-10 03:20:03,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2022-01-10 03:20:03,638 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 29 [2022-01-10 03:20:03,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:20:03,638 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2022-01-10 03:20:03,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-10 03:20:03,638 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2022-01-10 03:20:03,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-10 03:20:03,639 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:20:03,639 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:20:03,653 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 03:20:03,851 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 03:20:03,851 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:20:03,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:20:03,852 INFO L85 PathProgramCache]: Analyzing trace with hash 710995206, now seen corresponding path program 1 times [2022-01-10 03:20:03,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:20:03,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [122749586] [2022-01-10 03:20:03,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:20:03,853 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:20:03,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:20:03,855 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 03:20:03,857 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 03:20:03,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:20:03,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 03:20:03,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:20:04,100 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-10 03:20:04,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:20:04,373 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-10 03:20:04,373 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:20:04,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [122749586] [2022-01-10 03:20:04,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [122749586] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 03:20:04,374 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 03:20:04,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2022-01-10 03:20:04,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129830323] [2022-01-10 03:20:04,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:20:04,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 03:20:04,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:20:04,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 03:20:04,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-01-10 03:20:04,375 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 03:20:06,486 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 03:20:06,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:20:06,690 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2022-01-10 03:20:06,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 03:20:06,690 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2022-01-10 03:20:06,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:20:06,691 INFO L225 Difference]: With dead ends: 54 [2022-01-10 03:20:06,691 INFO L226 Difference]: Without dead ends: 52 [2022-01-10 03:20:06,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-01-10 03:20:06,693 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 7 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-01-10 03:20:06,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 137 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-01-10 03:20:06,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-01-10 03:20:06,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2022-01-10 03:20:06,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 30 states have internal predecessors, (33), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-01-10 03:20:06,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 62 transitions. [2022-01-10 03:20:06,701 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 62 transitions. Word has length 34 [2022-01-10 03:20:06,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:20:06,702 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 62 transitions. [2022-01-10 03:20:06,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 03:20:06,702 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 62 transitions. [2022-01-10 03:20:06,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-10 03:20:06,703 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:20:06,703 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 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 03:20:06,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-01-10 03:20:06,907 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 03:20:06,907 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:20:06,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:20:06,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1829555286, now seen corresponding path program 1 times [2022-01-10 03:20:06,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:20:06,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [431979786] [2022-01-10 03:20:06,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:20:06,908 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:20:06,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:20:06,909 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 03:20:06,911 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 03:20:06,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:20:06,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-10 03:20:06,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:20:07,211 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-10 03:20:07,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:20:07,709 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-10 03:20:07,709 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:20:07,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [431979786] [2022-01-10 03:20:07,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [431979786] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 03:20:07,709 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 03:20:07,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2022-01-10 03:20:07,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701620346] [2022-01-10 03:20:07,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:20:07,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 03:20:07,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:20:07,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 03:20:07,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-01-10 03:20:07,711 INFO L87 Difference]: Start difference. First operand 49 states and 62 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-10 03:20:08,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:20:08,004 INFO L93 Difference]: Finished difference Result 62 states and 79 transitions. [2022-01-10 03:20:08,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 03:20:08,006 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 41 [2022-01-10 03:20:08,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:20:08,008 INFO L225 Difference]: With dead ends: 62 [2022-01-10 03:20:08,009 INFO L226 Difference]: Without dead ends: 60 [2022-01-10 03:20:08,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-01-10 03:20:08,010 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 8 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 03:20:08,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 129 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 03:20:08,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-01-10 03:20:08,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2022-01-10 03:20:08,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 36 states have internal predecessors, (41), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-01-10 03:20:08,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 74 transitions. [2022-01-10 03:20:08,019 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 74 transitions. Word has length 41 [2022-01-10 03:20:08,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:20:08,019 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 74 transitions. [2022-01-10 03:20:08,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-10 03:20:08,019 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 74 transitions. [2022-01-10 03:20:08,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-10 03:20:08,020 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:20:08,021 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:20:08,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-01-10 03:20:08,229 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 03:20:08,229 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:20:08,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:20:08,230 INFO L85 PathProgramCache]: Analyzing trace with hash 105343995, now seen corresponding path program 1 times [2022-01-10 