/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/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/verifythis/prefixsum_iter.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-15 02:22:07,954 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-15 02:22:07,984 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-15 02:22:08,009 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-15 02:22:08,024 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-15 02:22:08,025 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-15 02:22:08,026 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-15 02:22:08,028 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-15 02:22:08,029 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-15 02:22:08,029 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-15 02:22:08,030 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-15 02:22:08,034 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-15 02:22:08,035 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-15 02:22:08,036 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-15 02:22:08,037 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-15 02:22:08,037 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-15 02:22:08,042 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-15 02:22:08,048 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-15 02:22:08,048 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-15 02:22:08,049 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-15 02:22:08,050 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-02-15 02:22:08,058 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-15 02:22:08,058 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-15 02:22:08,059 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-15 02:22:08,059 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-15 02:22:08,060 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-15 02:22:08,060 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-15 02:22:08,060 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-15 02:22:08,060 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-15 02:22:08,060 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-15 02:22:08,060 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-15 02:22:08,060 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-15 02:22:08,061 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-15 02:22:08,061 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-15 02:22:08,061 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-15 02:22:08,061 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-15 02:22:08,061 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-15 02:22:08,061 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-15 02:22:08,061 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-15 02:22:08,061 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 02:22:08,061 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-15 02:22:08,061 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-15 02:22:08,062 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-15 02:22:08,062 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-02-15 02:22:08,062 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-15 02:22:08,254 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-15 02:22:08,274 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-15 02:22:08,276 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-15 02:22:08,276 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-15 02:22:08,278 INFO L275 PluginConnector]: CDTParser initialized [2022-02-15 02:22:08,279 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/prefixsum_iter.c [2022-02-15 02:22:08,319 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/11d313326/d02beadb049845758b290dde782534d1/FLAG680ceee05 [2022-02-15 02:22:08,671 INFO L306 CDTParser]: Found 1 translation units. [2022-02-15 02:22:08,672 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/verifythis/prefixsum_iter.c [2022-02-15 02:22:08,678 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/11d313326/d02beadb049845758b290dde782534d1/FLAG680ceee05 [2022-02-15 02:22:08,691 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/11d313326/d02beadb049845758b290dde782534d1 [2022-02-15 02:22:08,693 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-15 02:22:08,694 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-15 02:22:08,698 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-15 02:22:08,698 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-15 02:22:08,700 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-15 02:22:08,701 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 02:22:08" (1/1) ... [2022-02-15 02:22:08,702 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e6d214d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:22:08, skipping insertion in model container [2022-02-15 02:22:08,702 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 02:22:08" (1/1) ... [2022-02-15 02:22:08,708 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-15 02:22:08,719 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-15 02:22:08,876 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/verifythis/prefixsum_iter.c[526,539] [2022-02-15 02:22:08,915 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 02:22:08,923 INFO L203 MainTranslator]: Completed pre-run [2022-02-15 02:22:08,934 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/verifythis/prefixsum_iter.c[526,539] [2022-02-15 02:22:08,956 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 02:22:08,965 INFO L208 MainTranslator]: Completed translation [2022-02-15 02:22:08,966 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:22:08 WrapperNode [2022-02-15 02:22:08,966 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-15 02:22:08,966 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-15 02:22:08,966 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-15 02:22:08,967 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-15 02:22:08,976 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:22:08" (1/1) ... [2022-02-15 02:22:08,976 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:22:08" (1/1) ... [2022-02-15 02:22:08,991 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:22:08" (1/1) ... [2022-02-15 02:22:08,992 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:22:08" (1/1) ... [2022-02-15 02:22:09,005 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:22:08" (1/1) ... [2022-02-15 02:22:09,008 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:22:08" (1/1) ... [2022-02-15 02:22:09,010 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:22:08" (1/1) ... [2022-02-15 02:22:09,013 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-15 02:22:09,014 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-15 02:22:09,014 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-15 02:22:09,014 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-15 02:22:09,015 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:22:08" (1/1) ... [2022-02-15 02:22:09,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 02:22:09,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 02:22:09,040 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) [2022-02-15 02:22:09,052 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 [2022-02-15 02:22:09,075 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-15 02:22:09,075 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-15 02:22:09,075 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-15 02:22:09,075 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-15 02:22:09,075 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-15 02:22:09,075 INFO L138 BoogieDeclarations]: Found implementation of procedure upsweep [2022-02-15 02:22:09,076 INFO L138 BoogieDeclarations]: Found implementation of procedure downsweep [2022-02-15 02:22:09,076 INFO L138 BoogieDeclarations]: Found implementation of procedure is_pow2 [2022-02-15 02:22:09,076 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2022-02-15 02:22:09,077 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-15 02:22:09,077 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-02-15 02:22:09,077 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2022-02-15 02:22:09,077 INFO L130 BoogieDeclarations]: Found specification of procedure free [2022-02-15 02:22:09,077 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-15 02:22:09,078 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-15 02:22:09,079 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-15 02:22:09,079 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-15 02:22:09,079 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-15 02:22:09,079 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-15 02:22:09,079 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-15 02:22:09,079 INFO L130 BoogieDeclarations]: Found specification of procedure upsweep [2022-02-15 02:22:09,080 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-15 02:22:09,080 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-15 02:22:09,080 INFO L130 BoogieDeclarations]: Found specification of procedure downsweep [2022-02-15 02:22:09,080 INFO L130 BoogieDeclarations]: Found specification of procedure is_pow2 [2022-02-15 02:22:09,080 INFO L130 BoogieDeclarations]: Found specification of procedure check [2022-02-15 02:22:09,080 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-15 02:22:09,080 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-02-15 02:22:09,080 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-02-15 02:22:09,080 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-15 02:22:09,080 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-15 02:22:09,080 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-15 02:22:09,080 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-15 02:22:09,182 INFO L234 CfgBuilder]: Building ICFG [2022-02-15 02:22:09,184 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-15 02:22:09,360 INFO L275 CfgBuilder]: Performing block encoding [2022-02-15 02:22:09,364 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-15 02:22:09,364 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2022-02-15 02:22:09,366 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 02:22:09 BoogieIcfgContainer [2022-02-15 02:22:09,366 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-15 02:22:09,367 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-15 02:22:09,367 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-15 02:22:09,369 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-15 02:22:09,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 02:22:08" (1/3) ... [2022-02-15 02:22:09,370 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14f2f06b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 02:22:09, skipping insertion in model container [2022-02-15 02:22:09,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:22:08" (2/3) ... [2022-02-15 02:22:09,370 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14f2f06b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 02:22:09, skipping insertion in model container [2022-02-15 02:22:09,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 02:22:09" (3/3) ... [2022-02-15 02:22:09,371 INFO L111 eAbstractionObserver]: Analyzing ICFG prefixsum_iter.c [2022-02-15 02:22:09,374 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-15 02:22:09,375 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-15 02:22:09,415 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-15 02:22:09,421 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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=JORDAN [2022-02-15 02:22:09,422 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-15 02:22:09,442 INFO L276 IsEmpty]: Start isEmpty. Operand has 64 states, 42 states have (on average 1.4047619047619047) internal successors, (59), 43 states have internal predecessors, (59), 11 states have call successors, (11), 9 states have call predecessors, (11), 9 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-02-15 02:22:09,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-15 02:22:09,448 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:22:09,449 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:22:09,449 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:22:09,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:22:09,453 INFO L85 PathProgramCache]: Analyzing trace with hash 242194828, now seen corresponding path program 1 times [2022-02-15 02:22:09,458 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:22:09,459 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1625818574] [2022-02-15 02:22:09,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:22:09,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:22:09,500 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:22:09,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:09,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:22:09,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:09,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:22:09,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:09,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-15 02:22:09,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:09,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:22:09,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:09,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-15 02:22:09,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:09,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-15 02:22:09,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:09,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-02-15 02:22:09,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:09,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-02-15 02:22:09,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:09,661 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-15 02:22:09,662 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:22:09,662 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1625818574] [2022-02-15 02:22:09,663 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1625818574] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:22:09,664 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:22:09,664 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 02:22:09,664 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744912712] [2022-02-15 02:22:09,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:22:09,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 02:22:09,668 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:22:09,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 02:22:09,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 02:22:09,688 INFO L87 Difference]: Start difference. First operand has 64 states, 42 states have (on average 1.4047619047619047) internal successors, (59), 43 states have internal predecessors, (59), 11 states have call successors, (11), 9 states have call predecessors, (11), 9 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-02-15 02:22:09,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:22:09,866 INFO L93 Difference]: Finished difference Result 127 states and 171 transitions. [2022-02-15 02:22:09,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-15 02:22:09,869 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 54 [2022-02-15 02:22:09,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:22:09,875 INFO L225 Difference]: With dead ends: 127 [2022-02-15 02:22:09,876 INFO L226 Difference]: Without dead ends: 63 [2022-02-15 02:22:09,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-15 02:22:09,883 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 81 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:22:09,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 59 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:22:09,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-02-15 02:22:09,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2022-02-15 02:22:09,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 38 states have internal predecessors, (45), 11 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-15 02:22:09,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2022-02-15 02:22:09,949 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 54 [2022-02-15 02:22:09,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:22:09,949 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2022-02-15 02:22:09,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-02-15 02:22:09,950 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2022-02-15 02:22:09,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-15 02:22:09,952 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:22:09,953 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:22:09,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-15 02:22:09,953 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:22:09,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:22:09,955 INFO L85 PathProgramCache]: Analyzing trace with hash -73515768, now seen corresponding path program 1 times [2022-02-15 02:22:09,955 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:22:09,956 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1651407611] [2022-02-15 02:22:09,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:22:09,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:22:09,960 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:22:10,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:10,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:22:10,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:10,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:22:10,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:10,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-15 02:22:10,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:10,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:22:10,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:10,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-15 02:22:10,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:10,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-15 02:22:10,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:10,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-02-15 02:22:10,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:10,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-02-15 02:22:10,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:10,192 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-15 02:22:10,192 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:22:10,193 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1651407611] [2022-02-15 02:22:10,193 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1651407611] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:22:10,193 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:22:10,193 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-15 02:22:10,193 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305836447] [2022-02-15 02:22:10,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:22:10,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 02:22:10,194 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:22:10,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 02:22:10,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-02-15 02:22:10,194 INFO L87 Difference]: Start difference. First operand 57 states and 65 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 5 states have internal predecessors, (30), 3 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-02-15 02:22:10,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:22:10,427 INFO L93 Difference]: Finished difference Result 81 states and 95 transitions. [2022-02-15 02:22:10,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 02:22:10,428 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 5 states have internal predecessors, (30), 3 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 54 [2022-02-15 02:22:10,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:22:10,430 INFO L225 Difference]: With dead ends: 81 [2022-02-15 02:22:10,430 INFO L226 Difference]: Without dead ends: 65 [2022-02-15 02:22:10,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-02-15 02:22:10,432 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 84 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:22:10,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 55 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:22:10,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-02-15 02:22:10,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 58. [2022-02-15 02:22:10,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 39 states have internal predecessors, (46), 11 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-15 02:22:10,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2022-02-15 02:22:10,451 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 54 [2022-02-15 02:22:10,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:22:10,451 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2022-02-15 02:22:10,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 5 states have internal predecessors, (30), 3 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-02-15 02:22:10,452 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2022-02-15 02:22:10,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-15 02:22:10,454 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:22:10,454 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:22:10,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-15 02:22:10,454 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:22:10,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:22:10,455 INFO L85 PathProgramCache]: Analyzing trace with hash -628313814, now seen corresponding path program 1 times [2022-02-15 02:22:10,455 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:22:10,455 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [52066258] [2022-02-15 02:22:10,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:22:10,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:22:10,457 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:22:10,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:10,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:22:10,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:10,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:22:10,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:10,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-15 02:22:10,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:10,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:22:10,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:10,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-15 02:22:10,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:10,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-15 02:22:10,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:10,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-02-15 02:22:10,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:10,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-02-15 02:22:10,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:10,787 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-15 02:22:10,787 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:22:10,788 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [52066258] [2022-02-15 02:22:10,788 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [52066258] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:22:10,788 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:22:10,788 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 02:22:10,788 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403705078] [2022-02-15 02:22:10,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:22:10,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 02:22:10,789 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:22:10,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 02:22:10,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2022-02-15 02:22:10,789 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 12 states have internal predecessors, (34), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-02-15 02:22:12,862 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-02-15 02:22:13,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:22:13,686 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2022-02-15 02:22:13,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 02:22:13,687 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 12 states have internal predecessors, (34), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 56 [2022-02-15 02:22:13,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:22:13,688 INFO L225 Difference]: With dead ends: 81 [2022-02-15 02:22:13,688 INFO L226 Difference]: Without dead ends: 79 [2022-02-15 02:22:13,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2022-02-15 02:22:13,689 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 163 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 110 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:22:13,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 62 Invalid, 760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 649 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2022-02-15 02:22:13,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-02-15 02:22:13,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 74. [2022-02-15 02:22:13,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 50 states have (on average 1.18) internal successors, (59), 51 states have internal predecessors, (59), 14 states have call successors, (14), 11 states have call predecessors, (14), 9 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-02-15 02:22:13,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 85 transitions. [2022-02-15 02:22:13,703 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 85 transitions. Word has length 56 [2022-02-15 02:22:13,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:22:13,703 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 85 transitions. [2022-02-15 02:22:13,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 12 states have internal predecessors, (34), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-02-15 02:22:13,703 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 85 transitions. [2022-02-15 02:22:13,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-15 02:22:13,704 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:22:13,704 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 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] [2022-02-15 02:22:13,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-15 02:22:13,705 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:22:13,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:22:13,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1653895387, now seen corresponding path program 1 times [2022-02-15 02:22:13,705 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:22:13,705 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [555433009] [2022-02-15 02:22:13,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:22:13,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:22:13,707 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:22:13,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:13,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:22:13,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:13,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:22:13,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:13,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-15 02:22:13,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:13,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:22:13,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:13,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-15 02:22:13,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:13,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-15 02:22:13,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:13,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-02-15 02:22:13,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:13,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-02-15 02:22:13,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:13,855 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-15 02:22:13,856 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:22:13,856 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [555433009] [2022-02-15 02:22:13,856 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [555433009] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:22:13,856 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:22:13,856 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 02:22:13,856 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695502897] [2022-02-15 02:22:13,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:22:13,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 02:22:13,857 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:22:13,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 02:22:13,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-02-15 02:22:13,858 INFO L87 Difference]: Start difference. First operand 74 states and 85 transitions. Second operand has 10 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-15 02:22:15,914 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-02-15 02:22:16,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:22:16,457 INFO L93 Difference]: Finished difference Result 115 states and 135 transitions. [2022-02-15 02:22:16,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 02:22:16,458 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 60 [2022-02-15 02:22:16,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:22:16,460 INFO L225 Difference]: With dead ends: 115 [2022-02-15 02:22:16,460 INFO L226 Difference]: Without dead ends: 85 [2022-02-15 02:22:16,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-02-15 02:22:16,461 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 102 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 56 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:22:16,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 52 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 321 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-02-15 02:22:16,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-02-15 02:22:16,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 81. [2022-02-15 02:22:16,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 55 states have (on average 1.2) internal successors, (66), 58 states have internal predecessors, (66), 15 states have call successors, (15), 11 states have call predecessors, (15), 10 states have return successors, (14), 11 states have call predecessors, (14), 12 states have call successors, (14) [2022-02-15 02:22:16,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 95 transitions. [2022-02-15 02:22:16,476 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 95 transitions. Word has length 60 [2022-02-15 02:22:16,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:22:16,478 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 95 transitions. [2022-02-15 02:22:16,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-15 02:22:16,478 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 95 transitions. [2022-02-15 02:22:16,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-15 02:22:16,481 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:22:16,481 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 1, 1] [2022-02-15 02:22:16,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-15 02:22:16,482 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:22:16,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:22:16,482 INFO L85 PathProgramCache]: Analyzing trace with hash 812630909, now seen corresponding path program 2 times [2022-02-15 02:22:16,482 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:22:16,482 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [595741092] [2022-02-15 02:22:16,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:22:16,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:22:16,484 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:22:16,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:16,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:22:16,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:16,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:22:16,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:16,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-15 02:22:16,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:16,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:22:16,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:16,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-15 02:22:16,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:16,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-15 02:22:16,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:16,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-15 02:22:16,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:16,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-02-15 02:22:16,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:16,785 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-15 02:22:16,785 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:22:16,786 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [595741092] [2022-02-15 02:22:16,786 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [595741092] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:22:16,786 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:22:16,786 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 02:22:16,786 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113567520] [2022-02-15 02:22:16,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:22:16,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 02:22:16,787 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:22:16,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 02:22:16,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2022-02-15 02:22:16,787 INFO L87 Difference]: Start difference. First operand 81 states and 95 transitions. Second operand has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-15 02:22:18,898 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-02-15 02:22:19,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:22:19,976 INFO L93 Difference]: Finished difference Result 116 states and 139 transitions. [2022-02-15 02:22:19,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 02:22:19,976 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 62 [2022-02-15 02:22:19,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:22:19,977 INFO L225 Difference]: With dead ends: 116 [2022-02-15 02:22:19,977 INFO L226 Difference]: Without dead ends: 96 [2022-02-15 02:22:19,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2022-02-15 02:22:19,979 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 101 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 805 mSolverCounterSat, 64 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 805 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-02-15 02:22:19,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 66 Invalid, 870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 805 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2022-02-15 02:22:19,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-02-15 02:22:19,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 86. [2022-02-15 02:22:19,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 58 states have (on average 1.206896551724138) internal successors, (70), 62 states have internal predecessors, (70), 16 states have call successors, (16), 11 states have call predecessors, (16), 11 states have return successors, (16), 12 states have call predecessors, (16), 13 states have call successors, (16) [2022-02-15 02:22:19,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 102 transitions. [2022-02-15 02:22:19,995 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 102 transitions. Word has length 62 [2022-02-15 02:22:19,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:22:19,995 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 102 transitions. [2022-02-15 02:22:19,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-15 02:22:19,996 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 102 transitions. [2022-02-15 02:22:19,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-15 02:22:19,996 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:22:19,996 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 1, 1] [2022-02-15 02:22:19,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-15 02:22:19,997 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:22:19,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:22:19,997 INFO L85 PathProgramCache]: Analyzing trace with hash 2146675487, now seen corresponding path program 1 times [2022-02-15 02:22:19,997 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:22:19,997 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1956221070] [2022-02-15 02:22:19,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:22:19,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:22:19,999 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:22:20,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:20,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:22:20,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:20,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:22:20,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:20,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-15 02:22:20,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:20,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:22:20,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:20,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-15 02:22:20,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:20,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-15 02:22:20,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:20,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-02-15 