03:20:08,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:20:08,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1279962099] [2022-01-10 03:20:08,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:20:08,231 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:20:08,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:20:08,232 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 03:20:08,233 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 03:20:08,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:20:08,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 03:20:08,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:20:08,531 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-01-10 03:20:08,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:20:08,965 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-01-10 03:20:08,965 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:20:08,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1279962099] [2022-01-10 03:20:08,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1279962099] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 03:20:08,965 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 03:20:08,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 13 [2022-01-10 03:20:08,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969359141] [2022-01-10 03:20:08,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:20:08,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 03:20:08,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:20:08,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 03:20:08,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-01-10 03:20:08,968 INFO L87 Difference]: Start difference. First operand 58 states and 74 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-10 03:20:11,069 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 03:20:11,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:20:11,232 INFO L93 Difference]: Finished difference Result 70 states and 89 transitions. [2022-01-10 03:20:11,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 03:20:11,232 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 51 [2022-01-10 03:20:11,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:20:11,233 INFO L225 Difference]: With dead ends: 70 [2022-01-10 03:20:11,233 INFO L226 Difference]: Without dead ends: 68 [2022-01-10 03:20:11,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-01-10 03:20:11,235 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 10 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-10 03:20:11,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 124 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 37 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-01-10 03:20:11,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-01-10 03:20:11,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 53. [2022-01-10 03:20:11,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 32 states have (on average 1.1875) internal successors, (38), 34 states have internal predecessors, (38), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-01-10 03:20:11,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 65 transitions. [2022-01-10 03:20:11,244 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 65 transitions. Word has length 51 [2022-01-10 03:20:11,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:20:11,245 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 65 transitions. [2022-01-10 03:20:11,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-10 03:20:11,245 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 65 transitions. [2022-01-10 03:20:11,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-10 03:20:11,246 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:20:11,246 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 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 03:20:11,255 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 03:20:11,454 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 03:20:11,455 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:20:11,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:20:11,456 INFO L85 PathProgramCache]: Analyzing trace with hash 957489548, now seen corresponding path program 1 times [2022-01-10 03:20:11,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:20:11,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [309220704] [2022-01-10 03:20:11,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:20:11,456 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:20:11,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:20:11,457 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 03:20:11,458 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 03:20:11,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:20:11,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 03:20:11,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:20:11,706 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-01-10 03:20:11,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:20:11,943 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:20:11,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [309220704] [2022-01-10 03:20:11,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [309220704] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 03:20:11,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1383316945] [2022-01-10 03:20:11,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:20:11,943 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-01-10 03:20:11,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-01-10 03:20:11,945 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-01-10 03:20:11,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-01-10 03:20:12,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:20:12,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 03:20:12,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:20:12,500 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-10 03:20:12,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:20:13,085 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-10 03:20:13,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1383316945] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:20:13,085 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 03:20:13,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2022-01-10 03:20:13,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642123460] [2022-01-10 03:20:13,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 03:20:13,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-10 03:20:13,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:20:13,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-10 03:20:13,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-01-10 03:20:13,087 INFO L87 Difference]: Start difference. First operand 53 states and 65 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 5 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-01-10 03:20:14,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:20:14,070 INFO L93 Difference]: Finished difference Result 72 states and 92 transitions. [2022-01-10 03:20:14,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 03:20:14,071 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 5 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 52 [2022-01-10 03:20:14,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:20:14,072 INFO L225 Difference]: With dead ends: 72 [2022-01-10 03:20:14,072 INFO L226 Difference]: Without dead ends: 68 [2022-01-10 03:20:14,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 145 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-01-10 03:20:14,073 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 46 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 03:20:14,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 166 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-10 03:20:14,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-01-10 03:20:14,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2022-01-10 03:20:14,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 42 states have internal predecessors, (46), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2022-01-10 03:20:14,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 85 transitions. [2022-01-10 03:20:14,092 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 85 transitions. Word has length 52 [2022-01-10 03:20:14,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:20:14,093 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 85 transitions. [2022-01-10 03:20:14,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 5 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-01-10 03:20:14,093 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 85 transitions. [2022-01-10 03:20:14,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-10 03:20:14,096 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:20:14,096 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 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 