02:22:20,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:20,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-02-15 02:22:20,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:20,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-02-15 02:22:20,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:20,176 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-15 02:22:20,176 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:22:20,176 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1956221070] [2022-02-15 02:22:20,176 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1956221070] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:22:20,177 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:22:20,177 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 02:22:20,177 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433598870] [2022-02-15 02:22:20,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:22:20,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 02:22:20,177 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:22:20,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 02:22:20,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-02-15 02:22:20,178 INFO L87 Difference]: Start difference. First operand 86 states and 102 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 7 states have internal predecessors, (38), 4 states have call successors, (12), 5 states have call predecessors, (12), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-02-15 02:22:22,268 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-02-15 02:22:24,400 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-02-15 02:22:24,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:22:24,942 INFO L93 Difference]: Finished difference Result 106 states and 125 transitions. [2022-02-15 02:22:24,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 02:22:24,945 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 7 states have internal predecessors, (38), 4 states have call successors, (12), 5 states have call predecessors, (12), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 64 [2022-02-15 02:22:24,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:22:24,946 INFO L225 Difference]: With dead ends: 106 [2022-02-15 02:22:24,946 INFO L226 Difference]: Without dead ends: 86 [2022-02-15 02:22:24,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2022-02-15 02:22:24,947 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 92 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 51 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:22:24,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 56 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 381 Invalid, 2 Unknown, 0 Unchecked, 4.6s Time] [2022-02-15 02:22:24,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-02-15 02:22:24,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2022-02-15 02:22:24,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 58 states have (on average 1.1896551724137931) internal successors, (69), 61 states have internal predecessors, (69), 15 states have call successors, (15), 11 states have call predecessors, (15), 11 states have return successors, (15), 12 states have call predecessors, (15), 12 states have call successors, (15) [2022-02-15 02:22:24,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2022-02-15 02:22:24,978 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 64 [2022-02-15 02:22:24,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:22:24,978 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2022-02-15 02:22:24,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 7 states have internal predecessors, (38), 4 states have call successors, (12), 5 states have call predecessors, (12), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-02-15 02:22:24,978 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2022-02-15 02:22:24,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-15 02:22:24,979 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:22:24,979 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 1] [2022-02-15 02:22:24,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-15 02:22:24,979 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:22:24,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:22:24,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1958796481, now seen corresponding path program 2 times [2022-02-15 02:22:24,980 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:22:24,980 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [118053735] [2022-02-15 02:22:24,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:22:24,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:22:24,981 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:22:24,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:25,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:22:25,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:25,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:22:25,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:25,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-15 02:22:25,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:25,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:22:25,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:25,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-15 02:22:25,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:25,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-15 02:22:25,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:25,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-15 02:22:25,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:25,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-02-15 02:22:25,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:25,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-02-15 02:22:25,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:25,108 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-15 02:22:25,109 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:22:25,109 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [118053735] [2022-02-15 02:22:25,109 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [118053735] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:22:25,109 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:22:25,109 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-15 02:22:25,109 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259594132] [2022-02-15 02:22:25,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:22:25,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 02:22:25,110 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:22:25,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 02:22:25,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-02-15 02:22:25,110 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 7 states have internal predecessors, (39), 3 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-02-15 02:22:25,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:22:25,479 INFO L93 Difference]: Finished difference Result 116 states and 133 transitions. [2022-02-15 02:22:25,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 02:22:25,480 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 7 states have internal predecessors, (39), 3 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 66 [2022-02-15 02:22:25,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:22:25,480 INFO L225 Difference]: With dead ends: 116 [2022-02-15 02:22:25,480 INFO L226 Difference]: Without dead ends: 82 [2022-02-15 02:22:25,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-02-15 02:22:25,481 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 98 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 02:22:25,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 53 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 02:22:25,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-02-15 02:22:25,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 78. [2022-02-15 02:22:25,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 54 states have (on average 1.1666666666666667) internal successors, (63), 55 states have internal predecessors, (63), 14 states have call successors, (14), 11 states have call predecessors, (14), 9 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-02-15 02:22:25,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 89 transitions. [2022-02-15 02:22:25,490 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 89 transitions. Word has length 66 [2022-02-15 02:22:25,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:22:25,490 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 89 transitions. [2022-02-15 02:22:25,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 7 states have internal predecessors, (39), 3 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-02-15 02:22:25,490 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 89 transitions. [2022-02-15 02:22:25,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-02-15 02:22:25,491 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:22:25,491 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1] [2022-02-15 02:22:25,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-15 02:22:25,491 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:22:25,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:22:25,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1560433451, now seen corresponding path program 1 times [2022-02-15 02:22:25,492 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:22:25,492 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1251536562] [2022-02-15 02:22:25,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:22:25,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:22:25,493 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:22:25,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:25,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:22:25,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:25,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:22:25,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:25,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-15 02:22:25,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:25,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:22:25,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:25,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-15 02:22:25,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:25,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-15 02:22:25,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:25,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-15 02:22:25,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:25,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-02-15 02:22:25,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:25,642 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-15 02:22:25,642 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:22:25,642 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1251536562] [2022-02-15 02:22:25,643 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1251536562] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:22:25,643 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:22:25,643 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 02:22:25,643 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576149126] [2022-02-15 02:22:25,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:22:25,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 02:22:25,643 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:22:25,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 02:22:25,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-02-15 02:22:25,644 INFO L87 Difference]: Start difference. First operand 78 states and 89 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 10 states have internal predecessors, (41), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-02-15 02:22:26,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:22:26,305 INFO L93 Difference]: Finished difference Result 107 states and 123 transitions. [2022-02-15 02:22:26,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 02:22:26,307 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 10 states have internal predecessors, (41), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 65 [2022-02-15 02:22:26,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:22:26,308 INFO L225 Difference]: With dead ends: 107 [2022-02-15 02:22:26,308 INFO L226 Difference]: Without dead ends: 85 [2022-02-15 02:22:26,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2022-02-15 02:22:26,309 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 97 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:22:26,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 60 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 02:22:26,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-02-15 02:22:26,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 80. [2022-02-15 02:22:26,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 57 states have internal predecessors, (66), 14 states have call successors, (14), 11 states have call predecessors, (14), 9 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-02-15 02:22:26,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 92 transitions. [2022-02-15 02:22:26,318 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 92 transitions. Word has length 65 [2022-02-15 02:22:26,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:22:26,318 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 92 transitions. [2022-02-15 02:22:26,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 10 states have internal predecessors, (41), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-02-15 02:22:26,318 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 92 transitions. [2022-02-15 02:22:26,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-15 02:22:26,319 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:22:26,319 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1] [2022-02-15 02:22:26,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-15 02:22:26,319 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:22:26,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:22:26,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1084413588, now seen corresponding path program 1 times [2022-02-15 02:22:26,320 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:22:26,320 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [997143393] [2022-02-15 02:22:26,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:22:26,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:22:26,321 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:22:26,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:27,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:22:27,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:27,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:22:27,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:27,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-15 02:22:27,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:27,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:22:27,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:27,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-15 02:22:27,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:27,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-15 02:22:27,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:27,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-15 02:22:27,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:27,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-02-15 02:22:27,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:31,442 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-15 02:22:31,443 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:22:31,443 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [997143393] [2022-02-15 02:22:31,443 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [997143393] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:22:31,443 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:22:31,443 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-15 02:22:31,443 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155490238] [2022-02-15 02:22:31,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:22:31,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 02:22:31,444 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:22:31,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 02:22:31,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2022-02-15 02:22:31,444 INFO L87 Difference]: Start difference. First operand 80 states and 92 transitions. Second operand has 25 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 19 states have internal predecessors, (44), 7 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-02-15 02:22:34,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:22:34,692 INFO L93 Difference]: Finished difference Result 123 states and 148 transitions. [2022-02-15 02:22:34,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 02:22:34,692 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 19 states have internal predecessors, (44), 7 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 66 [2022-02-15 02:22:34,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:22:34,694 INFO L225 Difference]: With dead ends: 123 [2022-02-15 02:22:34,694 INFO L226 Difference]: Without dead ends: 121 [2022-02-15 02:22:34,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=356, Invalid=2296, Unknown=0, NotChecked=0, Total=2652 [2022-02-15 02:22:34,695 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 202 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 992 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 1182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:22:34,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 62 Invalid, 1182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 992 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-15 02:22:34,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-02-15 02:22:34,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 93. [2022-02-15 02:22:34,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 66 states have (on average 1.2121212121212122) internal successors, (80), 69 states have internal predecessors, (80), 16 states have call successors, (16), 11 states have call predecessors, (16), 10 states have return successors, (18), 12 states have call predecessors, (18), 13 states have call successors, (18) [2022-02-15 02:22:34,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 114 transitions. [2022-02-15 02:22:34,709 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 114 transitions. Word has length 66 [2022-02-15 02:22:34,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:22:34,710 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 114 transitions. [2022-02-15 02:22:34,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 19 states have internal predecessors, (44), 7 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-02-15 02:22:34,710 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 114 transitions. [2022-02-15 02:22:34,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-02-15 02:22:34,711 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:22:34,711 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1] [2022-02-15 02:22:34,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-15 02:22:34,711 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:22:34,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:22:34,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1470293173, now seen corresponding path program 2 times [2022-02-15 02:22:34,711 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:22:34,711 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1756494063] [2022-02-15 02:22:34,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:22:34,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:22:34,713 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:22:34,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:34,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:22:34,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:34,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:22:34,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:34,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-15 02:22:34,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:34,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:22:34,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:34,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-15 02:22:34,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:34,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-15 02:22:34,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:34,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-15 02:22:34,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:34,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-02-15 02:22:34,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:34,874 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-15 02:22:34,874 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:22:34,874 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1756494063] [2022-02-15 02:22:34,875 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1756494063] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:22:34,875 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:22:34,875 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 02:22:34,875 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301789771] [2022-02-15 02:22:34,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:22:34,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 02:22:34,875 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:22:34,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 02:22:34,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-02-15 02:22:34,876 INFO L87 Difference]: Start difference. First operand 93 states and 114 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 10 states have internal predecessors, (43), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-02-15 02:22:36,959 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-02-15 02:22:37,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:22:37,656 INFO L93 Difference]: Finished difference Result 127 states and 157 transitions. [2022-02-15 02:22:37,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 02:22:37,656 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 10 states have internal predecessors, (43), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 67 [2022-02-15 02:22:37,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:22:37,657 INFO L225 Difference]: With dead ends: 127 [2022-02-15 02:22:37,657 INFO L226 Difference]: Without dead ends: 107 [2022-02-15 02:22:37,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2022-02-15 02:22:37,659 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 102 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 56 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:22:37,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 63 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 520 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2022-02-15 02:22:37,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-02-15 02:22:37,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 103. [2022-02-15 02:22:37,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 74 states have (on average 1.2297297297297298) internal successors, (91), 78 states have internal predecessors, (91), 17 states have call successors, (17), 11 states have call predecessors, (17), 11 states have return successors, (22), 13 states have call predecessors, (22), 14 states have call successors, (22) [2022-02-15 02:22:37,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 130 transitions. [2022-02-15 02:22:37,683 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 130 transitions. Word has length 67 [2022-02-15 02:22:37,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:22:37,683 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 130 transitions. [2022-02-15 02:22:37,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 10 states have internal predecessors, (43), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-02-15 02:22:37,684 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 130 transitions. [2022-02-15 02:22:37,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 02:22:37,684 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:22:37,684 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 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, 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] [2022-02-15 02:22:37,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-15 02:22:37,685 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:22:37,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:22:37,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1247511922, now seen corresponding path program 3 times [2022-02-15 02:22:37,686 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:22:37,686 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2091831761] [2022-02-15 02:22:37,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:22:37,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:22:37,688 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:22:37,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:37,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:22:37,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:37,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:22:37,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:37,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-15 02:22:37,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:37,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:22:37,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:37,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-15 02:22:37,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:37,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-15 02:22:37,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:37,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-02-15 02:22:37,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:37,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-02-15 02:22:37,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:37,883 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-15 02:22:37,883 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:22:37,883 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2091831761] [2022-02-15 02:22:37,883 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2091831761] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:22:37,883 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:22:37,883 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 02:22:37,883 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314839454] [2022-02-15 02:22:37,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:22:37,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 02:22:37,884 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:22:37,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 02:22:37,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-02-15 02:22:37,885 INFO L87 Difference]: Start difference. First operand 103 states and 130 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 11 states have internal predecessors, (44), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-15 02:22:39,989 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-02-15 02:22:42,122 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-02-15 02:22:44,271 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-02-15 02:22:45,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:22:45,067 INFO L93 Difference]: Finished difference Result 169 states and 215 transitions. [2022-02-15 02:22:45,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 02:22:45,068 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 11 states have internal predecessors, (44), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 68 [2022-02-15 02:22:45,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:22:45,069 INFO L225 Difference]: With dead ends: 169 [2022-02-15 02:22:45,069 INFO L226 Difference]: Without dead ends: 120 [2022-02-15 02:22:45,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=155, Invalid=657, Unknown=0, NotChecked=0, Total=812 [2022-02-15 02:22:45,070 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 110 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 80 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-02-15 02:22:45,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 66 Invalid, 814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 731 Invalid, 3 Unknown, 0 Unchecked, 6.9s Time] [2022-02-15 02:22:45,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-02-15 02:22:45,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 109. [2022-02-15 02:22:45,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 80 states have (on average 1.2625) internal successors, (101), 85 states have internal predecessors, (101), 16 states have call successors, (16), 11 states have call predecessors, (16), 12 states have return successors, (19), 12 states have call predecessors, (19), 13 states have call successors, (19) [2022-02-15 02:22:45,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 136 transitions. [2022-02-15 02:22:45,086 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 136 transitions. Word has length 68 [2022-02-15 02:22:45,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:22:45,086 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 136 transitions. [2022-02-15 02:22:45,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 11 states have internal predecessors, (44), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-15 02:22:45,086 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 136 transitions. [2022-02-15 02:22:45,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-15 02:22:45,087 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:22:45,087 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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, 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, 1, 1, 1, 1, 1] [2022-02-15 02:22:45,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-15 02:22:45,087 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:22:45,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:22:45,087 INFO L85 PathProgramCache]: Analyzing trace with hash -677053431, now seen corresponding path program 4 times [2022-02-15 02:22:45,087 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:22:45,087 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1149707819] [2022-02-15 02:22:45,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:22:45,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:22:45,089 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:22:45,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:45,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:22:45,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:45,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:22:45,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:45,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-15 02:22:45,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:45,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:22:45,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:45,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-15 02:22:45,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:45,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-15 02:22:45,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:45,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-02-15 02:22:45,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:45,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-02-15 02:22:45,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:45,249 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-15 02:22:45,249 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:22:45,249 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1149707819] [2022-02-15 02:22:45,249 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1149707819] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:22:45,249 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:22:45,250 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 02:22:45,250 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802467687] [2022-02-15 02:22:45,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:22:45,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 02:22:45,250 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:22:45,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 02:22:45,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2022-02-15 02:22:45,251 INFO L87 Difference]: Start difference. First operand 109 states and 136 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 11 states have internal predecessors, (45), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-15 02:22:45,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:22:45,977 INFO L93 Difference]: Finished difference Result 175 states and 220 transitions. [2022-02-15 02:22:45,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 02:22:45,978 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 11 states have internal predecessors, (45), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 69 [2022-02-15 02:22:45,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:22:45,979 INFO L225 Difference]: With dead ends: 175 [2022-02-15 02:22:45,979 INFO L226 Difference]: Without dead ends: 120 [2022-02-15 02:22:45,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2022-02-15 02:22:45,980 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 100 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:22:45,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 63 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 676 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 02:22:45,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-02-15 02:22:45,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2022-02-15 02:22:45,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 88 states have (on average 1.2840909090909092) internal successors, (113), 93 states have internal predecessors, (113), 16 states have call successors, (16), 11 states have call predecessors, (16), 12 states have return successors, (19), 12 states have call predecessors, (19), 13 states have call successors, (19) [2022-02-15 02:22:45,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 148 transitions. [2022-02-15 02:22:45,997 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 148 transitions. Word has length 69 [2022-02-15 02:22:45,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:22:45,997 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 148 transitions. [2022-02-15 02:22:45,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 11 states have internal predecessors, (45), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-15 02:22:45,997 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 148 transitions. [2022-02-15 02:22:45,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-15 02:22:45,998 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:22:45,998 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1] [2022-02-15 02:22:45,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-15 02:22:45,998 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:22:45,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:22:45,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1405616165, now seen corresponding path program 5 times [2022-02-15 02:22:45,998 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:22:45,998 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1396088448] [2022-02-15 02:22:45,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:22:45,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:22:46,000 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:22:46,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:46,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:22:46,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:46,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:22:46,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:46,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-15 02:22:46,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:46,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:22:46,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:46,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-15 02:22:46,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:46,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-15 02:22:46,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:46,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-15 02:22:46,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:46,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-02-15 02:22:46,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:46,189 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-15 02:22:46,190 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:22:46,190 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1396088448] [2022-02-15 02:22:46,190 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1396088448] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:22:46,190 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:22:46,190 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 02:22:46,190 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159459898] [2022-02-15 02:22:46,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:22:46,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 02:22:46,190 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:22:46,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 02:22:46,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-02-15 02:22:46,191 INFO L87 Difference]: Start difference. First operand 117 states and 148 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 