03:20:14,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2022-01-10 03:20:14,304 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 03:20:14,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:20:14,498 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:20:14,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:20:14,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1397226472, now seen corresponding path program 1 times [2022-01-10 03:20:14,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:20:14,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [418168763] [2022-01-10 03:20:14,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:20:14,499 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:20:14,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:20:14,500 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 03:20:14,501 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 03:20:14,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:20:14,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 03:20:14,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:20:14,636 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-01-10 03:20:14,636 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:20:14,636 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:20:14,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [418168763] [2022-01-10 03:20:14,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [418168763] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:20:14,636 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:20:14,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 03:20:14,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371620651] [2022-01-10 03:20:14,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:20:14,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 03:20:14,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:20:14,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 03:20:14,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 03:20:14,638 INFO L87 Difference]: Start difference. First operand 67 states and 85 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 03:20:14,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:20:14,650 INFO L93 Difference]: Finished difference Result 94 states and 119 transitions. [2022-01-10 03:20:14,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 03:20:14,651 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), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 54 [2022-01-10 03:20:14,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:20:14,652 INFO L225 Difference]: With dead ends: 94 [2022-01-10 03:20:14,652 INFO L226 Difference]: Without dead ends: 63 [2022-01-10 03:20:14,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 52 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 03:20:14,653 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 03:20:14,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 75 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 03:20:14,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-01-10 03:20:14,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-01-10 03:20:14,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 37 states have (on average 1.162162162162162) internal successors, (43), 40 states have internal predecessors, (43), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2022-01-10 03:20:14,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 78 transitions. [2022-01-10 03:20:14,661 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 78 transitions. Word has length 54 [2022-01-10 03:20:14,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:20:14,661 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 78 transitions. [2022-01-10 03:20:14,661 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), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 03:20:14,661 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 78 transitions. [2022-01-10 03:20:14,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-10 03:20:14,662 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:20:14,662 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:20:14,678 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 03:20:14,871 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 03:20:14,872 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:20:14,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:20:14,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1754894755, now seen corresponding path program 1 times [2022-01-10 03:20:14,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:20:14,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1500163488] [2022-01-10 03:20:14,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:20:14,873 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:20:14,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:20:14,873 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 03:20:14,874 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 03:20:14,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:20:14,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-10 03:20:14,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:20:15,893 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-01-10 03:20:15,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:20:19,657 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-01-10 03:20:19,657 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:20:19,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1500163488] [2022-01-10 03:20:19,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1500163488] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:20:19,658 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:20:19,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 21 [2022-01-10 03:20:19,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956601471] [2022-01-10 03:20:19,658 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:20:19,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-10 03:20:19,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:20:19,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-10 03:20:19,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2022-01-10 03:20:19,660 INFO L87 Difference]: Start difference. First operand 63 states and 78 transitions. Second operand has 21 states, 20 states have (on average 1.8) internal successors, (36), 17 states have internal predecessors, (36), 11 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (22), 10 states have call predecessors, (22), 9 states have call successors, (22) [2022-01-10 03:20:23,456 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 03:20:29,679 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 03:20:32,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:20:32,114 INFO L93 Difference]: Finished difference Result 159 states and 217 transitions. [2022-01-10 03:20:32,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-10 03:20:32,117 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.8) internal successors, (36), 17 states have internal predecessors, (36), 11 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (22), 10 states have call predecessors, (22), 9 states have call successors, (22) Word has length 71 [2022-01-10 03:20:32,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:20:32,119 INFO L225 Difference]: With dead ends: 159 [2022-01-10 03:20:32,119 INFO L226 Difference]: Without dead ends: 132 [2022-01-10 03:20:32,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=165, Invalid=647, Unknown=0, NotChecked=0, Total=812 [2022-01-10 03:20:32,121 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 85 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 161 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2022-01-10 03:20:32,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 533 Invalid, 650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 487 Invalid, 2 Unknown, 0 Unchecked, 9.7s Time] [2022-01-10 03:20:32,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-01-10 03:20:32,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 109. [2022-01-10 03:20:32,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 64 states have (on average 1.203125) internal successors, (77), 67 states have internal predecessors, (77), 33 states have call successors, (33), 11 states have call predecessors, (33), 11 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) [2022-01-10 03:20:32,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 142 transitions. [2022-01-10 03:20:32,139 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 142 transitions. Word has length 71 [2022-01-10 03:20:32,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:20:32,139 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 142 transitions. [2022-01-10 03:20:32,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.8) internal successors, (36), 17 states have internal predecessors, (36), 11 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (22), 10 states have call predecessors, (22), 9 states have