11 states have internal predecessors, (46), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-02-15 02:22:46,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:22:46,855 INFO L93 Difference]: Finished difference Result 143 states and 176 transitions. [2022-02-15 02:22:46,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 02:22:46,855 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 11 states have internal predecessors, (46), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 70 [2022-02-15 02:22:46,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:22:46,856 INFO L225 Difference]: With dead ends: 143 [2022-02-15 02:22:46,856 INFO L226 Difference]: Without dead ends: 123 [2022-02-15 02:22:46,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2022-02-15 02:22:46,857 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 92 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:22:46,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 61 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 02:22:46,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-02-15 02:22:46,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 101. [2022-02-15 02:22:46,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 75 states have (on average 1.2666666666666666) internal successors, (95), 78 states have internal predecessors, (95), 15 states have call successors, (15), 11 states have call predecessors, (15), 10 states have return successors, (14), 11 states have call predecessors, (14), 12 states have call successors, (14) [2022-02-15 02:22:46,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 124 transitions. [2022-02-15 02:22:46,872 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 124 transitions. Word has length 70 [2022-02-15 02:22:46,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:22:46,873 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 124 transitions. [2022-02-15 02:22:46,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 11 states have internal predecessors, (46), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-02-15 02:22:46,873 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 124 transitions. [2022-02-15 02:22:46,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-15 02:22:46,873 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:22:46,873 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:22:46,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-15 02:22:46,874 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:22:46,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:22:46,874 INFO L85 PathProgramCache]: Analyzing trace with hash 875388352, now seen corresponding path program 1 times [2022-02-15 02:22:46,874 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:22:46,874 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1150263898] [2022-02-15 02:22:46,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:22:46,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:22:46,875 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:22:46,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:46,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:22:46,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:46,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:22:46,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:46,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-15 02:22:46,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:46,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:22:46,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:46,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-15 02:22:46,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:46,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-15 02:22:46,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:46,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-15 02:22:46,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:46,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-02-15 02:22:46,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:46,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-02-15 02:22:46,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:46,925 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-15 02:22:46,925 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:22:46,925 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1150263898] [2022-02-15 02:22:46,925 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1150263898] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:22:46,925 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:22:46,925 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-15 02:22:46,925 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566964086] [2022-02-15 02:22:46,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:22:46,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-15 02:22:46,926 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:22:46,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-15 02:22:46,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-15 02:22:46,926 INFO L87 Difference]: Start difference. First operand 101 states and 124 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-02-15 02:22:47,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:22:47,088 INFO L93 Difference]: Finished difference Result 162 states and 201 transitions. [2022-02-15 02:22:47,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 02:22:47,088 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 73 [2022-02-15 02:22:47,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:22:47,089 INFO L225 Difference]: With dead ends: 162 [2022-02-15 02:22:47,089 INFO L226 Difference]: Without dead ends: 101 [2022-02-15 02:22:47,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-15 02:22:47,090 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 65 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:22:47,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 53 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:22:47,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-02-15 02:22:47,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2022-02-15 02:22:47,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 75 states have (on average 1.2266666666666666) internal successors, (92), 78 states have internal predecessors, (92), 15 states have call successors, (15), 11 states have call predecessors, (15), 10 states have return successors, (14), 11 states have call predecessors, (14), 12 states have call successors, (14) [2022-02-15 02:22:47,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 121 transitions. [2022-02-15 02:22:47,103 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 121 transitions. Word has length 73 [2022-02-15 02:22:47,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:22:47,103 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 121 transitions. [2022-02-15 02:22:47,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-02-15 02:22:47,103 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 121 transitions. [2022-02-15 02:22:47,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-15 02:22:47,104 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:22:47,104 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:22:47,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-15 02:22:47,104 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:22:47,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:22:47,104 INFO L85 PathProgramCache]: Analyzing trace with hash -495926943, now seen corresponding path program 1 times [2022-02-15 02:22:47,105 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:22:47,105 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1212507460] [2022-02-15 02:22:47,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:22:47,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:22:47,106 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:22:47,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:47,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:22:47,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:47,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:22:47,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:47,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-15 02:22:47,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:47,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:22:47,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:47,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-15 02:22:47,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:47,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-15 02:22:47,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:47,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-15 02:22:47,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:47,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-02-15 02:22:47,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:47,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-02-15 02:22:47,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:47,337 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-15 02:22:47,338 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:22:47,338 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1212507460] [2022-02-15 02:22:47,338 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1212507460] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:22:47,338 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:22:47,338 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 02:22:47,338 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216468568] [2022-02-15 02:22:47,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:22:47,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 02:22:47,338 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:22:47,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 02:22:47,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-02-15 02:22:47,339 INFO L87 Difference]: Start difference. First operand 101 states and 121 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 10 states have internal predecessors, (47), 3 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-02-15 02:22:49,443 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-02-15 02:22:50,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:22:50,136 INFO L93 Difference]: Finished difference Result 185 states and 226 transitions. [2022-02-15 02:22:50,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 02:22:50,137 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 10 states have internal predecessors, (47), 3 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 74 [2022-02-15 02:22:50,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:22:50,138 INFO L225 Difference]: With dead ends: 185 [2022-02-15 02:22:50,138 INFO L226 Difference]: Without dead ends: 123 [2022-02-15 02:22:50,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2022-02-15 02:22:50,138 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 80 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 61 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:22:50,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 65 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 470 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2022-02-15 02:22:50,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-02-15 02:22:50,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 117. [2022-02-15 02:22:50,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 87 states have (on average 1.206896551724138) internal successors, (105), 90 states have internal predecessors, (105), 18 states have call successors, (18), 11 states have call predecessors, (18), 11 states have return successors, (18), 15 states have call predecessors, (18), 15 states have call successors, (18) [2022-02-15 02:22:50,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 141 transitions. [2022-02-15 02:22:50,172 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 141 transitions. Word has length 74 [2022-02-15 02:22:50,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:22:50,172 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 141 transitions. [2022-02-15 02:22:50,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 10 states have internal predecessors, (47), 3 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-02-15 02:22:50,172 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 141 transitions. [2022-02-15 02:22:50,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-15 02:22:50,175 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:22:50,175 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 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, 1, 1] [2022-02-15 02:22:50,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-15 02:22:50,175 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:22:50,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:22:50,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1541127366, now seen corresponding path program 6 times [2022-02-15 02:22:50,176 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:22:50,176 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [815939877] [2022-02-15 02:22:50,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:22:50,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:22:50,178 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:22:50,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:50,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:22:50,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:50,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:22:50,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:50,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-15 02:22:50,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:50,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:22:50,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:50,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-15 02:22:50,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:50,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-15 02:22:50,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:50,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-02-15 02:22:50,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:50,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-15 02:22:50,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:50,410 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-15 02:22:50,410 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:22:50,410 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [815939877] [2022-02-15 02:22:50,410 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [815939877] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:22:50,410 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:22:50,410 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 02:22:50,410 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910367626] [2022-02-15 02:22:50,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:22:50,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 02:22:50,411 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:22:50,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 02:22:50,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-02-15 02:22:50,411 INFO L87 Difference]: Start difference. First operand 117 states and 141 transitions. Second operand has 13 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 10 states have internal predecessors, (44), 3 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-02-15 02:22:52,512 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-02-15 02:22:54,645 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-02-15 02:22:55,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:22:55,379 INFO L93 Difference]: Finished difference Result 180 states and 222 transitions. [2022-02-15 02:22:55,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 02:22:55,380 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 10 states have internal predecessors, (44), 3 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 73 [2022-02-15 02:22:55,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:22:55,381 INFO L225 Difference]: With dead ends: 180 [2022-02-15 02:22:55,381 INFO L226 Difference]: Without dead ends: 158 [2022-02-15 02:22:55,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2022-02-15 02:22:55,382 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 87 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 38 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:22:55,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 64 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 681 Invalid, 2 Unknown, 0 Unchecked, 4.8s Time] [2022-02-15 02:22:55,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-02-15 02:22:55,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 132. [2022-02-15 02:22:55,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 99 states have (on average 1.2323232323232323) internal successors, (122), 104 states have internal predecessors, (122), 19 states have call successors, (19), 11 states have call predecessors, (19), 13 states have return successors, (21), 16 states have call predecessors, (21), 16 states have call successors, (21) [2022-02-15 02:22:55,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 162 transitions. [2022-02-15 02:22:55,400 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 162 transitions. Word has length 73 [2022-02-15 02:22:55,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:22:55,400 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 162 transitions. [2022-02-15 02:22:55,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 10 states have internal predecessors, (44), 3 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-02-15 02:22:55,400 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 162 transitions. [2022-02-15 02:22:55,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-02-15 02:22:55,401 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:22:55,401 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:22:55,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-15 02:22:55,401 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:22:55,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:22:55,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1213658525, now seen corresponding path program 1 times [2022-02-15 02:22:55,402 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:22:55,402 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1597470780] [2022-02-15 02:22:55,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:23:08,198 WARN L228 SmtUtils]: Spent 12.79s on a formula simplification that was a NOOP. DAG size: 13 (called from [L 232] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-02-15 02:23:29,518 WARN L228 SmtUtils]: Spent 12.77s on a formula simplification that was a NOOP. DAG size: 13 (called from [L 269] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-02-15 02:23:29,530 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:23:29,530 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-02-15 02:23:29,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:23:29,531 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:23:29,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:23:30,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:23:30,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:23:30,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:23:30,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:23:30,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-15 02:23:30,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:23:30,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-02-15 02:23:30,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:23:30,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-02-15 02:23:30,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:23:30,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-02-15 02:23:30,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:23:30,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-02-15 02:23:30,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:23:30,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-02-15 02:23:30,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:23:31,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-02-15 02:23:31,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:23:31,675 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-15 02:23:31,676 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:23:31,676 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1597470780] [2022-02-15 02:23:31,676 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1597470780] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:23:31,676 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:23:31,676 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-15 02:23:31,676 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865255717] [2022-02-15 02:23:31,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:23:31,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 02:23:31,676 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:23:31,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 02:23:31,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1103, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 02:23:31,677 INFO L87 Difference]: Start difference. First operand 132 states and 162 transitions. Second operand has 35 states, 30 states have (on average 1.7) internal successors, (51), 28 states have internal predecessors, (51), 8 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-02-15 02:23:33,877 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-02-15 02:23:36,008 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-02-15 02:23:38,108 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-02-15 02:23:41,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:23:41,442 INFO L93 Difference]: Finished difference Result 164 states and 199 transitions. [2022-02-15 02:23:41,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 02:23:41,443 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 30 states have (on average 1.7) internal successors, (51), 28 states have internal predecessors, (51), 8 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) Word has length 75 [2022-02-15 02:23:41,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:23:41,444 INFO L225 Difference]: With dead ends: 164 [2022-02-15 02:23:41,444 INFO L226 Difference]: Without dead ends: 162 [2022-02-15 02:23:41,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 796 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=394, Invalid=4298, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 02:23:41,445 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 133 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 1745 mSolverCounterSat, 149 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 1897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 1745 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:23:41,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 67 Invalid, 1897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 1745 Invalid, 3 Unknown, 0 Unchecked, 7.7s Time] [2022-02-15 02:23:41,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-02-15 02:23:41,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 144. [2022-02-15 02:23:41,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 107 states have (on average 1.2149532710280373) internal successors, (130), 112 states have internal predecessors, (130), 22 states have call successors, (22), 13 states have call predecessors, (22), 14 states have return successors, (23), 18 states have call predecessors, (23), 18 states have call successors, (23) [2022-02-15 02:23:41,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 175 transitions. [2022-02-15 02:23:41,468 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 175 transitions. Word has length 75 [2022-02-15 02:23:41,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:23:41,469 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 175 transitions. [2022-02-15 02:23:41,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 30 states have (on average 1.7) internal successors, (51), 28 states have internal predecessors, (51), 8 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-02-15 02:23:41,469 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 175 transitions. [2022-02-15 02:23:41,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-15 02:23:41,470 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:23:41,470 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 1] [2022-02-15 02:23:41,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-15 02:23:41,470 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:23:41,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:23:41,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1496849804, now seen corresponding path program 7 times [2022-02-15 02:23:41,471 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:23:41,471 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1965197836] [2022-02-15 02:23:41,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:23:41,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:23:41,473 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:23:41,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:23:43,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:23:43,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:23:43,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:23:43,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:23:43,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-15 02:23:43,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:23:43,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:23:43,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:23:43,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-15 02:23:43,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:23:43,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-15 02:23:43,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:23:43,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-02-15 02:23:43,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:23:45,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-15 02:23:45,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:24:06,747 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-15 02:24:06,748 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:24:06,748 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1965197836] [2022-02-15 02:24:06,748 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1965197836] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:24:06,748 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:24:06,748 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-15 02:24:06,748 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014294916] [2022-02-15 02:24:06,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:24:06,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 02:24:06,748 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:24:06,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 02:24:06,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1231, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 02:24:06,749 INFO L87 Difference]: Start difference. First operand 144 states and 175 transitions. Second operand has 37 states, 32 states have (on average 1.6875) internal successors, (54), 30 states have internal predecessors, (54), 7 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-02-15 02:24:09,060 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-02-15 02:24:16,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:24:16,751 INFO L93 Difference]: Finished difference Result 200 states and 255 transitions. [2022-02-15 02:24:16,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 02:24:16,751 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 32 states have (on average 1.6875) internal successors, (54), 30 states have internal predecessors, (54), 7 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 76 [2022-02-15 02:24:16,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:24:16,752 INFO L225 Difference]: With dead ends: 200 [2022-02-15 02:24:16,752 INFO L226 Difference]: Without dead ends: 198 [2022-02-15 02:24:16,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 874 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=409, Invalid=4703, Unknown=0, NotChecked=0, Total=5112 [2022-02-15 02:24:16,754 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 173 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 2272 mSolverCounterSat, 173 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 2446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 2272 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-02-15 02:24:16,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 71 Invalid, 2446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 2272 Invalid, 1 Unknown, 0 Unchecked, 6.3s Time] [2022-02-15 02:24:16,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-02-15 02:24:16,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 169. [2022-02-15 02:24:16,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 127 states have (on average 1.236220472440945) internal successors, (157), 134 states have internal predecessors, (157), 25 states have call successors, (25), 14 states have call predecessors, (25), 16 states have return successors, (33), 20 states have call predecessors, (33), 20 states have call successors, (33) [2022-02-15 02:24:16,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 215 transitions. [2022-02-15 02:24:16,787 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 215 transitions. Word has length 76 [2022-02-15 02:24:16,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:24:16,787 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 215 transitions. [2022-02-15 02:24:16,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 32 states have (on average 1.6875) internal successors, (54), 30 states have internal predecessors, (54), 7 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-02-15 02:24:16,787 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 215 transitions. [2022-02-15 02:24:16,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-02-15 02:24:16,788 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:24:16,788 INFO L514 BasicCegarLoop]: trace histogram [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, 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] [2022-02-15 02:24:16,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-15 02:24:16,788 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:24:16,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:24:16,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1239460651, now seen corresponding path program 8 times [2022-02-15 02:24:16,789 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:24:16,789 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1652386772] [2022-02-15 02:24:16,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:24:16,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:24:16,790 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:24:16,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:24:16,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:24:16,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:24:16,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:24:16,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:24:16,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-15 02:24:16,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:24:16,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:24:16,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:24:16,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-15 02:24:16,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:24:16,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-15 02:24:16,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:24:16,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-02-15 02:24:16,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:24:16,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-15 02:24:16,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:24:16,980 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-15 02:24:16,980 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:24:16,981 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1652386772] [2022-02-15 02:24:16,981 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1652386772] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:24:16,981 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:24:16,981 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 02:24:16,981 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632788421] [2022-02-15 02:24:16,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:24:16,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 02:24:16,981 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:24:16,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 02:24:16,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-02-15 02:24:16,982 INFO L87 Difference]: Start difference. First operand 169 states and 215 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 12 states have internal predecessors, (48), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-02-15 02:24:19,047 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-02-15 02:24:21,154 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-02-15 02:24:23,266 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-02-15 02:24:23,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:24:23,841 INFO L93 Difference]: Finished difference Result 196 states and 251 transitions. [2022-02-15 02:24:23,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 02:24:23,842 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 12 states have internal predecessors, (48), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 77 [2022-02-15 02:24:23,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:24:23,843 INFO L225 Difference]: With dead ends: 196 [2022-02-15 02:24:23,843 INFO L226 Difference]: Without dead ends: 184 [2022-02-15 02:24:23,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2022-02-15 02:24:23,844 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 95 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 60 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:24:23,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 67 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 699 Invalid, 3 Unknown, 0 Unchecked, 6.7s Time] [2022-02-15 02:24:23,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-02-15 02:24:23,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 179. [2022-02-15 02:24:23,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 135 states have (on average 1.2444444444444445) internal successors, (168), 143 states have internal predecessors, (168), 26 states have call successors, (26), 14 states have call predecessors, (26), 17 states have return successors, (37), 21 states have call predecessors, (37), 21 states have call successors, (37) [2022-02-15 02:24:23,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 231 transitions. [2022-02-15 02:24:23,879 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 231 transitions. Word has length 77 [2022-02-15 02:24:23,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:24:23,880 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 231 transitions. [2022-02-15 02:24:23,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 12 states have internal predecessors, (48), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-02-15 02:24:23,880 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 231 transitions. [2022-02-15 02:24:23,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-02-15 02:24:23,881 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:24:23,881 INFO L514 BasicCegarLoop]: trace histogram [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, 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] [2022-02-15 02:24:23,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-15 02:24:23,881 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:24:23,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:24:23,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1092715177, now seen corresponding path program 9 times [2022-02-15 02:24:23,881 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:24:23,881 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1744527] [2022-02-15 02:24:23,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:24:23,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:24:23,883 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:24:23,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:24:23,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:24:23,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:24:23,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:24:23,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:24:23,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-15 02:24:23,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:24:23,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:24:23,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:24:23,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-15 02:24:23,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:24:23,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-15 02:24:23,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:24:23,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-02-15 02:24:23,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:24:23,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-15 02:24:23,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:24:23,978 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-15 02:24:23,979 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:24:23,979 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1744527] [2022-02-15 02:24:23,979 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1744527] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:24:23,979 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:24:23,979 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-15 