call successors, (22) [2022-01-10 03:20:32,140 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 142 transitions. [2022-01-10 03:20:32,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-10 03:20:32,140 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:20:32,141 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:20:32,149 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 03:20:32,345 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 03:20:32,346 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:20:32,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:20:32,346 INFO L85 PathProgramCache]: Analyzing trace with hash -2109273946, now seen corresponding path program 2 times [2022-01-10 03:20:32,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:20:32,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [360886744] [2022-01-10 03:20:32,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 03:20:32,346 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:20:32,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:20:32,347 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 03:20:32,348 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 03:20:32,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 03:20:32,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:20:32,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 03:20:32,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:20:32,737 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 21 proven. 11 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2022-01-10 03:20:32,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:20:33,583 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 21 proven. 11 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2022-01-10 03:20:33,583 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:20:33,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [360886744] [2022-01-10 03:20:33,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [360886744] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:20:33,584 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:20:33,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2022-01-10 03:20:33,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815282766] [2022-01-10 03:20:33,584 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:20:33,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 03:20:33,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:20:33,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 03:20:33,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-01-10 03:20:33,585 INFO L87 Difference]: Start difference. First operand 109 states and 142 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 12 states have internal predecessors, (37), 8 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) [2022-01-10 03:20:36,215 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 03:20:38,238 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 03:20:40,564 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 03:20:43,714 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 03:20:44,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:20:44,044 INFO L93 Difference]: Finished difference Result 164 states and 217 transitions. [2022-01-10 03:20:44,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-10 03:20:44,044 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 12 states have internal predecessors, (37), 8 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) Word has length 76 [2022-01-10 03:20:44,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:20:44,045 INFO L225 Difference]: With dead ends: 164 [2022-01-10 03:20:44,045 INFO L226 Difference]: Without dead ends: 138 [2022-01-10 03:20:44,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2022-01-10 03:20:44,047 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 67 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 88 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2022-01-10 03:20:44,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 428 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 289 Invalid, 4 Unknown, 0 Unchecked, 9.7s Time] [2022-01-10 03:20:44,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-01-10 03:20:44,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 134. [2022-01-10 03:20:44,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 79 states have (on average 1.1645569620253164) internal successors, (92), 83 states have internal predecessors, (92), 40 states have call successors, (40), 14 states have call predecessors, (40), 14 states have return successors, (38), 36 states have call predecessors, (38), 38 states have call successors, (38) [2022-01-10 03:20:44,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 170 transitions. [2022-01-10 03:20:44,067 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 170 transitions. Word has length 76 [2022-01-10 03:20:44,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:20:44,067 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 170 transitions. [2022-01-10 03:20:44,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 12 states have internal predecessors, (37), 8 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) [2022-01-10 03:20:44,067 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 170 transitions. [2022-01-10 03:20:44,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-10 03:20:44,068 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:20:44,068 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:20:44,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-01-10 03:20:44,279 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 03:20:44,279 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:20:44,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:20:44,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1620227847, now seen corresponding path program 1 times [2022-01-10 03:20:44,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:20:44,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [590121289] [2022-01-10 03:20:44,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:20:44,280 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:20:44,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:20:44,281 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 03:20:44,281 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 03:20:44,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:20:44,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 03:20:44,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:20:45,008 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 65 proven. 27 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2022-01-10 03:20:45,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:20:46,524 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:20:46,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [590121289] [2022-01-10 03:20:46,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [590121289] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 03:20:46,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [567894466] [2022-01-10 03:20:46,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:20:46,525 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-01-10 03:20:46,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-01-10 03:20:46,526 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-01-10 03:20:46,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2022-01-10 03:20:46,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:20:46,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-10 03:20:46,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:20:47,413 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 65 proven. 27 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2022-01-10 03:20:47,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:21:09,094 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 65 proven. 27 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2022-01-10 03:21:09,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [567894466] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:21:09,095 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 03:21:09,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 25 [2022-01-10 03:21:09,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922921490] [2022-01-10 03:21:09,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 03:21:09,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-10 03:21:09,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:21:09,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-10 03:21:09,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=537, Unknown=4, NotChecked=0, Total=650 [2022-01-10 03:21:09,097 INFO L87 Difference]: Start difference. First operand 134 states and 170 transitions. Second operand has 25 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 20 states have internal predecessors, (48), 15 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (33), 15 states have call predecessors, (33), 13 states have call successors, (33)