02:24:23,979 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490787981] [2022-02-15 02:24:23,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:24:23,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 02:24:23,979 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:24:23,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 02:24:23,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-02-15 02:24:23,980 INFO L87 Difference]: Start difference. First operand 179 states and 231 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 7 states have internal predecessors, (44), 2 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-02-15 02:24:24,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:24:24,387 INFO L93 Difference]: Finished difference Result 204 states and 263 transitions. [2022-02-15 02:24:24,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 02:24:24,388 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 7 states have internal predecessors, (44), 2 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 77 [2022-02-15 02:24:24,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:24:24,388 INFO L225 Difference]: With dead ends: 204 [2022-02-15 02:24:24,388 INFO L226 Difference]: Without dead ends: 176 [2022-02-15 02:24:24,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-02-15 02:24:24,389 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 68 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 02:24:24,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 57 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 02:24:24,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-02-15 02:24:24,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 172. [2022-02-15 02:24:24,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 129 states have (on average 1.2248062015503876) internal successors, (158), 136 states have internal predecessors, (158), 26 states have call successors, (26), 14 states have call predecessors, (26), 16 states have return successors, (34), 21 states have call predecessors, (34), 21 states have call successors, (34) [2022-02-15 02:24:24,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 218 transitions. [2022-02-15 02:24:24,428 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 218 transitions. Word has length 77 [2022-02-15 02:24:24,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:24:24,429 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 218 transitions. [2022-02-15 02:24:24,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 7 states have internal predecessors, (44), 2 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-02-15 02:24:24,429 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 218 transitions. [2022-02-15 02:24:24,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-02-15 02:24:24,430 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:24:24,430 INFO L514 BasicCegarLoop]: trace histogram [4, 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, 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, 1] [2022-02-15 02:24:24,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-15 02:24:24,430 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:24:24,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:24:24,430 INFO L85 PathProgramCache]: Analyzing trace with hash 873001991, now seen corresponding path program 10 times [2022-02-15 02:24:24,430 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:24:24,430 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [892861897] [2022-02-15 02:24:24,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:24:24,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:24:24,433 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:24:24,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:24:24,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:24:24,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:24:24,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:24:24,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:24:24,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-15 02:24:24,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:24:24,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:24:24,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:24:24,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-15 02:24:24,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:24:24,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-15 02:24:24,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:24:24,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-02-15 02:24:24,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:24:24,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-02-15 02:24:24,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:24:24,617 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-15 02:24:24,617 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:24:24,617 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [892861897] [2022-02-15 02:24:24,617 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [892861897] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:24:24,617 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:24:24,617 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-15 02:24:24,617 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589296084] [2022-02-15 02:24:24,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:24:24,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 02:24:24,618 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:24:24,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 02:24:24,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2022-02-15 02:24:24,618 INFO L87 Difference]: Start difference. First operand 172 states and 218 transitions. Second operand has 15 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-15 02:24:26,701 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-02-15 02:24:28,805 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-02-15 02:24:29,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:24:29,502 INFO L93 Difference]: Finished difference Result 252 states and 318 transitions. [2022-02-15 02:24:29,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 02:24:29,502 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 77 [2022-02-15 02:24:29,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:24:29,503 INFO L225 Difference]: With dead ends: 252 [2022-02-15 02:24:29,503 INFO L226 Difference]: Without dead ends: 184 [2022-02-15 02:24:29,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=150, Invalid=720, Unknown=0, NotChecked=0, Total=870 [2022-02-15 02:24:29,504 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 104 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 81 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:24:29,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 62 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 733 Invalid, 2 Unknown, 0 Unchecked, 4.6s Time] [2022-02-15 02:24:29,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-02-15 02:24:29,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 182. [2022-02-15 02:24:29,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 138 states have (on average 1.2246376811594204) internal successors, (169), 146 states have internal predecessors, (169), 26 states have call successors, (26), 14 states have call predecessors, (26), 17 states have return successors, (35), 21 states have call predecessors, (35), 21 states have call successors, (35) [2022-02-15 02:24:29,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 230 transitions. [2022-02-15 02:24:29,540 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 230 transitions. Word has length 77 [2022-02-15 02:24:29,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:24:29,541 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 230 transitions. [2022-02-15 02:24:29,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-15 02:24:29,541 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 230 transitions. [2022-02-15 02:24:29,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-02-15 02:24:29,542 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:24:29,542 INFO L514 BasicCegarLoop]: trace histogram [2, 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, 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, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:24:29,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-15 02:24:29,542 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:24:29,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:24:29,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1297400883, now seen corresponding path program 2 times [2022-02-15 02:24:29,542 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:24:29,542 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [740694506] [2022-02-15 02:24:29,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:24:42,349 WARN L228 SmtUtils]: Spent 12.81s on a formula simplification that was a NOOP. DAG size: 13 (called from [L 232] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-02-15 02:24:59,396 WARN L228 SmtUtils]: Spent 10.65s on a formula simplification that was a NOOP. DAG size: 13 (called from [L 269] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-02-15 02:24:59,397 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:24:59,397 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-02-15 02:24:59,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:24:59,398 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:24:59,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:24:59,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:24:59,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:24:59,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:24:59,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:24:59,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-15 02:24:59,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:24:59,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-02-15 02:24:59,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:24:59,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-02-15 02:24:59,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:24:59,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-02-15 02:24:59,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:24:59,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-02-15 02:24:59,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:24:59,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-02-15 02:24:59,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:24:59,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-02-15 02:24:59,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:24:59,718 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-15 02:24:59,718 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:24:59,718 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [740694506] [2022-02-15 02:24:59,718 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [740694506] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:24:59,718 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:24:59,718 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-15 02:24:59,718 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339096773] [2022-02-15 02:24:59,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:24:59,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 02:24:59,718 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:24:59,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 02:24:59,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2022-02-15 02:24:59,719 INFO L87 Difference]: Start difference. First operand 182 states and 230 transitions. Second operand has 17 states, 16 states have (on average 3.0625) internal successors, (49), 14 states have internal predecessors, (49), 3 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-02-15 02:25:01,823 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-02-15 02:25:03,954 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-02-15 02:25:04,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:25:04,814 INFO L93 Difference]: Finished difference Result 222 states and 277 transitions. [2022-02-15 02:25:04,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 02:25:04,814 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.0625) internal successors, (49), 14 states have internal predecessors, (49), 3 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 78 [2022-02-15 02:25:04,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:25:04,817 INFO L225 Difference]: With dead ends: 222 [2022-02-15 02:25:04,817 INFO L226 Difference]: Without dead ends: 204 [2022-02-15 02:25:04,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2022-02-15 02:25:04,818 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 116 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 51 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 916 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:25:04,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 70 Invalid, 969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 916 Invalid, 2 Unknown, 0 Unchecked, 4.8s Time] [2022-02-15 02:25:04,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-02-15 02:25:04,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 182. [2022-02-15 02:25:04,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 138 states have (on average 1.2246376811594204) internal successors, (169), 146 states have internal predecessors, (169), 26 states have call successors, (26), 14 states have call predecessors, (26), 17 states have return successors, (33), 21 states have call predecessors, (33), 21 states have call successors, (33) [2022-02-15 02:25:04,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 228 transitions. [2022-02-15 02:25:04,857 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 228 transitions. Word has length 78 [2022-02-15 02:25:04,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:25:04,858 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 228 transitions. [2022-02-15 02:25:04,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.0625) internal successors, (49), 14 states have internal predecessors, (49), 3 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-02-15 02:25:04,858 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 228 transitions. [2022-02-15 02:25:04,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-02-15 02:25:04,859 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:25:04,859 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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, 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, 1] [2022-02-15 02:25:04,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-15 02:25:04,859 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:25:04,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:25:04,859 INFO L85 PathProgramCache]: Analyzing trace with hash -2052199378, now seen corresponding path program 11 times [2022-02-15 02:25:04,859 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:25:04,859 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [69469331] [2022-02-15 02:25:04,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:25:04,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:25:04,861 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:25:04,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:25:04,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:25:04,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:25:04,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:25:04,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:25:04,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-15 02:25:04,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:25:04,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:25:04,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:25:04,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-15 02:25:04,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:25:04,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-15 02:25:04,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:25:04,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-15 02:25:04,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:25:04,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-02-15 02:25:04,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:25:05,034 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-15 02:25:05,035 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:25:05,035 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [69469331] [2022-02-15 02:25:05,035 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [69469331] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:25:05,035 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:25:05,035 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-15 02:25:05,035 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011044694] [2022-02-15 02:25:05,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:25:05,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 02:25:05,035 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:25:05,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 02:25:05,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2022-02-15 02:25:05,036 INFO L87 Difference]: Start difference. First operand 182 states and 228 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 13 states have internal predecessors, (49), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-02-15 02:25:07,115 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-02-15 02:25:07,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:25:07,893 INFO L93 Difference]: Finished difference Result 199 states and 246 transitions. [2022-02-15 02:25:07,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 02:25:07,893 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 13 states have internal predecessors, (49), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 78 [2022-02-15 02:25:07,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:25:07,895 INFO L225 Difference]: With dead ends: 199 [2022-02-15 02:25:07,895 INFO L226 Difference]: Without dead ends: 187 [2022-02-15 02:25:07,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=823, Unknown=0, NotChecked=0, Total=992 [2022-02-15 02:25:07,896 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 89 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 823 mSolverCounterSat, 57 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 823 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:25:07,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 70 Invalid, 881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 823 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2022-02-15 02:25:07,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-02-15 02:25:07,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 182. [2022-02-15 02:25:07,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 138 states have (on average 1.2246376811594204) internal successors, (169), 146 states have internal predecessors, (169), 26 states have call successors, (26), 14 states have call predecessors, (26), 17 states have return successors, (31), 21 states have call predecessors, (31), 21 states have call successors, (31) [2022-02-15 02:25:07,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 226 transitions. [2022-02-15 02:25:07,933 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 226 transitions. Word has length 78 [2022-02-15 02:25:07,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:25:07,933 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 226 transitions. [2022-02-15 02:25:07,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 13 states have internal predecessors, (49), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-02-15 02:25:07,933 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 226 transitions. [2022-02-15 02:25:07,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-02-15 02:25:07,934 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:25:07,934 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 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] [2022-02-15 02:25:07,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-15 02:25:07,934 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:25:07,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:25:07,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1971107334, now seen corresponding path program 12 times [2022-02-15 02:25:07,935 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:25:07,935 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [763262919] [2022-02-15 02:25:07,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:25:07,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:25:07,936 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:25:07,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:25:08,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:25:08,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:25:08,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:25:08,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:25:08,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-15 02:25:08,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:25:08,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:25:08,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:25:08,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-15 02:25:08,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:25:08,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-15 02:25:08,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:25:08,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-02-15 02:25:08,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:25:08,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-15 02:25:08,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:25:08,280 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-15 02:25:08,280 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:25:08,280 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [763262919] [2022-02-15 02:25:08,280 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [763262919] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:25:08,280 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:25:08,280 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-15 02:25:08,280 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169058915] [2022-02-15 02:25:08,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:25:08,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 02:25:08,281 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:25:08,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 02:25:08,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2022-02-15 02:25:08,281 INFO L87 Difference]: Start difference. First operand 182 states and 226 transitions. Second operand has 20 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 17 states have internal predecessors, (54), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-15 02:25:09,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:25:09,410 INFO L93 Difference]: Finished difference Result 251 states and 312 transitions. [2022-02-15 02:25:09,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 02:25:09,410 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 17 states have internal predecessors, (54), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 79 [2022-02-15 02:25:09,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:25:09,411 INFO L225 Difference]: With dead ends: 251 [2022-02-15 02:25:09,412 INFO L226 Difference]: Without dead ends: 239 [2022-02-15 02:25:09,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=176, Invalid=1384, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 02:25:09,413 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 128 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 1349 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 1429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:25:09,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 75 Invalid, 1429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1349 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 02:25:09,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-02-15 02:25:09,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 201. [2022-02-15 02:25:09,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 154 states have (on average 1.2337662337662338) internal successors, (190), 164 states have internal predecessors, (190), 27 states have call successors, (27), 14 states have call predecessors, (27), 19 states have return successors, (33), 22 states have call predecessors, (33), 22 states have call successors, (33) [2022-02-15 02:25:09,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 250 transitions. [2022-02-15 02:25:09,457 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 250 transitions. Word has length 79 [2022-02-15 02:25:09,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:25:09,457 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 250 transitions. [2022-02-15 02:25:09,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 17 states have internal predecessors, (54), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-15 02:25:09,457 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 250 transitions. [2022-02-15 02:25:09,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-02-15 02:25:09,458 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:25:09,458 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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, 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] [2022-02-15 02:25:09,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-15 02:25:09,459 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:25:09,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:25:09,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1406881591, now seen corresponding path program 13 times [2022-02-15 02:25:09,459 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:25:09,459 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1533843721] [2022-02-15 02:25:09,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:25:09,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:25:09,461 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:25:09,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:25:09,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:25:09,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:25:09,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:25:09,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:25:09,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-15 02:25:09,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:25:09,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:25:09,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:25:09,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-15 02:25:09,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:25:09,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-15 02:25:09,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:25:09,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-15 02:25:09,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:25:09,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-02-15 02:25:09,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:25:09,872 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-15 02:25:09,872 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:25:09,872 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1533843721] [2022-02-15 02:25:09,872 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1533843721] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:25:09,872 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:25:09,872 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-15 02:25:09,872 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680260076] [2022-02-15 02:25:09,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:25:09,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 02:25:09,873 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:25:09,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 02:25:09,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2022-02-15 02:25:09,873 INFO L87 Difference]: Start difference. First operand 201 states and 250 transitions. Second operand has 20 states, 19 states have (on average 2.789473684210526) internal successors, (53), 17 states have internal predecessors, (53), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-15 02:25:11,982 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-02-15 02:25:13,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:25:13,015 INFO L93 Difference]: Finished difference Result 253 states and 314 transitions. [2022-02-15 02:25:13,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 02:25:13,015 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.789473684210526) internal successors, (53), 17 states have internal predecessors, (53), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 79 [2022-02-15 02:25:13,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:25:13,016 INFO L225 Difference]: With dead ends: 253 [2022-02-15 02:25:13,016 INFO L226 Difference]: Without dead ends: 241 [2022-02-15 02:25:13,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=158, Invalid=1174, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 02:25:13,018 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 114 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 1279 mSolverCounterSat, 86 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 1366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1279 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:25:13,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 75 Invalid, 1366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1279 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2022-02-15 02:25:13,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-02-15 02:25:13,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 201. [2022-02-15 02:25:13,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 154 states have (on average 1.2337662337662338) internal successors, (190), 164 states have internal predecessors, (190), 27 states have call successors, (27), 14 states have call predecessors, (27), 19 states have return successors, (33), 22 states have call predecessors, (33), 22 states have call successors, (33) [2022-02-15 02:25:13,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 250 transitions. [2022-02-15 02:25:13,061 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 250 transitions. Word has length 79 [2022-02-15 02:25:13,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:25:13,061 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 250 transitions. [2022-02-15 02:25:13,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.789473684210526) internal successors, (53), 17 states have internal predecessors, (53), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-15 02:25:13,061 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 250 transitions. [2022-02-15 02:25:13,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-02-15 02:25:13,062 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:25:13,062 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 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, 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] [2022-02-15 02:25:13,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-15 02:25:13,062 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:25:13,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:25:13,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1520136901, now seen corresponding path program 14 times [2022-02-15 02:25:13,063 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:25:13,063 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [576444067] [2022-02-15 02:25:13,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:25:13,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:25:13,064 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:25:13,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:25:13,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:25:13,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:25:13,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:25:13,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:25:13,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-15 02:25:13,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:25:13,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:25:13,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:25:13,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-15 02:25:13,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:25:13,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-15 02:25:13,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:25:13,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-02-15 02:25:13,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:25:13,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-02-15 02:25:13,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:25:13,240 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-15 02:25:13,240 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:25:13,241 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [576444067] [2022-02-15 02:25:13,241 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [576444067] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:25:13,241 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:25:13,241 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 02:25:13,241 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21952395] [2022-02-15 02:25:13,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:25:13,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 02:25:13,241 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:25:13,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 02:25:13,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-02-15 02:25:13,242 INFO L87 Difference]: Start difference. First operand 201 states and 250 transitions. Second operand has 16 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-15 02:25:14,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:25:14,043 INFO L93 Difference]: Finished difference Result 288 states and 358 transitions. [2022-02-15 02:25:14,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 02:25:14,043 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 80 [2022-02-15 02:25:14,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:25:14,044 INFO L225 Difference]: With dead ends: 288 [2022-02-15 02:25:14,044 INFO L226 Difference]: Without dead ends: 213 [2022-02-15 02:25:14,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=176, Invalid=880, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 02:25:14,045 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 107 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 857 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:25:14,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 66 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 857 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 02:25:14,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-02-15 02:25:14,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 191. [2022-02-15 02:25:14,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 145 states have (on average 1.2275862068965517) internal successors, (178), 154 states have internal predecessors, (178), 27 states have call successors, (27), 14 states have call predecessors, (27), 18 states have return successors, (32), 22 states have call predecessors, (32), 22 states have call successors, (32) [2022-02-15 02:25:14,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 237 transitions. [2022-02-15 02:25:14,092 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 237 transitions. Word has length 80 [2022-02-15 02:25:14,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:25:14,093 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 237 transitions. [2022-02-15 02:25:14,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-15 02:25:14,093 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 237 transitions. [2022-02-15 02:25:14,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-02-15 02:25:14,094 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:25:14,094 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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, 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] [2022-02-15 02:25:14,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-15 02:25:14,094 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:25:14,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:25:14,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1163958224, now seen corresponding path program 15 times [2022-02-15 02:25:14,094 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:25:14,095 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1951729320] [2022-02-15 02:25:14,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:25:14,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:25:14,097 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:25:14,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:25:18,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:25:18,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:25:18,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:25:18,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:25:18,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-15 02:25:18,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:25:18,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:25:18,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:25:18,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-15 02:25:18,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:25:18,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-15 02:25:18,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:25:18,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-15 02:25:18,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:25:19,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-02-15 02:25:20,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat