/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/loops-crafted-1/nested_delay_nd.c
--------------------------------------------------------------------------------
This is Ultimate 0.2.2-dev-6c470ae
[2022-02-15 02:05:19,298 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2022-02-15 02:05:19,301 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
[2022-02-15 02:05:19,343 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2022-02-15 02:05:19,344 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2022-02-15 02:05:19,346 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2022-02-15 02:05:19,348 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2022-02-15 02:05:19,351 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values
[2022-02-15 02:05:19,353 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values
[2022-02-15 02:05:19,357 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values
[2022-02-15 02:05:19,357 INFO L181 SettingsManager]: Resetting Sifa preferences to default values
[2022-02-15 02:05:19,358 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2022-02-15 02:05:19,359 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values
[2022-02-15 02:05:19,363 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values
[2022-02-15 02:05:19,364 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2022-02-15 02:05:19,367 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values
[2022-02-15 02:05:19,367 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2022-02-15 02:05:19,368 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2022-02-15 02:05:19,370 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2022-02-15 02:05:19,374 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values
[2022-02-15 02:05:19,375 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2022-02-15 02:05:19,376 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values
[2022-02-15 02:05:19,378 INFO L181 SettingsManager]: Resetting Referee preferences to default values
[2022-02-15 02:05:19,378 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values
[2022-02-15 02:05:19,384 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2022-02-15 02:05:19,384 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2022-02-15 02:05:19,385 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values
[2022-02-15 02:05:19,386 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values
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[2022-02-15 02:05:19,387 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring...
[2022-02-15 02:05:19,387 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values
[2022-02-15 02:05:19,387 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2022-02-15 02:05:19,389 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values
[2022-02-15 02:05:19,389 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values
[2022-02-15 02:05:19,391 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
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[2022-02-15 02:05:19,391 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values
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[2022-02-15 02:05:19,393 INFO L188 SettingsManager]: Finished resetting all preferences to default values...
[2022-02-15 02:05:19,393 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 02:05:19,403 INFO L113 SettingsManager]: Loading preferences was successful
[2022-02-15 02:05:19,403 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2022-02-15 02:05:19,404 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2022-02-15 02:05:19,404 INFO L138 SettingsManager]: * sizeof long=4
[2022-02-15 02:05:19,404 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2022-02-15 02:05:19,404 INFO L138 SettingsManager]: * sizeof POINTER=4
[2022-02-15 02:05:19,404 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2022-02-15 02:05:19,404 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2022-02-15 02:05:19,404 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2022-02-15 02:05:19,405 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2022-02-15 02:05:19,405 INFO L138 SettingsManager]: * sizeof long double=12
[2022-02-15 02:05:19,405 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2022-02-15 02:05:19,405 INFO L138 SettingsManager]: * Use constant arrays=true
[2022-02-15 02:05:19,405 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2022-02-15 02:05:19,405 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2022-02-15 02:05:19,405 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements
[2022-02-15 02:05:19,406 INFO L138 SettingsManager]: * To the following directory=./dump/
[2022-02-15 02:05:19,406 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2022-02-15 02:05:19,406 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-02-15 02:05:19,406 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2022-02-15 02:05:19,406 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation
[2022-02-15 02:05:19,406 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2022-02-15 02:05:19,406 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN
[2022-02-15 02:05:19,406 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN;
[2022-02-15 02:05:19,601 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp
[2022-02-15 02:05:19,621 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2022-02-15 02:05:19,623 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2022-02-15 02:05:19,624 INFO L271 PluginConnector]: Initializing CDTParser...
[2022-02-15 02:05:19,625 INFO L275 PluginConnector]: CDTParser initialized
[2022-02-15 02:05:19,626 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/nested_delay_nd.c
[2022-02-15 02:05:19,683 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cfe187888/dd7963f0f0044133bd503a4990aad8a0/FLAGf2c256c5d
[2022-02-15 02:05:20,015 INFO L306 CDTParser]: Found 1 translation units.
[2022-02-15 02:05:20,015 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested_delay_nd.c
[2022-02-15 02:05:20,025 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cfe187888/dd7963f0f0044133bd503a4990aad8a0/FLAGf2c256c5d
[2022-02-15 02:05:20,447 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cfe187888/dd7963f0f0044133bd503a4990aad8a0
[2022-02-15 02:05:20,449 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2022-02-15 02:05:20,450 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements.
[2022-02-15 02:05:20,454 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2022-02-15 02:05:20,454 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2022-02-15 02:05:20,457 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2022-02-15 02:05:20,457 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 02:05:20" (1/1) ...
[2022-02-15 02:05:20,458 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c0b3349 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:05:20, skipping insertion in model container
[2022-02-15 02:05:20,458 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 02:05:20" (1/1) ...
[2022-02-15 02:05:20,465 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2022-02-15 02:05:20,476 INFO L178 MainTranslator]: Built tables and reachable declarations
[2022-02-15 02:05:20,609 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested_delay_nd.c[465,478]
[2022-02-15 02:05:20,621 INFO L210 PostProcessor]: Analyzing one entry point: main
[2022-02-15 02:05:20,627 INFO L203 MainTranslator]: Completed pre-run
[2022-02-15 02:05:20,636 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested_delay_nd.c[465,478]
[2022-02-15 02:05:20,641 INFO L210 PostProcessor]: Analyzing one entry point: main
[2022-02-15 02:05:20,656 INFO L208 MainTranslator]: Completed translation
[2022-02-15 02:05:20,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:05:20 WrapperNode
[2022-02-15 02:05:20,656 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2022-02-15 02:05:20,657 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2022-02-15 02:05:20,657 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2022-02-15 02:05:20,657 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2022-02-15 02:05:20,667 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:05:20" (1/1) ...
[2022-02-15 02:05:20,667 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:05:20" (1/1) ...
[2022-02-15 02:05:20,671 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:05:20" (1/1) ...
[2022-02-15 02:05:20,672 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:05:20" (1/1) ...
[2022-02-15 02:05:20,675 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:05:20" (1/1) ...
[2022-02-15 02:05:20,679 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:05:20" (1/1) ...
[2022-02-15 02:05:20,680 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:05:20" (1/1) ...
[2022-02-15 02:05:20,681 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2022-02-15 02:05:20,682 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2022-02-15 02:05:20,682 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2022-02-15 02:05:20,682 INFO L275 PluginConnector]: RCFGBuilder initialized
[2022-02-15 02:05:20,683 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:05:20" (1/1) ...
[2022-02-15 02:05:20,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-02-15 02:05:20,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 02:05:20,715 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 02:05:20,732 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 02:05:20,760 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2022-02-15 02:05:20,760 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2022-02-15 02:05:20,760 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error
[2022-02-15 02:05:20,760 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2022-02-15 02:05:20,761 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2022-02-15 02:05:20,761 INFO L138 BoogieDeclarations]: Found implementation of procedure main
[2022-02-15 02:05:20,761 INFO L130 BoogieDeclarations]: Found specification of procedure abort
[2022-02-15 02:05:20,761 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail
[2022-02-15 02:05:20,761 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error
[2022-02-15 02:05:20,761 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2022-02-15 02:05:20,761 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2022-02-15 02:05:20,761 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2022-02-15 02:05:20,762 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2022-02-15 02:05:20,762 INFO L130 BoogieDeclarations]: Found specification of procedure main
[2022-02-15 02:05:20,762 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2022-02-15 02:05:20,762 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int
[2022-02-15 02:05:20,762 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2022-02-15 02:05:20,762 INFO L130 BoogieDeclarations]: Found specification of procedure write~int
[2022-02-15 02:05:20,762 INFO L130 BoogieDeclarations]: Found specification of procedure read~int
[2022-02-15 02:05:20,762 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2022-02-15 02:05:20,817 INFO L234 CfgBuilder]: Building ICFG
[2022-02-15 02:05:20,819 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation
[2022-02-15 02:05:20,962 INFO L275 CfgBuilder]: Performing block encoding
[2022-02-15 02:05:20,968 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2022-02-15 02:05:20,968 INFO L299 CfgBuilder]: Removed 2 assume(true) statements.
[2022-02-15 02:05:20,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 02:05:20 BoogieIcfgContainer
[2022-02-15 02:05:20,970 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2022-02-15 02:05:20,977 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2022-02-15 02:05:20,977 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2022-02-15 02:05:20,985 INFO L275 PluginConnector]: TraceAbstraction initialized
[2022-02-15 02:05:20,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 02:05:20" (1/3) ...
[2022-02-15 02:05:20,986 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7197ff15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 02:05:20, skipping insertion in model container
[2022-02-15 02:05:20,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:05:20" (2/3) ...
[2022-02-15 02:05:20,986 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7197ff15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 02:05:20, skipping insertion in model container
[2022-02-15 02:05:20,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 02:05:20" (3/3) ...
[2022-02-15 02:05:20,988 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_delay_nd.c
[2022-02-15 02:05:20,993 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION
[2022-02-15 02:05:20,993 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2022-02-15 02:05:21,043 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2022-02-15 02:05:21,056 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 02:05:21,056 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2022-02-15 02:05:21,079 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 24 states have internal predecessors, (34), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4)
[2022-02-15 02:05:21,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2022-02-15 02:05:21,098 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:05:21,099 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 02:05:21,099 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:05:21,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:05:21,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1039138334, now seen corresponding path program 1 times
[2022-02-15 02:05:21,118 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:05:21,119 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1897833071]
[2022-02-15 02:05:21,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:05:21,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:05:21,181 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2022-02-15 02:05:21,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:21,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:05:21,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:21,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:05:21,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:21,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:05:21,377 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:05:21,378 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1897833071]
[2022-02-15 02:05:21,379 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1897833071] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:05:21,379 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:05:21,379 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2022-02-15 02:05:21,380 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112662249]
[2022-02-15 02:05:21,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:05:21,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-02-15 02:05:21,385 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:05:21,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-02-15 02:05:21,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-02-15 02:05:21,412 INFO L87 Difference]: Start difference. First operand has 32 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 24 states have internal predecessors, (34), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2)
[2022-02-15 02:05:21,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:05:21,469 INFO L93 Difference]: Finished difference Result 50 states and 71 transitions.
[2022-02-15 02:05:21,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2022-02-15 02:05:21,472 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21
[2022-02-15 02:05:21,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:05:21,485 INFO L225 Difference]: With dead ends: 50
[2022-02-15 02:05:21,485 INFO L226 Difference]: Without dead ends: 27
[2022-02-15 02:05:21,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-02-15 02:05:21,495 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 8 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-02-15 02:05:21,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 35 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-02-15 02:05:21,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states.
[2022-02-15 02:05:21,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27.
[2022-02-15 02:05:21,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3)
[2022-02-15 02:05:21,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions.
[2022-02-15 02:05:21,532 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 21
[2022-02-15 02:05:21,532 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:05:21,533 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions.
[2022-02-15 02:05:21,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2)
[2022-02-15 02:05:21,533 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions.
[2022-02-15 02:05:21,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2022-02-15 02:05:21,534 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:05:21,534 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 02:05:21,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2022-02-15 02:05:21,535 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:05:21,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:05:21,535 INFO L85 PathProgramCache]: Analyzing trace with hash 677978447, now seen corresponding path program 1 times
[2022-02-15 02:05:21,535 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:05:21,536 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1289525866]
[2022-02-15 02:05:21,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:05:21,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:05:21,538 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2022-02-15 02:05:21,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:21,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:05:21,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:21,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:05:21,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:21,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:05:21,691 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:05:21,691 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1289525866]
[2022-02-15 02:05:21,691 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1289525866] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:05:21,692 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:05:21,692 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2022-02-15 02:05:21,692 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178711001]
[2022-02-15 02:05:21,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:05:21,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2022-02-15 02:05:21,693 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:05:21,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2022-02-15 02:05:21,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2022-02-15 02:05:21,694 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:05:21,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:05:21,802 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions.
[2022-02-15 02:05:21,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states.
[2022-02-15 02:05:21,804 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21
[2022-02-15 02:05:21,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:05:21,805 INFO L225 Difference]: With dead ends: 46
[2022-02-15 02:05:21,806 INFO L226 Difference]: Without dead ends: 31
[2022-02-15 02:05:21,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30
[2022-02-15 02:05:21,807 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 39 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-02-15 02:05:21,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 25 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-02-15 02:05:21,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states.
[2022-02-15 02:05:21,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28.
[2022-02-15 02:05:21,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3)
[2022-02-15 02:05:21,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions.
[2022-02-15 02:05:21,817 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 21
[2022-02-15 02:05:21,817 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:05:21,817 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions.
[2022-02-15 02:05:21,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:05:21,818 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions.
[2022-02-15 02:05:21,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25
[2022-02-15 02:05:21,818 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:05:21,818 INFO L514 BasicCegarLoop]: trace histogram [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 02:05:21,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2022-02-15 02:05:21,819 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:05:21,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:05:21,821 INFO L85 PathProgramCache]: Analyzing trace with hash -673447056, now seen corresponding path program 1 times
[2022-02-15 02:05:21,822 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:05:21,822 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1129432837]
[2022-02-15 02:05:21,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:05:22,008 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:22,008 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE
[2022-02-15 02:05:22,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:05:22,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:22,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:05:22,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:22,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:05:22,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:22,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:05:22,137 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:05:22,137 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1129432837]
[2022-02-15 02:05:22,138 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1129432837] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:05:22,139 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:05:22,139 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2022-02-15 02:05:22,139 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673780143]
[2022-02-15 02:05:22,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:05:22,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2022-02-15 02:05:22,140 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:05:22,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2022-02-15 02:05:22,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42
[2022-02-15 02:05:22,141 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2)
[2022-02-15 02:05:22,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:05:22,295 INFO L93 Difference]: Finished difference Result 59 states and 82 transitions.
[2022-02-15 02:05:22,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states.
[2022-02-15 02:05:22,295 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24
[2022-02-15 02:05:22,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:05:22,297 INFO L225 Difference]: With dead ends: 59
[2022-02-15 02:05:22,297 INFO L226 Difference]: Without dead ends: 43
[2022-02-15 02:05:22,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56
[2022-02-15 02:05:22,299 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 30 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-02-15 02:05:22,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 43 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-02-15 02:05:22,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states.
[2022-02-15 02:05:22,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 35.
[2022-02-15 02:05:22,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 28 states have internal predecessors, (36), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3)
[2022-02-15 02:05:22,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions.
[2022-02-15 02:05:22,312 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 24
[2022-02-15 02:05:22,312 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:05:22,312 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions.
[2022-02-15 02:05:22,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2)
[2022-02-15 02:05:22,312 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions.
[2022-02-15 02:05:22,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25
[2022-02-15 02:05:22,313 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:05:22,313 INFO L514 BasicCegarLoop]: trace histogram [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 02:05:22,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2022-02-15 02:05:22,313 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:05:22,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:05:22,314 INFO L85 PathProgramCache]: Analyzing trace with hash 708533296, now seen corresponding path program 1 times
[2022-02-15 02:05:22,314 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:05:22,314 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [9485047]
[2022-02-15 02:05:22,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:05:22,399 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:22,400 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE
[2022-02-15 02:05:22,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:05:22,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:22,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:05:22,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:22,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:05:22,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:22,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:05:22,509 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:05:22,510 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [9485047]
[2022-02-15 02:05:22,510 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [9485047] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:05:22,510 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:05:22,510 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2022-02-15 02:05:22,510 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136227508]
[2022-02-15 02:05:22,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:05:22,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2022-02-15 02:05:22,511 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:05:22,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2022-02-15 02:05:22,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42
[2022-02-15 02:05:22,512 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2)
[2022-02-15 02:05:22,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:05:22,607 INFO L93 Difference]: Finished difference Result 64 states and 85 transitions.
[2022-02-15 02:05:22,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states.
[2022-02-15 02:05:22,607 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24
[2022-02-15 02:05:22,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:05:22,608 INFO L225 Difference]: With dead ends: 64
[2022-02-15 02:05:22,608 INFO L226 Difference]: Without dead ends: 41
[2022-02-15 02:05:22,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56
[2022-02-15 02:05:22,610 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 22 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-02-15 02:05:22,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 52 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-02-15 02:05:22,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states.
[2022-02-15 02:05:22,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34.
[2022-02-15 02:05:22,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3)
[2022-02-15 02:05:22,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions.
[2022-02-15 02:05:22,619 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 24
[2022-02-15 02:05:22,620 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:05:22,620 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions.
[2022-02-15 02:05:22,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2)
[2022-02-15 02:05:22,620 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions.
[2022-02-15 02:05:22,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26
[2022-02-15 02:05:22,621 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:05:22,621 INFO L514 BasicCegarLoop]: trace histogram [1, 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 02:05:22,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2022-02-15 02:05:22,621 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:05:22,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:05:22,622 INFO L85 PathProgramCache]: Analyzing trace with hash -2061972965, now seen corresponding path program 1 times
[2022-02-15 02:05:22,622 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:05:22,622 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [759838144]
[2022-02-15 02:05:22,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:05:22,692 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:22,692 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE
[2022-02-15 02:05:22,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:05:22,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:22,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:05:22,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:22,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:05:22,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:22,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:05:22,816 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:05:22,816 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [759838144]
[2022-02-15 02:05:22,816 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [759838144] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:05:22,817 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:05:22,817 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9
[2022-02-15 02:05:22,817 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007867343]
[2022-02-15 02:05:22,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:05:22,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states
[2022-02-15 02:05:22,817 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:05:22,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2022-02-15 02:05:22,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72
[2022-02-15 02:05:22,818 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:05:23,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:05:23,042 INFO L93 Difference]: Finished difference Result 77 states and 98 transitions.
[2022-02-15 02:05:23,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states.
[2022-02-15 02:05:23,043 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25
[2022-02-15 02:05:23,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:05:23,045 INFO L225 Difference]: With dead ends: 77
[2022-02-15 02:05:23,045 INFO L226 Difference]: Without dead ends: 55
[2022-02-15 02:05:23,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210
[2022-02-15 02:05:23,053 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 72 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-02-15 02:05:23,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 31 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-02-15 02:05:23,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states.
[2022-02-15 02:05:23,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 50.
[2022-02-15 02:05:23,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 42 states have internal predecessors, (53), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4)
[2022-02-15 02:05:23,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions.
[2022-02-15 02:05:23,069 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 25
[2022-02-15 02:05:23,070 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:05:23,070 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions.
[2022-02-15 02:05:23,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:05:23,070 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions.
[2022-02-15 02:05:23,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26
[2022-02-15 02:05:23,071 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:05:23,071 INFO L514 BasicCegarLoop]: trace histogram [1, 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 02:05:23,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2022-02-15 02:05:23,072 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:05:23,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:05:23,072 INFO L85 PathProgramCache]: Analyzing trace with hash -2060125923, now seen corresponding path program 1 times
[2022-02-15 02:05:23,072 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:05:23,072 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [720823831]
[2022-02-15 02:05:23,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:05:23,153 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:23,154 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE
[2022-02-15 02:05:23,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:05:23,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:23,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:05:23,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:23,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:05:23,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:23,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:05:23,332 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:05:23,332 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [720823831]
[2022-02-15 02:05:23,332 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [720823831] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:05:23,332 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:05:23,332 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9
[2022-02-15 02:05:23,332 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997582388]
[2022-02-15 02:05:23,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:05:23,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states
[2022-02-15 02:05:23,333 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:05:23,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2022-02-15 02:05:23,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110
[2022-02-15 02:05:23,334 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:05:23,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:05:23,531 INFO L93 Difference]: Finished difference Result 113 states and 146 transitions.
[2022-02-15 02:05:23,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states.
[2022-02-15 02:05:23,531 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25
[2022-02-15 02:05:23,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:05:23,532 INFO L225 Difference]: With dead ends: 113
[2022-02-15 02:05:23,532 INFO L226 Difference]: Without dead ends: 75
[2022-02-15 02:05:23,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182
[2022-02-15 02:05:23,533 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 62 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-02-15 02:05:23,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 28 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-02-15 02:05:23,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states.
[2022-02-15 02:05:23,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 60.
[2022-02-15 02:05:23,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 52 states have internal predecessors, (67), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4)
[2022-02-15 02:05:23,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 76 transitions.
[2022-02-15 02:05:23,548 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 76 transitions. Word has length 25
[2022-02-15 02:05:23,548 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:05:23,549 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 76 transitions.
[2022-02-15 02:05:23,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:05:23,549 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 76 transitions.
[2022-02-15 02:05:23,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26
[2022-02-15 02:05:23,550 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:05:23,550 INFO L514 BasicCegarLoop]: trace histogram [1, 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 02:05:23,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2022-02-15 02:05:23,550 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:05:23,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:05:23,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1425494747, now seen corresponding path program 1 times
[2022-02-15 02:05:23,550 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:05:23,551 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2095006711]
[2022-02-15 02:05:23,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:05:23,607 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:23,608 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE
[2022-02-15 02:05:23,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:05:23,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:23,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:05:23,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:23,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:05:23,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:23,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:05:23,880 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:05:23,881 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2095006711]
[2022-02-15 02:05:23,881 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2095006711] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:05:23,881 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:05:23,881 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13
[2022-02-15 02:05:23,881 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768316656]
[2022-02-15 02:05:23,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:05:23,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states
[2022-02-15 02:05:23,882 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:05:23,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2022-02-15 02:05:23,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210
[2022-02-15 02:05:23,882 INFO L87 Difference]: Start difference. First operand 60 states and 76 transitions. Second operand has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 11 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:05:24,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:05:24,181 INFO L93 Difference]: Finished difference Result 88 states and 110 transitions.
[2022-02-15 02:05:24,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states.
[2022-02-15 02:05:24,181 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 11 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25
[2022-02-15 02:05:24,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:05:24,182 INFO L225 Difference]: With dead ends: 88
[2022-02-15 02:05:24,182 INFO L226 Difference]: Without dead ends: 86
[2022-02-15 02:05:24,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462
[2022-02-15 02:05:24,183 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 57 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-02-15 02:05:24,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 52 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2022-02-15 02:05:24,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states.
[2022-02-15 02:05:24,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 75.
[2022-02-15 02:05:24,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 64 states have (on average 1.28125) internal successors, (82), 65 states have internal predecessors, (82), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5)
[2022-02-15 02:05:24,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 93 transitions.
[2022-02-15 02:05:24,201 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 93 transitions. Word has length 25
[2022-02-15 02:05:24,201 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:05:24,201 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 93 transitions.
[2022-02-15 02:05:24,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 11 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:05:24,202 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 93 transitions.
[2022-02-15 02:05:24,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26
[2022-02-15 02:05:24,202 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:05:24,203 INFO L514 BasicCegarLoop]: trace histogram [1, 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 02:05:24,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6
[2022-02-15 02:05:24,203 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:05:24,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:05:24,203 INFO L85 PathProgramCache]: Analyzing trace with hash 2067453981, now seen corresponding path program 1 times
[2022-02-15 02:05:24,203 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:05:24,204 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [989444605]
[2022-02-15 02:05:24,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:05:24,267 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:24,268 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE
[2022-02-15 02:05:24,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:05:24,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:24,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:05:24,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:24,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:05:24,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:24,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:05:24,357 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:05:24,357 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [989444605]
[2022-02-15 02:05:24,357 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [989444605] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:05:24,357 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:05:24,357 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9
[2022-02-15 02:05:24,357 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996592147]
[2022-02-15 02:05:24,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:05:24,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states
[2022-02-15 02:05:24,358 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:05:24,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2022-02-15 02:05:24,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72
[2022-02-15 02:05:24,358 INFO L87 Difference]: Start difference. First operand 75 states and 93 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:05:24,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:05:24,537 INFO L93 Difference]: Finished difference Result 127 states and 163 transitions.
[2022-02-15 02:05:24,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states.
[2022-02-15 02:05:24,537 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25
[2022-02-15 02:05:24,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:05:24,539 INFO L225 Difference]: With dead ends: 127
[2022-02-15 02:05:24,539 INFO L226 Difference]: Without dead ends: 100
[2022-02-15 02:05:24,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132
[2022-02-15 02:05:24,540 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 72 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-02-15 02:05:24,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 47 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-02-15 02:05:24,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states.
[2022-02-15 02:05:24,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 96.
[2022-02-15 02:05:24,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 84 states have (on average 1.2976190476190477) internal successors, (109), 85 states have internal predecessors, (109), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6)
[2022-02-15 02:05:24,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 122 transitions.
[2022-02-15 02:05:24,562 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 122 transitions. Word has length 25
[2022-02-15 02:05:24,562 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:05:24,562 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 122 transitions.
[2022-02-15 02:05:24,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:05:24,563 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 122 transitions.
[2022-02-15 02:05:24,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26
[2022-02-15 02:05:24,563 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:05:24,564 INFO L514 BasicCegarLoop]: trace histogram [1, 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 02:05:24,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7
[2022-02-15 02:05:24,564 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:05:24,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:05:24,565 INFO L85 PathProgramCache]: Analyzing trace with hash 2069301023, now seen corresponding path program 1 times
[2022-02-15 02:05:24,565 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:05:24,565 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [56137742]
[2022-02-15 02:05:24,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:05:24,632 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:24,633 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE
[2022-02-15 02:05:24,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:05:24,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:24,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:05:24,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:24,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:05:24,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:24,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:05:24,883 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:05:24,883 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [56137742]
[2022-02-15 02:05:24,883 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [56137742] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:05:24,883 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:05:24,883 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13
[2022-02-15 02:05:24,883 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064729858]
[2022-02-15 02:05:24,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:05:24,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states
[2022-02-15 02:05:24,884 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:05:24,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2022-02-15 02:05:24,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210
[2022-02-15 02:05:24,884 INFO L87 Difference]: Start difference. First operand 96 states and 122 transitions. Second operand has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 11 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:05:25,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:05:25,216 INFO L93 Difference]: Finished difference Result 121 states and 153 transitions.
[2022-02-15 02:05:25,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states.
[2022-02-15 02:05:25,217 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 11 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25
[2022-02-15 02:05:25,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:05:25,217 INFO L225 Difference]: With dead ends: 121
[2022-02-15 02:05:25,218 INFO L226 Difference]: Without dead ends: 119
[2022-02-15 02:05:25,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506
[2022-02-15 02:05:25,218 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 55 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-02-15 02:05:25,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 58 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2022-02-15 02:05:25,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states.
[2022-02-15 02:05:25,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 110.
[2022-02-15 02:05:25,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 95 states have (on average 1.2947368421052632) internal successors, (123), 98 states have internal predecessors, (123), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:05:25,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 140 transitions.
[2022-02-15 02:05:25,241 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 140 transitions. Word has length 25
[2022-02-15 02:05:25,241 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:05:25,241 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 140 transitions.
[2022-02-15 02:05:25,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 11 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:05:25,242 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 140 transitions.
[2022-02-15 02:05:25,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29
[2022-02-15 02:05:25,242 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:05:25,243 INFO L514 BasicCegarLoop]: trace histogram [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]
[2022-02-15 02:05:25,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8
[2022-02-15 02:05:25,243 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:05:25,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:05:25,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1643345404, now seen corresponding path program 1 times
[2022-02-15 02:05:25,244 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:05:25,244 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1757755176]
[2022-02-15 02:05:25,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:05:25,292 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:25,293 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE
[2022-02-15 02:05:25,343 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:25,408 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:25,409 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:05:25,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:05:25,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:25,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:05:25,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:25,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:05:25,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:25,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:05:25,645 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:05:25,645 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1757755176]
[2022-02-15 02:05:25,645 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1757755176] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:05:25,646 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:05:25,646 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11
[2022-02-15 02:05:25,646 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196481350]
[2022-02-15 02:05:25,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:05:25,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states
[2022-02-15 02:05:25,646 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:05:25,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2022-02-15 02:05:25,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156
[2022-02-15 02:05:25,647 INFO L87 Difference]: Start difference. First operand 110 states and 140 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:05:25,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:05:25,862 INFO L93 Difference]: Finished difference Result 227 states and 298 transitions.
[2022-02-15 02:05:25,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states.
[2022-02-15 02:05:25,863 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28
[2022-02-15 02:05:25,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:05:25,864 INFO L225 Difference]: With dead ends: 227
[2022-02-15 02:05:25,864 INFO L226 Difference]: Without dead ends: 147
[2022-02-15 02:05:25,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240
[2022-02-15 02:05:25,868 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 48 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-02-15 02:05:25,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 40 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-02-15 02:05:25,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states.
[2022-02-15 02:05:25,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 128.
[2022-02-15 02:05:25,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 113 states have (on average 1.2831858407079646) internal successors, (145), 116 states have internal predecessors, (145), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:05:25,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 162 transitions.
[2022-02-15 02:05:25,898 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 162 transitions. Word has length 28
[2022-02-15 02:05:25,898 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:05:25,898 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 162 transitions.
[2022-02-15 02:05:25,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:05:25,899 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 162 transitions.
[2022-02-15 02:05:25,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32
[2022-02-15 02:05:25,903 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:05:25,903 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 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 02:05:25,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9
[2022-02-15 02:05:25,904 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:05:25,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:05:25,904 INFO L85 PathProgramCache]: Analyzing trace with hash -646101633, now seen corresponding path program 2 times
[2022-02-15 02:05:25,904 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:05:25,904 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1362898244]
[2022-02-15 02:05:25,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:05:25,974 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:26,036 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:26,036 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:05:26,086 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:26,147 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:26,147 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:05:26,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:05:26,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:26,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:05:26,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:26,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:05:26,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:26,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:05:26,441 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:05:26,441 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1362898244]
[2022-02-15 02:05:26,442 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1362898244] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:05:26,442 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:05:26,442 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12
[2022-02-15 02:05:26,442 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231035787]
[2022-02-15 02:05:26,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:05:26,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states
[2022-02-15 02:05:26,443 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:05:26,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants.
[2022-02-15 02:05:26,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182
[2022-02-15 02:05:26,444 INFO L87 Difference]: Start difference. First operand 128 states and 162 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:05:26,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:05:26,755 INFO L93 Difference]: Finished difference Result 240 states and 308 transitions.
[2022-02-15 02:05:26,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states.
[2022-02-15 02:05:26,755 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 31
[2022-02-15 02:05:26,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:05:26,756 INFO L225 Difference]: With dead ends: 240
[2022-02-15 02:05:26,756 INFO L226 Difference]: Without dead ends: 156
[2022-02-15 02:05:26,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272
[2022-02-15 02:05:26,758 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 47 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-02-15 02:05:26,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 44 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2022-02-15 02:05:26,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states.
[2022-02-15 02:05:26,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 137.
[2022-02-15 02:05:26,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 122 states have (on average 1.2622950819672132) internal successors, (154), 125 states have internal predecessors, (154), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:05:26,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 171 transitions.
[2022-02-15 02:05:26,782 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 171 transitions. Word has length 31
[2022-02-15 02:05:26,783 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:05:26,783 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 171 transitions.
[2022-02-15 02:05:26,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:05:26,783 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 171 transitions.
[2022-02-15 02:05:26,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32
[2022-02-15 02:05:26,784 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:05:26,784 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 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 02:05:26,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10
[2022-02-15 02:05:26,784 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:05:26,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:05:26,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1657218883, now seen corresponding path program 3 times
[2022-02-15 02:05:26,784 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:05:26,785 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [336011617]
[2022-02-15 02:05:26,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:05:26,847 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:26,848 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE
[2022-02-15 02:05:26,898 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:26,958 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:26,959 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:05:26,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:05:26,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:27,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:05:27,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:27,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:05:27,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:27,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:05:27,407 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:05:27,408 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [336011617]
[2022-02-15 02:05:27,408 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [336011617] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:05:27,408 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:05:27,408 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17
[2022-02-15 02:05:27,408 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700157325]
[2022-02-15 02:05:27,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:05:27,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states
[2022-02-15 02:05:27,409 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:05:27,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants.
[2022-02-15 02:05:27,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380
[2022-02-15 02:05:27,409 INFO L87 Difference]: Start difference. First operand 137 states and 171 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 15 states have internal predecessors, (25), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:05:27,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:05:27,726 INFO L93 Difference]: Finished difference Result 259 states and 327 transitions.
[2022-02-15 02:05:27,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states.
[2022-02-15 02:05:27,726 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 15 states have internal predecessors, (25), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 31
[2022-02-15 02:05:27,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:05:27,727 INFO L225 Difference]: With dead ends: 259
[2022-02-15 02:05:27,727 INFO L226 Difference]: Without dead ends: 155
[2022-02-15 02:05:27,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552
[2022-02-15 02:05:27,729 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 57 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-02-15 02:05:27,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 58 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2022-02-15 02:05:27,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states.
[2022-02-15 02:05:27,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 140.
[2022-02-15 02:05:27,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 125 states have (on average 1.264) internal successors, (158), 128 states have internal predecessors, (158), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:05:27,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 175 transitions.
[2022-02-15 02:05:27,773 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 175 transitions. Word has length 31
[2022-02-15 02:05:27,773 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:05:27,773 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 175 transitions.
[2022-02-15 02:05:27,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 15 states have internal predecessors, (25), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:05:27,775 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 175 transitions.
[2022-02-15 02:05:27,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35
[2022-02-15 02:05:27,776 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:05:27,777 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 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 02:05:27,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11
[2022-02-15 02:05:27,777 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:05:27,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:05:27,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1482120420, now seen corresponding path program 4 times
[2022-02-15 02:05:27,778 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:05:27,778 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [698233310]
[2022-02-15 02:05:27,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:05:27,832 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:27,895 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:27,896 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:05:27,969 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:28,027 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:28,027 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:05:28,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:05:28,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:28,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:05:28,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:28,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:05:28,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:28,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:05:28,325 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:05:28,325 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [698233310]
[2022-02-15 02:05:28,325 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [698233310] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:05:28,325 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:05:28,325 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13
[2022-02-15 02:05:28,325 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549202723]
[2022-02-15 02:05:28,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:05:28,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states
[2022-02-15 02:05:28,326 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:05:28,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2022-02-15 02:05:28,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210
[2022-02-15 02:05:28,328 INFO L87 Difference]: Start difference. First operand 140 states and 175 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:05:28,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:05:28,601 INFO L93 Difference]: Finished difference Result 262 states and 331 transitions.
[2022-02-15 02:05:28,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states.
[2022-02-15 02:05:28,601 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 34
[2022-02-15 02:05:28,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:05:28,602 INFO L225 Difference]: With dead ends: 262
[2022-02-15 02:05:28,602 INFO L226 Difference]: Without dead ends: 169
[2022-02-15 02:05:28,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306
[2022-02-15 02:05:28,603 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 49 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-02-15 02:05:28,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 39 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2022-02-15 02:05:28,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states.
[2022-02-15 02:05:28,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 149.
[2022-02-15 02:05:28,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 134 states have (on average 1.2462686567164178) internal successors, (167), 137 states have internal predecessors, (167), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:05:28,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 184 transitions.
[2022-02-15 02:05:28,627 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 184 transitions. Word has length 34
[2022-02-15 02:05:28,627 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:05:28,627 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 184 transitions.
[2022-02-15 02:05:28,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:05:28,627 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 184 transitions.
[2022-02-15 02:05:28,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35
[2022-02-15 02:05:28,628 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:05:28,628 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 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 02:05:28,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12
[2022-02-15 02:05:28,628 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:05:28,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:05:28,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1224498974, now seen corresponding path program 5 times
[2022-02-15 02:05:28,628 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:05:28,628 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1091468949]
[2022-02-15 02:05:28,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:05:28,686 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:28,740 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:28,740 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:05:28,803 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:28,845 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:28,845 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:05:28,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:05:28,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:28,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:05:28,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:28,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:05:28,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:28,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:05:29,112 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:05:29,112 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1091468949]
[2022-02-15 02:05:29,113 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1091468949] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:05:29,113 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:05:29,113 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14
[2022-02-15 02:05:29,113 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159088159]
[2022-02-15 02:05:29,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:05:29,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states
[2022-02-15 02:05:29,113 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:05:29,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants.
[2022-02-15 02:05:29,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240
[2022-02-15 02:05:29,114 INFO L87 Difference]: Start difference. First operand 149 states and 184 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:05:29,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:05:29,410 INFO L93 Difference]: Finished difference Result 296 states and 374 transitions.
[2022-02-15 02:05:29,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states.
[2022-02-15 02:05:29,410 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 34
[2022-02-15 02:05:29,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:05:29,411 INFO L225 Difference]: With dead ends: 296
[2022-02-15 02:05:29,411 INFO L226 Difference]: Without dead ends: 194
[2022-02-15 02:05:29,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342
[2022-02-15 02:05:29,413 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 55 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-02-15 02:05:29,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 41 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2022-02-15 02:05:29,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states.
[2022-02-15 02:05:29,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 158.
[2022-02-15 02:05:29,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 143 states have (on average 1.2517482517482517) internal successors, (179), 146 states have internal predecessors, (179), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:05:29,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 196 transitions.
[2022-02-15 02:05:29,440 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 196 transitions. Word has length 34
[2022-02-15 02:05:29,440 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:05:29,440 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 196 transitions.
[2022-02-15 02:05:29,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:05:29,441 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 196 transitions.
[2022-02-15 02:05:29,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35
[2022-02-15 02:05:29,441 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:05:29,441 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 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 02:05:29,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13
[2022-02-15 02:05:29,441 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:05:29,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:05:29,442 INFO L85 PathProgramCache]: Analyzing trace with hash 213381724, now seen corresponding path program 6 times
[2022-02-15 02:05:29,442 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:05:29,442 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [360337581]
[2022-02-15 02:05:29,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:05:29,494 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:29,494 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE
[2022-02-15 02:05:29,558 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:29,614 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:29,614 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:05:29,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:05:29,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:29,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:05:29,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:29,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:05:29,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:29,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:05:29,870 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:05:29,870 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [360337581]
[2022-02-15 02:05:29,870 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [360337581] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:05:29,870 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:05:29,870 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15
[2022-02-15 02:05:29,870 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897079904]
[2022-02-15 02:05:29,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:05:29,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states
[2022-02-15 02:05:29,871 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:05:29,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants.
[2022-02-15 02:05:29,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272
[2022-02-15 02:05:29,871 INFO L87 Difference]: Start difference. First operand 158 states and 196 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:05:30,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:05:30,204 INFO L93 Difference]: Finished difference Result 317 states and 402 transitions.
[2022-02-15 02:05:30,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states.
[2022-02-15 02:05:30,205 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 34
[2022-02-15 02:05:30,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:05:30,207 INFO L225 Difference]: With dead ends: 317
[2022-02-15 02:05:30,207 INFO L226 Difference]: Without dead ends: 195
[2022-02-15 02:05:30,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380
[2022-02-15 02:05:30,210 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 55 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-02-15 02:05:30,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 46 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2022-02-15 02:05:30,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states.
[2022-02-15 02:05:30,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 170.
[2022-02-15 02:05:30,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 155 states have (on average 1.2580645161290323) internal successors, (195), 158 states have internal predecessors, (195), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:05:30,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 212 transitions.
[2022-02-15 02:05:30,242 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 212 transitions. Word has length 34
[2022-02-15 02:05:30,242 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:05:30,242 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 212 transitions.
[2022-02-15 02:05:30,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:05:30,242 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 212 transitions.
[2022-02-15 02:05:30,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38
[2022-02-15 02:05:30,243 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:05:30,243 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 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 02:05:30,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14
[2022-02-15 02:05:30,243 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:05:30,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:05:30,244 INFO L85 PathProgramCache]: Analyzing trace with hash -802454433, now seen corresponding path program 7 times
[2022-02-15 02:05:30,244 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:05:30,244 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [250289972]
[2022-02-15 02:05:30,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:05:30,300 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:30,338 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:30,338 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:05:30,393 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:30,462 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:30,462 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:05:30,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:05:30,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:30,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:05:30,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:30,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:05:30,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:30,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:05:30,756 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:05:30,756 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [250289972]
[2022-02-15 02:05:30,757 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [250289972] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:05:30,757 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:05:30,757 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14
[2022-02-15 02:05:30,757 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264157600]
[2022-02-15 02:05:30,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:05:30,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states
[2022-02-15 02:05:30,757 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:05:30,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants.
[2022-02-15 02:05:30,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240
[2022-02-15 02:05:30,758 INFO L87 Difference]: Start difference. First operand 170 states and 212 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:05:31,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:05:31,050 INFO L93 Difference]: Finished difference Result 329 states and 411 transitions.
[2022-02-15 02:05:31,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states.
[2022-02-15 02:05:31,051 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 37
[2022-02-15 02:05:31,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:05:31,052 INFO L225 Difference]: With dead ends: 329
[2022-02-15 02:05:31,052 INFO L226 Difference]: Without dead ends: 209
[2022-02-15 02:05:31,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342
[2022-02-15 02:05:31,053 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 53 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-02-15 02:05:31,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 39 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2022-02-15 02:05:31,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states.
[2022-02-15 02:05:31,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 179.
[2022-02-15 02:05:31,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 164 states have (on average 1.2439024390243902) internal successors, (204), 167 states have internal predecessors, (204), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:05:31,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 221 transitions.
[2022-02-15 02:05:31,084 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 221 transitions. Word has length 37
[2022-02-15 02:05:31,084 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:05:31,084 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 221 transitions.
[2022-02-15 02:05:31,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:05:31,084 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 221 transitions.
[2022-02-15 02:05:31,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38
[2022-02-15 02:05:31,085 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:05:31,085 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 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 02:05:31,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15
[2022-02-15 02:05:31,085 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:05:31,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:05:31,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1620102883, now seen corresponding path program 8 times
[2022-02-15 02:05:31,085 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:05:31,085 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1829785158]
[2022-02-15 02:05:31,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:05:31,144 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:31,197 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:31,198 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:05:31,251 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:31,316 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:31,316 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:05:31,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:05:31,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:31,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:05:31,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:31,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:05:31,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:31,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:05:31,616 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:05:31,617 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1829785158]
[2022-02-15 02:05:31,617 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1829785158] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:05:31,617 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:05:31,617 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15
[2022-02-15 02:05:31,617 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358055852]
[2022-02-15 02:05:31,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:05:31,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states
[2022-02-15 02:05:31,617 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:05:31,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants.
[2022-02-15 02:05:31,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272
[2022-02-15 02:05:31,618 INFO L87 Difference]: Start difference. First operand 179 states and 221 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:05:32,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:05:32,008 INFO L93 Difference]: Finished difference Result 347 states and 429 transitions.
[2022-02-15 02:05:32,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states.
[2022-02-15 02:05:32,008 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 37
[2022-02-15 02:05:32,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:05:32,009 INFO L225 Difference]: With dead ends: 347
[2022-02-15 02:05:32,009 INFO L226 Difference]: Without dead ends: 218
[2022-02-15 02:05:32,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380
[2022-02-15 02:05:32,010 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 53 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2022-02-15 02:05:32,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 43 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2022-02-15 02:05:32,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states.
[2022-02-15 02:05:32,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 179.
[2022-02-15 02:05:32,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 164 states have (on average 1.2439024390243902) internal successors, (204), 167 states have internal predecessors, (204), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:05:32,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 221 transitions.
[2022-02-15 02:05:32,043 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 221 transitions. Word has length 37
[2022-02-15 02:05:32,043 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:05:32,043 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 221 transitions.
[2022-02-15 02:05:32,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:05:32,044 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 221 transitions.
[2022-02-15 02:05:32,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38
[2022-02-15 02:05:32,044 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:05:32,044 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 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 02:05:32,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16
[2022-02-15 02:05:32,044 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:05:32,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:05:32,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1086516511, now seen corresponding path program 9 times
[2022-02-15 02:05:32,045 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:05:32,045 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1679665019]
[2022-02-15 02:05:32,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:05:32,103 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:32,165 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:32,165 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:05:32,208 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:32,255 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:32,255 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:05:32,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:05:32,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:32,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:05:32,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:32,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:05:32,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:32,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:05:32,586 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:05:32,586 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1679665019]
[2022-02-15 02:05:32,586 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1679665019] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:05:32,586 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:05:32,586 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16
[2022-02-15 02:05:32,586 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404031241]
[2022-02-15 02:05:32,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:05:32,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states
[2022-02-15 02:05:32,587 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:05:32,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants.
[2022-02-15 02:05:32,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306
[2022-02-15 02:05:32,587 INFO L87 Difference]: Start difference. First operand 179 states and 221 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 15 states have internal predecessors, (31), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:05:32,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:05:32,912 INFO L93 Difference]: Finished difference Result 342 states and 424 transitions.
[2022-02-15 02:05:32,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states.
[2022-02-15 02:05:32,913 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 15 states have internal predecessors, (31), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 37
[2022-02-15 02:05:32,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:05:32,914 INFO L225 Difference]: With dead ends: 342
[2022-02-15 02:05:32,914 INFO L226 Difference]: Without dead ends: 213
[2022-02-15 02:05:32,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420
[2022-02-15 02:05:32,915 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 56 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-02-15 02:05:32,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 42 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2022-02-15 02:05:32,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states.
[2022-02-15 02:05:32,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 179.
[2022-02-15 02:05:32,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 164 states have (on average 1.2439024390243902) internal successors, (204), 167 states have internal predecessors, (204), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:05:32,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 221 transitions.
[2022-02-15 02:05:32,960 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 221 transitions. Word has length 37
[2022-02-15 02:05:32,960 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:05:32,960 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 221 transitions.
[2022-02-15 02:05:32,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 15 states have internal predecessors, (31), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:05:32,960 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 221 transitions.
[2022-02-15 02:05:32,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38
[2022-02-15 02:05:32,961 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:05:32,961 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 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 02:05:32,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17
[2022-02-15 02:05:32,961 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:05:32,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:05:32,962 INFO L85 PathProgramCache]: Analyzing trace with hash 75399261, now seen corresponding path program 10 times
[2022-02-15 02:05:32,962 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:05:32,962 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1559446406]
[2022-02-15 02:05:32,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:05:33,002 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:33,002 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE
[2022-02-15 02:05:33,067 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:33,121 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:33,121 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:05:33,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:05:33,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:33,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:05:33,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:33,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:05:33,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:33,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:05:33,400 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:05:33,400 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1559446406]
[2022-02-15 02:05:33,400 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1559446406] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:05:33,400 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:05:33,400 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17
[2022-02-15 02:05:33,400 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738459705]
[2022-02-15 02:05:33,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:05:33,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states
[2022-02-15 02:05:33,401 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:05:33,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants.
[2022-02-15 02:05:33,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342
[2022-02-15 02:05:33,401 INFO L87 Difference]: Start difference. First operand 179 states and 221 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:05:33,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:05:33,757 INFO L93 Difference]: Finished difference Result 356 states and 448 transitions.
[2022-02-15 02:05:33,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states.
[2022-02-15 02:05:33,758 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 37
[2022-02-15 02:05:33,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:05:33,759 INFO L225 Difference]: With dead ends: 356
[2022-02-15 02:05:33,759 INFO L226 Difference]: Without dead ends: 216
[2022-02-15 02:05:33,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462
[2022-02-15 02:05:33,760 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 53 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2022-02-15 02:05:33,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 54 Invalid, 759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 742 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2022-02-15 02:05:33,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states.
[2022-02-15 02:05:33,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 191.
[2022-02-15 02:05:33,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 176 states have (on average 1.25) internal successors, (220), 179 states have internal predecessors, (220), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:05:33,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 237 transitions.
[2022-02-15 02:05:33,794 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 237 transitions. Word has length 37
[2022-02-15 02:05:33,794 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:05:33,794 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 237 transitions.
[2022-02-15 02:05:33,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:05:33,794 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 237 transitions.
[2022-02-15 02:05:33,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40
[2022-02-15 02:05:33,795 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:05:33,795 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]
[2022-02-15 02:05:33,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18
[2022-02-15 02:05:33,795 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:05:33,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:05:33,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1742651763, now seen corresponding path program 1 times
[2022-02-15 02:05:33,796 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:05:33,796 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1117091681]
[2022-02-15 02:05:33,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:05:33,899 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:33,950 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:33,951 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:05:33,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:05:33,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:34,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:05:34,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:34,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:05:34,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:34,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:05:34,052 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:05:34,052 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1117091681]
[2022-02-15 02:05:34,053 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1117091681] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:05:34,053 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:05:34,053 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9
[2022-02-15 02:05:34,053 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051154355]
[2022-02-15 02:05:34,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:05:34,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states
[2022-02-15 02:05:34,053 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:05:34,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2022-02-15 02:05:34,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72
[2022-02-15 02:05:34,054 INFO L87 Difference]: Start difference. First operand 191 states and 237 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3)
[2022-02-15 02:05:34,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:05:34,175 INFO L93 Difference]: Finished difference Result 354 states and 440 transitions.
[2022-02-15 02:05:34,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states.
[2022-02-15 02:05:34,175 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 39
[2022-02-15 02:05:34,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:05:34,177 INFO L225 Difference]: With dead ends: 354
[2022-02-15 02:05:34,177 INFO L226 Difference]: Without dead ends: 207
[2022-02-15 02:05:34,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110
[2022-02-15 02:05:34,179 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 43 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-02-15 02:05:34,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 27 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-02-15 02:05:34,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states.
[2022-02-15 02:05:34,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 199.
[2022-02-15 02:05:34,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 184 states have (on average 1.2391304347826086) internal successors, (228), 187 states have internal predecessors, (228), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:05:34,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 245 transitions.
[2022-02-15 02:05:34,228 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 245 transitions. Word has length 39
[2022-02-15 02:05:34,228 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:05:34,228 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 245 transitions.
[2022-02-15 02:05:34,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3)
[2022-02-15 02:05:34,229 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 245 transitions.
[2022-02-15 02:05:34,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41
[2022-02-15 02:05:34,229 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:05:34,229 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 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 02:05:34,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19
[2022-02-15 02:05:34,229 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:05:34,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:05:34,230 INFO L85 PathProgramCache]: Analyzing trace with hash 651130940, now seen corresponding path program 11 times
[2022-02-15 02:05:34,230 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:05:34,230 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [241809727]
[2022-02-15 02:05:34,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:05:34,297 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:34,354 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:34,355 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:05:34,415 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:34,472 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:34,473 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:05:34,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:05:34,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:34,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:05:34,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:34,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:05:34,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:34,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:05:34,818 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:05:34,818 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [241809727]
[2022-02-15 02:05:34,818 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [241809727] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:05:34,818 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:05:34,818 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15
[2022-02-15 02:05:34,818 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840824355]
[2022-02-15 02:05:34,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:05:34,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states
[2022-02-15 02:05:34,818 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:05:34,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants.
[2022-02-15 02:05:34,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272
[2022-02-15 02:05:34,819 INFO L87 Difference]: Start difference. First operand 199 states and 245 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:05:35,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:05:35,168 INFO L93 Difference]: Finished difference Result 391 states and 480 transitions.
[2022-02-15 02:05:35,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states.
[2022-02-15 02:05:35,168 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 40
[2022-02-15 02:05:35,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:05:35,169 INFO L225 Difference]: With dead ends: 391
[2022-02-15 02:05:35,169 INFO L226 Difference]: Without dead ends: 247
[2022-02-15 02:05:35,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 9 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380
[2022-02-15 02:05:35,170 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 48 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-02-15 02:05:35,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 47 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2022-02-15 02:05:35,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states.
[2022-02-15 02:05:35,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 208.
[2022-02-15 02:05:35,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 193 states have (on average 1.2279792746113989) internal successors, (237), 196 states have internal predecessors, (237), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:05:35,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 254 transitions.
[2022-02-15 02:05:35,216 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 254 transitions. Word has length 40
[2022-02-15 02:05:35,216 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:05:35,216 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 254 transitions.
[2022-02-15 02:05:35,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:05:35,216 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 254 transitions.
[2022-02-15 02:05:35,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41
[2022-02-15 02:05:35,217 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:05:35,217 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 2, 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 02:05:35,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20
[2022-02-15 02:05:35,217 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:05:35,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:05:35,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1154307394, now seen corresponding path program 12 times
[2022-02-15 02:05:35,217 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:05:35,218 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [470580892]
[2022-02-15 02:05:35,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:05:35,282 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:35,338 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:35,338 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:05:35,376 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:35,420 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:35,420 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:05:35,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:05:35,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:35,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:05:35,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:35,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:05:35,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:35,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:05:35,759 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:05:35,760 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [470580892]
[2022-02-15 02:05:35,760 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [470580892] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:05:35,760 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:05:35,760 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16
[2022-02-15 02:05:35,760 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831631886]
[2022-02-15 02:05:35,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:05:35,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states
[2022-02-15 02:05:35,760 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:05:35,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants.
[2022-02-15 02:05:35,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306
[2022-02-15 02:05:35,761 INFO L87 Difference]: Start difference. First operand 208 states and 254 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:05:36,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:05:36,134 INFO L93 Difference]: Finished difference Result 409 states and 498 transitions.
[2022-02-15 02:05:36,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states.
[2022-02-15 02:05:36,134 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 40
[2022-02-15 02:05:36,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:05:36,137 INFO L225 Difference]: With dead ends: 409
[2022-02-15 02:05:36,137 INFO L226 Difference]: Without dead ends: 256
[2022-02-15 02:05:36,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 8 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420
[2022-02-15 02:05:36,138 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 56 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2022-02-15 02:05:36,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 42 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 635 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2022-02-15 02:05:36,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states.
[2022-02-15 02:05:36,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 208.
[2022-02-15 02:05:36,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 193 states have (on average 1.2279792746113989) internal successors, (237), 196 states have internal predecessors, (237), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:05:36,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 254 transitions.
[2022-02-15 02:05:36,177 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 254 transitions. Word has length 40
[2022-02-15 02:05:36,177 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:05:36,177 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 254 transitions.
[2022-02-15 02:05:36,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:05:36,177 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 254 transitions.
[2022-02-15 02:05:36,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41
[2022-02-15 02:05:36,177 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:05:36,177 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 02:05:36,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21
[2022-02-15 02:05:36,178 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:05:36,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:05:36,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1971955844, now seen corresponding path program 13 times
[2022-02-15 02:05:36,178 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:05:36,178 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1409984864]
[2022-02-15 02:05:36,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:05:36,232 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:36,279 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:36,280 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:05:36,327 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:36,373 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:36,374 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:05:36,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:05:36,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:36,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:05:36,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:36,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:05:36,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:36,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:05:36,690 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:05:36,691 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1409984864]
[2022-02-15 02:05:36,691 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1409984864] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:05:36,691 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:05:36,691 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17
[2022-02-15 02:05:36,691 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499793469]
[2022-02-15 02:05:36,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:05:36,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states
[2022-02-15 02:05:36,692 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:05:36,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants.
[2022-02-15 02:05:36,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342
[2022-02-15 02:05:36,692 INFO L87 Difference]: Start difference. First operand 208 states and 254 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:05:37,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:05:37,035 INFO L93 Difference]: Finished difference Result 400 states and 489 transitions.
[2022-02-15 02:05:37,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states.
[2022-02-15 02:05:37,036 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 40
[2022-02-15 02:05:37,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:05:37,037 INFO L225 Difference]: With dead ends: 400
[2022-02-15 02:05:37,037 INFO L226 Difference]: Without dead ends: 247
[2022-02-15 02:05:37,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 7 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462
[2022-02-15 02:05:37,038 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 55 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2022-02-15 02:05:37,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 45 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2022-02-15 02:05:37,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states.
[2022-02-15 02:05:37,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 208.
[2022-02-15 02:05:37,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 193 states have (on average 1.2279792746113989) internal successors, (237), 196 states have internal predecessors, (237), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:05:37,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 254 transitions.
[2022-02-15 02:05:37,088 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 254 transitions. Word has length 40
[2022-02-15 02:05:37,088 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:05:37,088 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 254 transitions.
[2022-02-15 02:05:37,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:05:37,089 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 254 transitions.
[2022-02-15 02:05:37,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41
[2022-02-15 02:05:37,089 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:05:37,089 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 2, 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 02:05:37,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22
[2022-02-15 02:05:37,090 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:05:37,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:05:37,090 INFO L85 PathProgramCache]: Analyzing trace with hash 734663550, now seen corresponding path program 14 times
[2022-02-15 02:05:37,090 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:05:37,090 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [540286864]
[2022-02-15 02:05:37,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:05:37,142 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:37,197 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:37,198 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:05:37,242 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:37,293 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:37,293 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:05:37,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:05:37,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:37,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:05:37,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:37,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:05:37,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:37,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:05:37,627 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:05:37,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [540286864]
[2022-02-15 02:05:37,627 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [540286864] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:05:37,627 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:05:37,627 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18
[2022-02-15 02:05:37,627 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955586990]
[2022-02-15 02:05:37,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:05:37,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states
[2022-02-15 02:05:37,628 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:05:37,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants.
[2022-02-15 02:05:37,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380
[2022-02-15 02:05:37,629 INFO L87 Difference]: Start difference. First operand 208 states and 254 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:05:37,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:05:37,907 INFO L93 Difference]: Finished difference Result 395 states and 484 transitions.
[2022-02-15 02:05:37,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states.
[2022-02-15 02:05:37,907 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 40
[2022-02-15 02:05:37,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:05:37,908 INFO L225 Difference]: With dead ends: 395
[2022-02-15 02:05:37,908 INFO L226 Difference]: Without dead ends: 242
[2022-02-15 02:05:37,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506
[2022-02-15 02:05:37,909 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 57 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-02-15 02:05:37,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 41 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2022-02-15 02:05:37,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states.
[2022-02-15 02:05:37,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 208.
[2022-02-15 02:05:37,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 193 states have (on average 1.2279792746113989) internal successors, (237), 196 states have internal predecessors, (237), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:05:37,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 254 transitions.
[2022-02-15 02:05:37,958 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 254 transitions. Word has length 40
[2022-02-15 02:05:37,958 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:05:37,959 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 254 transitions.
[2022-02-15 02:05:37,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:05:37,959 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 254 transitions.
[2022-02-15 02:05:37,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41
[2022-02-15 02:05:37,959 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:05:37,959 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 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 02:05:37,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23
[2022-02-15 02:05:37,959 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:05:37,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:05:37,960 INFO L85 PathProgramCache]: Analyzing trace with hash -276453700, now seen corresponding path program 15 times
[2022-02-15 02:05:37,960 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:05:37,960 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [951135707]
[2022-02-15 02:05:37,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:05:38,017 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:38,017 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE
[2022-02-15 02:05:38,079 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:38,132 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:38,132 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:05:38,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:05:38,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:38,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:05:38,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:38,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:05:38,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:38,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:05:38,513 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:05:38,514 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [951135707]
[2022-02-15 02:05:38,514 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [951135707] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:05:38,514 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:05:38,514 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19
[2022-02-15 02:05:38,514 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626353880]
[2022-02-15 02:05:38,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:05:38,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states
[2022-02-15 02:05:38,514 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:05:38,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants.
[2022-02-15 02:05:38,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462
[2022-02-15 02:05:38,515 INFO L87 Difference]: Start difference. First operand 208 states and 254 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 18 states have internal predecessors, (34), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:05:38,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:05:38,867 INFO L93 Difference]: Finished difference Result 409 states and 504 transitions.
[2022-02-15 02:05:38,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states.
[2022-02-15 02:05:38,868 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 18 states have internal predecessors, (34), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 40
[2022-02-15 02:05:38,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:05:38,868 INFO L225 Difference]: With dead ends: 409
[2022-02-15 02:05:38,869 INFO L226 Difference]: Without dead ends: 245
[2022-02-15 02:05:38,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552
[2022-02-15 02:05:38,869 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 62 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2022-02-15 02:05:38,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 39 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2022-02-15 02:05:38,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states.
[2022-02-15 02:05:38,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 220.
[2022-02-15 02:05:38,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 205 states have (on average 1.2341463414634146) internal successors, (253), 208 states have internal predecessors, (253), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:05:38,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 270 transitions.
[2022-02-15 02:05:38,911 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 270 transitions. Word has length 40
[2022-02-15 02:05:38,911 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:05:38,911 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 270 transitions.
[2022-02-15 02:05:38,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 18 states have internal predecessors, (34), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:05:38,911 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 270 transitions.
[2022-02-15 02:05:38,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44
[2022-02-15 02:05:38,912 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:05:38,912 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 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 02:05:38,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24
[2022-02-15 02:05:38,912 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:05:38,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:05:38,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1742267585, now seen corresponding path program 16 times
[2022-02-15 02:05:38,912 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:05:38,912 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1066903418]
[2022-02-15 02:05:38,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:05:38,985 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:39,048 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:39,048 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:05:39,111 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:39,168 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:39,169 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:05:39,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:05:39,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:39,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:05:39,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:39,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:05:39,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:39,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:05:39,567 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:05:39,567 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1066903418]
[2022-02-15 02:05:39,567 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1066903418] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:05:39,567 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:05:39,567 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16
[2022-02-15 02:05:39,567 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055904893]
[2022-02-15 02:05:39,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:05:39,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states
[2022-02-15 02:05:39,568 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:05:39,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants.
[2022-02-15 02:05:39,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306
[2022-02-15 02:05:39,568 INFO L87 Difference]: Start difference. First operand 220 states and 270 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:05:39,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:05:39,980 INFO L93 Difference]: Finished difference Result 439 states and 535 transitions.
[2022-02-15 02:05:39,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states.
[2022-02-15 02:05:39,981 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 43
[2022-02-15 02:05:39,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:05:39,982 INFO L225 Difference]: With dead ends: 439
[2022-02-15 02:05:39,982 INFO L226 Difference]: Without dead ends: 277
[2022-02-15 02:05:39,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 11 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420
[2022-02-15 02:05:39,984 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 52 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2022-02-15 02:05:39,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 45 Invalid, 754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 741 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2022-02-15 02:05:39,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states.
[2022-02-15 02:05:40,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 229.
[2022-02-15 02:05:40,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 214 states have (on average 1.2242990654205608) internal successors, (262), 217 states have internal predecessors, (262), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:05:40,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 279 transitions.
[2022-02-15 02:05:40,049 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 279 transitions. Word has length 43
[2022-02-15 02:05:40,049 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:05:40,049 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 279 transitions.
[2022-02-15 02:05:40,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:05:40,050 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 279 transitions.
[2022-02-15 02:05:40,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44
[2022-02-15 02:05:40,051 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:05:40,051 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 2, 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 02:05:40,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25
[2022-02-15 02:05:40,051 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:05:40,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:05:40,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1680227971, now seen corresponding path program 17 times
[2022-02-15 02:05:40,052 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:05:40,052 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1190381985]
[2022-02-15 02:05:40,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:05:40,107 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:40,154 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:40,154 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:05:40,214 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:40,259 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:40,259 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:05:40,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:05:40,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:40,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:05:40,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:40,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:05:40,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:40,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:05:40,645 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:05:40,645 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1190381985]
[2022-02-15 02:05:40,645 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1190381985] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:05:40,645 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:05:40,645 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17
[2022-02-15 02:05:40,645 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779712374]
[2022-02-15 02:05:40,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:05:40,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states
[2022-02-15 02:05:40,645 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:05:40,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants.
[2022-02-15 02:05:40,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342
[2022-02-15 02:05:40,646 INFO L87 Difference]: Start difference. First operand 229 states and 279 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:05:41,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:05:41,045 INFO L93 Difference]: Finished difference Result 457 states and 553 transitions.
[2022-02-15 02:05:41,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states.
[2022-02-15 02:05:41,045 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 43
[2022-02-15 02:05:41,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:05:41,046 INFO L225 Difference]: With dead ends: 457
[2022-02-15 02:05:41,046 INFO L226 Difference]: Without dead ends: 286
[2022-02-15 02:05:41,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 10 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462
[2022-02-15 02:05:41,048 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 54 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2022-02-15 02:05:41,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 46 Invalid, 754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 740 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2022-02-15 02:05:41,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states.
[2022-02-15 02:05:41,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 229.
[2022-02-15 02:05:41,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 214 states have (on average 1.2242990654205608) internal successors, (262), 217 states have internal predecessors, (262), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:05:41,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 279 transitions.
[2022-02-15 02:05:41,109 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 279 transitions. Word has length 43
[2022-02-15 02:05:41,109 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:05:41,109 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 279 transitions.
[2022-02-15 02:05:41,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:05:41,109 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 279 transitions.
[2022-02-15 02:05:41,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44
[2022-02-15 02:05:41,110 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:05:41,110 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 3, 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 02:05:41,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26
[2022-02-15 02:05:41,110 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:05:41,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:05:41,110 INFO L85 PathProgramCache]: Analyzing trace with hash 809300991, now seen corresponding path program 18 times
[2022-02-15 02:05:41,110 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:05:41,110 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1918176223]
[2022-02-15 02:05:41,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:05:41,155 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:41,212 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:41,212 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:05:41,255 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:41,308 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:41,309 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:05:41,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:05:41,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:41,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:05:41,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:41,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:05:41,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:41,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:05:41,699 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:05:41,699 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1918176223]
[2022-02-15 02:05:41,700 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1918176223] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:05:41,700 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:05:41,700 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18
[2022-02-15 02:05:41,700 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461452021]
[2022-02-15 02:05:41,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:05:41,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states
[2022-02-15 02:05:41,700 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:05:41,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants.
[2022-02-15 02:05:41,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380
[2022-02-15 02:05:41,701 INFO L87 Difference]: Start difference. First operand 229 states and 279 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:05:42,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:05:42,129 INFO L93 Difference]: Finished difference Result 448 states and 544 transitions.
[2022-02-15 02:05:42,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states.
[2022-02-15 02:05:42,129 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 43
[2022-02-15 02:05:42,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:05:42,131 INFO L225 Difference]: With dead ends: 448
[2022-02-15 02:05:42,131 INFO L226 Difference]: Without dead ends: 277
[2022-02-15 02:05:42,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 9 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506
[2022-02-15 02:05:42,132 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 59 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2022-02-15 02:05:42,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 43 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 772 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2022-02-15 02:05:42,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states.
[2022-02-15 02:05:42,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 229.
[2022-02-15 02:05:42,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 214 states have (on average 1.2242990654205608) internal successors, (262), 217 states have internal predecessors, (262), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:05:42,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 279 transitions.
[2022-02-15 02:05:42,194 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 279 transitions. Word has length 43
[2022-02-15 02:05:42,194 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:05:42,194 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 279 transitions.
[2022-02-15 02:05:42,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:05:42,195 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 279 transitions.
[2022-02-15 02:05:42,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44
[2022-02-15 02:05:42,195 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:05:42,195 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 3, 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 02:05:42,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27
[2022-02-15 02:05:42,196 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:05:42,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:05:42,196 INFO L85 PathProgramCache]: Analyzing trace with hash -8347459, now seen corresponding path program 19 times
[2022-02-15 02:05:42,196 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:05:42,196 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1619579176]
[2022-02-15 02:05:42,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:05:42,257 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:42,313 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:42,313 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:05:42,357 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:42,410 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:42,411 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:05:42,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:05:42,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:42,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:05:42,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:42,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:05:42,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:42,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:05:42,762 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:05:42,763 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1619579176]
[2022-02-15 02:05:42,763 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1619579176] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:05:42,763 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:05:42,763 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19
[2022-02-15 02:05:42,763 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319544449]
[2022-02-15 02:05:42,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:05:42,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states
[2022-02-15 02:05:42,763 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:05:42,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants.
[2022-02-15 02:05:42,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420
[2022-02-15 02:05:42,764 INFO L87 Difference]: Start difference. First operand 229 states and 279 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:05:43,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:05:43,190 INFO L93 Difference]: Finished difference Result 439 states and 535 transitions.
[2022-02-15 02:05:43,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states.
[2022-02-15 02:05:43,190 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 43
[2022-02-15 02:05:43,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:05:43,191 INFO L225 Difference]: With dead ends: 439
[2022-02-15 02:05:43,191 INFO L226 Difference]: Without dead ends: 268
[2022-02-15 02:05:43,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 8 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552
[2022-02-15 02:05:43,192 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 55 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 950 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2022-02-15 02:05:43,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 56 Invalid, 966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 950 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2022-02-15 02:05:43,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states.
[2022-02-15 02:05:43,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 229.
[2022-02-15 02:05:43,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 214 states have (on average 1.2242990654205608) internal successors, (262), 217 states have internal predecessors, (262), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:05:43,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 279 transitions.
[2022-02-15 02:05:43,259 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 279 transitions. Word has length 43
[2022-02-15 02:05:43,259 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:05:43,259 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 279 transitions.
[2022-02-15 02:05:43,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:05:43,259 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 279 transitions.
[2022-02-15 02:05:43,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44
[2022-02-15 02:05:43,260 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:05:43,260 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 2, 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 02:05:43,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28
[2022-02-15 02:05:43,260 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:05:43,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:05:43,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1596695361, now seen corresponding path program 20 times
[2022-02-15 02:05:43,261 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:05:43,261 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [965553015]
[2022-02-15 02:05:43,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:05:43,303 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:43,355 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:43,355 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:05:43,401 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:43,456 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:43,457 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:05:43,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:05:43,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:43,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:05:43,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:43,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:05:43,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:43,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:05:43,834 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:05:43,834 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [965553015]
[2022-02-15 02:05:43,834 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [965553015] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:05:43,834 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:05:43,834 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20
[2022-02-15 02:05:43,834 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532722133]
[2022-02-15 02:05:43,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:05:43,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states
[2022-02-15 02:05:43,835 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:05:43,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants.
[2022-02-15 02:05:43,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462
[2022-02-15 02:05:43,835 INFO L87 Difference]: Start difference. First operand 229 states and 279 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:05:44,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:05:44,199 INFO L93 Difference]: Finished difference Result 434 states and 530 transitions.
[2022-02-15 02:05:44,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states.
[2022-02-15 02:05:44,207 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 43
[2022-02-15 02:05:44,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:05:44,209 INFO L225 Difference]: With dead ends: 434
[2022-02-15 02:05:44,209 INFO L226 Difference]: Without dead ends: 263
[2022-02-15 02:05:44,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600
[2022-02-15 02:05:44,210 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 64 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2022-02-15 02:05:44,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 40 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2022-02-15 02:05:44,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states.
[2022-02-15 02:05:44,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 229.
[2022-02-15 02:05:44,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 214 states have (on average 1.2242990654205608) internal successors, (262), 217 states have internal predecessors, (262), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:05:44,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 279 transitions.
[2022-02-15 02:05:44,276 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 279 transitions. Word has length 43
[2022-02-15 02:05:44,276 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:05:44,276 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 279 transitions.
[2022-02-15 02:05:44,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:05:44,277 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 279 transitions.
[2022-02-15 02:05:44,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44
[2022-02-15 02:05:44,279 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:05:44,279 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 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 02:05:44,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29
[2022-02-15 02:05:44,279 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:05:44,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:05:44,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1687154685, now seen corresponding path program 21 times
[2022-02-15 02:05:44,280 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:05:44,280 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1128306460]
[2022-02-15 02:05:44,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:05:44,338 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:44,338 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE
[2022-02-15 02:05:44,382 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:44,440 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:44,440 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:05:44,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:05:44,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:44,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:05:44,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:44,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:05:44,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:44,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:05:44,818 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:05:44,818 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1128306460]
[2022-02-15 02:05:44,818 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1128306460] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:05:44,818 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:05:44,818 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21
[2022-02-15 02:05:44,819 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575464907]
[2022-02-15 02:05:44,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:05:44,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states
[2022-02-15 02:05:44,819 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:05:44,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants.
[2022-02-15 02:05:44,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506
[2022-02-15 02:05:44,819 INFO L87 Difference]: Start difference. First operand 229 states and 279 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:05:45,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:05:45,195 INFO L93 Difference]: Finished difference Result 448 states and 554 transitions.
[2022-02-15 02:05:45,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states.
[2022-02-15 02:05:45,195 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 43
[2022-02-15 02:05:45,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:05:45,196 INFO L225 Difference]: With dead ends: 448
[2022-02-15 02:05:45,196 INFO L226 Difference]: Without dead ends: 266
[2022-02-15 02:05:45,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650
[2022-02-15 02:05:45,197 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 63 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2022-02-15 02:05:45,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 44 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2022-02-15 02:05:45,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states.
[2022-02-15 02:05:45,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 241.
[2022-02-15 02:05:45,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 226 states have (on average 1.2300884955752212) internal successors, (278), 229 states have internal predecessors, (278), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:05:45,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 295 transitions.
[2022-02-15 02:05:45,262 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 295 transitions. Word has length 43
[2022-02-15 02:05:45,262 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:05:45,262 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 295 transitions.
[2022-02-15 02:05:45,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:05:45,262 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 295 transitions.
[2022-02-15 02:05:45,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46
[2022-02-15 02:05:45,263 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:05:45,263 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 02:05:45,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30
[2022-02-15 02:05:45,263 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:05:45,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:05:45,264 INFO L85 PathProgramCache]: Analyzing trace with hash -2117823645, now seen corresponding path program 2 times
[2022-02-15 02:05:45,264 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:05:45,264 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1526077157]
[2022-02-15 02:05:45,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:05:45,284 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:45,372 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:45,373 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:05:45,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:05:45,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:45,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:05:45,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:45,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:05:45,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:45,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:05:45,495 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:05:45,495 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1526077157]
[2022-02-15 02:05:45,495 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1526077157] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:05:45,496 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:05:45,496 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11
[2022-02-15 02:05:45,496 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878240068]
[2022-02-15 02:05:45,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:05:45,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states
[2022-02-15 02:05:45,496 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:05:45,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2022-02-15 02:05:45,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110
[2022-02-15 02:05:45,497 INFO L87 Difference]: Start difference. First operand 241 states and 295 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3)
[2022-02-15 02:05:45,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:05:45,658 INFO L93 Difference]: Finished difference Result 450 states and 550 transitions.
[2022-02-15 02:05:45,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states.
[2022-02-15 02:05:45,658 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 45
[2022-02-15 02:05:45,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:05:45,659 INFO L225 Difference]: With dead ends: 450
[2022-02-15 02:05:45,659 INFO L226 Difference]: Without dead ends: 261
[2022-02-15 02:05:45,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182
[2022-02-15 02:05:45,660 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 50 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-02-15 02:05:45,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 33 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-02-15 02:05:45,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states.
[2022-02-15 02:05:45,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 253.
[2022-02-15 02:05:45,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 238 states have (on average 1.218487394957983) internal successors, (290), 241 states have internal predecessors, (290), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:05:45,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 307 transitions.
[2022-02-15 02:05:45,724 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 307 transitions. Word has length 45
[2022-02-15 02:05:45,724 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:05:45,724 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 307 transitions.
[2022-02-15 02:05:45,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3)
[2022-02-15 02:05:45,724 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 307 transitions.
[2022-02-15 02:05:45,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47
[2022-02-15 02:05:45,725 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:05:45,725 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 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 02:05:45,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31
[2022-02-15 02:05:45,725 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:05:45,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:05:45,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1569322332, now seen corresponding path program 22 times
[2022-02-15 02:05:45,725 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:05:45,725 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1342103138]
[2022-02-15 02:05:45,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:05:45,783 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:45,840 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:45,840 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:05:45,889 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:45,925 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:45,925 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:05:45,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:05:45,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:45,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:05:45,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:45,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:05:45,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:45,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:05:46,368 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:05:46,368 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1342103138]
[2022-02-15 02:05:46,369 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1342103138] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:05:46,369 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:05:46,369 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17
[2022-02-15 02:05:46,369 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377663445]
[2022-02-15 02:05:46,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:05:46,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states
[2022-02-15 02:05:46,369 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:05:46,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants.
[2022-02-15 02:05:46,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342
[2022-02-15 02:05:46,370 INFO L87 Difference]: Start difference. First operand 253 states and 307 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:05:46,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:05:46,835 INFO L93 Difference]: Finished difference Result 508 states and 611 transitions.
[2022-02-15 02:05:46,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states.
[2022-02-15 02:05:46,835 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 46
[2022-02-15 02:05:46,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:05:46,837 INFO L225 Difference]: With dead ends: 508
[2022-02-15 02:05:46,837 INFO L226 Difference]: Without dead ends: 319
[2022-02-15 02:05:46,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 13 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462
[2022-02-15 02:05:46,838 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 49 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 842 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2022-02-15 02:05:46,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 54 Invalid, 855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 842 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2022-02-15 02:05:46,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states.
[2022-02-15 02:05:46,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 262.
[2022-02-15 02:05:46,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 247 states have (on average 1.2105263157894737) internal successors, (299), 250 states have internal predecessors, (299), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:05:46,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 316 transitions.
[2022-02-15 02:05:46,919 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 316 transitions. Word has length 46
[2022-02-15 02:05:46,920 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:05:46,920 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 316 transitions.
[2022-02-15 02:05:46,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:05:46,920 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 316 transitions.
[2022-02-15 02:05:46,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47
[2022-02-15 02:05:46,920 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:05:46,920 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 2, 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 02:05:46,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32
[2022-02-15 02:05:46,921 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:05:46,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:05:46,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1339441570, now seen corresponding path program 23 times
[2022-02-15 02:05:46,921 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:05:46,921 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [773502369]
[2022-02-15 02:05:46,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:05:46,962 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:47,002 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:47,002 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:05:47,068 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:47,102 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:47,102 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:05:47,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:05:47,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:47,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:05:47,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:47,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:05:47,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:47,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:05:47,529 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:05:47,530 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [773502369]
[2022-02-15 02:05:47,530 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [773502369] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:05:47,530 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:05:47,530 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18
[2022-02-15 02:05:47,530 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165202821]
[2022-02-15 02:05:47,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:05:47,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states
[2022-02-15 02:05:47,530 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:05:47,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants.
[2022-02-15 02:05:47,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380
[2022-02-15 02:05:47,531 INFO L87 Difference]: Start difference. First operand 262 states and 316 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:05:48,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:05:48,031 INFO L93 Difference]: Finished difference Result 526 states and 629 transitions.
[2022-02-15 02:05:48,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states.
[2022-02-15 02:05:48,031 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 46
[2022-02-15 02:05:48,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:05:48,033 INFO L225 Difference]: With dead ends: 526
[2022-02-15 02:05:48,033 INFO L226 Difference]: Without dead ends: 328
[2022-02-15 02:05:48,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 12 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506
[2022-02-15 02:05:48,034 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 52 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 859 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2022-02-15 02:05:48,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 53 Invalid, 873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 859 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2022-02-15 02:05:48,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states.
[2022-02-15 02:05:48,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 262.
[2022-02-15 02:05:48,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 247 states have (on average 1.2105263157894737) internal successors, (299), 250 states have internal predecessors, (299), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:05:48,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 316 transitions.
[2022-02-15 02:05:48,123 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 316 transitions. Word has length 46
[2022-02-15 02:05:48,123 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:05:48,123 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 316 transitions.
[2022-02-15 02:05:48,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:05:48,123 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 316 transitions.
[2022-02-15 02:05:48,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47
[2022-02-15 02:05:48,124 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:05:48,124 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 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 02:05:48,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33
[2022-02-15 02:05:48,124 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:05:48,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:05:48,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1277401956, now seen corresponding path program 24 times
[2022-02-15 02:05:48,125 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:05:48,125 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [30679733]
[2022-02-15 02:05:48,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:05:48,182 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:48,226 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:48,227 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:05:48,264 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:48,306 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:48,307 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:05:48,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:05:48,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:48,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:05:48,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:48,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:05:48,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:48,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:05:48,696 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:05:48,697 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [30679733]
[2022-02-15 02:05:48,697 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [30679733] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:05:48,697 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:05:48,697 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19
[2022-02-15 02:05:48,697 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622839984]
[2022-02-15 02:05:48,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:05:48,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states
[2022-02-15 02:05:48,697 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:05:48,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants.
[2022-02-15 02:05:48,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420
[2022-02-15 02:05:48,698 INFO L87 Difference]: Start difference. First operand 262 states and 316 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:05:49,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:05:49,100 INFO L93 Difference]: Finished difference Result 517 states and 620 transitions.
[2022-02-15 02:05:49,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states.
[2022-02-15 02:05:49,101 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 46
[2022-02-15 02:05:49,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:05:49,102 INFO L225 Difference]: With dead ends: 517
[2022-02-15 02:05:49,102 INFO L226 Difference]: Without dead ends: 319
[2022-02-15 02:05:49,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 11 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552
[2022-02-15 02:05:49,103 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 55 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 721 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2022-02-15 02:05:49,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 48 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 721 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2022-02-15 02:05:49,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states.
[2022-02-15 02:05:49,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 262.
[2022-02-15 02:05:49,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 247 states have (on average 1.2105263157894737) internal successors, (299), 250 states have internal predecessors, (299), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:05:49,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 316 transitions.
[2022-02-15 02:05:49,166 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 316 transitions. Word has length 46
[2022-02-15 02:05:49,166 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:05:49,166 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 316 transitions.
[2022-02-15 02:05:49,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:05:49,166 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 316 transitions.
[2022-02-15 02:05:49,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47
[2022-02-15 02:05:49,167 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:05:49,167 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 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 02:05:49,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34
[2022-02-15 02:05:49,167 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:05:49,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:05:49,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1212127006, now seen corresponding path program 25 times
[2022-02-15 02:05:49,167 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:05:49,167 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1888096063]
[2022-02-15 02:05:49,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:05:49,218 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:49,253 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:49,253 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:05:49,303 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:49,336 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:49,336 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:05:49,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:05:49,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:49,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:05:49,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:49,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:05:49,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:49,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:05:49,738 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:05:49,739 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1888096063]
[2022-02-15 02:05:49,739 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1888096063] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:05:49,739 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:05:49,739 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20
[2022-02-15 02:05:49,739 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707741676]
[2022-02-15 02:05:49,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:05:49,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states
[2022-02-15 02:05:49,739 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:05:49,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants.
[2022-02-15 02:05:49,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462
[2022-02-15 02:05:49,740 INFO L87 Difference]: Start difference. First operand 262 states and 316 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:05:50,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:05:50,182 INFO L93 Difference]: Finished difference Result 508 states and 611 transitions.
[2022-02-15 02:05:50,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states.
[2022-02-15 02:05:50,182 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 46
[2022-02-15 02:05:50,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:05:50,183 INFO L225 Difference]: With dead ends: 508
[2022-02-15 02:05:50,183 INFO L226 Difference]: Without dead ends: 310
[2022-02-15 02:05:50,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 10 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600
[2022-02-15 02:05:50,184 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 54 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2022-02-15 02:05:50,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 55 Invalid, 950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 934 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2022-02-15 02:05:50,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states.
[2022-02-15 02:05:50,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 262.
[2022-02-15 02:05:50,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 247 states have (on average 1.2105263157894737) internal successors, (299), 250 states have internal predecessors, (299), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:05:50,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 316 transitions.
[2022-02-15 02:05:50,247 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 316 transitions. Word has length 46
[2022-02-15 02:05:50,248 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:05:50,248 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 316 transitions.
[2022-02-15 02:05:50,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:05:50,248 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 316 transitions.
[2022-02-15 02:05:50,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47
[2022-02-15 02:05:50,262 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:05:50,262 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 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 02:05:50,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35
[2022-02-15 02:05:50,262 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:05:50,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:05:50,263 INFO L85 PathProgramCache]: Analyzing trace with hash 394478556, now seen corresponding path program 26 times
[2022-02-15 02:05:50,263 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:05:50,263 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1463703081]
[2022-02-15 02:05:50,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:05:50,317 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:50,356 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:50,356 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:05:50,401 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:50,434 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:50,434 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:05:50,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:05:50,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:50,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:05:50,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:50,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:05:50,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:50,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:05:50,852 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:05:50,852 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1463703081]
[2022-02-15 02:05:50,852 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1463703081] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:05:50,852 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:05:50,852 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21
[2022-02-15 02:05:50,852 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74315712]
[2022-02-15 02:05:50,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:05:50,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states
[2022-02-15 02:05:50,853 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:05:50,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants.
[2022-02-15 02:05:50,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506
[2022-02-15 02:05:50,854 INFO L87 Difference]: Start difference. First operand 262 states and 316 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:05:51,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:05:51,378 INFO L93 Difference]: Finished difference Result 499 states and 602 transitions.
[2022-02-15 02:05:51,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states.
[2022-02-15 02:05:51,378 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 46
[2022-02-15 02:05:51,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:05:51,379 INFO L225 Difference]: With dead ends: 499
[2022-02-15 02:05:51,379 INFO L226 Difference]: Without dead ends: 301
[2022-02-15 02:05:51,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 9 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650
[2022-02-15 02:05:51,380 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 57 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 1013 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 1030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2022-02-15 02:05:51,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 57 Invalid, 1030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1013 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2022-02-15 02:05:51,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states.
[2022-02-15 02:05:51,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 262.
[2022-02-15 02:05:51,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 247 states have (on average 1.2105263157894737) internal successors, (299), 250 states have internal predecessors, (299), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:05:51,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 316 transitions.
[2022-02-15 02:05:51,476 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 316 transitions. Word has length 46
[2022-02-15 02:05:51,476 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:05:51,477 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 316 transitions.
[2022-02-15 02:05:51,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:05:51,477 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 316 transitions.
[2022-02-15 02:05:51,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47
[2022-02-15 02:05:51,477 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:05:51,477 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 2, 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 02:05:51,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36
[2022-02-15 02:05:51,478 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:05:51,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:05:51,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1193869346, now seen corresponding path program 27 times
[2022-02-15 02:05:51,478 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:05:51,478 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1027690916]
[2022-02-15 02:05:51,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:05:51,537 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:51,595 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:51,596 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:05:51,653 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:51,706 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:51,707 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:05:51,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:05:51,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:51,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:05:51,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:51,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:05:51,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:51,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:05:52,137 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:05:52,138 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1027690916]
[2022-02-15 02:05:52,138 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1027690916] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:05:52,138 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:05:52,138 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22
[2022-02-15 02:05:52,138 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059409245]
[2022-02-15 02:05:52,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:05:52,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states
[2022-02-15 02:05:52,138 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:05:52,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants.
[2022-02-15 02:05:52,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552
[2022-02-15 02:05:52,139 INFO L87 Difference]: Start difference. First operand 262 states and 316 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 21 states have internal predecessors, (40), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:05:52,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:05:52,534 INFO L93 Difference]: Finished difference Result 494 states and 597 transitions.
[2022-02-15 02:05:52,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states.
[2022-02-15 02:05:52,534 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 21 states have internal predecessors, (40), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 46
[2022-02-15 02:05:52,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:05:52,535 INFO L225 Difference]: With dead ends: 494
[2022-02-15 02:05:52,535 INFO L226 Difference]: Without dead ends: 296
[2022-02-15 02:05:52,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 8 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702
[2022-02-15 02:05:52,536 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 66 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2022-02-15 02:05:52,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 41 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2022-02-15 02:05:52,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states.
[2022-02-15 02:05:52,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 262.
[2022-02-15 02:05:52,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 247 states have (on average 1.2105263157894737) internal successors, (299), 250 states have internal predecessors, (299), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:05:52,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 316 transitions.
[2022-02-15 02:05:52,604 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 316 transitions. Word has length 46
[2022-02-15 02:05:52,604 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:05:52,604 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 316 transitions.
[2022-02-15 02:05:52,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 21 states have internal predecessors, (40), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:05:52,604 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 316 transitions.
[2022-02-15 02:05:52,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47
[2022-02-15 02:05:52,604 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:05:52,604 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 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 02:05:52,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37
[2022-02-15 02:05:52,605 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:05:52,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:05:52,605 INFO L85 PathProgramCache]: Analyzing trace with hash 2089980700, now seen corresponding path program 28 times
[2022-02-15 02:05:52,605 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:05:52,605 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1151717460]
[2022-02-15 02:05:52,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:05:52,640 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:52,640 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE
[2022-02-15 02:05:52,674 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:52,717 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:52,718 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:05:52,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:05:52,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:52,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:05:52,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:52,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:05:52,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:52,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:05:53,131 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:05:53,132 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1151717460]
[2022-02-15 02:05:53,132 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1151717460] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:05:53,132 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:05:53,132 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23
[2022-02-15 02:05:53,132 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836782716]
[2022-02-15 02:05:53,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:05:53,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states
[2022-02-15 02:05:53,132 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:05:53,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants.
[2022-02-15 02:05:53,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600
[2022-02-15 02:05:53,133 INFO L87 Difference]: Start difference. First operand 262 states and 316 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:05:53,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:05:53,564 INFO L93 Difference]: Finished difference Result 508 states and 621 transitions.
[2022-02-15 02:05:53,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states.
[2022-02-15 02:05:53,564 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 46
[2022-02-15 02:05:53,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:05:53,565 INFO L225 Difference]: With dead ends: 508
[2022-02-15 02:05:53,565 INFO L226 Difference]: Without dead ends: 299
[2022-02-15 02:05:53,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 7 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756
[2022-02-15 02:05:53,566 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 76 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2022-02-15 02:05:53,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 42 Invalid, 903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 883 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2022-02-15 02:05:53,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states.
[2022-02-15 02:05:53,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 274.
[2022-02-15 02:05:53,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 259 states have (on average 1.2162162162162162) internal successors, (315), 262 states have internal predecessors, (315), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:05:53,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 332 transitions.
[2022-02-15 02:05:53,638 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 332 transitions. Word has length 46
[2022-02-15 02:05:53,639 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:05:53,639 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 332 transitions.
[2022-02-15 02:05:53,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:05:53,639 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 332 transitions.
[2022-02-15 02:05:53,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50
[2022-02-15 02:05:53,639 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:05:53,639 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 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 02:05:53,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38
[2022-02-15 02:05:53,640 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:05:53,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:05:53,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1745750559, now seen corresponding path program 29 times
[2022-02-15 02:05:53,640 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:05:53,640 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1451791005]
[2022-02-15 02:05:53,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:05:53,691 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:53,746 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:53,746 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:05:53,799 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:53,842 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:53,843 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:05:53,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:05:53,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:53,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:05:53,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:53,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:05:53,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:53,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:05:54,264 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:05:54,265 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1451791005]
[2022-02-15 02:05:54,265 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1451791005] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:05:54,265 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:05:54,265 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18
[2022-02-15 02:05:54,265 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960126605]
[2022-02-15 02:05:54,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:05:54,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states
[2022-02-15 02:05:54,265 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:05:54,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants.
[2022-02-15 02:05:54,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380
[2022-02-15 02:05:54,266 INFO L87 Difference]: Start difference. First operand 274 states and 332 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:05:54,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:05:54,799 INFO L93 Difference]: Finished difference Result 556 states and 666 transitions.
[2022-02-15 02:05:54,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states.
[2022-02-15 02:05:54,801 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 49
[2022-02-15 02:05:54,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:05:54,802 INFO L225 Difference]: With dead ends: 556
[2022-02-15 02:05:54,802 INFO L226 Difference]: Without dead ends: 349
[2022-02-15 02:05:54,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 12 SyntacticMatches, 15 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506
[2022-02-15 02:05:54,803 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 49 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 936 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2022-02-15 02:05:54,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 50 Invalid, 949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 936 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2022-02-15 02:05:54,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states.
[2022-02-15 02:05:54,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 283.
[2022-02-15 02:05:54,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 268 states have (on average 1.208955223880597) internal successors, (324), 271 states have internal predecessors, (324), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:05:54,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 341 transitions.
[2022-02-15 02:05:54,926 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 341 transitions. Word has length 49
[2022-02-15 02:05:54,926 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:05:54,926 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 341 transitions.
[2022-02-15 02:05:54,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:05:54,926 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 341 transitions.
[2022-02-15 02:05:54,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50
[2022-02-15 02:05:54,927 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:05:54,927 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 7, 2, 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 02:05:54,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39
[2022-02-15 02:05:54,927 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:05:54,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:05:54,927 INFO L85 PathProgramCache]: Analyzing trace with hash 2020510173, now seen corresponding path program 30 times
[2022-02-15 02:05:54,928 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:05:54,928 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2041211632]
[2022-02-15 02:05:54,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:05:54,985 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:55,032 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:55,032 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:05:55,067 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:55,111 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:55,111 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:05:55,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:05:55,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:55,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:05:55,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:55,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:05:55,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:55,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:05:55,779 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:05:55,779 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2041211632]
[2022-02-15 02:05:55,779 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2041211632] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:05:55,779 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:05:55,779 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23
[2022-02-15 02:05:55,779 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145258798]
[2022-02-15 02:05:55,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:05:55,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states
[2022-02-15 02:05:55,780 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:05:55,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants.
[2022-02-15 02:05:55,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650
[2022-02-15 02:05:55,780 INFO L87 Difference]: Start difference. First operand 283 states and 341 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 21 states have internal predecessors, (43), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:05:56,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:05:56,335 INFO L93 Difference]: Finished difference Result 548 states and 654 transitions.
[2022-02-15 02:05:56,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states.
[2022-02-15 02:05:56,336 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 21 states have internal predecessors, (43), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 49
[2022-02-15 02:05:56,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:05:56,336 INFO L225 Difference]: With dead ends: 548
[2022-02-15 02:05:56,336 INFO L226 Difference]: Without dead ends: 332
[2022-02-15 02:05:56,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 6 SyntacticMatches, 14 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870
[2022-02-15 02:05:56,338 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 51 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 1042 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 1060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2022-02-15 02:05:56,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 74 Invalid, 1060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1042 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2022-02-15 02:05:56,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states.
[2022-02-15 02:05:56,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 283.
[2022-02-15 02:05:56,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 268 states have (on average 1.208955223880597) internal successors, (324), 271 states have internal predecessors, (324), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:05:56,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 341 transitions.
[2022-02-15 02:05:56,456 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 341 transitions. Word has length 49
[2022-02-15 02:05:56,456 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:05:56,456 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 341 transitions.
[2022-02-15 02:05:56,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 21 states have internal predecessors, (43), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:05:56,456 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 341 transitions.
[2022-02-15 02:05:56,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50
[2022-02-15 02:05:56,457 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:05:56,457 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 6, 3, 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 02:05:56,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40
[2022-02-15 02:05:56,457 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:05:56,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:05:56,457 INFO L85 PathProgramCache]: Analyzing trace with hash -888253729, now seen corresponding path program 31 times
[2022-02-15 02:05:56,457 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:05:56,457 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [312580233]
[2022-02-15 02:05:56,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:05:56,508 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:56,556 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:56,557 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:05:56,608 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:56,657 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:56,658 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:05:56,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:05:56,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:56,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:05:56,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:56,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:05:56,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:56,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:05:57,108 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:05:57,108 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [312580233]
[2022-02-15 02:05:57,108 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [312580233] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:05:57,108 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:05:57,108 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20
[2022-02-15 02:05:57,108 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013423577]
[2022-02-15 02:05:57,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:05:57,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states
[2022-02-15 02:05:57,109 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:05:57,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants.
[2022-02-15 02:05:57,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506
[2022-02-15 02:05:57,109 INFO L87 Difference]: Start difference. First operand 283 states and 341 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:05:57,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:05:57,520 INFO L93 Difference]: Finished difference Result 560 states and 666 transitions.
[2022-02-15 02:05:57,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states.
[2022-02-15 02:05:57,520 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 49
[2022-02-15 02:05:57,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:05:57,521 INFO L225 Difference]: With dead ends: 560
[2022-02-15 02:05:57,521 INFO L226 Difference]: Without dead ends: 344
[2022-02-15 02:05:57,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 12 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600
[2022-02-15 02:05:57,522 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 54 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2022-02-15 02:05:57,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 41 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 730 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2022-02-15 02:05:57,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states.
[2022-02-15 02:05:57,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 283.
[2022-02-15 02:05:57,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 268 states have (on average 1.208955223880597) internal successors, (324), 271 states have internal predecessors, (324), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:05:57,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 341 transitions.
[2022-02-15 02:05:57,614 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 341 transitions. Word has length 49
[2022-02-15 02:05:57,614 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:05:57,614 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 341 transitions.
[2022-02-15 02:05:57,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:05:57,614 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 341 transitions.
[2022-02-15 02:05:57,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50
[2022-02-15 02:05:57,614 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:05:57,614 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 5, 4, 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 02:05:57,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41
[2022-02-15 02:05:57,615 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:05:57,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:05:57,615 INFO L85 PathProgramCache]: Analyzing trace with hash -826214115, now seen corresponding path program 32 times
[2022-02-15 02:05:57,615 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:05:57,615 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1555603788]
[2022-02-15 02:05:57,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:05:57,664 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:57,698 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:57,698 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:05:57,740 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:57,786 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:57,786 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:05:57,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:05:57,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:57,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:05:57,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:57,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:05:57,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:57,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:05:58,241 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:05:58,242 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1555603788]
[2022-02-15 02:05:58,242 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1555603788] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:05:58,242 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:05:58,242 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21
[2022-02-15 02:05:58,242 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489103865]
[2022-02-15 02:05:58,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:05:58,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states
[2022-02-15 02:05:58,242 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:05:58,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants.
[2022-02-15 02:05:58,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506
[2022-02-15 02:05:58,243 INFO L87 Difference]: Start difference. First operand 283 states and 341 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:05:58,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:05:58,767 INFO L93 Difference]: Finished difference Result 556 states and 666 transitions.
[2022-02-15 02:05:58,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states.
[2022-02-15 02:05:58,767 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 49
[2022-02-15 02:05:58,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:05:58,769 INFO L225 Difference]: With dead ends: 556
[2022-02-15 02:05:58,769 INFO L226 Difference]: Without dead ends: 340
[2022-02-15 02:05:58,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 12 SyntacticMatches, 12 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650
[2022-02-15 02:05:58,775 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 62 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 955 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2022-02-15 02:05:58,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 43 Invalid, 971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 955 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2022-02-15 02:05:58,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states.
[2022-02-15 02:05:58,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 283.
[2022-02-15 02:05:58,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 268 states have (on average 1.208955223880597) internal successors, (324), 271 states have internal predecessors, (324), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:05:58,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 341 transitions.
[2022-02-15 02:05:58,906 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 341 transitions. Word has length 49
[2022-02-15 02:05:58,907 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:05:58,907 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 341 transitions.
[2022-02-15 02:05:58,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:05:58,907 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 341 transitions.
[2022-02-15 02:05:58,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50
[2022-02-15 02:05:58,907 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:05:58,908 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 5, 4, 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 02:05:58,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42
[2022-02-15 02:05:58,908 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:05:58,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:05:58,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1663314847, now seen corresponding path program 33 times
[2022-02-15 02:05:58,908 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:05:58,908 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2066107502]
[2022-02-15 02:05:58,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:05:58,959 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:59,004 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:59,005 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:05:59,069 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:59,103 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:59,104 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:05:59,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:05:59,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:59,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:05:59,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:59,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:05:59,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:59,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:05:59,529 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:05:59,529 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2066107502]
[2022-02-15 02:05:59,529 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2066107502] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:05:59,529 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:05:59,529 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22
[2022-02-15 02:05:59,529 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262059409]
[2022-02-15 02:05:59,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:05:59,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states
[2022-02-15 02:05:59,529 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:05:59,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants.
[2022-02-15 02:05:59,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552
[2022-02-15 02:05:59,530 INFO L87 Difference]: Start difference. First operand 283 states and 341 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 states have internal predecessors, (43), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:06:00,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:06:00,053 INFO L93 Difference]: Finished difference Result 547 states and 657 transitions.
[2022-02-15 02:06:00,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states.
[2022-02-15 02:06:00,054 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 states have internal predecessors, (43), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 49
[2022-02-15 02:06:00,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:06:00,056 INFO L225 Difference]: With dead ends: 547
[2022-02-15 02:06:00,056 INFO L226 Difference]: Without dead ends: 331
[2022-02-15 02:06:00,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 12 SyntacticMatches, 11 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702
[2022-02-15 02:06:00,057 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 56 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 993 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2022-02-15 02:06:00,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 55 Invalid, 1010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 993 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2022-02-15 02:06:00,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states.
[2022-02-15 02:06:00,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 283.
[2022-02-15 02:06:00,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 268 states have (on average 1.208955223880597) internal successors, (324), 271 states have internal predecessors, (324), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:06:00,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 341 transitions.
[2022-02-15 02:06:00,183 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 341 transitions. Word has length 49
[2022-02-15 02:06:00,183 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:06:00,183 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 341 transitions.
[2022-02-15 02:06:00,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 states have internal predecessors, (43), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:06:00,183 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 341 transitions.
[2022-02-15 02:06:00,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50
[2022-02-15 02:06:00,184 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:06:00,184 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 6, 3, 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 02:06:00,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43
[2022-02-15 02:06:00,184 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:06:00,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:06:00,184 INFO L85 PathProgramCache]: Analyzing trace with hash 845666397, now seen corresponding path program 34 times
[2022-02-15 02:06:00,185 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:06:00,185 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [981864495]
[2022-02-15 02:06:00,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:06:00,229 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:00,282 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:00,282 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:06:00,317 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:00,365 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:00,365 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:06:00,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:06:00,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:00,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:06:00,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:00,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:06:00,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:00,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:06:00,866 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:06:00,866 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [981864495]
[2022-02-15 02:06:00,866 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [981864495] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:06:00,866 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:06:00,866 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23
[2022-02-15 02:06:00,867 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785767102]
[2022-02-15 02:06:00,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:06:00,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states
[2022-02-15 02:06:00,867 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:06:00,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants.
[2022-02-15 02:06:00,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600
[2022-02-15 02:06:00,867 INFO L87 Difference]: Start difference. First operand 283 states and 341 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 22 states have internal predecessors, (43), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:06:01,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:06:01,354 INFO L93 Difference]: Finished difference Result 538 states and 648 transitions.
[2022-02-15 02:06:01,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states.
[2022-02-15 02:06:01,354 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 22 states have internal predecessors, (43), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 49
[2022-02-15 02:06:01,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:06:01,356 INFO L225 Difference]: With dead ends: 538
[2022-02-15 02:06:01,356 INFO L226 Difference]: Without dead ends: 322
[2022-02-15 02:06:01,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 12 SyntacticMatches, 10 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756
[2022-02-15 02:06:01,357 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 67 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 895 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2022-02-15 02:06:01,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 47 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 895 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2022-02-15 02:06:01,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states.
[2022-02-15 02:06:01,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 283.
[2022-02-15 02:06:01,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 268 states have (on average 1.208955223880597) internal successors, (324), 271 states have internal predecessors, (324), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:06:01,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 341 transitions.
[2022-02-15 02:06:01,452 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 341 transitions. Word has length 49
[2022-02-15 02:06:01,452 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:06:01,452 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 341 transitions.
[2022-02-15 02:06:01,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 22 states have internal predecessors, (43), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:06:01,453 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 341 transitions.
[2022-02-15 02:06:01,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50
[2022-02-15 02:06:01,453 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:06:01,453 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 7, 2, 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 02:06:01,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44
[2022-02-15 02:06:01,453 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:06:01,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:06:01,453 INFO L85 PathProgramCache]: Analyzing trace with hash -742681505, now seen corresponding path program 35 times
[2022-02-15 02:06:01,454 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:06:01,454 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [812294129]
[2022-02-15 02:06:01,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:06:01,491 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:01,535 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:01,535 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:06:01,583 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:01,627 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:01,628 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:06:01,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:06:01,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:01,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:06:01,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:01,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:06:01,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:01,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:06:02,107 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:06:02,108 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [812294129]
[2022-02-15 02:06:02,108 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [812294129] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:06:02,108 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:06:02,108 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24
[2022-02-15 02:06:02,108 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337575245]
[2022-02-15 02:06:02,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:06:02,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states
[2022-02-15 02:06:02,108 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:06:02,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants.
[2022-02-15 02:06:02,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650
[2022-02-15 02:06:02,109 INFO L87 Difference]: Start difference. First operand 283 states and 341 transitions. Second operand has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 states have internal predecessors, (43), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:06:02,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:06:02,621 INFO L93 Difference]: Finished difference Result 533 states and 643 transitions.
[2022-02-15 02:06:02,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states.
[2022-02-15 02:06:02,622 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 states have internal predecessors, (43), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 49
[2022-02-15 02:06:02,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:06:02,623 INFO L225 Difference]: With dead ends: 533
[2022-02-15 02:06:02,623 INFO L226 Difference]: Without dead ends: 317
[2022-02-15 02:06:02,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 12 SyntacticMatches, 9 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812
[2022-02-15 02:06:02,624 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 64 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1012 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 1031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2022-02-15 02:06:02,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 51 Invalid, 1031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1012 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2022-02-15 02:06:02,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states.
[2022-02-15 02:06:02,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 283.
[2022-02-15 02:06:02,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 268 states have (on average 1.208955223880597) internal successors, (324), 271 states have internal predecessors, (324), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:06:02,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 341 transitions.
[2022-02-15 02:06:02,733 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 341 transitions. Word has length 49
[2022-02-15 02:06:02,733 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:06:02,733 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 341 transitions.
[2022-02-15 02:06:02,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 states have internal predecessors, (43), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:06:02,733 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 341 transitions.
[2022-02-15 02:06:02,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50
[2022-02-15 02:06:02,734 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:06:02,734 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 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 02:06:02,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45
[2022-02-15 02:06:02,734 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:06:02,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:06:02,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1753798755, now seen corresponding path program 36 times
[2022-02-15 02:06:02,734 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:06:02,734 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1002077163]
[2022-02-15 02:06:02,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:06:02,778 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:02,778 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE
[2022-02-15 02:06:02,814 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:02,875 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:02,875 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:06:02,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:06:02,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:02,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:06:02,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:02,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:06:02,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:02,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:06:03,339 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:06:03,339 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1002077163]
[2022-02-15 02:06:03,339 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1002077163] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:06:03,339 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:06:03,339 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25
[2022-02-15 02:06:03,339 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932038121]
[2022-02-15 02:06:03,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:06:03,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states
[2022-02-15 02:06:03,339 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:06:03,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants.
[2022-02-15 02:06:03,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702
[2022-02-15 02:06:03,340 INFO L87 Difference]: Start difference. First operand 283 states and 341 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:06:03,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:06:03,878 INFO L93 Difference]: Finished difference Result 547 states and 667 transitions.
[2022-02-15 02:06:03,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states.
[2022-02-15 02:06:03,879 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 49
[2022-02-15 02:06:03,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:06:03,880 INFO L225 Difference]: With dead ends: 547
[2022-02-15 02:06:03,880 INFO L226 Difference]: Without dead ends: 320
[2022-02-15 02:06:03,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 12 SyntacticMatches, 8 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=714, Unknown=0, NotChecked=0, Total=870
[2022-02-15 02:06:03,881 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 73 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 1095 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2022-02-15 02:06:03,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 44 Invalid, 1116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1095 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2022-02-15 02:06:03,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states.
[2022-02-15 02:06:03,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 295.
[2022-02-15 02:06:03,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 280 states have (on average 1.2142857142857142) internal successors, (340), 283 states have internal predecessors, (340), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:06:03,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 357 transitions.
[2022-02-15 02:06:03,976 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 357 transitions. Word has length 49
[2022-02-15 02:06:03,976 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:06:03,976 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 357 transitions.
[2022-02-15 02:06:03,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:06:03,976 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 357 transitions.
[2022-02-15 02:06:03,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52
[2022-02-15 02:06:03,976 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:06:03,976 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 02:06:03,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46
[2022-02-15 02:06:03,977 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:06:03,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:06:03,977 INFO L85 PathProgramCache]: Analyzing trace with hash -601579469, now seen corresponding path program 3 times
[2022-02-15 02:06:03,977 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:06:03,977 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1734087755]
[2022-02-15 02:06:03,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:06:04,029 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:04,068 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:04,069 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:06:04,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:06:04,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:04,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:06:04,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:04,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:06:04,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:04,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:06:04,206 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:06:04,207 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1734087755]
[2022-02-15 02:06:04,207 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1734087755] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:06:04,207 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:06:04,207 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13
[2022-02-15 02:06:04,207 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660119864]
[2022-02-15 02:06:04,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:06:04,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states
[2022-02-15 02:06:04,207 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:06:04,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2022-02-15 02:06:04,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156
[2022-02-15 02:06:04,208 INFO L87 Difference]: Start difference. First operand 295 states and 357 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3)
[2022-02-15 02:06:04,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:06:04,444 INFO L93 Difference]: Finished difference Result 561 states and 675 transitions.
[2022-02-15 02:06:04,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states.
[2022-02-15 02:06:04,444 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 51
[2022-02-15 02:06:04,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:06:04,445 INFO L225 Difference]: With dead ends: 561
[2022-02-15 02:06:04,445 INFO L226 Difference]: Without dead ends: 327
[2022-02-15 02:06:04,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272
[2022-02-15 02:06:04,446 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 62 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-02-15 02:06:04,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 32 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-02-15 02:06:04,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states.
[2022-02-15 02:06:04,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 307.
[2022-02-15 02:06:04,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 292 states have (on average 1.2054794520547945) internal successors, (352), 295 states have internal predecessors, (352), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:06:04,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 369 transitions.
[2022-02-15 02:06:04,586 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 369 transitions. Word has length 51
[2022-02-15 02:06:04,586 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:06:04,586 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 369 transitions.
[2022-02-15 02:06:04,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3)
[2022-02-15 02:06:04,586 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 369 transitions.
[2022-02-15 02:06:04,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53
[2022-02-15 02:06:04,587 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:06:04,587 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 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 02:06:04,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47
[2022-02-15 02:06:04,587 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:06:04,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:06:04,587 INFO L85 PathProgramCache]: Analyzing trace with hash 679090812, now seen corresponding path program 37 times
[2022-02-15 02:06:04,588 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:06:04,588 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [196243689]
[2022-02-15 02:06:04,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:06:04,656 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:04,704 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:04,704 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:06:04,738 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:04,783 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:04,783 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:06:04,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:06:04,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:04,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:06:04,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:04,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:06:04,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:04,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:06:05,250 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:06:05,251 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [196243689]
[2022-02-15 02:06:05,251 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [196243689] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:06:05,251 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:06:05,251 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19
[2022-02-15 02:06:05,251 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617576228]
[2022-02-15 02:06:05,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:06:05,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states
[2022-02-15 02:06:05,251 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:06:05,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants.
[2022-02-15 02:06:05,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420
[2022-02-15 02:06:05,252 INFO L87 Difference]: Start difference. First operand 307 states and 369 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:06:05,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:06:05,824 INFO L93 Difference]: Finished difference Result 619 states and 736 transitions.
[2022-02-15 02:06:05,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states.
[2022-02-15 02:06:05,824 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 52
[2022-02-15 02:06:05,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:06:05,825 INFO L225 Difference]: With dead ends: 619
[2022-02-15 02:06:05,825 INFO L226 Difference]: Without dead ends: 385
[2022-02-15 02:06:05,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 12 SyntacticMatches, 17 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552
[2022-02-15 02:06:05,826 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 48 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 1007 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 1020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2022-02-15 02:06:05,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 54 Invalid, 1020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1007 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2022-02-15 02:06:05,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states.
[2022-02-15 02:06:05,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 316.
[2022-02-15 02:06:05,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 301 states have (on average 1.1993355481727574) internal successors, (361), 304 states have internal predecessors, (361), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:06:05,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 378 transitions.
[2022-02-15 02:06:05,988 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 378 transitions. Word has length 52
[2022-02-15 02:06:05,988 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:06:05,988 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 378 transitions.
[2022-02-15 02:06:05,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:06:05,989 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 378 transitions.
[2022-02-15 02:06:05,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53
[2022-02-15 02:06:05,989 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:06:05,989 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 2, 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 02:06:05,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48
[2022-02-15 02:06:05,989 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:06:05,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:06:05,990 INFO L85 PathProgramCache]: Analyzing trace with hash -164914690, now seen corresponding path program 38 times
[2022-02-15 02:06:05,990 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:06:05,990 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [439776655]
[2022-02-15 02:06:05,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:06:06,050 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:06,105 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:06,105 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:06:06,164 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:06,205 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:06,205 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:06:06,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:06:06,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:06,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:06:06,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:06,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:06:06,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:06,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:06:06,683 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:06:06,683 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [439776655]
[2022-02-15 02:06:06,683 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [439776655] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:06:06,683 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:06:06,683 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20
[2022-02-15 02:06:06,683 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812306771]
[2022-02-15 02:06:06,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:06:06,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states
[2022-02-15 02:06:06,684 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:06:06,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants.
[2022-02-15 02:06:06,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462
[2022-02-15 02:06:06,684 INFO L87 Difference]: Start difference. First operand 316 states and 378 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:06:07,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:06:07,288 INFO L93 Difference]: Finished difference Result 663 states and 783 transitions.
[2022-02-15 02:06:07,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states.
[2022-02-15 02:06:07,291 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 52
[2022-02-15 02:06:07,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:06:07,293 INFO L225 Difference]: With dead ends: 663
[2022-02-15 02:06:07,293 INFO L226 Difference]: Without dead ends: 420
[2022-02-15 02:06:07,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 12 SyntacticMatches, 16 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600
[2022-02-15 02:06:07,294 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 51 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 974 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2022-02-15 02:06:07,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 51 Invalid, 989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 974 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2022-02-15 02:06:07,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states.
[2022-02-15 02:06:07,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 316.
[2022-02-15 02:06:07,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 301 states have (on average 1.1993355481727574) internal successors, (361), 304 states have internal predecessors, (361), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:06:07,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 378 transitions.
[2022-02-15 02:06:07,418 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 378 transitions. Word has length 52
[2022-02-15 02:06:07,419 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:06:07,419 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 378 transitions.
[2022-02-15 02:06:07,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:06:07,419 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 378 transitions.
[2022-02-15 02:06:07,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53
[2022-02-15 02:06:07,419 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:06:07,419 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 7, 3, 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 02:06:07,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49
[2022-02-15 02:06:07,420 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:06:07,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:06:07,420 INFO L85 PathProgramCache]: Analyzing trace with hash 109844924, now seen corresponding path program 39 times
[2022-02-15 02:06:07,420 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:06:07,420 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [682166517]
[2022-02-15 02:06:07,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:06:07,459 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:07,493 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:07,493 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:06:07,541 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:07,586 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:07,586 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:06:07,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:06:07,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:07,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:06:07,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:07,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:06:07,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:07,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:06:08,147 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:06:08,147 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [682166517]
[2022-02-15 02:06:08,147 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [682166517] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:06:08,147 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:06:08,147 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21
[2022-02-15 02:06:08,147 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120940900]
[2022-02-15 02:06:08,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:06:08,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states
[2022-02-15 02:06:08,147 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:06:08,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants.
[2022-02-15 02:06:08,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506
[2022-02-15 02:06:08,148 INFO L87 Difference]: Start difference. First operand 316 states and 378 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:06:08,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:06:08,877 INFO L93 Difference]: Finished difference Result 634 states and 751 transitions.
[2022-02-15 02:06:08,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states.
[2022-02-15 02:06:08,879 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 52
[2022-02-15 02:06:08,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:06:08,881 INFO L225 Difference]: With dead ends: 634
[2022-02-15 02:06:08,881 INFO L226 Difference]: Without dead ends: 391
[2022-02-15 02:06:08,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 12 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650
[2022-02-15 02:06:08,881 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 51 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 1149 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 1164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2022-02-15 02:06:08,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 59 Invalid, 1164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1149 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2022-02-15 02:06:08,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states.
[2022-02-15 02:06:09,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 316.
[2022-02-15 02:06:09,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 301 states have (on average 1.1993355481727574) internal successors, (361), 304 states have internal predecessors, (361), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:06:09,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 378 transitions.
[2022-02-15 02:06:09,014 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 378 transitions. Word has length 52
[2022-02-15 02:06:09,014 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:06:09,015 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 378 transitions.
[2022-02-15 02:06:09,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:06:09,015 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 378 transitions.
[2022-02-15 02:06:09,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53
[2022-02-15 02:06:09,015 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:06:09,015 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 4, 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 02:06:09,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50
[2022-02-15 02:06:09,016 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:06:09,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:06:09,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1496048318, now seen corresponding path program 40 times
[2022-02-15 02:06:09,016 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:06:09,016 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2138541389]
[2022-02-15 02:06:09,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:06:09,066 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:09,115 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:09,115 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:06:09,163 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:09,206 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:09,206 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:06:09,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:06:09,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:09,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:06:09,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:09,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:06:09,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:09,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:06:09,693 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:06:09,693 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2138541389]
[2022-02-15 02:06:09,693 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2138541389] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:06:09,693 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:06:09,693 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22
[2022-02-15 02:06:09,694 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24062248]
[2022-02-15 02:06:09,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:06:09,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states
[2022-02-15 02:06:09,694 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:06:09,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants.
[2022-02-15 02:06:09,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600
[2022-02-15 02:06:09,694 INFO L87 Difference]: Start difference. First operand 316 states and 378 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:06:10,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:06:10,242 INFO L93 Difference]: Finished difference Result 622 states and 735 transitions.
[2022-02-15 02:06:10,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states.
[2022-02-15 02:06:10,242 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 52
[2022-02-15 02:06:10,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:06:10,243 INFO L225 Difference]: With dead ends: 622
[2022-02-15 02:06:10,243 INFO L226 Difference]: Without dead ends: 379
[2022-02-15 02:06:10,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 12 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702
[2022-02-15 02:06:10,244 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 51 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 917 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2022-02-15 02:06:10,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 50 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 917 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2022-02-15 02:06:10,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states.
[2022-02-15 02:06:10,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 316.
[2022-02-15 02:06:10,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 301 states have (on average 1.1993355481727574) internal successors, (361), 304 states have internal predecessors, (361), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:06:10,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 378 transitions.
[2022-02-15 02:06:10,386 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 378 transitions. Word has length 52
[2022-02-15 02:06:10,386 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:06:10,386 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 378 transitions.
[2022-02-15 02:06:10,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:06:10,386 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 378 transitions.
[2022-02-15 02:06:10,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53
[2022-02-15 02:06:10,387 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:06:10,387 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 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 02:06:10,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51
[2022-02-15 02:06:10,387 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:06:10,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:06:10,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1558087932, now seen corresponding path program 41 times
[2022-02-15 02:06:10,388 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:06:10,388 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [510942300]
[2022-02-15 02:06:10,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:06:10,435 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:10,469 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:10,469 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:06:10,516 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:10,549 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:10,549 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:06:10,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:06:10,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:10,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:06:10,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:10,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:06:10,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:10,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:06:11,101 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:06:11,102 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [510942300]
[2022-02-15 02:06:11,102 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [510942300] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:06:11,102 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:06:11,102 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23
[2022-02-15 02:06:11,102 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246732993]
[2022-02-15 02:06:11,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:06:11,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states
[2022-02-15 02:06:11,102 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:06:11,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants.
[2022-02-15 02:06:11,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600
[2022-02-15 02:06:11,103 INFO L87 Difference]: Start difference. First operand 316 states and 378 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:06:11,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:06:11,732 INFO L93 Difference]: Finished difference Result 616 states and 733 transitions.
[2022-02-15 02:06:11,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states.
[2022-02-15 02:06:11,732 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 52
[2022-02-15 02:06:11,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:06:11,733 INFO L225 Difference]: With dead ends: 616
[2022-02-15 02:06:11,733 INFO L226 Difference]: Without dead ends: 373
[2022-02-15 02:06:11,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 12 SyntacticMatches, 13 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756
[2022-02-15 02:06:11,734 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 57 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 1181 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 1198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2022-02-15 02:06:11,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 57 Invalid, 1198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1181 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2022-02-15 02:06:11,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states.
[2022-02-15 02:06:11,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 316.
[2022-02-15 02:06:11,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 301 states have (on average 1.1993355481727574) internal successors, (361), 304 states have internal predecessors, (361), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:06:11,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 378 transitions.
[2022-02-15 02:06:11,880 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 378 transitions. Word has length 52
[2022-02-15 02:06:11,880 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:06:11,880 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 378 transitions.
[2022-02-15 02:06:11,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:06:11,880 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 378 transitions.
[2022-02-15 02:06:11,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53
[2022-02-15 02:06:11,881 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:06:11,881 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 4, 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 02:06:11,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52
[2022-02-15 02:06:11,881 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:06:11,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:06:11,881 INFO L85 PathProgramCache]: Analyzing trace with hash -247350402, now seen corresponding path program 42 times
[2022-02-15 02:06:11,881 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:06:11,881 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1575325793]
[2022-02-15 02:06:11,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:06:11,930 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:11,973 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:11,973 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:06:12,008 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:12,059 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:12,059 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:06:12,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:06:12,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:12,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:06:12,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:12,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:06:12,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:12,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:06:12,543 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:06:12,543 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1575325793]
[2022-02-15 02:06:12,543 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1575325793] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:06:12,543 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:06:12,543 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24
[2022-02-15 02:06:12,543 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224932764]
[2022-02-15 02:06:12,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:06:12,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states
[2022-02-15 02:06:12,543 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:06:12,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants.
[2022-02-15 02:06:12,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650
[2022-02-15 02:06:12,544 INFO L87 Difference]: Start difference. First operand 316 states and 378 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 states have internal predecessors, (46), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:06:13,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:06:13,177 INFO L93 Difference]: Finished difference Result 607 states and 724 transitions.
[2022-02-15 02:06:13,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states.
[2022-02-15 02:06:13,177 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 states have internal predecessors, (46), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 52
[2022-02-15 02:06:13,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:06:13,178 INFO L225 Difference]: With dead ends: 607
[2022-02-15 02:06:13,178 INFO L226 Difference]: Without dead ends: 364
[2022-02-15 02:06:13,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 12 SyntacticMatches, 12 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812
[2022-02-15 02:06:13,179 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 60 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 1153 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 1171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2022-02-15 02:06:13,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 54 Invalid, 1171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1153 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2022-02-15 02:06:13,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states.
[2022-02-15 02:06:13,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 316.
[2022-02-15 02:06:13,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 301 states have (on average 1.1993355481727574) internal successors, (361), 304 states have internal predecessors, (361), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:06:13,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 378 transitions.
[2022-02-15 02:06:13,330 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 378 transitions. Word has length 52
[2022-02-15 02:06:13,331 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:06:13,331 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 378 transitions.
[2022-02-15 02:06:13,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 states have internal predecessors, (46), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:06:13,331 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 378 transitions.
[2022-02-15 02:06:13,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53
[2022-02-15 02:06:13,331 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:06:13,332 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 7, 3, 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 02:06:13,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53
[2022-02-15 02:06:13,332 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:06:13,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:06:13,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1064998852, now seen corresponding path program 43 times
[2022-02-15 02:06:13,332 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:06:13,332 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [556242645]
[2022-02-15 02:06:13,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:06:13,369 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:13,412 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:13,412 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:06:13,447 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:13,492 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:13,492 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:06:13,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:06:13,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:13,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:06:13,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:13,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:06:13,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:13,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:06:14,009 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:06:14,009 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [556242645]
[2022-02-15 02:06:14,009 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [556242645] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:06:14,009 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:06:14,009 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25
[2022-02-15 02:06:14,009 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790663681]
[2022-02-15 02:06:14,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:06:14,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states
[2022-02-15 02:06:14,009 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:06:14,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants.
[2022-02-15 02:06:14,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756
[2022-02-15 02:06:14,010 INFO L87 Difference]: Start difference. First operand 316 states and 378 transitions. Second operand has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 states have internal predecessors, (46), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:06:14,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:06:14,547 INFO L93 Difference]: Finished difference Result 604 states and 717 transitions.
[2022-02-15 02:06:14,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states.
[2022-02-15 02:06:14,548 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 states have internal predecessors, (46), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 52
[2022-02-15 02:06:14,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:06:14,549 INFO L225 Difference]: With dead ends: 604
[2022-02-15 02:06:14,549 INFO L226 Difference]: Without dead ends: 361
[2022-02-15 02:06:14,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 12 SyntacticMatches, 11 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870
[2022-02-15 02:06:14,549 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 65 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 960 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2022-02-15 02:06:14,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 46 Invalid, 981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 960 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2022-02-15 02:06:14,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states.
[2022-02-15 02:06:14,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 316.
[2022-02-15 02:06:14,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 301 states have (on average 1.1993355481727574) internal successors, (361), 304 states have internal predecessors, (361), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:06:14,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 378 transitions.
[2022-02-15 02:06:14,689 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 378 transitions. Word has length 52
[2022-02-15 02:06:14,689 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:06:14,689 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 378 transitions.
[2022-02-15 02:06:14,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 states have internal predecessors, (46), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:06:14,689 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 378 transitions.
[2022-02-15 02:06:14,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53
[2022-02-15 02:06:14,690 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:06:14,690 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 2, 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 02:06:14,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54
[2022-02-15 02:06:14,690 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:06:14,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:06:14,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1641620542, now seen corresponding path program 44 times
[2022-02-15 02:06:14,690 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:06:14,690 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1590227501]
[2022-02-15 02:06:14,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:06:14,737 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:14,770 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:14,770 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:06:14,804 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:14,847 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:14,847 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:06:14,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:06:14,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:14,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:06:14,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:14,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:06:14,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:14,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:06:15,341 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:06:15,342 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1590227501]
[2022-02-15 02:06:15,342 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1590227501] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:06:15,342 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:06:15,342 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26
[2022-02-15 02:06:15,342 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619262316]
[2022-02-15 02:06:15,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:06:15,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states
[2022-02-15 02:06:15,343 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:06:15,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants.
[2022-02-15 02:06:15,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756
[2022-02-15 02:06:15,343 INFO L87 Difference]: Start difference. First operand 316 states and 378 transitions. Second operand has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 states have internal predecessors, (46), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:06:15,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:06:15,900 INFO L93 Difference]: Finished difference Result 593 states and 710 transitions.
[2022-02-15 02:06:15,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states.
[2022-02-15 02:06:15,901 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 states have internal predecessors, (46), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 52
[2022-02-15 02:06:15,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:06:15,902 INFO L225 Difference]: With dead ends: 593
[2022-02-15 02:06:15,902 INFO L226 Difference]: Without dead ends: 350
[2022-02-15 02:06:15,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 12 SyntacticMatches, 10 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=159, Invalid=771, Unknown=0, NotChecked=0, Total=930
[2022-02-15 02:06:15,903 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 79 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 1044 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2022-02-15 02:06:15,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 40 Invalid, 1064 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1044 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2022-02-15 02:06:15,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states.
[2022-02-15 02:06:16,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 316.
[2022-02-15 02:06:16,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 301 states have (on average 1.1993355481727574) internal successors, (361), 304 states have internal predecessors, (361), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:06:16,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 378 transitions.
[2022-02-15 02:06:16,041 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 378 transitions. Word has length 52
[2022-02-15 02:06:16,041 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:06:16,041 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 378 transitions.
[2022-02-15 02:06:16,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 states have internal predecessors, (46), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:06:16,041 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 378 transitions.
[2022-02-15 02:06:16,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53
[2022-02-15 02:06:16,042 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:06:16,042 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 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 02:06:16,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55
[2022-02-15 02:06:16,042 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:06:16,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:06:16,042 INFO L85 PathProgramCache]: Analyzing trace with hash 630503292, now seen corresponding path program 45 times
[2022-02-15 02:06:16,042 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:06:16,042 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1236388139]
[2022-02-15 02:06:16,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:06:16,076 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:16,076 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE
[2022-02-15 02:06:16,111 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:16,170 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:16,171 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:06:16,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:06:16,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:16,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:06:16,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:16,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:06:16,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:16,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:06:16,795 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:06:16,795 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1236388139]
[2022-02-15 02:06:16,795 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1236388139] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:06:16,795 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:06:16,795 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27
[2022-02-15 02:06:16,795 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35095156]
[2022-02-15 02:06:16,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:06:16,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states
[2022-02-15 02:06:16,796 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:06:16,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants.
[2022-02-15 02:06:16,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812
[2022-02-15 02:06:16,796 INFO L87 Difference]: Start difference. First operand 316 states and 378 transitions. Second operand has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 26 states have internal predecessors, (46), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:06:17,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:06:17,430 INFO L93 Difference]: Finished difference Result 607 states and 734 transitions.
[2022-02-15 02:06:17,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states.
[2022-02-15 02:06:17,431 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 26 states have internal predecessors, (46), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 52
[2022-02-15 02:06:17,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:06:17,432 INFO L225 Difference]: With dead ends: 607
[2022-02-15 02:06:17,432 INFO L226 Difference]: Without dead ends: 353
[2022-02-15 02:06:17,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 12 SyntacticMatches, 9 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=169, Invalid=823, Unknown=0, NotChecked=0, Total=992
[2022-02-15 02:06:17,433 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 74 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1238 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 1260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2022-02-15 02:06:17,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 51 Invalid, 1260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1238 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2022-02-15 02:06:17,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states.
[2022-02-15 02:06:17,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 328.
[2022-02-15 02:06:17,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 313 states have (on average 1.2044728434504792) internal successors, (377), 316 states have internal predecessors, (377), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:06:17,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 394 transitions.
[2022-02-15 02:06:17,570 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 394 transitions. Word has length 52
[2022-02-15 02:06:17,570 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:06:17,570 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 394 transitions.
[2022-02-15 02:06:17,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 26 states have internal predecessors, (46), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:06:17,570 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 394 transitions.
[2022-02-15 02:06:17,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56
[2022-02-15 02:06:17,570 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:06:17,570 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 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 02:06:17,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56
[2022-02-15 02:06:17,571 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:06:17,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:06:17,571 INFO L85 PathProgramCache]: Analyzing trace with hash -2013376257, now seen corresponding path program 46 times
[2022-02-15 02:06:17,571 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:06:17,571 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1036477296]
[2022-02-15 02:06:17,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:06:17,622 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:17,654 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:17,654 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:06:17,689 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:17,731 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:17,731 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:06:17,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:06:17,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:17,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:06:17,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:17,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:06:17,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:17,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:06:18,219 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:06:18,220 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1036477296]
[2022-02-15 02:06:18,220 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1036477296] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:06:18,220 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:06:18,220 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20
[2022-02-15 02:06:18,220 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626620683]
[2022-02-15 02:06:18,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:06:18,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states
[2022-02-15 02:06:18,220 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:06:18,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants.
[2022-02-15 02:06:18,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462
[2022-02-15 02:06:18,221 INFO L87 Difference]: Start difference. First operand 328 states and 394 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:06:18,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:06:18,911 INFO L93 Difference]: Finished difference Result 673 states and 797 transitions.
[2022-02-15 02:06:18,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states.
[2022-02-15 02:06:18,911 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 55
[2022-02-15 02:06:18,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:06:18,912 INFO L225 Difference]: With dead ends: 673
[2022-02-15 02:06:18,913 INFO L226 Difference]: Without dead ends: 421
[2022-02-15 02:06:18,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 12 SyntacticMatches, 19 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600
[2022-02-15 02:06:18,913 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 49 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 1098 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1098 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2022-02-15 02:06:18,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 55 Invalid, 1111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1098 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2022-02-15 02:06:18,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states.
[2022-02-15 02:06:19,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 337.
[2022-02-15 02:06:19,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 322 states have (on average 1.1987577639751552) internal successors, (386), 325 states have internal predecessors, (386), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:06:19,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 403 transitions.
[2022-02-15 02:06:19,082 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 403 transitions. Word has length 55
[2022-02-15 02:06:19,082 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:06:19,082 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 403 transitions.
[2022-02-15 02:06:19,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:06:19,082 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 403 transitions.
[2022-02-15 02:06:19,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56
[2022-02-15 02:06:19,086 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:06:19,086 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 9, 2, 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 02:06:19,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57
[2022-02-15 02:06:19,086 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:06:19,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:06:19,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1252231741, now seen corresponding path program 47 times
[2022-02-15 02:06:19,086 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:06:19,086 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1554595672]
[2022-02-15 02:06:19,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:06:19,129 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:19,187 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:19,187 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:06:19,236 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:19,280 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:19,280 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:06:19,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:06:19,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:19,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:06:19,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:19,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:06:19,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:19,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:06:19,776 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:06:19,776 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1554595672]
[2022-02-15 02:06:19,776 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1554595672] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:06:19,776 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:06:19,776 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21
[2022-02-15 02:06:19,777 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293622016]
[2022-02-15 02:06:19,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:06:19,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states
[2022-02-15 02:06:19,777 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:06:19,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants.
[2022-02-15 02:06:19,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506
[2022-02-15 02:06:19,777 INFO L87 Difference]: Start difference. First operand 337 states and 403 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:06:20,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:06:20,477 INFO L93 Difference]: Finished difference Result 691 states and 815 transitions.
[2022-02-15 02:06:20,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states.
[2022-02-15 02:06:20,478 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 55
[2022-02-15 02:06:20,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:06:20,479 INFO L225 Difference]: With dead ends: 691
[2022-02-15 02:06:20,479 INFO L226 Difference]: Without dead ends: 430
[2022-02-15 02:06:20,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 12 SyntacticMatches, 18 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650
[2022-02-15 02:06:20,480 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 50 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1113 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2022-02-15 02:06:20,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 53 Invalid, 1127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1113 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2022-02-15 02:06:20,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states.
[2022-02-15 02:06:20,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 337.
[2022-02-15 02:06:20,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 322 states have (on average 1.1987577639751552) internal successors, (386), 325 states have internal predecessors, (386), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:06:20,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 403 transitions.
[2022-02-15 02:06:20,644 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 403 transitions. Word has length 55
[2022-02-15 02:06:20,645 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:06:20,645 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 403 transitions.
[2022-02-15 02:06:20,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:06:20,645 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 403 transitions.
[2022-02-15 02:06:20,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56
[2022-02-15 02:06:20,645 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:06:20,645 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 8, 3, 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 02:06:20,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58
[2022-02-15 02:06:20,645 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:06:20,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:06:20,646 INFO L85 PathProgramCache]: Analyzing trace with hash 408226239, now seen corresponding path program 48 times
[2022-02-15 02:06:20,646 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:06:20,646 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1970178526]
[2022-02-15 02:06:20,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:06:20,684 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:20,716 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:20,716 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:06:20,762 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:20,808 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:20,808 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:06:20,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:06:20,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:20,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:06:20,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:20,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:06:20,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:20,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:06:21,302 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:06:21,302 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1970178526]
[2022-02-15 02:06:21,302 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1970178526] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:06:21,302 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:06:21,302 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22
[2022-02-15 02:06:21,302 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330829253]
[2022-02-15 02:06:21,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:06:21,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states
[2022-02-15 02:06:21,303 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:06:21,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants.
[2022-02-15 02:06:21,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552
[2022-02-15 02:06:21,303 INFO L87 Difference]: Start difference. First operand 337 states and 403 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:06:22,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:06:22,005 INFO L93 Difference]: Finished difference Result 682 states and 806 transitions.
[2022-02-15 02:06:22,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states.
[2022-02-15 02:06:22,006 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 55
[2022-02-15 02:06:22,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:06:22,007 INFO L225 Difference]: With dead ends: 682
[2022-02-15 02:06:22,007 INFO L226 Difference]: Without dead ends: 421
[2022-02-15 02:06:22,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 12 SyntacticMatches, 17 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702
[2022-02-15 02:06:22,008 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 53 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1111 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2022-02-15 02:06:22,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 53 Invalid, 1126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1111 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2022-02-15 02:06:22,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states.
[2022-02-15 02:06:22,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 337.
[2022-02-15 02:06:22,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 322 states have (on average 1.1987577639751552) internal successors, (386), 325 states have internal predecessors, (386), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:06:22,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 403 transitions.
[2022-02-15 02:06:22,178 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 403 transitions. Word has length 55
[2022-02-15 02:06:22,178 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:06:22,178 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 403 transitions.
[2022-02-15 02:06:22,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:06:22,178 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 403 transitions.
[2022-02-15 02:06:22,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56
[2022-02-15 02:06:22,179 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:06:22,179 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 7, 4, 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 02:06:22,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59
[2022-02-15 02:06:22,179 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:06:22,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:06:22,179 INFO L85 PathProgramCache]: Analyzing trace with hash 682985853, now seen corresponding path program 49 times
[2022-02-15 02:06:22,179 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:06:22,179 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [562417511]
[2022-02-15 02:06:22,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:06:22,226 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:22,269 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:22,269 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:06:22,315 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:22,358 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:22,358 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:06:22,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:06:22,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:22,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:06:22,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:22,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:06:22,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:22,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:06:22,864 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:06:22,865 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [562417511]
[2022-02-15 02:06:22,865 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [562417511] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:06:22,865 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:06:22,865 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23
[2022-02-15 02:06:22,865 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857785724]
[2022-02-15 02:06:22,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:06:22,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states
[2022-02-15 02:06:22,865 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:06:22,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants.
[2022-02-15 02:06:22,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600
[2022-02-15 02:06:22,865 INFO L87 Difference]: Start difference. First operand 337 states and 403 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:06:23,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:06:23,613 INFO L93 Difference]: Finished difference Result 673 states and 797 transitions.
[2022-02-15 02:06:23,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states.
[2022-02-15 02:06:23,614 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 55
[2022-02-15 02:06:23,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:06:23,615 INFO L225 Difference]: With dead ends: 673
[2022-02-15 02:06:23,615 INFO L226 Difference]: Without dead ends: 412
[2022-02-15 02:06:23,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 12 SyntacticMatches, 16 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756
[2022-02-15 02:06:23,616 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 55 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 1290 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 1306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2022-02-15 02:06:23,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 59 Invalid, 1306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1290 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2022-02-15 02:06:23,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states.
[2022-02-15 02:06:23,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 337.
[2022-02-15 02:06:23,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 322 states have (on average 1.1987577639751552) internal successors, (386), 325 states have internal predecessors, (386), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:06:23,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 403 transitions.
[2022-02-15 02:06:23,792 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 403 transitions. Word has length 55
[2022-02-15 02:06:23,793 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:06:23,793 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 403 transitions.
[2022-02-15 02:06:23,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:06:23,793 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 403 transitions.
[2022-02-15 02:06:23,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56
[2022-02-15 02:06:23,793 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:06:23,793 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 6, 5, 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 02:06:23,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60
[2022-02-15 02:06:23,794 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:06:23,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:06:23,794 INFO L85 PathProgramCache]: Analyzing trace with hash 2069189247, now seen corresponding path program 50 times
[2022-02-15 02:06:23,794 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:06:23,794 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2125000441]
[2022-02-15 02:06:23,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:06:23,844 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:23,878 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:23,878 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:06:23,912 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:23,955 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:23,955 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:06:23,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:06:23,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:24,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:06:24,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:24,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:06:24,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:24,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:06:24,476 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:06:24,476 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2125000441]
[2022-02-15 02:06:24,477 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2125000441] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:06:24,477 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:06:24,477 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24
[2022-02-15 02:06:24,477 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532642645]
[2022-02-15 02:06:24,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:06:24,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states
[2022-02-15 02:06:24,477 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:06:24,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants.
[2022-02-15 02:06:24,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702
[2022-02-15 02:06:24,477 INFO L87 Difference]: Start difference. First operand 337 states and 403 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:06:25,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:06:25,219 INFO L93 Difference]: Finished difference Result 664 states and 784 transitions.
[2022-02-15 02:06:25,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states.
[2022-02-15 02:06:25,219 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 55
[2022-02-15 02:06:25,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:06:25,220 INFO L225 Difference]: With dead ends: 664
[2022-02-15 02:06:25,220 INFO L226 Difference]: Without dead ends: 403
[2022-02-15 02:06:25,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 12 SyntacticMatches, 15 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=131, Invalid=681, Unknown=0, NotChecked=0, Total=812
[2022-02-15 02:06:25,221 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 60 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 1312 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2022-02-15 02:06:25,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 46 Invalid, 1332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1312 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2022-02-15 02:06:25,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states.
[2022-02-15 02:06:25,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 337.
[2022-02-15 02:06:25,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 322 states have (on average 1.1987577639751552) internal successors, (386), 325 states have internal predecessors, (386), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:06:25,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 403 transitions.
[2022-02-15 02:06:25,393 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 403 transitions. Word has length 55
[2022-02-15 02:06:25,393 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:06:25,393 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 403 transitions.
[2022-02-15 02:06:25,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:06:25,394 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 403 transitions.
[2022-02-15 02:06:25,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56
[2022-02-15 02:06:25,394 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:06:25,394 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 6, 5, 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 02:06:25,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61
[2022-02-15 02:06:25,394 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:06:25,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:06:25,395 INFO L85 PathProgramCache]: Analyzing trace with hash 2131228861, now seen corresponding path program 51 times
[2022-02-15 02:06:25,395 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:06:25,395 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1150090608]
[2022-02-15 02:06:25,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:06:25,441 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:25,488 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:25,488 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:06:25,522 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:25,567 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:25,567 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:06:25,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:06:25,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:25,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:06:25,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:25,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:06:25,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:25,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:06:26,082 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:06:26,082 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1150090608]
[2022-02-15 02:06:26,082 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1150090608] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:06:26,082 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:06:26,082 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25
[2022-02-15 02:06:26,083 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964095129]
[2022-02-15 02:06:26,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:06:26,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states
[2022-02-15 02:06:26,083 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:06:26,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants.
[2022-02-15 02:06:26,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756
[2022-02-15 02:06:26,083 INFO L87 Difference]: Start difference. First operand 337 states and 403 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:06:26,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:06:26,753 INFO L93 Difference]: Finished difference Result 658 states and 778 transitions.
[2022-02-15 02:06:26,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states.
[2022-02-15 02:06:26,753 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 55
[2022-02-15 02:06:26,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:06:26,754 INFO L225 Difference]: With dead ends: 658
[2022-02-15 02:06:26,754 INFO L226 Difference]: Without dead ends: 397
[2022-02-15 02:06:26,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 12 SyntacticMatches, 14 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870
[2022-02-15 02:06:26,755 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 59 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 1107 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2022-02-15 02:06:26,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 46 Invalid, 1125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1107 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2022-02-15 02:06:26,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states.
[2022-02-15 02:06:26,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 337.
[2022-02-15 02:06:26,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 322 states have (on average 1.1987577639751552) internal successors, (386), 325 states have internal predecessors, (386), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:06:26,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 403 transitions.
[2022-02-15 02:06:26,934 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 403 transitions. Word has length 55
[2022-02-15 02:06:26,934 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:06:26,934 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 403 transitions.
[2022-02-15 02:06:26,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:06:26,934 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 403 transitions.
[2022-02-15 02:06:26,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56
[2022-02-15 02:06:26,934 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:06:26,935 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 7, 4, 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 02:06:26,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62
[2022-02-15 02:06:26,935 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:06:26,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:06:26,935 INFO L85 PathProgramCache]: Analyzing trace with hash 325790527, now seen corresponding path program 52 times
[2022-02-15 02:06:26,935 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:06:26,935 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [471552954]
[2022-02-15 02:06:26,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:06:26,993 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:27,039 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:27,039 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:06:27,085 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:27,118 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:27,118 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:06:27,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:06:27,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:27,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:06:27,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:27,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:06:27,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:27,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:06:27,651 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:06:27,651 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [471552954]
[2022-02-15 02:06:27,651 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [471552954] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:06:27,651 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:06:27,651 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26
[2022-02-15 02:06:27,651 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915176510]
[2022-02-15 02:06:27,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:06:27,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states
[2022-02-15 02:06:27,652 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:06:27,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants.
[2022-02-15 02:06:27,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756
[2022-02-15 02:06:27,652 INFO L87 Difference]: Start difference. First operand 337 states and 403 transitions. Second operand has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:06:28,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:06:28,282 INFO L93 Difference]: Finished difference Result 646 states and 770 transitions.
[2022-02-15 02:06:28,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states.
[2022-02-15 02:06:28,283 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 55
[2022-02-15 02:06:28,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:06:28,284 INFO L225 Difference]: With dead ends: 646
[2022-02-15 02:06:28,284 INFO L226 Difference]: Without dead ends: 385
[2022-02-15 02:06:28,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 12 SyntacticMatches, 13 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=152, Invalid=778, Unknown=0, NotChecked=0, Total=930
[2022-02-15 02:06:28,285 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 72 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 1004 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2022-02-15 02:06:28,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 40 Invalid, 1023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1004 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2022-02-15 02:06:28,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states.
[2022-02-15 02:06:28,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 337.
[2022-02-15 02:06:28,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 322 states have (on average 1.1987577639751552) internal successors, (386), 325 states have internal predecessors, (386), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:06:28,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 403 transitions.
[2022-02-15 02:06:28,474 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 403 transitions. Word has length 55
[2022-02-15 02:06:28,474 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:06:28,474 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 403 transitions.
[2022-02-15 02:06:28,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:06:28,474 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 403 transitions.
[2022-02-15 02:06:28,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56
[2022-02-15 02:06:28,475 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:06:28,475 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 8, 3, 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 02:06:28,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63
[2022-02-15 02:06:28,475 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:06:28,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:06:28,475 INFO L85 PathProgramCache]: Analyzing trace with hash -491857923, now seen corresponding path program 53 times
[2022-02-15 02:06:28,475 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:06:28,475 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1388374199]
[2022-02-15 02:06:28,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:06:28,528 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:28,571 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:28,571 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:06:28,605 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:28,648 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:28,649 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:06:28,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:06:28,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:28,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:06:28,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:28,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:06:28,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:28,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:06:29,193 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:06:29,193 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1388374199]
[2022-02-15 02:06:29,193 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1388374199] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:06:29,193 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:06:29,193 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27
[2022-02-15 02:06:29,193 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328440186]
[2022-02-15 02:06:29,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:06:29,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states
[2022-02-15 02:06:29,194 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:06:29,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants.
[2022-02-15 02:06:29,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812
[2022-02-15 02:06:29,194 INFO L87 Difference]: Start difference. First operand 337 states and 403 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:06:29,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:06:29,869 INFO L93 Difference]: Finished difference Result 637 states and 761 transitions.
[2022-02-15 02:06:29,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states.
[2022-02-15 02:06:29,870 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 55
[2022-02-15 02:06:29,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:06:29,871 INFO L225 Difference]: With dead ends: 637
[2022-02-15 02:06:29,871 INFO L226 Difference]: Without dead ends: 376
[2022-02-15 02:06:29,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 12 SyntacticMatches, 12 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=162, Invalid=830, Unknown=0, NotChecked=0, Total=992
[2022-02-15 02:06:29,872 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 69 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1217 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2022-02-15 02:06:29,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 53 Invalid, 1237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1217 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2022-02-15 02:06:29,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states.
[2022-02-15 02:06:30,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 337.
[2022-02-15 02:06:30,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 322 states have (on average 1.1987577639751552) internal successors, (386), 325 states have internal predecessors, (386), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:06:30,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 403 transitions.
[2022-02-15 02:06:30,058 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 403 transitions. Word has length 55
[2022-02-15 02:06:30,058 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:06:30,058 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 403 transitions.
[2022-02-15 02:06:30,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:06:30,058 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 403 transitions.
[2022-02-15 02:06:30,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56
[2022-02-15 02:06:30,059 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:06:30,059 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 9, 2, 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 02:06:30,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64
[2022-02-15 02:06:30,059 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:06:30,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:06:30,059 INFO L85 PathProgramCache]: Analyzing trace with hash -2080205825, now seen corresponding path program 54 times
[2022-02-15 02:06:30,059 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:06:30,060 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1680825467]
[2022-02-15 02:06:30,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:06:30,115 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:30,170 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:30,170 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:06:30,221 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:30,264 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:30,264 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:06:30,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:06:30,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:30,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:06:30,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:30,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:06:30,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:30,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:06:30,834 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:06:30,834 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1680825467]
[2022-02-15 02:06:30,834 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1680825467] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:06:30,834 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:06:30,834 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28
[2022-02-15 02:06:30,834 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181406579]
[2022-02-15 02:06:30,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:06:30,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states
[2022-02-15 02:06:30,834 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:06:30,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants.
[2022-02-15 02:06:30,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=787, Unknown=0, NotChecked=0, Total=930
[2022-02-15 02:06:30,835 INFO L87 Difference]: Start difference. First operand 337 states and 403 transitions. Second operand has 28 states, 28 states have (on average 1.75) internal successors, (49), 27 states have internal predecessors, (49), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:06:31,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:06:31,504 INFO L93 Difference]: Finished difference Result 644 states and 764 transitions.
[2022-02-15 02:06:31,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states.
[2022-02-15 02:06:31,504 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.75) internal successors, (49), 27 states have internal predecessors, (49), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 55
[2022-02-15 02:06:31,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:06:31,505 INFO L225 Difference]: With dead ends: 644
[2022-02-15 02:06:31,505 INFO L226 Difference]: Without dead ends: 383
[2022-02-15 02:06:31,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 13 SyntacticMatches, 11 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=147, Invalid=845, Unknown=0, NotChecked=0, Total=992
[2022-02-15 02:06:31,506 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 63 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 1241 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2022-02-15 02:06:31,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 55 Invalid, 1262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1241 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2022-02-15 02:06:31,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states.
[2022-02-15 02:06:31,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 337.
[2022-02-15 02:06:31,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 322 states have (on average 1.1987577639751552) internal successors, (386), 325 states have internal predecessors, (386), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:06:31,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 403 transitions.
[2022-02-15 02:06:31,686 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 403 transitions. Word has length 55
[2022-02-15 02:06:31,686 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:06:31,686 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 403 transitions.
[2022-02-15 02:06:31,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.75) internal successors, (49), 27 states have internal predecessors, (49), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:06:31,686 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 403 transitions.
[2022-02-15 02:06:31,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56
[2022-02-15 02:06:31,687 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:06:31,687 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 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 02:06:31,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65
[2022-02-15 02:06:31,687 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:06:31,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:06:31,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1203644221, now seen corresponding path program 55 times
[2022-02-15 02:06:31,688 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:06:31,688 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [862387821]
[2022-02-15 02:06:31,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:06:31,732 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:31,732 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE
[2022-02-15 02:06:31,766 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:31,809 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:31,809 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:06:31,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:06:31,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:31,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:06:31,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:31,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:06:31,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:31,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:06:32,389 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:06:32,390 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [862387821]
[2022-02-15 02:06:32,390 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [862387821] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:06:32,390 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:06:32,390 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29
[2022-02-15 02:06:32,390 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997067391]
[2022-02-15 02:06:32,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:06:32,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states
[2022-02-15 02:06:32,390 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:06:32,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants.
[2022-02-15 02:06:32,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=787, Unknown=0, NotChecked=0, Total=930
[2022-02-15 02:06:32,391 INFO L87 Difference]: Start difference. First operand 337 states and 403 transitions. Second operand has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 states have internal predecessors, (49), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:06:33,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:06:33,160 INFO L93 Difference]: Finished difference Result 646 states and 780 transitions.
[2022-02-15 02:06:33,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states.
[2022-02-15 02:06:33,161 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 states have internal predecessors, (49), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 55
[2022-02-15 02:06:33,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:06:33,162 INFO L225 Difference]: With dead ends: 646
[2022-02-15 02:06:33,162 INFO L226 Difference]: Without dead ends: 374
[2022-02-15 02:06:33,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 12 SyntacticMatches, 10 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=182, Invalid=940, Unknown=0, NotChecked=0, Total=1122
[2022-02-15 02:06:33,163 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 79 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 1592 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time
[2022-02-15 02:06:33,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 55 Invalid, 1615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1592 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time]
[2022-02-15 02:06:33,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states.
[2022-02-15 02:06:33,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 349.
[2022-02-15 02:06:33,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 334 states have (on average 1.2035928143712575) internal successors, (402), 337 states have internal predecessors, (402), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:06:33,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 419 transitions.
[2022-02-15 02:06:33,346 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 419 transitions. Word has length 55
[2022-02-15 02:06:33,346 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:06:33,346 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 419 transitions.
[2022-02-15 02:06:33,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 states have internal predecessors, (49), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:06:33,346 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 419 transitions.
[2022-02-15 02:06:33,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58
[2022-02-15 02:06:33,346 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:06:33,346 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 02:06:33,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66
[2022-02-15 02:06:33,346 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:06:33,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:06:33,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1847626205, now seen corresponding path program 4 times
[2022-02-15 02:06:33,347 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:06:33,347 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1328135642]
[2022-02-15 02:06:33,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:06:33,366 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:33,437 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:33,437 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:06:33,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:06:33,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:33,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:06:33,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:33,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:06:33,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:33,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:06:33,595 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:06:33,595 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1328135642]
[2022-02-15 02:06:33,595 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1328135642] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:06:33,595 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:06:33,595 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15
[2022-02-15 02:06:33,595 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916670041]
[2022-02-15 02:06:33,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:06:33,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states
[2022-02-15 02:06:33,596 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:06:33,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants.
[2022-02-15 02:06:33,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210
[2022-02-15 02:06:33,596 INFO L87 Difference]: Start difference. First operand 349 states and 419 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3)
[2022-02-15 02:06:33,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:06:33,917 INFO L93 Difference]: Finished difference Result 648 states and 776 transitions.
[2022-02-15 02:06:33,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states.
[2022-02-15 02:06:33,917 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 57
[2022-02-15 02:06:33,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:06:33,918 INFO L225 Difference]: With dead ends: 648
[2022-02-15 02:06:33,918 INFO L226 Difference]: Without dead ends: 369
[2022-02-15 02:06:33,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 8 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380
[2022-02-15 02:06:33,919 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 73 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-02-15 02:06:33,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 27 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-02-15 02:06:33,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states.
[2022-02-15 02:06:34,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 361.
[2022-02-15 02:06:34,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 346 states have (on average 1.1965317919075145) internal successors, (414), 349 states have internal predecessors, (414), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:06:34,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 431 transitions.
[2022-02-15 02:06:34,102 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 431 transitions. Word has length 57
[2022-02-15 02:06:34,103 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:06:34,103 INFO L470 AbstractCegarLoop]: Abstraction has 361 states and 431 transitions.
[2022-02-15 02:06:34,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3)
[2022-02-15 02:06:34,103 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 431 transitions.
[2022-02-15 02:06:34,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59
[2022-02-15 02:06:34,103 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:06:34,103 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 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 02:06:34,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67
[2022-02-15 02:06:34,103 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:06:34,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:06:34,104 INFO L85 PathProgramCache]: Analyzing trace with hash -490608740, now seen corresponding path program 56 times
[2022-02-15 02:06:34,104 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:06:34,104 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2021076417]
[2022-02-15 02:06:34,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:06:34,147 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:34,196 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:34,196 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:06:34,243 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:34,286 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:34,287 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:06:34,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:06:34,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:34,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:06:34,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:34,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:06:34,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:34,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:06:34,811 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:06:34,811 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2021076417]
[2022-02-15 02:06:34,811 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2021076417] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:06:34,812 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:06:34,812 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21
[2022-02-15 02:06:34,812 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673107690]
[2022-02-15 02:06:34,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:06:34,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states
[2022-02-15 02:06:34,812 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:06:34,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants.
[2022-02-15 02:06:34,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506
[2022-02-15 02:06:34,812 INFO L87 Difference]: Start difference. First operand 361 states and 431 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:06:35,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:06:35,611 INFO L93 Difference]: Finished difference Result 742 states and 873 transitions.
[2022-02-15 02:06:35,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states.
[2022-02-15 02:06:35,612 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 58
[2022-02-15 02:06:35,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:06:35,613 INFO L225 Difference]: With dead ends: 742
[2022-02-15 02:06:35,613 INFO L226 Difference]: Without dead ends: 463
[2022-02-15 02:06:35,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 12 SyntacticMatches, 21 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650
[2022-02-15 02:06:35,614 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 48 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 1220 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 1233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2022-02-15 02:06:35,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 54 Invalid, 1233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1220 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2022-02-15 02:06:35,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states.
[2022-02-15 02:06:35,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 370.
[2022-02-15 02:06:35,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 355 states have (on average 1.1915492957746479) internal successors, (423), 358 states have internal predecessors, (423), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:06:35,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 440 transitions.
[2022-02-15 02:06:35,865 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 440 transitions. Word has length 58
[2022-02-15 02:06:35,865 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:06:35,865 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 440 transitions.
[2022-02-15 02:06:35,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:06:35,865 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 440 transitions.
[2022-02-15 02:06:35,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59
[2022-02-15 02:06:35,866 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:06:35,866 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 10, 2, 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 02:06:35,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68
[2022-02-15 02:06:35,866 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:06:35,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:06:35,866 INFO L85 PathProgramCache]: Analyzing trace with hash -66962018, now seen corresponding path program 57 times
[2022-02-15 02:06:35,866 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:06:35,866 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [258458355]
[2022-02-15 02:06:35,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:06:35,916 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:35,961 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:35,961 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:06:35,995 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:36,037 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:36,037 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:06:36,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:06:36,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:36,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:06:36,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:36,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:06:36,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:36,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:06:36,607 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:06:36,607 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [258458355]
[2022-02-15 02:06:36,607 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [258458355] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:06:36,607 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:06:36,607 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22
[2022-02-15 02:06:36,607 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197068023]
[2022-02-15 02:06:36,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:06:36,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states
[2022-02-15 02:06:36,607 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:06:36,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants.
[2022-02-15 02:06:36,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600
[2022-02-15 02:06:36,608 INFO L87 Difference]: Start difference. First operand 370 states and 440 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:06:37,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:06:37,349 INFO L93 Difference]: Finished difference Result 751 states and 878 transitions.
[2022-02-15 02:06:37,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states.
[2022-02-15 02:06:37,349 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 58
[2022-02-15 02:06:37,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:06:37,350 INFO L225 Difference]: With dead ends: 751
[2022-02-15 02:06:37,350 INFO L226 Difference]: Without dead ends: 463
[2022-02-15 02:06:37,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 12 SyntacticMatches, 20 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702
[2022-02-15 02:06:37,351 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 46 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 990 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 1007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2022-02-15 02:06:37,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 49 Invalid, 1007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 990 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2022-02-15 02:06:37,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states.
[2022-02-15 02:06:37,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 370.
[2022-02-15 02:06:37,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 355 states have (on average 1.1915492957746479) internal successors, (423), 358 states have internal predecessors, (423), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:06:37,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 440 transitions.
[2022-02-15 02:06:37,585 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 440 transitions. Word has length 58
[2022-02-15 02:06:37,585 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:06:37,585 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 440 transitions.
[2022-02-15 02:06:37,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:06:37,585 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 440 transitions.
[2022-02-15 02:06:37,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59
[2022-02-15 02:06:37,585 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:06:37,586 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 9, 3, 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 02:06:37,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69
[2022-02-15 02:06:37,586 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:06:37,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:06:37,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1096321316, now seen corresponding path program 58 times
[2022-02-15 02:06:37,586 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:06:37,586 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2027077061]
[2022-02-15 02:06:37,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:06:37,636 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:37,669 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:37,670 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:06:37,716 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:37,767 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:37,767 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:06:37,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:06:37,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:37,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:06:37,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:37,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:06:37,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:37,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:06:38,617 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:06:38,618 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2027077061]
[2022-02-15 02:06:38,618 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2027077061] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:06:38,618 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:06:38,618 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27
[2022-02-15 02:06:38,618 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929083215]
[2022-02-15 02:06:38,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:06:38,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states
[2022-02-15 02:06:38,618 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:06:38,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants.
[2022-02-15 02:06:38,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870
[2022-02-15 02:06:38,619 INFO L87 Difference]: Start difference. First operand 370 states and 440 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:06:39,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:06:39,502 INFO L93 Difference]: Finished difference Result 723 states and 850 transitions.
[2022-02-15 02:06:39,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states.
[2022-02-15 02:06:39,502 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 58
[2022-02-15 02:06:39,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:06:39,504 INFO L225 Difference]: With dead ends: 723
[2022-02-15 02:06:39,504 INFO L226 Difference]: Without dead ends: 435
[2022-02-15 02:06:39,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 6 SyntacticMatches, 19 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=170, Invalid=952, Unknown=0, NotChecked=0, Total=1122
[2022-02-15 02:06:39,505 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 51 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 1307 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 1327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2022-02-15 02:06:39,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 73 Invalid, 1327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1307 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2022-02-15 02:06:39,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states.
[2022-02-15 02:06:39,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 370.
[2022-02-15 02:06:39,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 355 states have (on average 1.1915492957746479) internal successors, (423), 358 states have internal predecessors, (423), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:06:39,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 440 transitions.
[2022-02-15 02:06:39,735 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 440 transitions. Word has length 58
[2022-02-15 02:06:39,735 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:06:39,735 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 440 transitions.
[2022-02-15 02:06:39,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:06:39,735 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 440 transitions.
[2022-02-15 02:06:39,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59
[2022-02-15 02:06:39,735 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:06:39,735 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 8, 4, 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 02:06:39,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70
[2022-02-15 02:06:39,736 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:06:39,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:06:39,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1940326818, now seen corresponding path program 59 times
[2022-02-15 02:06:39,736 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:06:39,736 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1971149777]
[2022-02-15 02:06:39,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:06:39,783 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:39,828 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:39,828 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:06:39,863 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:39,904 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:39,905 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:06:39,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:06:39,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:39,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:06:39,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:39,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:06:39,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:39,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:06:40,449 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:06:40,449 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1971149777]
[2022-02-15 02:06:40,449 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1971149777] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:06:40,449 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:06:40,449 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24
[2022-02-15 02:06:40,449 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521537517]
[2022-02-15 02:06:40,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:06:40,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states
[2022-02-15 02:06:40,450 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:06:40,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants.
[2022-02-15 02:06:40,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650
[2022-02-15 02:06:40,450 INFO L87 Difference]: Start difference. First operand 370 states and 440 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:06:41,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:06:41,390 INFO L93 Difference]: Finished difference Result 742 states and 873 transitions.
[2022-02-15 02:06:41,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states.
[2022-02-15 02:06:41,391 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 58
[2022-02-15 02:06:41,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:06:41,392 INFO L225 Difference]: With dead ends: 742
[2022-02-15 02:06:41,392 INFO L226 Difference]: Without dead ends: 454
[2022-02-15 02:06:41,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 12 SyntacticMatches, 18 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812
[2022-02-15 02:06:41,392 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 61 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 1597 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 1613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time
[2022-02-15 02:06:41,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 52 Invalid, 1613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1597 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time]
[2022-02-15 02:06:41,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states.
[2022-02-15 02:06:41,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 370.
[2022-02-15 02:06:41,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 355 states have (on average 1.1915492957746479) internal successors, (423), 358 states have internal predecessors, (423), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:06:41,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 440 transitions.
[2022-02-15 02:06:41,624 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 440 transitions. Word has length 58
[2022-02-15 02:06:41,624 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:06:41,624 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 440 transitions.
[2022-02-15 02:06:41,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:06:41,625 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 440 transitions.
[2022-02-15 02:06:41,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59
[2022-02-15 02:06:41,625 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:06:41,625 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 7, 5, 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 02:06:41,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71
[2022-02-15 02:06:41,625 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:06:41,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:06:41,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1665567204, now seen corresponding path program 60 times
[2022-02-15 02:06:41,626 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:06:41,626 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [648526481]
[2022-02-15 02:06:41,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:06:41,686 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:41,729 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:41,730 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:06:41,774 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:41,826 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:41,826 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:06:41,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:06:41,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:41,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:06:41,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:41,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:06:41,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:41,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:06:42,495 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:06:42,495 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [648526481]
[2022-02-15 02:06:42,495 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [648526481] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:06:42,495 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:06:42,495 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25
[2022-02-15 02:06:42,495 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681810258]
[2022-02-15 02:06:42,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:06:42,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states
[2022-02-15 02:06:42,496 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:06:42,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants.
[2022-02-15 02:06:42,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702
[2022-02-15 02:06:42,496 INFO L87 Difference]: Start difference. First operand 370 states and 440 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:06:43,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:06:43,558 INFO L93 Difference]: Finished difference Result 733 states and 864 transitions.
[2022-02-15 02:06:43,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states.
[2022-02-15 02:06:43,559 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 58
[2022-02-15 02:06:43,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:06:43,560 INFO L225 Difference]: With dead ends: 733
[2022-02-15 02:06:43,560 INFO L226 Difference]: Without dead ends: 445
[2022-02-15 02:06:43,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 12 SyntacticMatches, 17 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870
[2022-02-15 02:06:43,561 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 64 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 1567 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 1584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time
[2022-02-15 02:06:43,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 52 Invalid, 1584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1567 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time]
[2022-02-15 02:06:43,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states.
[2022-02-15 02:06:43,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 370.
[2022-02-15 02:06:43,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 355 states have (on average 1.1915492957746479) internal successors, (423), 358 states have internal predecessors, (423), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:06:43,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 440 transitions.
[2022-02-15 02:06:43,797 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 440 transitions. Word has length 58
[2022-02-15 02:06:43,797 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:06:43,797 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 440 transitions.
[2022-02-15 02:06:43,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:06:43,797 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 440 transitions.
[2022-02-15 02:06:43,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59
[2022-02-15 02:06:43,798 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:06:43,798 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 6, 6, 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 02:06:43,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72
[2022-02-15 02:06:43,798 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:06:43,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:06:43,798 INFO L85 PathProgramCache]: Analyzing trace with hash -279363810, now seen corresponding path program 61 times
[2022-02-15 02:06:43,798 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:06:43,798 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1313346469]
[2022-02-15 02:06:43,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:06:43,847 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:43,890 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:43,890 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:06:43,938 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:43,980 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:43,980 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:06:43,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:06:43,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:44,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:06:44,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:44,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:06:44,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:44,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:06:44,548 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:06:44,549 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1313346469]
[2022-02-15 02:06:44,549 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1313346469] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:06:44,549 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:06:44,549 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26
[2022-02-15 02:06:44,549 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398943288]
[2022-02-15 02:06:44,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:06:44,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states
[2022-02-15 02:06:44,549 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:06:44,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants.
[2022-02-15 02:06:44,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756
[2022-02-15 02:06:44,550 INFO L87 Difference]: Start difference. First operand 370 states and 440 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:06:45,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:06:45,497 INFO L93 Difference]: Finished difference Result 724 states and 855 transitions.
[2022-02-15 02:06:45,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states.
[2022-02-15 02:06:45,497 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 58
[2022-02-15 02:06:45,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:06:45,499 INFO L225 Difference]: With dead ends: 724
[2022-02-15 02:06:45,499 INFO L226 Difference]: Without dead ends: 436
[2022-02-15 02:06:45,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 12 SyntacticMatches, 16 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930
[2022-02-15 02:06:45,499 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 68 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 1463 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time
[2022-02-15 02:06:45,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 48 Invalid, 1481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1463 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time]
[2022-02-15 02:06:45,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states.
[2022-02-15 02:06:45,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 370.
[2022-02-15 02:06:45,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 355 states have (on average 1.1915492957746479) internal successors, (423), 358 states have internal predecessors, (423), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:06:45,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 440 transitions.
[2022-02-15 02:06:45,737 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 440 transitions. Word has length 58
[2022-02-15 02:06:45,737 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:06:45,737 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 440 transitions.
[2022-02-15 02:06:45,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:06:45,737 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 440 transitions.
[2022-02-15 02:06:45,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59
[2022-02-15 02:06:45,738 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:06:45,738 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 7, 5, 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 02:06:45,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73
[2022-02-15 02:06:45,738 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:06:45,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:06:45,738 INFO L85 PathProgramCache]: Analyzing trace with hash -217324196, now seen corresponding path program 62 times
[2022-02-15 02:06:45,738 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:06:45,739 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [796252726]
[2022-02-15 02:06:45,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:06:45,805 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:45,851 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:45,852 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:06:45,886 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:45,929 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:45,929 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:06:45,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:06:45,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:45,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:06:45,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:45,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:06:45,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:45,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:06:46,508 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:06:46,508 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [796252726]
[2022-02-15 02:06:46,508 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [796252726] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:06:46,508 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:06:46,508 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27
[2022-02-15 02:06:46,508 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849052593]
[2022-02-15 02:06:46,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:06:46,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states
[2022-02-15 02:06:46,509 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:06:46,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants.
[2022-02-15 02:06:46,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812
[2022-02-15 02:06:46,509 INFO L87 Difference]: Start difference. First operand 370 states and 440 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:06:47,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:06:47,396 INFO L93 Difference]: Finished difference Result 715 states and 846 transitions.
[2022-02-15 02:06:47,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states.
[2022-02-15 02:06:47,397 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 58
[2022-02-15 02:06:47,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:06:47,398 INFO L225 Difference]: With dead ends: 715
[2022-02-15 02:06:47,398 INFO L226 Difference]: Without dead ends: 427
[2022-02-15 02:06:47,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 12 SyntacticMatches, 15 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=155, Invalid=837, Unknown=0, NotChecked=0, Total=992
[2022-02-15 02:06:47,398 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 65 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 1476 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 1495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time
[2022-02-15 02:06:47,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 54 Invalid, 1495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1476 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time]
[2022-02-15 02:06:47,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states.
[2022-02-15 02:06:47,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 370.
[2022-02-15 02:06:47,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 355 states have (on average 1.1915492957746479) internal successors, (423), 358 states have internal predecessors, (423), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:06:47,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 440 transitions.
[2022-02-15 02:06:47,649 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 440 transitions. Word has length 58
[2022-02-15 02:06:47,649 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:06:47,649 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 440 transitions.
[2022-02-15 02:06:47,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:06:47,649 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 440 transitions.
[2022-02-15 02:06:47,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59
[2022-02-15 02:06:47,649 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:06:47,649 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 8, 4, 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 02:06:47,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74
[2022-02-15 02:06:47,650 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:06:47,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:06:47,650 INFO L85 PathProgramCache]: Analyzing trace with hash -2022762530, now seen corresponding path program 63 times
[2022-02-15 02:06:47,650 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:06:47,650 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1848511590]
[2022-02-15 02:06:47,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:06:47,686 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:47,720 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:47,720 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:06:47,763 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:47,818 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:47,819 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:06:47,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:06:47,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:47,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:06:47,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:47,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:06:47,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:47,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:06:48,403 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:06:48,403 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1848511590]
[2022-02-15 02:06:48,403 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1848511590] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:06:48,403 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:06:48,403 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28
[2022-02-15 02:06:48,403 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070816673]
[2022-02-15 02:06:48,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:06:48,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states
[2022-02-15 02:06:48,404 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:06:48,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants.
[2022-02-15 02:06:48,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870
[2022-02-15 02:06:48,404 INFO L87 Difference]: Start difference. First operand 370 states and 440 transitions. Second operand has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:06:49,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:06:49,203 INFO L93 Difference]: Finished difference Result 706 states and 837 transitions.
[2022-02-15 02:06:49,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states.
[2022-02-15 02:06:49,203 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 58
[2022-02-15 02:06:49,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:06:49,204 INFO L225 Difference]: With dead ends: 706
[2022-02-15 02:06:49,205 INFO L226 Difference]: Without dead ends: 418
[2022-02-15 02:06:49,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 12 SyntacticMatches, 14 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=165, Invalid=891, Unknown=0, NotChecked=0, Total=1056
[2022-02-15 02:06:49,205 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 72 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 1199 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 1219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2022-02-15 02:06:49,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 49 Invalid, 1219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1199 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2022-02-15 02:06:49,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states.
[2022-02-15 02:06:49,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 370.
[2022-02-15 02:06:49,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 355 states have (on average 1.1915492957746479) internal successors, (423), 358 states have internal predecessors, (423), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:06:49,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 440 transitions.
[2022-02-15 02:06:49,447 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 440 transitions. Word has length 58
[2022-02-15 02:06:49,447 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:06:49,447 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 440 transitions.
[2022-02-15 02:06:49,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:06:49,447 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 440 transitions.
[2022-02-15 02:06:49,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59
[2022-02-15 02:06:49,448 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:06:49,448 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 9, 3, 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 02:06:49,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75
[2022-02-15 02:06:49,448 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:06:49,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:06:49,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1454556316, now seen corresponding path program 64 times
[2022-02-15 02:06:49,448 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:06:49,448 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1043296652]
[2022-02-15 02:06:49,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:06:49,485 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:49,529 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:49,529 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:06:49,563 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:49,607 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:49,607 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:06:49,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:06:49,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:49,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:06:49,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:49,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:06:49,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:49,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:06:50,194 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:06:50,194 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1043296652]
[2022-02-15 02:06:50,194 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1043296652] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:06:50,194 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:06:50,195 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29
[2022-02-15 02:06:50,195 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893285880]
[2022-02-15 02:06:50,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:06:50,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states
[2022-02-15 02:06:50,195 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:06:50,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants.
[2022-02-15 02:06:50,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=792, Unknown=0, NotChecked=0, Total=930
[2022-02-15 02:06:50,195 INFO L87 Difference]: Start difference. First operand 370 states and 440 transitions. Second operand has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 28 states have internal predecessors, (52), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:06:51,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:06:51,043 INFO L93 Difference]: Finished difference Result 697 states and 828 transitions.
[2022-02-15 02:06:51,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states.
[2022-02-15 02:06:51,043 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 28 states have internal predecessors, (52), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 58
[2022-02-15 02:06:51,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:06:51,044 INFO L225 Difference]: With dead ends: 697
[2022-02-15 02:06:51,044 INFO L226 Difference]: Without dead ends: 409
[2022-02-15 02:06:51,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 12 SyntacticMatches, 13 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=175, Invalid=947, Unknown=0, NotChecked=0, Total=1122
[2022-02-15 02:06:51,045 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 76 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1516 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 1537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time
[2022-02-15 02:06:51,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 56 Invalid, 1537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1516 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time]
[2022-02-15 02:06:51,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states.
[2022-02-15 02:06:51,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 370.
[2022-02-15 02:06:51,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 355 states have (on average 1.1915492957746479) internal successors, (423), 358 states have internal predecessors, (423), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:06:51,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 440 transitions.
[2022-02-15 02:06:51,290 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 440 transitions. Word has length 58
[2022-02-15 02:06:51,290 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:06:51,290 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 440 transitions.
[2022-02-15 02:06:51,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 28 states have internal predecessors, (52), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:06:51,290 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 440 transitions.
[2022-02-15 02:06:51,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59
[2022-02-15 02:06:51,290 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:06:51,290 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 10, 2, 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 02:06:51,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76
[2022-02-15 02:06:51,291 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:06:51,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:06:51,291 INFO L85 PathProgramCache]: Analyzing trace with hash -133791586, now seen corresponding path program 65 times
[2022-02-15 02:06:51,291 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:06:51,291 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1389287279]
[2022-02-15 02:06:51,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:06:51,338 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:51,388 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:51,388 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:06:51,425 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:51,458 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:51,458 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:06:51,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:06:51,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:51,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:06:51,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:51,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:06:51,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:51,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:06:52,070 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:06:52,070 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1389287279]
[2022-02-15 02:06:52,070 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1389287279] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:06:52,070 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:06:52,070 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30
[2022-02-15 02:06:52,071 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071162477]
[2022-02-15 02:06:52,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:06:52,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states
[2022-02-15 02:06:52,071 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:06:52,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants.
[2022-02-15 02:06:52,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=846, Unknown=0, NotChecked=0, Total=992
[2022-02-15 02:06:52,071 INFO L87 Difference]: Start difference. First operand 370 states and 440 transitions. Second operand has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 states have internal predecessors, (52), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:06:52,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:06:52,967 INFO L93 Difference]: Finished difference Result 692 states and 823 transitions.
[2022-02-15 02:06:52,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states.
[2022-02-15 02:06:52,967 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 states have internal predecessors, (52), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 58
[2022-02-15 02:06:52,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:06:52,969 INFO L225 Difference]: With dead ends: 692
[2022-02-15 02:06:52,969 INFO L226 Difference]: Without dead ends: 404
[2022-02-15 02:06:52,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 12 SyntacticMatches, 12 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=185, Invalid=1005, Unknown=0, NotChecked=0, Total=1190
[2022-02-15 02:06:52,969 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 69 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1733 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 1755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time
[2022-02-15 02:06:52,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 66 Invalid, 1755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1733 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time]
[2022-02-15 02:06:52,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states.
[2022-02-15 02:06:53,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 370.
[2022-02-15 02:06:53,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 355 states have (on average 1.1915492957746479) internal successors, (423), 358 states have internal predecessors, (423), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:06:53,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 440 transitions.
[2022-02-15 02:06:53,213 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 440 transitions. Word has length 58
[2022-02-15 02:06:53,213 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:06:53,213 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 440 transitions.
[2022-02-15 02:06:53,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 states have internal predecessors, (52), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:06:53,213 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 440 transitions.
[2022-02-15 02:06:53,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59
[2022-02-15 02:06:53,214 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:06:53,214 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 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 02:06:53,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77
[2022-02-15 02:06:53,214 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:06:53,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:06:53,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1144908836, now seen corresponding path program 66 times
[2022-02-15 02:06:53,214 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:06:53,214 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [134192205]
[2022-02-15 02:06:53,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:06:53,248 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:53,248 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE
[2022-02-15 02:06:53,282 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:53,324 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:53,325 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:06:53,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:06:53,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:53,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:06:53,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:53,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:06:53,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:53,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:06:53,952 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:06:53,952 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [134192205]
[2022-02-15 02:06:53,952 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [134192205] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:06:53,952 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:06:53,952 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31
[2022-02-15 02:06:53,952 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198772847]
[2022-02-15 02:06:53,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:06:53,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states
[2022-02-15 02:06:53,953 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:06:53,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants.
[2022-02-15 02:06:53,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=902, Unknown=0, NotChecked=0, Total=1056
[2022-02-15 02:06:53,953 INFO L87 Difference]: Start difference. First operand 370 states and 440 transitions. Second operand has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:06:54,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:06:54,891 INFO L93 Difference]: Finished difference Result 706 states and 847 transitions.
[2022-02-15 02:06:54,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states.
[2022-02-15 02:06:54,891 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 58
[2022-02-15 02:06:54,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:06:54,892 INFO L225 Difference]: With dead ends: 706
[2022-02-15 02:06:54,892 INFO L226 Difference]: Without dead ends: 407
[2022-02-15 02:06:54,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 12 SyntacticMatches, 11 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=195, Invalid=1065, Unknown=0, NotChecked=0, Total=1260
[2022-02-15 02:06:54,893 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 79 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 1926 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time
[2022-02-15 02:06:54,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 58 Invalid, 1950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1926 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time]
[2022-02-15 02:06:54,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states.
[2022-02-15 02:06:55,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 382.
[2022-02-15 02:06:55,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 367 states have (on average 1.1961852861035422) internal successors, (439), 370 states have internal predecessors, (439), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:06:55,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 456 transitions.
[2022-02-15 02:06:55,139 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 456 transitions. Word has length 58
[2022-02-15 02:06:55,139 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:06:55,139 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 456 transitions.
[2022-02-15 02:06:55,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:06:55,140 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 456 transitions.
[2022-02-15 02:06:55,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62
[2022-02-15 02:06:55,140 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:06:55,140 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 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 02:06:55,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78
[2022-02-15 02:06:55,140 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:06:55,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:06:55,140 INFO L85 PathProgramCache]: Analyzing trace with hash 831909855, now seen corresponding path program 67 times
[2022-02-15 02:06:55,140 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:06:55,140 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1356756497]
[2022-02-15 02:06:55,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:06:55,188 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:55,231 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:55,231 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:06:55,265 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:55,298 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:55,298 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:06:55,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:06:55,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:55,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:06:55,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:55,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:06:55,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:55,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:06:55,887 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:06:55,888 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1356756497]
[2022-02-15 02:06:55,888 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1356756497] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:06:55,888 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:06:55,888 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22
[2022-02-15 02:06:55,888 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993471127]
[2022-02-15 02:06:55,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:06:55,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states
[2022-02-15 02:06:55,888 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:06:55,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants.
[2022-02-15 02:06:55,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552
[2022-02-15 02:06:55,888 INFO L87 Difference]: Start difference. First operand 382 states and 456 transitions. Second operand has 22 states, 22 states have (on average 2.5) internal successors, (55), 21 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:06:56,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:06:56,871 INFO L93 Difference]: Finished difference Result 790 states and 928 transitions.
[2022-02-15 02:06:56,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states.
[2022-02-15 02:06:56,871 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 21 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 61
[2022-02-15 02:06:56,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:06:56,872 INFO L225 Difference]: With dead ends: 790
[2022-02-15 02:06:56,873 INFO L226 Difference]: Without dead ends: 493
[2022-02-15 02:06:56,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 12 SyntacticMatches, 23 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702
[2022-02-15 02:06:56,873 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 47 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1425 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 1438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time
[2022-02-15 02:06:56,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 56 Invalid, 1438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1425 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time]
[2022-02-15 02:06:56,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states.
[2022-02-15 02:06:57,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 391.
[2022-02-15 02:06:57,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 376 states have (on average 1.1914893617021276) internal successors, (448), 379 states have internal predecessors, (448), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:06:57,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 465 transitions.
[2022-02-15 02:06:57,155 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 465 transitions. Word has length 61
[2022-02-15 02:06:57,155 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:06:57,155 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 465 transitions.
[2022-02-15 02:06:57,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 21 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:06:57,156 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 465 transitions.
[2022-02-15 02:06:57,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62
[2022-02-15 02:06:57,156 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:06:57,156 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 11, 2, 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 02:06:57,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79
[2022-02-15 02:06:57,156 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:06:57,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:06:57,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1217477987, now seen corresponding path program 68 times
[2022-02-15 02:06:57,157 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:06:57,157 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [124548964]
[2022-02-15 02:06:57,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:06:57,214 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:57,271 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:57,271 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:06:57,314 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:57,354 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:57,354 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:06:57,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:06:57,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:57,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:06:57,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:57,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:06:57,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:57,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:06:58,055 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:06:58,055 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [124548964]
[2022-02-15 02:06:58,055 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [124548964] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:06:58,055 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:06:58,055 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23
[2022-02-15 02:06:58,055 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229304314]
[2022-02-15 02:06:58,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:06:58,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states
[2022-02-15 02:06:58,056 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:06:58,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants.
[2022-02-15 02:06:58,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600
[2022-02-15 02:06:58,056 INFO L87 Difference]: Start difference. First operand 391 states and 465 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:06:59,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:06:59,196 INFO L93 Difference]: Finished difference Result 808 states and 946 transitions.
[2022-02-15 02:06:59,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states.
[2022-02-15 02:06:59,197 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 61
[2022-02-15 02:06:59,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:06:59,198 INFO L225 Difference]: With dead ends: 808
[2022-02-15 02:06:59,198 INFO L226 Difference]: Without dead ends: 502
[2022-02-15 02:06:59,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 12 SyntacticMatches, 22 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756
[2022-02-15 02:06:59,199 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 52 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 1397 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 1411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time
[2022-02-15 02:06:59,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 54 Invalid, 1411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1397 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time]
[2022-02-15 02:06:59,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states.
[2022-02-15 02:06:59,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 391.
[2022-02-15 02:06:59,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 376 states have (on average 1.1914893617021276) internal successors, (448), 379 states have internal predecessors, (448), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:06:59,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 465 transitions.
[2022-02-15 02:06:59,492 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 465 transitions. Word has length 61
[2022-02-15 02:06:59,493 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:06:59,493 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 465 transitions.
[2022-02-15 02:06:59,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:06:59,493 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 465 transitions.
[2022-02-15 02:06:59,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62
[2022-02-15 02:06:59,493 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:06:59,493 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 10, 3, 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 02:06:59,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80
[2022-02-15 02:06:59,493 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:06:59,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:06:59,494 INFO L85 PathProgramCache]: Analyzing trace with hash -793831265, now seen corresponding path program 69 times
[2022-02-15 02:06:59,494 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:06:59,494 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1992360552]
[2022-02-15 02:06:59,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:06:59,543 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:59,576 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:59,577 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:06:59,611 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:59,655 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:06:59,655 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:06:59,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:06:59,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:59,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:06:59,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:59,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:06:59,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:06:59,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:07:00,236 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:07:00,237 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1992360552]
[2022-02-15 02:07:00,237 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1992360552] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:07:00,237 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:07:00,237 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24
[2022-02-15 02:07:00,237 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599897149]
[2022-02-15 02:07:00,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:07:00,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states
[2022-02-15 02:07:00,237 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:07:00,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants.
[2022-02-15 02:07:00,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650
[2022-02-15 02:07:00,237 INFO L87 Difference]: Start difference. First operand 391 states and 465 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:07:01,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:07:01,325 INFO L93 Difference]: Finished difference Result 825 states and 966 transitions.
[2022-02-15 02:07:01,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states.
[2022-02-15 02:07:01,325 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 61
[2022-02-15 02:07:01,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:07:01,326 INFO L225 Difference]: With dead ends: 825
[2022-02-15 02:07:01,326 INFO L226 Difference]: Without dead ends: 519
[2022-02-15 02:07:01,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 12 SyntacticMatches, 21 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812
[2022-02-15 02:07:01,327 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 58 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1300 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time
[2022-02-15 02:07:01,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 53 Invalid, 1316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1300 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time]
[2022-02-15 02:07:01,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states.
[2022-02-15 02:07:01,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 391.
[2022-02-15 02:07:01,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 376 states have (on average 1.1914893617021276) internal successors, (448), 379 states have internal predecessors, (448), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:07:01,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 465 transitions.
[2022-02-15 02:07:01,645 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 465 transitions. Word has length 61
[2022-02-15 02:07:01,645 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:07:01,645 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 465 transitions.
[2022-02-15 02:07:01,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:07:01,646 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 465 transitions.
[2022-02-15 02:07:01,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62
[2022-02-15 02:07:01,646 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:07:01,646 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 9, 4, 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 02:07:01,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81
[2022-02-15 02:07:01,646 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:07:01,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:07:01,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1823190563, now seen corresponding path program 70 times
[2022-02-15 02:07:01,647 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:07:01,647 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [335938518]
[2022-02-15 02:07:01,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:07:01,695 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:01,748 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:01,748 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:07:01,782 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:01,815 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:01,815 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:07:01,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:07:01,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:07:01,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:07:01,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:07:01,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:07:01,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:07:01,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:07:02,408 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:07:02,409 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [335938518]
[2022-02-15 02:07:02,409 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [335938518] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:07:02,409 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:07:02,409 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25
[2022-02-15 02:07:02,409 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365052774]
[2022-02-15 02:07:02,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:07:02,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states
[2022-02-15 02:07:02,409 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:07:02,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants.
[2022-02-15 02:07:02,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702
[2022-02-15 02:07:02,409 INFO L87 Difference]: Start difference. First operand 391 states and 465 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:07:03,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:07:03,538 INFO L93 Difference]: Finished difference Result 790 states and 928 transitions.
[2022-02-15 02:07:03,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states.
[2022-02-15 02:07:03,539 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 61
[2022-02-15 02:07:03,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:07:03,540 INFO L225 Difference]: With dead ends: 790
[2022-02-15 02:07:03,540 INFO L226 Difference]: Without dead ends: 484
[2022-02-15 02:07:03,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 12 SyntacticMatches, 20 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870
[2022-02-15 02:07:03,540 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 57 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 1603 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 1619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time
[2022-02-15 02:07:03,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 63 Invalid, 1619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1603 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time]
[2022-02-15 02:07:03,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states.
[2022-02-15 02:07:03,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 391.
[2022-02-15 02:07:03,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 376 states have (on average 1.1914893617021276) internal successors, (448), 379 states have internal predecessors, (448), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:07:03,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 465 transitions.
[2022-02-15 02:07:03,871 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 465 transitions. Word has length 61
[2022-02-15 02:07:03,871 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:07:03,871 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 465 transitions.
[2022-02-15 02:07:03,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:07:03,871 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 465 transitions.
[2022-02-15 02:07:03,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62
[2022-02-15 02:07:03,871 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:07:03,871 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 8, 5, 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 02:07:03,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82
[2022-02-15 02:07:03,872 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:07:03,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:07:03,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1627771231, now seen corresponding path program 71 times
[2022-02-15 02:07:03,872 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:07:03,872 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1583337177]
[2022-02-15 02:07:03,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:07:03,908 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:03,942 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:03,942 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:07:03,977 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:04,020 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:04,020 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:07:04,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:07:04,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:07:04,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:07:04,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:07:04,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:07:04,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:07:04,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:07:04,662 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:07:04,663 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1583337177]
[2022-02-15 02:07:04,663 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1583337177] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:07:04,663 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:07:04,663 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26
[2022-02-15 02:07:04,663 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127437147]
[2022-02-15 02:07:04,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:07:04,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states
[2022-02-15 02:07:04,663 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:07:04,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants.
[2022-02-15 02:07:04,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812
[2022-02-15 02:07:04,664 INFO L87 Difference]: Start difference. First operand 391 states and 465 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:07:05,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:07:05,622 INFO L93 Difference]: Finished difference Result 781 states and 915 transitions.
[2022-02-15 02:07:05,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states.
[2022-02-15 02:07:05,622 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 61
[2022-02-15 02:07:05,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:07:05,623 INFO L225 Difference]: With dead ends: 781
[2022-02-15 02:07:05,623 INFO L226 Difference]: Without dead ends: 475
[2022-02-15 02:07:05,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 12 SyntacticMatches, 19 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930
[2022-02-15 02:07:05,624 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 61 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 1216 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2022-02-15 02:07:05,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 44 Invalid, 1236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1216 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2022-02-15 02:07:05,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states.
[2022-02-15 02:07:05,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 391.
[2022-02-15 02:07:05,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 376 states have (on average 1.1914893617021276) internal successors, (448), 379 states have internal predecessors, (448), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:07:05,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 465 transitions.
[2022-02-15 02:07:05,946 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 465 transitions. Word has length 61
[2022-02-15 02:07:05,946 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:07:05,946 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 465 transitions.
[2022-02-15 02:07:05,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:07:05,946 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 465 transitions.
[2022-02-15 02:07:05,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62
[2022-02-15 02:07:05,947 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:07:05,947 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 7, 6, 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 02:07:05,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83
[2022-02-15 02:07:05,947 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:07:05,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:07:05,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1902530845, now seen corresponding path program 72 times
[2022-02-15 02:07:05,947 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:07:05,947 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2016229935]
[2022-02-15 02:07:05,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:07:05,995 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:06,041 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:06,041 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:07:06,087 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:06,129 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:06,129 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:07:06,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:07:06,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:07:06,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:07:06,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:07:06,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:07:06,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:07:06,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:07:06,743 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:07:06,743 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2016229935]
[2022-02-15 02:07:06,743 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2016229935] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:07:06,743 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:07:06,743 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27
[2022-02-15 02:07:06,743 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095196594]
[2022-02-15 02:07:06,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:07:06,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states
[2022-02-15 02:07:06,743 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:07:06,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants.
[2022-02-15 02:07:06,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812
[2022-02-15 02:07:06,744 INFO L87 Difference]: Start difference. First operand 391 states and 465 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:07:07,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:07:07,767 INFO L93 Difference]: Finished difference Result 772 states and 910 transitions.
[2022-02-15 02:07:07,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states.
[2022-02-15 02:07:07,768 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 61
[2022-02-15 02:07:07,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:07:07,769 INFO L225 Difference]: With dead ends: 772
[2022-02-15 02:07:07,769 INFO L226 Difference]: Without dead ends: 466
[2022-02-15 02:07:07,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 12 SyntacticMatches, 18 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=148, Invalid=844, Unknown=0, NotChecked=0, Total=992
[2022-02-15 02:07:07,769 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 65 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 1544 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 1562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time
[2022-02-15 02:07:07,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 57 Invalid, 1562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1544 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time]
[2022-02-15 02:07:07,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states.
[2022-02-15 02:07:08,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 391.
[2022-02-15 02:07:08,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 376 states have (on average 1.1914893617021276) internal successors, (448), 379 states have internal predecessors, (448), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:07:08,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 465 transitions.
[2022-02-15 02:07:08,097 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 465 transitions. Word has length 61
[2022-02-15 02:07:08,098 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:07:08,098 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 465 transitions.
[2022-02-15 02:07:08,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:07:08,098 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 465 transitions.
[2022-02-15 02:07:08,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62
[2022-02-15 02:07:08,099 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:07:08,099 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 7, 6, 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 02:07:08,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84
[2022-02-15 02:07:08,099 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:07:08,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:07:08,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1006233057, now seen corresponding path program 73 times
[2022-02-15 02:07:08,099 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:07:08,100 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1614349421]
[2022-02-15 02:07:08,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:07:08,147 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:08,190 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:08,190 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:07:08,236 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:08,268 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:08,268 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:07:08,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:07:08,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:07:08,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:07:08,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:07:08,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:07:08,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:07:08,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:07:08,907 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:07:08,907 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1614349421]
[2022-02-15 02:07:08,907 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1614349421] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:07:08,907 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:07:08,907 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28
[2022-02-15 02:07:08,908 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231427283]
[2022-02-15 02:07:08,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:07:08,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states
[2022-02-15 02:07:08,908 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:07:08,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants.
[2022-02-15 02:07:08,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870
[2022-02-15 02:07:08,908 INFO L87 Difference]: Start difference. First operand 391 states and 465 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:07:10,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:07:10,029 INFO L93 Difference]: Finished difference Result 763 states and 901 transitions.
[2022-02-15 02:07:10,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states.
[2022-02-15 02:07:10,029 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 61
[2022-02-15 02:07:10,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:07:10,031 INFO L225 Difference]: With dead ends: 763
[2022-02-15 02:07:10,031 INFO L226 Difference]: Without dead ends: 457
[2022-02-15 02:07:10,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 12 SyntacticMatches, 17 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=158, Invalid=898, Unknown=0, NotChecked=0, Total=1056
[2022-02-15 02:07:10,032 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 69 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 1782 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 1801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time
[2022-02-15 02:07:10,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 54 Invalid, 1801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1782 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time]
[2022-02-15 02:07:10,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states.
[2022-02-15 02:07:10,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 391.
[2022-02-15 02:07:10,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 376 states have (on average 1.1914893617021276) internal successors, (448), 379 states have internal predecessors, (448), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:07:10,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 465 transitions.
[2022-02-15 02:07:10,413 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 465 transitions. Word has length 61
[2022-02-15 02:07:10,414 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:07:10,414 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 465 transitions.
[2022-02-15 02:07:10,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:07:10,414 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 465 transitions.
[2022-02-15 02:07:10,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62
[2022-02-15 02:07:10,414 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:07:10,414 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 8, 5, 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 02:07:10,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85
[2022-02-15 02:07:10,415 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:07:10,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:07:10,415 INFO L85 PathProgramCache]: Analyzing trace with hash -944193443, now seen corresponding path program 74 times
[2022-02-15 02:07:10,415 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:07:10,415 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [84447642]
[2022-02-15 02:07:10,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:07:10,465 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:10,521 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:10,522 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:07:10,557 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:10,589 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:10,589 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:07:10,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:07:10,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:07:10,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:07:10,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:07:10,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:07:10,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:07:10,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:07:11,208 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:07:11,208 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [84447642]
[2022-02-15 02:07:11,208 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [84447642] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:07:11,208 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:07:11,208 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29
[2022-02-15 02:07:11,208 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2949411]
[2022-02-15 02:07:11,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:07:11,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states
[2022-02-15 02:07:11,209 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:07:11,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants.
[2022-02-15 02:07:11,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=850, Unknown=0, NotChecked=0, Total=992
[2022-02-15 02:07:11,209 INFO L87 Difference]: Start difference. First operand 391 states and 465 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:07:12,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:07:12,108 INFO L93 Difference]: Finished difference Result 763 states and 897 transitions.
[2022-02-15 02:07:12,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states.
[2022-02-15 02:07:12,108 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 61
[2022-02-15 02:07:12,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:07:12,109 INFO L225 Difference]: With dead ends: 763
[2022-02-15 02:07:12,109 INFO L226 Difference]: Without dead ends: 457
[2022-02-15 02:07:12,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 12 SyntacticMatches, 16 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=167, Invalid=955, Unknown=0, NotChecked=0, Total=1122
[2022-02-15 02:07:12,110 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 78 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 1157 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2022-02-15 02:07:12,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 40 Invalid, 1179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1157 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2022-02-15 02:07:12,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states.
[2022-02-15 02:07:12,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 391.
[2022-02-15 02:07:12,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 376 states have (on average 1.1914893617021276) internal successors, (448), 379 states have internal predecessors, (448), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:07:12,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 465 transitions.
[2022-02-15 02:07:12,440 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 465 transitions. Word has length 61
[2022-02-15 02:07:12,441 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:07:12,441 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 465 transitions.
[2022-02-15 02:07:12,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:07:12,441 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 465 transitions.
[2022-02-15 02:07:12,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62
[2022-02-15 02:07:12,441 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:07:12,441 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 9, 4, 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 02:07:12,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86
[2022-02-15 02:07:12,442 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:07:12,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:07:12,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1545335519, now seen corresponding path program 75 times
[2022-02-15 02:07:12,442 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:07:12,442 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1537424896]
[2022-02-15 02:07:12,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:07:12,486 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:12,545 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:12,545 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:07:12,590 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:12,640 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:12,641 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:07:12,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:07:12,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:07:12,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:07:12,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:07:12,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:07:12,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:07:12,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:07:13,352 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:07:13,353 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1537424896]
[2022-02-15 02:07:13,353 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1537424896] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:07:13,353 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:07:13,353 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30
[2022-02-15 02:07:13,353 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690285114]
[2022-02-15 02:07:13,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:07:13,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states
[2022-02-15 02:07:13,353 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:07:13,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants.
[2022-02-15 02:07:13,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=851, Unknown=0, NotChecked=0, Total=992
[2022-02-15 02:07:13,354 INFO L87 Difference]: Start difference. First operand 391 states and 465 transitions. Second operand has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 29 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:07:14,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:07:14,293 INFO L93 Difference]: Finished difference Result 745 states and 883 transitions.
[2022-02-15 02:07:14,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states.
[2022-02-15 02:07:14,295 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 29 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 61
[2022-02-15 02:07:14,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:07:14,296 INFO L225 Difference]: With dead ends: 745
[2022-02-15 02:07:14,296 INFO L226 Difference]: Without dead ends: 439
[2022-02-15 02:07:14,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 12 SyntacticMatches, 15 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=178, Invalid=1012, Unknown=0, NotChecked=0, Total=1190
[2022-02-15 02:07:14,297 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 81 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 1488 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time
[2022-02-15 02:07:14,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 44 Invalid, 1509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1488 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time]
[2022-02-15 02:07:14,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states.
[2022-02-15 02:07:14,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 391.
[2022-02-15 02:07:14,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 376 states have (on average 1.1914893617021276) internal successors, (448), 379 states have internal predecessors, (448), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:07:14,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 465 transitions.
[2022-02-15 02:07:14,633 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 465 transitions. Word has length 61
[2022-02-15 02:07:14,633 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:07:14,633 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 465 transitions.
[2022-02-15 02:07:14,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 29 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:07:14,633 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 465 transitions.
[2022-02-15 02:07:14,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62
[2022-02-15 02:07:14,633 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:07:14,633 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 10, 3, 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 02:07:14,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87
[2022-02-15 02:07:14,634 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:07:14,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:07:14,634 INFO L85 PathProgramCache]: Analyzing trace with hash 727687069, now seen corresponding path program 76 times
[2022-02-15 02:07:14,634 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:07:14,634 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1554268107]
[2022-02-15 02:07:14,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:07:14,683 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:14,716 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:14,716 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:07:14,750 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:14,803 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:14,803 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:07:14,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:07:14,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:07:14,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:07:14,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:07:14,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:07:14,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:07:14,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:07:15,509 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:07:15,509 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1554268107]
[2022-02-15 02:07:15,509 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1554268107] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:07:15,509 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:07:15,509 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31
[2022-02-15 02:07:15,510 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58455735]
[2022-02-15 02:07:15,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:07:15,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states
[2022-02-15 02:07:15,510 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:07:15,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants.
[2022-02-15 02:07:15,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=907, Unknown=0, NotChecked=0, Total=1056
[2022-02-15 02:07:15,510 INFO L87 Difference]: Start difference. First operand 391 states and 465 transitions. Second operand has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:07:16,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:07:16,383 INFO L93 Difference]: Finished difference Result 736 states and 874 transitions.
[2022-02-15 02:07:16,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states.
[2022-02-15 02:07:16,383 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 61
[2022-02-15 02:07:16,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:07:16,384 INFO L225 Difference]: With dead ends: 736
[2022-02-15 02:07:16,385 INFO L226 Difference]: Without dead ends: 430
[2022-02-15 02:07:16,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 12 SyntacticMatches, 14 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=188, Invalid=1072, Unknown=0, NotChecked=0, Total=1260
[2022-02-15 02:07:16,385 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 87 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 1333 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2022-02-15 02:07:16,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 44 Invalid, 1355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1333 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2022-02-15 02:07:16,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states.
[2022-02-15 02:07:16,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 391.
[2022-02-15 02:07:16,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 376 states have (on average 1.1914893617021276) internal successors, (448), 379 states have internal predecessors, (448), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:07:16,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 465 transitions.
[2022-02-15 02:07:16,726 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 465 transitions. Word has length 61
[2022-02-15 02:07:16,726 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:07:16,726 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 465 transitions.
[2022-02-15 02:07:16,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:07:16,726 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 465 transitions.
[2022-02-15 02:07:16,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62
[2022-02-15 02:07:16,727 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:07:16,727 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 11, 2, 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 02:07:16,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88
[2022-02-15 02:07:16,727 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:07:16,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:07:16,727 INFO L85 PathProgramCache]: Analyzing trace with hash -860660833, now seen corresponding path program 77 times
[2022-02-15 02:07:16,727 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:07:16,728 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1570642073]
[2022-02-15 02:07:16,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:07:16,776 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:16,819 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:16,819 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:07:16,866 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:16,898 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:16,898 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:07:16,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:07:16,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:07:16,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:07:16,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:07:16,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:07:16,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:07:16,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:07:17,557 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:07:17,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1570642073]
[2022-02-15 02:07:17,558 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1570642073] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:07:17,558 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:07:17,558 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32
[2022-02-15 02:07:17,558 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557448574]
[2022-02-15 02:07:17,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:07:17,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states
[2022-02-15 02:07:17,558 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:07:17,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants.
[2022-02-15 02:07:17,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=965, Unknown=0, NotChecked=0, Total=1122
[2022-02-15 02:07:17,558 INFO L87 Difference]: Start difference. First operand 391 states and 465 transitions. Second operand has 32 states, 32 states have (on average 1.71875) internal successors, (55), 31 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:07:18,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:07:18,394 INFO L93 Difference]: Finished difference Result 731 states and 869 transitions.
[2022-02-15 02:07:18,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states.
[2022-02-15 02:07:18,394 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.71875) internal successors, (55), 31 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 61
[2022-02-15 02:07:18,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:07:18,395 INFO L225 Difference]: With dead ends: 731
[2022-02-15 02:07:18,395 INFO L226 Difference]: Without dead ends: 425
[2022-02-15 02:07:18,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 12 SyntacticMatches, 13 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=198, Invalid=1134, Unknown=0, NotChecked=0, Total=1332
[2022-02-15 02:07:18,396 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 85 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 1207 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2022-02-15 02:07:18,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 40 Invalid, 1230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1207 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2022-02-15 02:07:18,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states.
[2022-02-15 02:07:18,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 391.
[2022-02-15 02:07:18,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 376 states have (on average 1.1914893617021276) internal successors, (448), 379 states have internal predecessors, (448), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:07:18,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 465 transitions.
[2022-02-15 02:07:18,733 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 465 transitions. Word has length 61
[2022-02-15 02:07:18,733 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:07:18,733 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 465 transitions.
[2022-02-15 02:07:18,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.71875) internal successors, (55), 31 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:07:18,733 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 465 transitions.
[2022-02-15 02:07:18,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62
[2022-02-15 02:07:18,734 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:07:18,734 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 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 02:07:18,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89
[2022-02-15 02:07:18,734 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:07:18,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:07:18,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1871778083, now seen corresponding path program 78 times
[2022-02-15 02:07:18,734 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:07:18,734 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [802764266]
[2022-02-15 02:07:18,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:07:18,778 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:18,778 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE
[2022-02-15 02:07:18,815 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:18,847 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:18,847 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:07:18,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:07:18,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:07:18,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:07:18,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:07:18,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:07:18,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:07:18,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:07:19,563 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:07:19,563 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [802764266]
[2022-02-15 02:07:19,563 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [802764266] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:07:19,563 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:07:19,563 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33
[2022-02-15 02:07:19,564 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573982315]
[2022-02-15 02:07:19,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:07:19,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states
[2022-02-15 02:07:19,564 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:07:19,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants.
[2022-02-15 02:07:19,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1086, Unknown=0, NotChecked=0, Total=1260
[2022-02-15 02:07:19,564 INFO L87 Difference]: Start difference. First operand 391 states and 465 transitions. Second operand has 33 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 32 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:07:20,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:07:20,441 INFO L93 Difference]: Finished difference Result 766 states and 910 transitions.
[2022-02-15 02:07:20,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states.
[2022-02-15 02:07:20,442 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 32 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 61
[2022-02-15 02:07:20,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:07:20,443 INFO L225 Difference]: With dead ends: 766
[2022-02-15 02:07:20,443 INFO L226 Difference]: Without dead ends: 449
[2022-02-15 02:07:20,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 12 SyntacticMatches, 12 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=207, Invalid=1199, Unknown=0, NotChecked=0, Total=1406
[2022-02-15 02:07:20,444 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 99 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 1180 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 1208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2022-02-15 02:07:20,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 34 Invalid, 1208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1180 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2022-02-15 02:07:20,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states.
[2022-02-15 02:07:20,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 403.
[2022-02-15 02:07:20,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 388 states have (on average 1.1958762886597938) internal successors, (464), 391 states have internal predecessors, (464), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:07:20,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 481 transitions.
[2022-02-15 02:07:20,784 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 481 transitions. Word has length 61
[2022-02-15 02:07:20,784 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:07:20,784 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 481 transitions.
[2022-02-15 02:07:20,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 32 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:07:20,784 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 481 transitions.
[2022-02-15 02:07:20,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64
[2022-02-15 02:07:20,784 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:07:20,784 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 02:07:20,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90
[2022-02-15 02:07:20,785 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:07:20,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:07:20,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1779769613, now seen corresponding path program 5 times
[2022-02-15 02:07:20,785 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:07:20,785 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [596165982]
[2022-02-15 02:07:20,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:07:20,827 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:20,857 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:20,857 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:07:20,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:07:20,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:07:20,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:07:20,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:07:20,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:07:20,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:07:20,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:07:21,044 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:07:21,044 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [596165982]
[2022-02-15 02:07:21,044 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [596165982] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:07:21,044 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:07:21,045 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17
[2022-02-15 02:07:21,045 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001471911]
[2022-02-15 02:07:21,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:07:21,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states
[2022-02-15 02:07:21,045 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:07:21,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants.
[2022-02-15 02:07:21,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272
[2022-02-15 02:07:21,045 INFO L87 Difference]: Start difference. First operand 403 states and 481 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3)
[2022-02-15 02:07:21,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:07:21,546 INFO L93 Difference]: Finished difference Result 747 states and 889 transitions.
[2022-02-15 02:07:21,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states.
[2022-02-15 02:07:21,547 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 63
[2022-02-15 02:07:21,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:07:21,548 INFO L225 Difference]: With dead ends: 747
[2022-02-15 02:07:21,548 INFO L226 Difference]: Without dead ends: 423
[2022-02-15 02:07:21,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 10 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506
[2022-02-15 02:07:21,549 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 78 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-02-15 02:07:21,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 31 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-02-15 02:07:21,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states.
[2022-02-15 02:07:21,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 415.
[2022-02-15 02:07:21,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 400 states have (on average 1.19) internal successors, (476), 403 states have internal predecessors, (476), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:07:21,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 493 transitions.
[2022-02-15 02:07:21,884 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 493 transitions. Word has length 63
[2022-02-15 02:07:21,884 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:07:21,884 INFO L470 AbstractCegarLoop]: Abstraction has 415 states and 493 transitions.
[2022-02-15 02:07:21,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3)
[2022-02-15 02:07:21,884 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 493 transitions.
[2022-02-15 02:07:21,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65
[2022-02-15 02:07:21,884 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:07:21,885 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 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 02:07:21,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91
[2022-02-15 02:07:21,885 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:07:21,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:07:21,885 INFO L85 PathProgramCache]: Analyzing trace with hash -2046600004, now seen corresponding path program 79 times
[2022-02-15 02:07:21,885 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:07:21,885 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1341622739]
[2022-02-15 02:07:21,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:07:21,932 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:21,976 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:21,976 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:07:22,023 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:22,090 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:22,090 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:07:22,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:07:22,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:07:22,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:07:22,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:07:22,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:07:22,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:07:22,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:07:22,730 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:07:22,730 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1341622739]
[2022-02-15 02:07:22,730 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1341622739] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:07:22,730 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:07:22,730 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23
[2022-02-15 02:07:22,730 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133282554]
[2022-02-15 02:07:22,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:07:22,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states
[2022-02-15 02:07:22,730 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:07:22,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants.
[2022-02-15 02:07:22,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600
[2022-02-15 02:07:22,731 INFO L87 Difference]: Start difference. First operand 415 states and 493 transitions. Second operand has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:07:23,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:07:23,911 INFO L93 Difference]: Finished difference Result 859 states and 1004 transitions.
[2022-02-15 02:07:23,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states.
[2022-02-15 02:07:23,911 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 64
[2022-02-15 02:07:23,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:07:23,912 INFO L225 Difference]: With dead ends: 859
[2022-02-15 02:07:23,912 INFO L226 Difference]: Without dead ends: 535
[2022-02-15 02:07:23,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 12 SyntacticMatches, 25 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756
[2022-02-15 02:07:23,913 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 49 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 1482 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 1495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time
[2022-02-15 02:07:23,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 57 Invalid, 1495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1482 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time]
[2022-02-15 02:07:23,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states.
[2022-02-15 02:07:24,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 424.
[2022-02-15 02:07:24,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 409 states have (on average 1.1858190709046454) internal successors, (485), 412 states have internal predecessors, (485), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:07:24,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 502 transitions.
[2022-02-15 02:07:24,298 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 502 transitions. Word has length 64
[2022-02-15 02:07:24,298 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:07:24,298 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 502 transitions.
[2022-02-15 02:07:24,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:07:24,299 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 502 transitions.
[2022-02-15 02:07:24,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65
[2022-02-15 02:07:24,299 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:07:24,299 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 12, 2, 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 02:07:24,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92
[2022-02-15 02:07:24,299 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:07:24,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:07:24,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1895278910, now seen corresponding path program 80 times
[2022-02-15 02:07:24,299 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:07:24,299 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2118963477]
[2022-02-15 02:07:24,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:07:24,347 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:24,392 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:24,392 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:07:24,439 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:24,482 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:24,482 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:07:24,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:07:24,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:07:24,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:07:24,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:07:24,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:07:24,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:07:24,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:07:25,188 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:07:25,188 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2118963477]
[2022-02-15 02:07:25,188 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2118963477] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:07:25,188 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:07:25,188 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24
[2022-02-15 02:07:25,188 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623705935]
[2022-02-15 02:07:25,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:07:25,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states
[2022-02-15 02:07:25,188 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:07:25,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants.
[2022-02-15 02:07:25,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702
[2022-02-15 02:07:25,189 INFO L87 Difference]: Start difference. First operand 424 states and 502 transitions. Second operand has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 23 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:07:26,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:07:26,334 INFO L93 Difference]: Finished difference Result 868 states and 1009 transitions.
[2022-02-15 02:07:26,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states.
[2022-02-15 02:07:26,334 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 23 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 64
[2022-02-15 02:07:26,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:07:26,335 INFO L225 Difference]: With dead ends: 868
[2022-02-15 02:07:26,335 INFO L226 Difference]: Without dead ends: 535
[2022-02-15 02:07:26,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 12 SyntacticMatches, 24 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812
[2022-02-15 02:07:26,336 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 43 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 1237 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 1251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2022-02-15 02:07:26,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 57 Invalid, 1251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1237 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2022-02-15 02:07:26,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states.
[2022-02-15 02:07:26,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 424.
[2022-02-15 02:07:26,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 409 states have (on average 1.1858190709046454) internal successors, (485), 412 states have internal predecessors, (485), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:07:26,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 502 transitions.
[2022-02-15 02:07:26,741 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 502 transitions. Word has length 64
[2022-02-15 02:07:26,741 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:07:26,741 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 502 transitions.
[2022-02-15 02:07:26,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 23 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:07:26,741 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 502 transitions.
[2022-02-15 02:07:26,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65
[2022-02-15 02:07:26,742 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:07:26,742 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 11, 3, 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 02:07:26,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93
[2022-02-15 02:07:26,742 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:07:26,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:07:26,742 INFO L85 PathProgramCache]: Analyzing trace with hash -154108932, now seen corresponding path program 81 times
[2022-02-15 02:07:26,742 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:07:26,742 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1295209]
[2022-02-15 02:07:26,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:07:26,777 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:26,823 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:26,823 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:07:26,857 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:26,890 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:26,890 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:07:26,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:07:26,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:07:26,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:07:26,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:07:26,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:07:26,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:07:26,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:07:27,541 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:07:27,541 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1295209]
[2022-02-15 02:07:27,541 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1295209] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:07:27,541 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:07:27,541 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25
[2022-02-15 02:07:27,541 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046135122]
[2022-02-15 02:07:27,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:07:27,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states
[2022-02-15 02:07:27,542 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:07:27,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants.
[2022-02-15 02:07:27,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702
[2022-02-15 02:07:27,542 INFO L87 Difference]: Start difference. First operand 424 states and 502 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:07:28,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:07:28,780 INFO L93 Difference]: Finished difference Result 868 states and 1013 transitions.
[2022-02-15 02:07:28,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states.
[2022-02-15 02:07:28,780 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 64
[2022-02-15 02:07:28,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:07:28,781 INFO L225 Difference]: With dead ends: 868
[2022-02-15 02:07:28,781 INFO L226 Difference]: Without dead ends: 535
[2022-02-15 02:07:28,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 12 SyntacticMatches, 23 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870
[2022-02-15 02:07:28,782 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 57 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 1430 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time
[2022-02-15 02:07:28,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 50 Invalid, 1445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1430 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time]
[2022-02-15 02:07:28,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states.
[2022-02-15 02:07:29,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 424.
[2022-02-15 02:07:29,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 409 states have (on average 1.1858190709046454) internal successors, (485), 412 states have internal predecessors, (485), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:07:29,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 502 transitions.
[2022-02-15 02:07:29,260 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 502 transitions. Word has length 64
[2022-02-15 02:07:29,260 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:07:29,260 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 502 transitions.
[2022-02-15 02:07:29,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:07:29,260 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 502 transitions.
[2022-02-15 02:07:29,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65
[2022-02-15 02:07:29,261 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:07:29,261 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 10, 4, 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 02:07:29,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94
[2022-02-15 02:07:29,261 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:07:29,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:07:29,261 INFO L85 PathProgramCache]: Analyzing trace with hash 269537790, now seen corresponding path program 82 times
[2022-02-15 02:07:29,261 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:07:29,261 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [373365605]
[2022-02-15 02:07:29,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:07:29,309 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:29,353 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:29,353 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:07:29,388 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:29,432 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:29,433 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:07:29,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:07:29,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:07:29,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:07:29,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:07:29,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:07:29,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:07:29,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:07:30,072 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:07:30,072 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [373365605]
[2022-02-15 02:07:30,072 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [373365605] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:07:30,072 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:07:30,072 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26
[2022-02-15 02:07:30,072 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125957651]
[2022-02-15 02:07:30,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:07:30,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states
[2022-02-15 02:07:30,072 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:07:30,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants.
[2022-02-15 02:07:30,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756
[2022-02-15 02:07:30,073 INFO L87 Difference]: Start difference. First operand 424 states and 502 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:07:31,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:07:31,335 INFO L93 Difference]: Finished difference Result 859 states and 1004 transitions.
[2022-02-15 02:07:31,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states.
[2022-02-15 02:07:31,335 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 64
[2022-02-15 02:07:31,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:07:31,336 INFO L225 Difference]: With dead ends: 859
[2022-02-15 02:07:31,336 INFO L226 Difference]: Without dead ends: 526
[2022-02-15 02:07:31,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 12 SyntacticMatches, 22 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930
[2022-02-15 02:07:31,337 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 57 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 1558 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 1574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time
[2022-02-15 02:07:31,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 57 Invalid, 1574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1558 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time]
[2022-02-15 02:07:31,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states.
[2022-02-15 02:07:31,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 424.
[2022-02-15 02:07:31,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 409 states have (on average 1.1858190709046454) internal successors, (485), 412 states have internal predecessors, (485), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:07:31,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 502 transitions.
[2022-02-15 02:07:31,771 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 502 transitions. Word has length 64
[2022-02-15 02:07:31,771 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:07:31,771 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 502 transitions.
[2022-02-15 02:07:31,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:07:31,771 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 502 transitions.
[2022-02-15 02:07:31,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65
[2022-02-15 02:07:31,771 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:07:31,771 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 9, 5, 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 02:07:31,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95
[2022-02-15 02:07:31,772 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:07:31,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:07:31,772 INFO L85 PathProgramCache]: Analyzing trace with hash -759821508, now seen corresponding path program 83 times
[2022-02-15 02:07:31,772 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:07:31,772 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [750908772]
[2022-02-15 02:07:31,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:07:31,808 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:31,855 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:31,855 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:07:31,902 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:31,946 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:31,947 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:07:31,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:07:31,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:07:31,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:07:31,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:07:32,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:07:32,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:07:32,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:07:32,632 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:07:32,632 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [750908772]
[2022-02-15 02:07:32,632 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [750908772] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:07:32,632 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:07:32,632 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27
[2022-02-15 02:07:32,632 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46694056]
[2022-02-15 02:07:32,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:07:32,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states
[2022-02-15 02:07:32,632 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:07:32,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants.
[2022-02-15 02:07:32,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812
[2022-02-15 02:07:32,633 INFO L87 Difference]: Start difference. First operand 424 states and 502 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 26 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:07:33,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:07:33,904 INFO L93 Difference]: Finished difference Result 850 states and 995 transitions.
[2022-02-15 02:07:33,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states.
[2022-02-15 02:07:33,904 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 26 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 64
[2022-02-15 02:07:33,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:07:33,905 INFO L225 Difference]: With dead ends: 850
[2022-02-15 02:07:33,905 INFO L226 Difference]: Without dead ends: 517
[2022-02-15 02:07:33,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 12 SyntacticMatches, 21 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=141, Invalid=851, Unknown=0, NotChecked=0, Total=992
[2022-02-15 02:07:33,906 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 67 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 1678 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time
[2022-02-15 02:07:33,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 48 Invalid, 1695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1678 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time]
[2022-02-15 02:07:33,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states.
[2022-02-15 02:07:34,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 424.
[2022-02-15 02:07:34,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 409 states have (on average 1.1858190709046454) internal successors, (485), 412 states have internal predecessors, (485), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:07:34,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 502 transitions.
[2022-02-15 02:07:34,354 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 502 transitions. Word has length 64
[2022-02-15 02:07:34,354 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:07:34,354 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 502 transitions.
[2022-02-15 02:07:34,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 26 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:07:34,355 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 502 transitions.
[2022-02-15 02:07:34,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65
[2022-02-15 02:07:34,355 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:07:34,355 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 8, 6, 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 02:07:34,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96
[2022-02-15 02:07:34,355 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:07:34,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:07:34,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1603827010, now seen corresponding path program 84 times
[2022-02-15 02:07:34,355 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:07:34,355 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [914420178]
[2022-02-15 02:07:34,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:07:34,391 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:34,434 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:34,435 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:07:34,481 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:34,523 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:34,523 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:07:34,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:07:34,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:07:34,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:07:34,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:07:34,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:07:34,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:07:34,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:07:35,209 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:07:35,209 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [914420178]
[2022-02-15 02:07:35,209 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [914420178] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:07:35,209 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:07:35,209 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28
[2022-02-15 02:07:35,209 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643511427]
[2022-02-15 02:07:35,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:07:35,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states
[2022-02-15 02:07:35,209 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:07:35,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants.
[2022-02-15 02:07:35,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870
[2022-02-15 02:07:35,210 INFO L87 Difference]: Start difference. First operand 424 states and 502 transitions. Second operand has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:07:36,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:07:36,432 INFO L93 Difference]: Finished difference Result 841 states and 986 transitions.
[2022-02-15 02:07:36,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states.
[2022-02-15 02:07:36,433 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 64
[2022-02-15 02:07:36,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:07:36,433 INFO L225 Difference]: With dead ends: 841
[2022-02-15 02:07:36,434 INFO L226 Difference]: Without dead ends: 508
[2022-02-15 02:07:36,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 12 SyntacticMatches, 20 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056
[2022-02-15 02:07:36,434 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 64 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 1543 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time
[2022-02-15 02:07:36,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 58 Invalid, 1561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1543 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time]
[2022-02-15 02:07:36,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states.
[2022-02-15 02:07:36,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 424.
[2022-02-15 02:07:36,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 409 states have (on average 1.1858190709046454) internal successors, (485), 412 states have internal predecessors, (485), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:07:36,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 502 transitions.
[2022-02-15 02:07:36,912 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 502 transitions. Word has length 64
[2022-02-15 02:07:36,912 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:07:36,913 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 502 transitions.
[2022-02-15 02:07:36,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:07:36,913 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 502 transitions.
[2022-02-15 02:07:36,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65
[2022-02-15 02:07:36,913 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:07:36,913 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 7, 7, 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 02:07:36,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97
[2022-02-15 02:07:36,913 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:07:36,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:07:36,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1329067396, now seen corresponding path program 85 times
[2022-02-15 02:07:36,913 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:07:36,914 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [450477027]
[2022-02-15 02:07:36,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:07:36,949 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:36,994 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:36,994 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:07:37,028 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:37,072 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:37,073 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:07:37,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:07:37,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:07:37,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:07:37,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:07:37,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:07:37,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:07:37,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:07:37,877 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:07:37,877 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [450477027]
[2022-02-15 02:07:37,877 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [450477027] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:07:37,877 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:07:37,878 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29
[2022-02-15 02:07:37,878 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809772715]
[2022-02-15 02:07:37,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:07:37,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states
[2022-02-15 02:07:37,878 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:07:37,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants.
[2022-02-15 02:07:37,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=855, Unknown=0, NotChecked=0, Total=992
[2022-02-15 02:07:37,878 INFO L87 Difference]: Start difference. First operand 424 states and 502 transitions. Second operand has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:07:39,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:07:39,106 INFO L93 Difference]: Finished difference Result 838 states and 979 transitions.
[2022-02-15 02:07:39,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states.
[2022-02-15 02:07:39,106 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 64
[2022-02-15 02:07:39,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:07:39,107 INFO L225 Difference]: With dead ends: 838
[2022-02-15 02:07:39,107 INFO L226 Difference]: Without dead ends: 505
[2022-02-15 02:07:39,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 12 SyntacticMatches, 19 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122
[2022-02-15 02:07:39,108 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 57 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 1537 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 1558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time
[2022-02-15 02:07:39,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 59 Invalid, 1558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1537 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time]
[2022-02-15 02:07:39,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states.
[2022-02-15 02:07:39,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 424.
[2022-02-15 02:07:39,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 409 states have (on average 1.1858190709046454) internal successors, (485), 412 states have internal predecessors, (485), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:07:39,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 502 transitions.
[2022-02-15 02:07:39,542 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 502 transitions. Word has length 64
[2022-02-15 02:07:39,542 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:07:39,542 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 502 transitions.
[2022-02-15 02:07:39,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:07:39,542 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 502 transitions.
[2022-02-15 02:07:39,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65
[2022-02-15 02:07:39,543 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:07:39,543 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 8, 6, 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 02:07:39,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98
[2022-02-15 02:07:39,543 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:07:39,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:07:39,543 INFO L85 PathProgramCache]: Analyzing trace with hash 57135998, now seen corresponding path program 86 times
[2022-02-15 02:07:39,543 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:07:39,543 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [540377929]
[2022-02-15 02:07:39,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:07:39,579 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:39,623 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:39,624 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:07:39,658 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:39,700 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:39,700 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:07:39,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:07:39,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:07:39,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:07:39,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:07:39,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:07:39,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:07:39,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:07:40,404 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:07:40,404 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [540377929]
[2022-02-15 02:07:40,404 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [540377929] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:07:40,404 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:07:40,404 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30
[2022-02-15 02:07:40,404 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308880032]
[2022-02-15 02:07:40,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:07:40,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states
[2022-02-15 02:07:40,404 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:07:40,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants.
[2022-02-15 02:07:40,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=856, Unknown=0, NotChecked=0, Total=992
[2022-02-15 02:07:40,405 INFO L87 Difference]: Start difference. First operand 424 states and 502 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:07:41,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:07:41,538 INFO L93 Difference]: Finished difference Result 823 states and 968 transitions.
[2022-02-15 02:07:41,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states.
[2022-02-15 02:07:41,539 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 64
[2022-02-15 02:07:41,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:07:41,539 INFO L225 Difference]: With dead ends: 823
[2022-02-15 02:07:41,539 INFO L226 Difference]: Without dead ends: 490
[2022-02-15 02:07:41,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 12 SyntacticMatches, 18 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=171, Invalid=1019, Unknown=0, NotChecked=0, Total=1190
[2022-02-15 02:07:41,540 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 69 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 1493 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 1513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time
[2022-02-15 02:07:41,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 52 Invalid, 1513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1493 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time]
[2022-02-15 02:07:41,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states.
[2022-02-15 02:07:41,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 424.
[2022-02-15 02:07:41,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 409 states have (on average 1.1858190709046454) internal successors, (485), 412 states have internal predecessors, (485), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:07:41,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 502 transitions.
[2022-02-15 02:07:41,997 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 502 transitions. Word has length 64
[2022-02-15 02:07:41,997 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:07:41,997 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 502 transitions.
[2022-02-15 02:07:41,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:07:41,997 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 502 transitions.
[2022-02-15 02:07:41,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65
[2022-02-15 02:07:41,997 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:07:41,997 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 9, 5, 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 02:07:41,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99
[2022-02-15 02:07:41,997 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:07:41,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:07:41,998 INFO L85 PathProgramCache]: Analyzing trace with hash 119175612, now seen corresponding path program 87 times
[2022-02-15 02:07:41,998 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:07:41,998 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [988690696]
[2022-02-15 02:07:41,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:07:42,047 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:42,090 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:42,090 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:07:42,137 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:42,194 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:42,194 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:07:42,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:07:42,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:07:42,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:07:42,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:07:42,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:07:42,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:07:42,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:07:42,894 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:07:42,894 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [988690696]
[2022-02-15 02:07:42,894 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [988690696] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:07:42,894 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:07:42,894 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31
[2022-02-15 02:07:42,894 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582064992]
[2022-02-15 02:07:42,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:07:42,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states
[2022-02-15 02:07:42,895 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:07:42,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants.
[2022-02-15 02:07:42,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056
[2022-02-15 02:07:42,895 INFO L87 Difference]: Start difference. First operand 424 states and 502 transitions. Second operand has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:07:44,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:07:44,173 INFO L93 Difference]: Finished difference Result 814 states and 959 transitions.
[2022-02-15 02:07:44,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states.
[2022-02-15 02:07:44,174 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 64
[2022-02-15 02:07:44,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:07:44,174 INFO L225 Difference]: With dead ends: 814
[2022-02-15 02:07:44,174 INFO L226 Difference]: Without dead ends: 481
[2022-02-15 02:07:44,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 12 SyntacticMatches, 17 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=181, Invalid=1079, Unknown=0, NotChecked=0, Total=1260
[2022-02-15 02:07:44,175 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 78 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 2075 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 2096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 2075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time
[2022-02-15 02:07:44,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 57 Invalid, 2096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 2075 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time]
[2022-02-15 02:07:44,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states.
[2022-02-15 02:07:44,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 424.
[2022-02-15 02:07:44,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 409 states have (on average 1.1858190709046454) internal successors, (485), 412 states have internal predecessors, (485), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:07:44,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 502 transitions.
[2022-02-15 02:07:44,613 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 502 transitions. Word has length 64
[2022-02-15 02:07:44,613 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:07:44,613 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 502 transitions.
[2022-02-15 02:07:44,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:07:44,613 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 502 transitions.
[2022-02-15 02:07:44,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65
[2022-02-15 02:07:44,613 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:07:44,613 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 10, 4, 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 02:07:44,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100
[2022-02-15 02:07:44,613 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:07:44,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:07:44,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1686262722, now seen corresponding path program 88 times
[2022-02-15 02:07:44,614 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:07:44,614 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1004965963]
[2022-02-15 02:07:44,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:07:44,649 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:44,691 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:44,691 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:07:44,725 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:44,772 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:44,772 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:07:44,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:07:44,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:07:44,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:07:44,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:07:44,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:07:44,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:07:44,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:07:45,482 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:07:45,482 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1004965963]
[2022-02-15 02:07:45,482 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1004965963] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:07:45,482 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:07:45,482 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32
[2022-02-15 02:07:45,482 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079622162]
[2022-02-15 02:07:45,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:07:45,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states
[2022-02-15 02:07:45,483 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:07:45,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants.
[2022-02-15 02:07:45,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=970, Unknown=0, NotChecked=0, Total=1122
[2022-02-15 02:07:45,483 INFO L87 Difference]: Start difference. First operand 424 states and 502 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:07:46,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:07:46,706 INFO L93 Difference]: Finished difference Result 805 states and 950 transitions.
[2022-02-15 02:07:46,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states.
[2022-02-15 02:07:46,706 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 64
[2022-02-15 02:07:46,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:07:46,707 INFO L225 Difference]: With dead ends: 805
[2022-02-15 02:07:46,707 INFO L226 Difference]: Without dead ends: 472
[2022-02-15 02:07:46,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 12 SyntacticMatches, 16 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=191, Invalid=1141, Unknown=0, NotChecked=0, Total=1332
[2022-02-15 02:07:46,708 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 77 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1697 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 1719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time
[2022-02-15 02:07:46,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 56 Invalid, 1719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1697 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time]
[2022-02-15 02:07:46,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states.
[2022-02-15 02:07:47,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 424.
[2022-02-15 02:07:47,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 409 states have (on average 1.1858190709046454) internal successors, (485), 412 states have internal predecessors, (485), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:07:47,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 502 transitions.
[2022-02-15 02:07:47,150 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 502 transitions. Word has length 64
[2022-02-15 02:07:47,150 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:07:47,150 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 502 transitions.
[2022-02-15 02:07:47,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:07:47,151 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 502 transitions.
[2022-02-15 02:07:47,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65
[2022-02-15 02:07:47,151 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:07:47,151 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 11, 3, 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 02:07:47,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101
[2022-02-15 02:07:47,151 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:07:47,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:07:47,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1791056124, now seen corresponding path program 89 times
[2022-02-15 02:07:47,151 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:07:47,151 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1837206288]
[2022-02-15 02:07:47,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:07:47,201 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:47,234 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:47,234 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:07:47,280 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:47,322 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:47,322 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:07:47,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:07:47,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:07:47,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:07:47,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:07:47,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:07:47,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:07:47,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:07:48,080 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:07:48,081 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1837206288]
[2022-02-15 02:07:48,081 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1837206288] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:07:48,081 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:07:48,081 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33
[2022-02-15 02:07:48,081 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383403324]
[2022-02-15 02:07:48,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:07:48,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states
[2022-02-15 02:07:48,082 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:07:48,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants.
[2022-02-15 02:07:48,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1030, Unknown=0, NotChecked=0, Total=1190
[2022-02-15 02:07:48,082 INFO L87 Difference]: Start difference. First operand 424 states and 502 transitions. Second operand has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:07:49,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:07:49,078 INFO L93 Difference]: Finished difference Result 796 states and 941 transitions.
[2022-02-15 02:07:49,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states.
[2022-02-15 02:07:49,078 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 64
[2022-02-15 02:07:49,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:07:49,079 INFO L225 Difference]: With dead ends: 796
[2022-02-15 02:07:49,079 INFO L226 Difference]: Without dead ends: 463
[2022-02-15 02:07:49,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 12 SyntacticMatches, 15 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=201, Invalid=1205, Unknown=0, NotChecked=0, Total=1406
[2022-02-15 02:07:49,079 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 80 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 1321 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2022-02-15 02:07:49,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 43 Invalid, 1344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1321 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2022-02-15 02:07:49,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states.
[2022-02-15 02:07:49,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 424.
[2022-02-15 02:07:49,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 409 states have (on average 1.1858190709046454) internal successors, (485), 412 states have internal predecessors, (485), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:07:49,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 502 transitions.
[2022-02-15 02:07:49,521 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 502 transitions. Word has length 64
[2022-02-15 02:07:49,521 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:07:49,521 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 502 transitions.
[2022-02-15 02:07:49,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:07:49,521 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 502 transitions.
[2022-02-15 02:07:49,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65
[2022-02-15 02:07:49,521 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:07:49,522 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 12, 2, 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 02:07:49,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102
[2022-02-15 02:07:49,522 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:07:49,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:07:49,522 INFO L85 PathProgramCache]: Analyzing trace with hash 202708222, now seen corresponding path program 90 times
[2022-02-15 02:07:49,522 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:07:49,522 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2011038025]
[2022-02-15 02:07:49,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:07:49,558 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:49,601 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:49,601 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:07:49,647 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:49,679 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:49,680 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:07:49,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:07:49,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:07:49,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:07:49,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:07:49,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:07:49,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:07:49,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:07:50,412 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:07:50,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2011038025]
[2022-02-15 02:07:50,412 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2011038025] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:07:50,412 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:07:50,412 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34
[2022-02-15 02:07:50,413 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373999521]
[2022-02-15 02:07:50,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:07:50,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states
[2022-02-15 02:07:50,413 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:07:50,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants.
[2022-02-15 02:07:50,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1092, Unknown=0, NotChecked=0, Total=1260
[2022-02-15 02:07:50,413 INFO L87 Difference]: Start difference. First operand 424 states and 502 transitions. Second operand has 34 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 33 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:07:51,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:07:51,606 INFO L93 Difference]: Finished difference Result 791 states and 936 transitions.
[2022-02-15 02:07:51,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states.
[2022-02-15 02:07:51,607 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 33 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 64
[2022-02-15 02:07:51,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:07:51,607 INFO L225 Difference]: With dead ends: 791
[2022-02-15 02:07:51,607 INFO L226 Difference]: Without dead ends: 458
[2022-02-15 02:07:51,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 12 SyntacticMatches, 14 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=211, Invalid=1271, Unknown=0, NotChecked=0, Total=1482
[2022-02-15 02:07:51,609 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 87 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1865 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 1889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time
[2022-02-15 02:07:51,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 56 Invalid, 1889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1865 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time]
[2022-02-15 02:07:51,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states.
[2022-02-15 02:07:52,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 424.
[2022-02-15 02:07:52,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 409 states have (on average 1.1858190709046454) internal successors, (485), 412 states have internal predecessors, (485), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:07:52,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 502 transitions.
[2022-02-15 02:07:52,046 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 502 transitions. Word has length 64
[2022-02-15 02:07:52,046 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:07:52,046 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 502 transitions.
[2022-02-15 02:07:52,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 33 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:07:52,046 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 502 transitions.
[2022-02-15 02:07:52,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65
[2022-02-15 02:07:52,046 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:07:52,046 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 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 02:07:52,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103
[2022-02-15 02:07:52,046 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:07:52,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:07:52,047 INFO L85 PathProgramCache]: Analyzing trace with hash -808409028, now seen corresponding path program 91 times
[2022-02-15 02:07:52,047 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:07:52,047 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [377210712]
[2022-02-15 02:07:52,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:07:52,093 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:52,093 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE
[2022-02-15 02:07:52,127 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:52,170 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:52,171 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:07:52,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:07:52,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:07:52,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:07:52,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:07:52,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:07:52,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:07:52,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:07:52,919 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:07:52,919 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [377210712]
[2022-02-15 02:07:52,919 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [377210712] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:07:52,919 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:07:52,919 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35
[2022-02-15 02:07:52,919 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781063682]
[2022-02-15 02:07:52,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:07:52,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states
[2022-02-15 02:07:52,919 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:07:52,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants.
[2022-02-15 02:07:52,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1156, Unknown=0, NotChecked=0, Total=1332
[2022-02-15 02:07:52,920 INFO L87 Difference]: Start difference. First operand 424 states and 502 transitions. Second operand has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 34 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:07:53,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:07:53,995 INFO L93 Difference]: Finished difference Result 805 states and 960 transitions.
[2022-02-15 02:07:53,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states.
[2022-02-15 02:07:53,995 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 34 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 64
[2022-02-15 02:07:53,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:07:53,996 INFO L225 Difference]: With dead ends: 805
[2022-02-15 02:07:53,996 INFO L226 Difference]: Without dead ends: 461
[2022-02-15 02:07:53,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 12 SyntacticMatches, 13 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=221, Invalid=1339, Unknown=0, NotChecked=0, Total=1560
[2022-02-15 02:07:53,996 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 94 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 1727 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 1753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time
[2022-02-15 02:07:53,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 47 Invalid, 1753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1727 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time]
[2022-02-15 02:07:53,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states.
[2022-02-15 02:07:54,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 436.
[2022-02-15 02:07:54,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 421 states have (on average 1.190023752969121) internal successors, (501), 424 states have internal predecessors, (501), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:07:54,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 518 transitions.
[2022-02-15 02:07:54,437 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 518 transitions. Word has length 64
[2022-02-15 02:07:54,437 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:07:54,437 INFO L470 AbstractCegarLoop]: Abstraction has 436 states and 518 transitions.
[2022-02-15 02:07:54,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 34 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:07:54,437 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 518 transitions.
[2022-02-15 02:07:54,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68
[2022-02-15 02:07:54,438 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:07:54,438 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 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 02:07:54,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104
[2022-02-15 02:07:54,438 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:07:54,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:07:54,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1878189759, now seen corresponding path program 92 times
[2022-02-15 02:07:54,438 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:07:54,438 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [41186248]
[2022-02-15 02:07:54,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:07:54,504 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:54,559 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:54,559 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:07:54,597 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:54,641 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:54,641 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:07:54,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:07:54,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:07:54,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:07:54,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:07:54,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:07:54,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:07:54,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:07:55,342 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:07:55,343 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [41186248]
[2022-02-15 02:07:55,343 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [41186248] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:07:55,343 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:07:55,343 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24
[2022-02-15 02:07:55,343 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000865555]
[2022-02-15 02:07:55,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:07:55,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states
[2022-02-15 02:07:55,343 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:07:55,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants.
[2022-02-15 02:07:55,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702
[2022-02-15 02:07:55,344 INFO L87 Difference]: Start difference. First operand 436 states and 518 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:07:56,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:07:56,680 INFO L93 Difference]: Finished difference Result 898 states and 1046 transitions.
[2022-02-15 02:07:56,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states.
[2022-02-15 02:07:56,681 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 67
[2022-02-15 02:07:56,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:07:56,682 INFO L225 Difference]: With dead ends: 898
[2022-02-15 02:07:56,682 INFO L226 Difference]: Without dead ends: 556
[2022-02-15 02:07:56,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 12 SyntacticMatches, 27 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812
[2022-02-15 02:07:56,682 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 44 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 1380 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2022-02-15 02:07:56,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 45 Invalid, 1396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1380 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2022-02-15 02:07:56,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states.
[2022-02-15 02:07:57,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 445.
[2022-02-15 02:07:57,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 430 states have (on average 1.186046511627907) internal successors, (510), 433 states have internal predecessors, (510), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:07:57,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 527 transitions.
[2022-02-15 02:07:57,178 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 527 transitions. Word has length 67
[2022-02-15 02:07:57,178 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:07:57,178 INFO L470 AbstractCegarLoop]: Abstraction has 445 states and 527 transitions.
[2022-02-15 02:07:57,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:07:57,178 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 527 transitions.
[2022-02-15 02:07:57,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68
[2022-02-15 02:07:57,179 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:07:57,179 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 13, 2, 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 02:07:57,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105
[2022-02-15 02:07:57,179 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:07:57,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:07:57,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1397109501, now seen corresponding path program 93 times
[2022-02-15 02:07:57,179 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:07:57,179 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [260417042]
[2022-02-15 02:07:57,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:07:57,216 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:57,269 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:57,269 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:07:57,311 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:57,344 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:07:57,344 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:07:57,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:07:57,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:07:57,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:07:57,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:07:57,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:07:57,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:07:57,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:07:58,049 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:07:58,049 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [260417042]
[2022-02-15 02:07:58,049 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [260417042] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:07:58,049 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:07:58,049 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25
[2022-02-15 02:07:58,050 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519910840]
[2022-02-15 02:07:58,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:07:58,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states
[2022-02-15 02:07:58,050 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:07:58,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants.
[2022-02-15 02:07:58,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702
[2022-02-15 02:07:58,050 INFO L87 Difference]: Start difference. First operand 445 states and 527 transitions. Second operand has 25 states, 25 states have (on average 2.44) internal successors, (61), 24 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:07:59,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:07:59,563 INFO L93 Difference]: Finished difference Result 925 states and 1077 transitions.
[2022-02-15 02:07:59,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states.
[2022-02-15 02:07:59,563 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 24 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 67
[2022-02-15 02:07:59,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:07:59,564 INFO L225 Difference]: With dead ends: 925
[2022-02-15 02:07:59,564 INFO L226 Difference]: Without dead ends: 574
[2022-02-15 02:07:59,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 12 SyntacticMatches, 26 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870
[2022-02-15 02:07:59,565 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 53 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 1573 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 1587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time
[2022-02-15 02:07:59,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 59 Invalid, 1587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1573 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time]
[2022-02-15 02:07:59,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states.
[2022-02-15 02:08:00,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 445.
[2022-02-15 02:08:00,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 430 states have (on average 1.186046511627907) internal successors, (510), 433 states have internal predecessors, (510), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:08:00,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 527 transitions.
[2022-02-15 02:08:00,093 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 527 transitions. Word has length 67
[2022-02-15 02:08:00,093 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:08:00,093 INFO L470 AbstractCegarLoop]: Abstraction has 445 states and 527 transitions.
[2022-02-15 02:08:00,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 24 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:08:00,093 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 527 transitions.
[2022-02-15 02:08:00,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68
[2022-02-15 02:08:00,094 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:08:00,094 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 12, 3, 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 02:08:00,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106
[2022-02-15 02:08:00,094 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:08:00,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:08:00,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1044021119, now seen corresponding path program 94 times
[2022-02-15 02:08:00,094 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:08:00,094 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1227965795]
[2022-02-15 02:08:00,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:08:00,146 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:08:00,189 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:08:00,189 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:08:00,236 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:08:00,279 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:08:00,279 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:08:00,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:08:00,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:08:00,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:08:00,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:08:00,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:08:00,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:08:00,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:08:00,976 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:08:00,976 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1227965795]
[2022-02-15 02:08:00,976 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1227965795] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:08:00,976 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:08:00,976 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26
[2022-02-15 02:08:00,976 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116114207]
[2022-02-15 02:08:00,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:08:00,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states
[2022-02-15 02:08:00,977 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:08:00,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants.
[2022-02-15 02:08:00,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756
[2022-02-15 02:08:00,977 INFO L87 Difference]: Start difference. First operand 445 states and 527 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:08:02,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:08:02,566 INFO L93 Difference]: Finished difference Result 916 states and 1068 transitions.
[2022-02-15 02:08:02,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states.
[2022-02-15 02:08:02,566 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 67
[2022-02-15 02:08:02,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:08:02,567 INFO L225 Difference]: With dead ends: 916
[2022-02-15 02:08:02,567 INFO L226 Difference]: Without dead ends: 565
[2022-02-15 02:08:02,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 12 SyntacticMatches, 25 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930
[2022-02-15 02:08:02,567 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 59 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 1678 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time
[2022-02-15 02:08:02,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 50 Invalid, 1693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1678 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time]
[2022-02-15 02:08:02,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states.
[2022-02-15 02:08:03,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 445.
[2022-02-15 02:08:03,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 430 states have (on average 1.186046511627907) internal successors, (510), 433 states have internal predecessors, (510), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:08:03,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 527 transitions.
[2022-02-15 02:08:03,104 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 527 transitions. Word has length 67
[2022-02-15 02:08:03,104 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:08:03,104 INFO L470 AbstractCegarLoop]: Abstraction has 445 states and 527 transitions.
[2022-02-15 02:08:03,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:08:03,104 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 527 transitions.
[2022-02-15 02:08:03,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68
[2022-02-15 02:08:03,104 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:08:03,104 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 11, 4, 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 02:08:03,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107
[2022-02-15 02:08:03,105 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:08:03,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:08:03,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1005366723, now seen corresponding path program 95 times
[2022-02-15 02:08:03,105 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:08:03,105 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2108191748]
[2022-02-15 02:08:03,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:08:03,140 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:08:03,183 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:08:03,183 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:08:03,217 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:08:03,262 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:08:03,263 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:08:03,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:08:03,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:08:03,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:08:03,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:08:03,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:08:03,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:08:03,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:08:03,973 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:08:03,973 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2108191748]
[2022-02-15 02:08:03,974 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2108191748] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:08:03,974 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:08:03,974 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27
[2022-02-15 02:08:03,974 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683818623]
[2022-02-15 02:08:03,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:08:03,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states
[2022-02-15 02:08:03,974 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:08:03,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants.
[2022-02-15 02:08:03,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=754, Unknown=0, NotChecked=0, Total=870
[2022-02-15 02:08:03,975 INFO L87 Difference]: Start difference. First operand 445 states and 527 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:08:05,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:08:05,533 INFO L93 Difference]: Finished difference Result 904 states and 1052 transitions.
[2022-02-15 02:08:05,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states.
[2022-02-15 02:08:05,537 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 67
[2022-02-15 02:08:05,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:08:05,538 INFO L225 Difference]: With dead ends: 904
[2022-02-15 02:08:05,538 INFO L226 Difference]: Without dead ends: 553
[2022-02-15 02:08:05,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 12 SyntacticMatches, 24 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=133, Invalid=859, Unknown=0, NotChecked=0, Total=992
[2022-02-15 02:08:05,539 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 52 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1570 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time
[2022-02-15 02:08:05,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 50 Invalid, 1589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1570 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time]
[2022-02-15 02:08:05,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states.
[2022-02-15 02:08:06,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 445.
[2022-02-15 02:08:06,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 430 states have (on average 1.186046511627907) internal successors, (510), 433 states have internal predecessors, (510), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:08:06,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 527 transitions.
[2022-02-15 02:08:06,091 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 527 transitions. Word has length 67
[2022-02-15 02:08:06,091 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:08:06,091 INFO L470 AbstractCegarLoop]: Abstraction has 445 states and 527 transitions.
[2022-02-15 02:08:06,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:08:06,091 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 527 transitions.
[2022-02-15 02:08:06,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68
[2022-02-15 02:08:06,091 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:08:06,092 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 10, 5, 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 02:08:06,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108
[2022-02-15 02:08:06,092 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:08:06,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:08:06,092 INFO L85 PathProgramCache]: Analyzing trace with hash -581720001, now seen corresponding path program 96 times
[2022-02-15 02:08:06,092 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:08:06,092 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [620852391]
[2022-02-15 02:08:06,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:08:06,140 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:08:06,184 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:08:06,184 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:08:06,230 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:08:06,263 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:08:06,263 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:08:06,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:08:06,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:08:06,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:08:06,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:08:06,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:08:06,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:08:06,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:08:07,083 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:08:07,083 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [620852391]
[2022-02-15 02:08:07,083 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [620852391] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:08:07,083 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:08:07,083 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28
[2022-02-15 02:08:07,083 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326856695]
[2022-02-15 02:08:07,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:08:07,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states
[2022-02-15 02:08:07,084 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:08:07,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants.
[2022-02-15 02:08:07,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870
[2022-02-15 02:08:07,084 INFO L87 Difference]: Start difference. First operand 445 states and 527 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:08:08,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:08:08,580 INFO L93 Difference]: Finished difference Result 898 states and 1050 transitions.
[2022-02-15 02:08:08,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states.
[2022-02-15 02:08:08,581 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 67
[2022-02-15 02:08:08,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:08:08,581 INFO L225 Difference]: With dead ends: 898
[2022-02-15 02:08:08,582 INFO L226 Difference]: Without dead ends: 547
[2022-02-15 02:08:08,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 12 SyntacticMatches, 23 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056
[2022-02-15 02:08:08,582 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 69 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 1586 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 1603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time
[2022-02-15 02:08:08,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 52 Invalid, 1603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1586 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time]
[2022-02-15 02:08:08,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states.
[2022-02-15 02:08:09,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 445.
[2022-02-15 02:08:09,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 430 states have (on average 1.186046511627907) internal successors, (510), 433 states have internal predecessors, (510), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:08:09,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 527 transitions.
[2022-02-15 02:08:09,133 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 527 transitions. Word has length 67
[2022-02-15 02:08:09,133 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:08:09,133 INFO L470 AbstractCegarLoop]: Abstraction has 445 states and 527 transitions.
[2022-02-15 02:08:09,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:08:09,133 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 527 transitions.
[2022-02-15 02:08:09,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68
[2022-02-15 02:08:09,134 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:08:09,134 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 9, 6, 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 02:08:09,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109
[2022-02-15 02:08:09,134 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:08:09,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:08:09,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1611079299, now seen corresponding path program 97 times
[2022-02-15 02:08:09,134 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:08:09,134 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [669939131]
[2022-02-15 02:08:09,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:08:09,184 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:08:09,216 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:08:09,216 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:08:09,263 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:08:09,306 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:08:09,306 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:08:09,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:08:09,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:08:09,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:08:09,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:08:09,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:08:09,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:08:09,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:08:10,365 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:08:10,365 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [669939131]
[2022-02-15 02:08:10,365 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [669939131] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:08:10,365 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:08:10,365 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33
[2022-02-15 02:08:10,365 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609868802]
[2022-02-15 02:08:10,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:08:10,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states
[2022-02-15 02:08:10,366 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:08:10,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants.
[2022-02-15 02:08:10,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1085, Unknown=0, NotChecked=0, Total=1260
[2022-02-15 02:08:10,366 INFO L87 Difference]: Start difference. First operand 445 states and 527 transitions. Second operand has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 31 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:08:11,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:08:11,866 INFO L93 Difference]: Finished difference Result 873 states and 1021 transitions.
[2022-02-15 02:08:11,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states.
[2022-02-15 02:08:11,866 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 31 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 67
[2022-02-15 02:08:11,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:08:11,867 INFO L225 Difference]: With dead ends: 873
[2022-02-15 02:08:11,867 INFO L226 Difference]: Without dead ends: 522
[2022-02-15 02:08:11,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 6 SyntacticMatches, 22 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=221, Invalid=1339, Unknown=0, NotChecked=0, Total=1560
[2022-02-15 02:08:11,868 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 67 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 1677 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 1698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time
[2022-02-15 02:08:11,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 65 Invalid, 1698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1677 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time]
[2022-02-15 02:08:11,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states.
[2022-02-15 02:08:12,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 445.
[2022-02-15 02:08:12,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 430 states have (on average 1.186046511627907) internal successors, (510), 433 states have internal predecessors, (510), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:08:12,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 527 transitions.
[2022-02-15 02:08:12,425 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 527 transitions. Word has length 67
[2022-02-15 02:08:12,425 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:08:12,425 INFO L470 AbstractCegarLoop]: Abstraction has 445 states and 527 transitions.
[2022-02-15 02:08:12,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 31 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:08:12,425 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 527 transitions.
[2022-02-15 02:08:12,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68
[2022-02-15 02:08:12,426 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:08:12,426 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 8, 7, 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 02:08:12,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110
[2022-02-15 02:08:12,426 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:08:12,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:08:12,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1839882495, now seen corresponding path program 98 times
[2022-02-15 02:08:12,426 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:08:12,426 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [459399806]
[2022-02-15 02:08:12,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:08:12,462 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:08:12,510 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:08:12,510 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:08:12,545 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:08:12,578 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:08:12,578 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:08:12,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:08:12,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:08:12,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:08:12,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:08:12,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:08:12,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:08:12,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:08:13,322 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:08:13,323 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [459399806]
[2022-02-15 02:08:13,323 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [459399806] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:08:13,323 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:08:13,323 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30
[2022-02-15 02:08:13,323 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264252158]
[2022-02-15 02:08:13,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:08:13,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states
[2022-02-15 02:08:13,323 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:08:13,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants.
[2022-02-15 02:08:13,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=861, Unknown=0, NotChecked=0, Total=992
[2022-02-15 02:08:13,324 INFO L87 Difference]: Start difference. First operand 445 states and 527 transitions. Second operand has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:08:14,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:08:14,802 INFO L93 Difference]: Finished difference Result 880 states and 1032 transitions.
[2022-02-15 02:08:14,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states.
[2022-02-15 02:08:14,802 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 67
[2022-02-15 02:08:14,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:08:14,803 INFO L225 Difference]: With dead ends: 880
[2022-02-15 02:08:14,803 INFO L226 Difference]: Without dead ends: 529
[2022-02-15 02:08:14,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 12 SyntacticMatches, 21 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=164, Invalid=1026, Unknown=0, NotChecked=0, Total=1190
[2022-02-15 02:08:14,804 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 68 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 1887 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time
[2022-02-15 02:08:14,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 55 Invalid, 1906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1887 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time]
[2022-02-15 02:08:14,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states.
[2022-02-15 02:08:15,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 445.
[2022-02-15 02:08:15,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 430 states have (on average 1.186046511627907) internal successors, (510), 433 states have internal predecessors, (510), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:08:15,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 527 transitions.
[2022-02-15 02:08:15,361 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 527 transitions. Word has length 67
[2022-02-15 02:08:15,361 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:08:15,361 INFO L470 AbstractCegarLoop]: Abstraction has 445 states and 527 transitions.
[2022-02-15 02:08:15,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:08:15,361 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 527 transitions.
[2022-02-15 02:08:15,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68
[2022-02-15 02:08:15,361 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:08:15,362 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 8, 7, 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 02:08:15,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111
[2022-02-15 02:08:15,362 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:08:15,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:08:15,362 INFO L85 PathProgramCache]: Analyzing trace with hash 2114642109, now seen corresponding path program 99 times
[2022-02-15 02:08:15,362 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:08:15,362 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2044173612]
[2022-02-15 02:08:15,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:08:15,415 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:08:15,459 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:08:15,460 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:08:15,506 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:08:15,547 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:08:15,548 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:08:15,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:08:15,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:08:15,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:08:15,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:08:15,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:08:15,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:08:15,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:08:16,311 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:08:16,312 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2044173612]
[2022-02-15 02:08:16,312 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2044173612] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:08:16,312 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:08:16,312 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31
[2022-02-15 02:08:16,312 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097470920]
[2022-02-15 02:08:16,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:08:16,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states
[2022-02-15 02:08:16,312 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:08:16,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants.
[2022-02-15 02:08:16,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=917, Unknown=0, NotChecked=0, Total=1056
[2022-02-15 02:08:16,313 INFO L87 Difference]: Start difference. First operand 445 states and 527 transitions. Second operand has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:08:17,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:08:17,626 INFO L93 Difference]: Finished difference Result 871 states and 1023 transitions.
[2022-02-15 02:08:17,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states.
[2022-02-15 02:08:17,627 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 67
[2022-02-15 02:08:17,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:08:17,628 INFO L225 Difference]: With dead ends: 871
[2022-02-15 02:08:17,628 INFO L226 Difference]: Without dead ends: 520
[2022-02-15 02:08:17,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 12 SyntacticMatches, 20 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=174, Invalid=1086, Unknown=0, NotChecked=0, Total=1260
[2022-02-15 02:08:17,628 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 73 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 1465 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 1485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time
[2022-02-15 02:08:17,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 49 Invalid, 1485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1465 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time]
[2022-02-15 02:08:17,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states.
[2022-02-15 02:08:18,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 445.
[2022-02-15 02:08:18,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 430 states have (on average 1.186046511627907) internal successors, (510), 433 states have internal predecessors, (510), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:08:18,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 527 transitions.
[2022-02-15 02:08:18,198 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 527 transitions. Word has length 67
[2022-02-15 02:08:18,198 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:08:18,198 INFO L470 AbstractCegarLoop]: Abstraction has 445 states and 527 transitions.
[2022-02-15 02:08:18,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:08:18,198 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 527 transitions.
[2022-02-15 02:08:18,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68
[2022-02-15 02:08:18,198 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:08:18,198 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 9, 6, 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 02:08:18,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112
[2022-02-15 02:08:18,198 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:08:18,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:08:18,198 INFO L85 PathProgramCache]: Analyzing trace with hash -794121793, now seen corresponding path program 100 times
[2022-02-15 02:08:18,199 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:08:18,199 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [812077592]
[2022-02-15 02:08:18,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:08:18,235 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:08:18,278 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:08:18,278 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:08:18,315 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:08:18,348 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:08:18,348 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:08:18,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:08:18,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:08:18,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:08:18,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:08:18,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:08:18,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:08:18,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:08:19,164 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:08:19,164 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [812077592]
[2022-02-15 02:08:19,164 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [812077592] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:08:19,164 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:08:19,164 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32
[2022-02-15 02:08:19,164 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773972333]
[2022-02-15 02:08:19,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:08:19,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states
[2022-02-15 02:08:19,164 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:08:19,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants.
[2022-02-15 02:08:19,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=975, Unknown=0, NotChecked=0, Total=1122
[2022-02-15 02:08:19,165 INFO L87 Difference]: Start difference. First operand 445 states and 527 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:08:20,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:08:20,468 INFO L93 Difference]: Finished difference Result 862 states and 1014 transitions.
[2022-02-15 02:08:20,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states.
[2022-02-15 02:08:20,469 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 67
[2022-02-15 02:08:20,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:08:20,470 INFO L225 Difference]: With dead ends: 862
[2022-02-15 02:08:20,470 INFO L226 Difference]: Without dead ends: 511
[2022-02-15 02:08:20,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 12 SyntacticMatches, 19 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 739 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=184, Invalid=1148, Unknown=0, NotChecked=0, Total=1332
[2022-02-15 02:08:20,471 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 79 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1600 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time
[2022-02-15 02:08:20,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 46 Invalid, 1621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1600 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time]
[2022-02-15 02:08:20,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states.
[2022-02-15 02:08:21,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 445.
[2022-02-15 02:08:21,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 430 states have (on average 1.186046511627907) internal successors, (510), 433 states have internal predecessors, (510), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:08:21,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 527 transitions.
[2022-02-15 02:08:21,038 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 527 transitions. Word has length 67
[2022-02-15 02:08:21,038 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:08:21,038 INFO L470 AbstractCegarLoop]: Abstraction has 445 states and 527 transitions.
[2022-02-15 02:08:21,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:08:21,038 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 527 transitions.
[2022-02-15 02:08:21,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68
[2022-02-15 02:08:21,038 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:08:21,038 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 10, 5, 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 02:08:21,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113
[2022-02-15 02:08:21,038 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:08:21,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:08:21,039 INFO L85 PathProgramCache]: Analyzing trace with hash -732082179, now seen corresponding path program 101 times
[2022-02-15 02:08:21,039 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:08:21,039 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1713618130]
[2022-02-15 02:08:21,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:08:21,074 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:08:21,117 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:08:21,118 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:08:21,152 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:08:21,194 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:08:21,194 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:08:21,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:08:21,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:08:21,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:08:21,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:08:21,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:08:21,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:08:21,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:08:21,948 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:08:21,948 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1713618130]
[2022-02-15 02:08:21,948 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1713618130] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:08:21,948 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:08:21,948 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33
[2022-02-15 02:08:21,948 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727001545]
[2022-02-15 02:08:21,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:08:21,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states
[2022-02-15 02:08:21,948 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:08:21,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants.
[2022-02-15 02:08:21,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1035, Unknown=0, NotChecked=0, Total=1190
[2022-02-15 02:08:21,949 INFO L87 Difference]: Start difference. First operand 445 states and 527 transitions. Second operand has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:08:23,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:08:23,238 INFO L93 Difference]: Finished difference Result 853 states and 1005 transitions.
[2022-02-15 02:08:23,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states.
[2022-02-15 02:08:23,238 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 67
[2022-02-15 02:08:23,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:08:23,239 INFO L225 Difference]: With dead ends: 853
[2022-02-15 02:08:23,239 INFO L226 Difference]: Without dead ends: 502
[2022-02-15 02:08:23,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 12 SyntacticMatches, 18 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=194, Invalid=1212, Unknown=0, NotChecked=0, Total=1406
[2022-02-15 02:08:23,240 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 76 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 1653 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 1675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time
[2022-02-15 02:08:23,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 52 Invalid, 1675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1653 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time]
[2022-02-15 02:08:23,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states.
[2022-02-15 02:08:23,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 445.
[2022-02-15 02:08:23,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 430 states have (on average 1.186046511627907) internal successors, (510), 433 states have internal predecessors, (510), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:08:23,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 527 transitions.
[2022-02-15 02:08:23,804 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 527 transitions. Word has length 67
[2022-02-15 02:08:23,804 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:08:23,804 INFO L470 AbstractCegarLoop]: Abstraction has 445 states and 527 transitions.
[2022-02-15 02:08:23,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:08:23,805 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 527 transitions.
[2022-02-15 02:08:23,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68
[2022-02-15 02:08:23,805 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:08:23,805 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 11, 4, 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 02:08:23,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114
[2022-02-15 02:08:23,805 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:08:23,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:08:23,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1757446783, now seen corresponding path program 102 times
[2022-02-15 02:08:23,805 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:08:23,805 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [297649361]
[2022-02-15 02:08:23,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:08:23,853 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:08:23,885 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:08:23,885 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:08:23,933 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:08:23,975 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:08:23,976 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:08:23,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:08:23,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:08:24,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:08:24,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:08:24,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:08:24,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:08:24,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:08:24,741 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:08:24,742 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [297649361]
[2022-02-15 02:08:24,742 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [297649361] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:08:24,742 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:08:24,742 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34
[2022-02-15 02:08:24,742 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217655730]
[2022-02-15 02:08:24,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:08:24,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states
[2022-02-15 02:08:24,742 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:08:24,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants.
[2022-02-15 02:08:24,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1161, Unknown=0, NotChecked=0, Total=1332
[2022-02-15 02:08:24,742 INFO L87 Difference]: Start difference. First operand 445 states and 527 transitions. Second operand has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 33 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:08:26,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:08:26,203 INFO L93 Difference]: Finished difference Result 863 states and 1011 transitions.
[2022-02-15 02:08:26,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states.
[2022-02-15 02:08:26,203 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 33 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 67
[2022-02-15 02:08:26,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:08:26,204 INFO L225 Difference]: With dead ends: 863
[2022-02-15 02:08:26,204 INFO L226 Difference]: Without dead ends: 512
[2022-02-15 02:08:26,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 13 SyntacticMatches, 17 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 731 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=175, Invalid=1231, Unknown=0, NotChecked=0, Total=1406
[2022-02-15 02:08:26,204 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 83 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 1918 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 1941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time
[2022-02-15 02:08:26,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 56 Invalid, 1941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1918 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time]
[2022-02-15 02:08:26,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states.
[2022-02-15 02:08:26,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 445.
[2022-02-15 02:08:26,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 430 states have (on average 1.186046511627907) internal successors, (510), 433 states have internal predecessors, (510), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:08:26,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 527 transitions.
[2022-02-15 02:08:26,773 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 527 transitions. Word has length 67
[2022-02-15 02:08:26,773 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:08:26,773 INFO L470 AbstractCegarLoop]: Abstraction has 445 states and 527 transitions.
[2022-02-15 02:08:26,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 33 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:08:26,774 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 527 transitions.
[2022-02-15 02:08:26,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68
[2022-02-15 02:08:26,774 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:08:26,774 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 12, 3, 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 02:08:26,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115
[2022-02-15 02:08:26,774 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:08:26,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:08:26,774 INFO L85 PathProgramCache]: Analyzing trace with hash 939798333, now seen corresponding path program 103 times
[2022-02-15 02:08:26,774 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:08:26,774 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1714192724]
[2022-02-15 02:08:26,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:08:26,810 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:08:26,852 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:08:26,852 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:08:26,899 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:08:26,941 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:08:26,941 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:08:26,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:08:26,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:08:26,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:08:26,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:08:26,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:08:26,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:08:26,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:08:27,800 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:08:27,800 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1714192724]
[2022-02-15 02:08:27,800 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1714192724] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:08:27,800 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:08:27,800 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35
[2022-02-15 02:08:27,800 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015259694]
[2022-02-15 02:08:27,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:08:27,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states
[2022-02-15 02:08:27,801 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:08:27,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants.
[2022-02-15 02:08:27,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1161, Unknown=0, NotChecked=0, Total=1332
[2022-02-15 02:08:27,801 INFO L87 Difference]: Start difference. First operand 445 states and 527 transitions. Second operand has 35 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 34 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:08:29,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:08:29,050 INFO L93 Difference]: Finished difference Result 835 states and 987 transitions.
[2022-02-15 02:08:29,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states.
[2022-02-15 02:08:29,050 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 34 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 67
[2022-02-15 02:08:29,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:08:29,051 INFO L225 Difference]: With dead ends: 835
[2022-02-15 02:08:29,051 INFO L226 Difference]: Without dead ends: 484
[2022-02-15 02:08:29,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 12 SyntacticMatches, 16 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=214, Invalid=1346, Unknown=0, NotChecked=0, Total=1560
[2022-02-15 02:08:29,052 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 93 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 1671 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time
[2022-02-15 02:08:29,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 43 Invalid, 1695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1671 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time]
[2022-02-15 02:08:29,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states.
[2022-02-15 02:08:29,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 445.
[2022-02-15 02:08:29,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 430 states have (on average 1.186046511627907) internal successors, (510), 433 states have internal predecessors, (510), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:08:29,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 527 transitions.
[2022-02-15 02:08:29,631 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 527 transitions. Word has length 67
[2022-02-15 02:08:29,631 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:08:29,631 INFO L470 AbstractCegarLoop]: Abstraction has 445 states and 527 transitions.
[2022-02-15 02:08:29,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 34 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:08:29,631 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 527 transitions.
[2022-02-15 02:08:29,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68
[2022-02-15 02:08:29,631 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:08:29,631 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 13, 2, 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 02:08:29,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116
[2022-02-15 02:08:29,632 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:08:29,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:08:29,632 INFO L85 PathProgramCache]: Analyzing trace with hash -648549569, now seen corresponding path program 104 times
[2022-02-15 02:08:29,632 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:08:29,632 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1369904169]
[2022-02-15 02:08:29,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:08:29,667 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:08:29,710 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:08:29,710 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:08:29,745 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:08:29,787 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:08:29,788 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:08:29,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:08:29,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:08:29,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:08:29,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:08:29,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:08:29,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:08:29,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:08:30,582 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:08:30,582 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1369904169]
[2022-02-15 02:08:30,582 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1369904169] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:08:30,582 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:08:30,583 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36
[2022-02-15 02:08:30,583 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580439148]
[2022-02-15 02:08:30,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:08:30,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states
[2022-02-15 02:08:30,583 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:08:30,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants.
[2022-02-15 02:08:30,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1227, Unknown=0, NotChecked=0, Total=1406
[2022-02-15 02:08:30,583 INFO L87 Difference]: Start difference. First operand 445 states and 527 transitions. Second operand has 36 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 35 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:08:32,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:08:32,058 INFO L93 Difference]: Finished difference Result 830 states and 982 transitions.
[2022-02-15 02:08:32,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states.
[2022-02-15 02:08:32,058 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 35 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 67
[2022-02-15 02:08:32,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:08:32,059 INFO L225 Difference]: With dead ends: 830
[2022-02-15 02:08:32,059 INFO L226 Difference]: Without dead ends: 479
[2022-02-15 02:08:32,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 12 SyntacticMatches, 15 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=224, Invalid=1416, Unknown=0, NotChecked=0, Total=1640
[2022-02-15 02:08:32,060 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 84 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 2515 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 2540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 2515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time
[2022-02-15 02:08:32,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 62 Invalid, 2540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 2515 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time]
[2022-02-15 02:08:32,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states.
[2022-02-15 02:08:32,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 445.
[2022-02-15 02:08:32,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 430 states have (on average 1.186046511627907) internal successors, (510), 433 states have internal predecessors, (510), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:08:32,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 527 transitions.
[2022-02-15 02:08:32,623 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 527 transitions. Word has length 67
[2022-02-15 02:08:32,623 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:08:32,623 INFO L470 AbstractCegarLoop]: Abstraction has 445 states and 527 transitions.
[2022-02-15 02:08:32,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 35 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:08:32,623 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 527 transitions.
[2022-02-15 02:08:32,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68
[2022-02-15 02:08:32,624 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:08:32,624 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 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 02:08:32,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117
[2022-02-15 02:08:32,624 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:08:32,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:08:32,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1659666819, now seen corresponding path program 105 times
[2022-02-15 02:08:32,624 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:08:32,624 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1389152841]
[2022-02-15 02:08:32,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:08:32,667 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:08:32,667 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE
[2022-02-15 02:08:32,714 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:08:32,755 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:08:32,756 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:08:32,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:08:32,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:08:32,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:08:32,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:08:32,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:08:32,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:08:32,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:08:33,581 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:08:33,582 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1389152841]
[2022-02-15 02:08:33,582 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1389152841] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:08:33,582 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:08:33,582 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37
[2022-02-15 02:08:33,582 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264991683]
[2022-02-15 02:08:33,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:08:33,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states
[2022-02-15 02:08:33,582 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:08:33,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants.
[2022-02-15 02:08:33,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1295, Unknown=0, NotChecked=0, Total=1482
[2022-02-15 02:08:33,583 INFO L87 Difference]: Start difference. First operand 445 states and 527 transitions. Second operand has 37 states, 37 states have (on average 1.6486486486486487) internal successors, (61), 36 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:08:34,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:08:34,856 INFO L93 Difference]: Finished difference Result 844 states and 1006 transitions.
[2022-02-15 02:08:34,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states.
[2022-02-15 02:08:34,857 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.6486486486486487) internal successors, (61), 36 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 67
[2022-02-15 02:08:34,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:08:34,858 INFO L225 Difference]: With dead ends: 844
[2022-02-15 02:08:34,858 INFO L226 Difference]: Without dead ends: 482
[2022-02-15 02:08:34,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 12 SyntacticMatches, 14 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=234, Invalid=1488, Unknown=0, NotChecked=0, Total=1722
[2022-02-15 02:08:34,858 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 95 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 1940 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1940 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time
[2022-02-15 02:08:34,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 48 Invalid, 1967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1940 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time]
[2022-02-15 02:08:34,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states.
[2022-02-15 02:08:35,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 457.
[2022-02-15 02:08:35,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 442 states have (on average 1.1900452488687783) internal successors, (526), 445 states have internal predecessors, (526), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:08:35,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 543 transitions.
[2022-02-15 02:08:35,433 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 543 transitions. Word has length 67
[2022-02-15 02:08:35,433 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:08:35,433 INFO L470 AbstractCegarLoop]: Abstraction has 457 states and 543 transitions.
[2022-02-15 02:08:35,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.6486486486486487) internal successors, (61), 36 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:08:35,433 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 543 transitions.
[2022-02-15 02:08:35,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70
[2022-02-15 02:08:35,433 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:08:35,433 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 02:08:35,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118
[2022-02-15 02:08:35,434 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:08:35,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:08:35,434 INFO L85 PathProgramCache]: Analyzing trace with hash 420722915, now seen corresponding path program 6 times
[2022-02-15 02:08:35,434 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:08:35,434 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1765800096]
[2022-02-15 02:08:35,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:08:35,450 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:08:35,488 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:08:35,488 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:08:35,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:08:35,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:08:35,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:08:35,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:08:35,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:08:35,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:08:35,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:08:35,750 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:08:35,750 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1765800096]
[2022-02-15 02:08:35,750 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1765800096] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:08:35,750 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:08:35,750 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19
[2022-02-15 02:08:35,750 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229825719]
[2022-02-15 02:08:35,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:08:35,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states
[2022-02-15 02:08:35,750 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:08:35,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants.
[2022-02-15 02:08:35,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342
[2022-02-15 02:08:35,751 INFO L87 Difference]: Start difference. First operand 457 states and 543 transitions. Second operand has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 states have internal predecessors, (56), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3)
[2022-02-15 02:08:36,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:08:36,560 INFO L93 Difference]: Finished difference Result 849 states and 1005 transitions.
[2022-02-15 02:08:36,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states.
[2022-02-15 02:08:36,560 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 states have internal predecessors, (56), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 69
[2022-02-15 02:08:36,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:08:36,561 INFO L225 Difference]: With dead ends: 849
[2022-02-15 02:08:36,561 INFO L226 Difference]: Without dead ends: 480
[2022-02-15 02:08:36,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 24 SyntacticMatches, 12 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=197, Invalid=453, Unknown=0, NotChecked=0, Total=650
[2022-02-15 02:08:36,562 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 85 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-02-15 02:08:36,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 34 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-02-15 02:08:36,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states.
[2022-02-15 02:08:37,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 469.
[2022-02-15 02:08:37,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 454 states have (on average 1.1850220264317182) internal successors, (538), 457 states have internal predecessors, (538), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:08:37,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 555 transitions.
[2022-02-15 02:08:37,145 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 555 transitions. Word has length 69
[2022-02-15 02:08:37,146 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:08:37,146 INFO L470 AbstractCegarLoop]: Abstraction has 469 states and 555 transitions.
[2022-02-15 02:08:37,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 states have internal predecessors, (56), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3)
[2022-02-15 02:08:37,146 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 555 transitions.
[2022-02-15 02:08:37,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71
[2022-02-15 02:08:37,146 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:08:37,146 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 15, 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 02:08:37,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119
[2022-02-15 02:08:37,146 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:08:37,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:08:37,146 INFO L85 PathProgramCache]: Analyzing trace with hash -899647012, now seen corresponding path program 106 times
[2022-02-15 02:08:37,147 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:08:37,147 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1505666632]
[2022-02-15 02:08:37,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:08:37,186 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:08:37,231 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:08:37,231 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:08:37,265 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:08:37,307 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:08:37,307 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:08:37,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:08:37,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:08:37,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:08:37,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:08:37,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:08:37,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:08:37,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:08:38,047 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:08:38,047 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1505666632]
[2022-02-15 02:08:38,047 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1505666632] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:08:38,047 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:08:38,047 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25
[2022-02-15 02:08:38,047 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877792008]
[2022-02-15 02:08:38,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:08:38,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states
[2022-02-15 02:08:38,048 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:08:38,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants.
[2022-02-15 02:08:38,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702
[2022-02-15 02:08:38,048 INFO L87 Difference]: Start difference. First operand 469 states and 555 transitions. Second operand has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:08:39,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:08:39,803 INFO L93 Difference]: Finished difference Result 976 states and 1135 transitions.
[2022-02-15 02:08:39,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states.
[2022-02-15 02:08:39,803 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 70
[2022-02-15 02:08:39,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:08:39,805 INFO L225 Difference]: With dead ends: 976
[2022-02-15 02:08:39,805 INFO L226 Difference]: Without dead ends: 607
[2022-02-15 02:08:39,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 12 SyntacticMatches, 29 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=107, Invalid=763, Unknown=0, NotChecked=0, Total=870
[2022-02-15 02:08:39,805 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 49 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 1781 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 1794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time
[2022-02-15 02:08:39,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 54 Invalid, 1794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1781 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time]
[2022-02-15 02:08:39,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states.
[2022-02-15 02:08:40,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 478.
[2022-02-15 02:08:40,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 463 states have (on average 1.181425485961123) internal successors, (547), 466 states have internal predecessors, (547), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:08:40,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 564 transitions.
[2022-02-15 02:08:40,469 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 564 transitions. Word has length 70
[2022-02-15 02:08:40,469 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:08:40,469 INFO L470 AbstractCegarLoop]: Abstraction has 478 states and 564 transitions.
[2022-02-15 02:08:40,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:08:40,469 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 564 transitions.
[2022-02-15 02:08:40,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71
[2022-02-15 02:08:40,469 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:08:40,469 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 14, 2, 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 02:08:40,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120
[2022-02-15 02:08:40,470 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:08:40,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:08:40,470 INFO L85 PathProgramCache]: Analyzing trace with hash -455746338, now seen corresponding path program 107 times
[2022-02-15 02:08:40,470 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:08:40,470 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [511278598]
[2022-02-15 02:08:40,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:08:40,523 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:08:40,557 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:08:40,558 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:08:40,595 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:08:40,637 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:08:40,638 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:08:40,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:08:40,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:08:40,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:08:40,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:08:40,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:08:40,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:08:40,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:08:41,403 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:08:41,403 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [511278598]
[2022-02-15 02:08:41,403 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [511278598] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:08:41,403 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:08:41,403 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26
[2022-02-15 02:08:41,403 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399123422]
[2022-02-15 02:08:41,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:08:41,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states
[2022-02-15 02:08:41,404 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:08:41,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants.
[2022-02-15 02:08:41,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756
[2022-02-15 02:08:41,404 INFO L87 Difference]: Start difference. First operand 478 states and 564 transitions. Second operand has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:08:43,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:08:43,246 INFO L93 Difference]: Finished difference Result 994 states and 1153 transitions.
[2022-02-15 02:08:43,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states.
[2022-02-15 02:08:43,246 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 70
[2022-02-15 02:08:43,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:08:43,247 INFO L225 Difference]: With dead ends: 994
[2022-02-15 02:08:43,247 INFO L226 Difference]: Without dead ends: 616
[2022-02-15 02:08:43,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 12 SyntacticMatches, 28 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930
[2022-02-15 02:08:43,248 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 50 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 1804 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 1818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time
[2022-02-15 02:08:43,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 67 Invalid, 1818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1804 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time]
[2022-02-15 02:08:43,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states.
[2022-02-15 02:08:43,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 478.
[2022-02-15 02:08:43,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 463 states have (on average 1.181425485961123) internal successors, (547), 466 states have internal predecessors, (547), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:08:43,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 564 transitions.
[2022-02-15 02:08:43,912 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 564 transitions. Word has length 70
[2022-02-15 02:08:43,913 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:08:43,913 INFO L470 AbstractCegarLoop]: Abstraction has 478 states and 564 transitions.
[2022-02-15 02:08:43,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:08:43,913 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 564 transitions.
[2022-02-15 02:08:43,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71
[2022-02-15 02:08:43,913 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:08:43,913 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 13, 3, 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 02:08:43,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121
[2022-02-15 02:08:43,913 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:08:43,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:08:43,913 INFO L85 PathProgramCache]: Analyzing trace with hash -936826596, now seen corresponding path program 108 times
[2022-02-15 02:08:43,913 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:08:43,914 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1319934991]
[2022-02-15 02:08:43,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:08:43,948 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:08:43,990 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:08:43,991 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:08:44,037 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:08:44,079 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:08:44,079 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:08:44,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:08:44,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:08:44,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:08:44,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:08:44,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:08:44,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:08:44,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:08:44,828 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:08:44,828 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1319934991]
[2022-02-15 02:08:44,828 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1319934991] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:08:44,828 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:08:44,828 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27
[2022-02-15 02:08:44,828 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840583133]
[2022-02-15 02:08:44,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:08:44,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states
[2022-02-15 02:08:44,828 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:08:44,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants.
[2022-02-15 02:08:44,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812
[2022-02-15 02:08:44,829 INFO L87 Difference]: Start difference. First operand 478 states and 564 transitions. Second operand has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 26 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:08:46,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:08:46,655 INFO L93 Difference]: Finished difference Result 985 states and 1144 transitions.
[2022-02-15 02:08:46,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states.
[2022-02-15 02:08:46,656 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 26 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 70
[2022-02-15 02:08:46,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:08:46,657 INFO L225 Difference]: With dead ends: 985
[2022-02-15 02:08:46,657 INFO L226 Difference]: Without dead ends: 607
[2022-02-15 02:08:46,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 12 SyntacticMatches, 27 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=127, Invalid=865, Unknown=0, NotChecked=0, Total=992
[2022-02-15 02:08:46,658 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 57 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 1689 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time
[2022-02-15 02:08:46,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 58 Invalid, 1704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1689 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time]
[2022-02-15 02:08:46,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states.
[2022-02-15 02:08:47,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 478.
[2022-02-15 02:08:47,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 463 states have (on average 1.181425485961123) internal successors, (547), 466 states have internal predecessors, (547), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:08:47,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 564 transitions.
[2022-02-15 02:08:47,359 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 564 transitions. Word has length 70
[2022-02-15 02:08:47,359 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:08:47,359 INFO L470 AbstractCegarLoop]: Abstraction has 478 states and 564 transitions.
[2022-02-15 02:08:47,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 26 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:08:47,359 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 564 transitions.
[2022-02-15 02:08:47,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71
[2022-02-15 02:08:47,360 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:08:47,360 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 12, 4, 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 02:08:47,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122
[2022-02-15 02:08:47,360 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:08:47,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:08:47,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1289914978, now seen corresponding path program 109 times
[2022-02-15 02:08:47,360 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:08:47,360 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1049808509]
[2022-02-15 02:08:47,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:08:47,408 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:08:47,450 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:08:47,450 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:08:47,484 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:08:47,526 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:08:47,526 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:08:47,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:08:47,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:08:47,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:08:47,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:08:47,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:08:47,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:08:47,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:08:48,328 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:08:48,328 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1049808509]
[2022-02-15 02:08:48,328 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1049808509] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:08:48,328 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:08:48,328 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28
[2022-02-15 02:08:48,328 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833991881]
[2022-02-15 02:08:48,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:08:48,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states
[2022-02-15 02:08:48,329 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:08:48,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants.
[2022-02-15 02:08:48,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870
[2022-02-15 02:08:48,329 INFO L87 Difference]: Start difference. First operand 478 states and 564 transitions. Second operand has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:08:50,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:08:50,176 INFO L93 Difference]: Finished difference Result 976 states and 1135 transitions.
[2022-02-15 02:08:50,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states.
[2022-02-15 02:08:50,176 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 70
[2022-02-15 02:08:50,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:08:50,177 INFO L225 Difference]: With dead ends: 976
[2022-02-15 02:08:50,177 INFO L226 Difference]: Without dead ends: 598
[2022-02-15 02:08:50,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 12 SyntacticMatches, 26 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=137, Invalid=919, Unknown=0, NotChecked=0, Total=1056
[2022-02-15 02:08:50,178 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 62 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 1827 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 1843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time
[2022-02-15 02:08:50,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 54 Invalid, 1843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1827 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time]
[2022-02-15 02:08:50,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states.
[2022-02-15 02:08:50,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 478.
[2022-02-15 02:08:50,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 463 states have (on average 1.181425485961123) internal successors, (547), 466 states have internal predecessors, (547), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:08:50,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 564 transitions.
[2022-02-15 02:08:50,883 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 564 transitions. Word has length 70
[2022-02-15 02:08:50,883 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:08:50,883 INFO L470 AbstractCegarLoop]: Abstraction has 478 states and 564 transitions.
[2022-02-15 02:08:50,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:08:50,884 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 564 transitions.
[2022-02-15 02:08:50,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71
[2022-02-15 02:08:50,884 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:08:50,884 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 11, 5, 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 02:08:50,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123
[2022-02-15 02:08:50,884 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:08:50,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:08:50,884 INFO L85 PathProgramCache]: Analyzing trace with hash 955664476, now seen corresponding path program 110 times
[2022-02-15 02:08:50,884 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:08:50,884 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [384606278]
[2022-02-15 02:08:50,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:08:50,936 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:08:50,973 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:08:50,973 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:08:51,019 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:08:51,051 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:08:51,051 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:08:51,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:08:51,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:08:51,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:08:51,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:08:51,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:08:51,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:08:51,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:08:51,827 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:08:51,827 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [384606278]
[2022-02-15 02:08:51,827 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [384606278] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:08:51,827 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:08:51,827 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29
[2022-02-15 02:08:51,828 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26125334]
[2022-02-15 02:08:51,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:08:51,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states
[2022-02-15 02:08:51,828 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:08:51,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants.
[2022-02-15 02:08:51,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930
[2022-02-15 02:08:51,828 INFO L87 Difference]: Start difference. First operand 478 states and 564 transitions. Second operand has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:08:53,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:08:53,716 INFO L93 Difference]: Finished difference Result 967 states and 1126 transitions.
[2022-02-15 02:08:53,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states.
[2022-02-15 02:08:53,716 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 70
[2022-02-15 02:08:53,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:08:53,717 INFO L225 Difference]: With dead ends: 967
[2022-02-15 02:08:53,717 INFO L226 Difference]: Without dead ends: 589
[2022-02-15 02:08:53,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 12 SyntacticMatches, 25 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=147, Invalid=975, Unknown=0, NotChecked=0, Total=1122
[2022-02-15 02:08:53,718 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 58 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 1988 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 2005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time
[2022-02-15 02:08:53,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 64 Invalid, 2005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1988 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time]
[2022-02-15 02:08:53,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states.
[2022-02-15 02:08:54,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 478.
[2022-02-15 02:08:54,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 463 states have (on average 1.181425485961123) internal successors, (547), 466 states have internal predecessors, (547), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:08:54,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 564 transitions.
[2022-02-15 02:08:54,625 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 564 transitions. Word has length 70
[2022-02-15 02:08:54,625 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:08:54,625 INFO L470 AbstractCegarLoop]: Abstraction has 478 states and 564 transitions.
[2022-02-15 02:08:54,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:08:54,625 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 564 transitions.
[2022-02-15 02:08:54,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71
[2022-02-15 02:08:54,625 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:08:54,625 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 10, 6, 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 02:08:54,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124
[2022-02-15 02:08:54,626 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:08:54,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:08:54,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1379311198, now seen corresponding path program 111 times
[2022-02-15 02:08:54,626 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:08:54,626 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1020078174]
[2022-02-15 02:08:54,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:08:54,673 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:08:54,715 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:08:54,716 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:08:54,762 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:08:54,805 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:08:54,805 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:08:54,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:08:54,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:08:54,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:08:54,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:08:54,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:08:54,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:08:54,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:08:55,588 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:08:55,588 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1020078174]
[2022-02-15 02:08:55,588 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1020078174] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:08:55,588 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:08:55,588 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30
[2022-02-15 02:08:55,588 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331582399]
[2022-02-15 02:08:55,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:08:55,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states
[2022-02-15 02:08:55,588 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:08:55,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants.
[2022-02-15 02:08:55,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992
[2022-02-15 02:08:55,589 INFO L87 Difference]: Start difference. First operand 478 states and 564 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:08:57,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:08:57,474 INFO L93 Difference]: Finished difference Result 984 states and 1146 transitions.
[2022-02-15 02:08:57,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states.
[2022-02-15 02:08:57,475 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 70
[2022-02-15 02:08:57,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:08:57,476 INFO L225 Difference]: With dead ends: 984
[2022-02-15 02:08:57,476 INFO L226 Difference]: Without dead ends: 606
[2022-02-15 02:08:57,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 12 SyntacticMatches, 24 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=157, Invalid=1033, Unknown=0, NotChecked=0, Total=1190
[2022-02-15 02:08:57,476 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 64 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 1882 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 1901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time
[2022-02-15 02:08:57,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 63 Invalid, 1901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1882 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time]
[2022-02-15 02:08:57,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states.
[2022-02-15 02:08:58,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 478.
[2022-02-15 02:08:58,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 463 states have (on average 1.181425485961123) internal successors, (547), 466 states have internal predecessors, (547), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:08:58,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 564 transitions.
[2022-02-15 02:08:58,210 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 564 transitions. Word has length 70
[2022-02-15 02:08:58,210 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:08:58,210 INFO L470 AbstractCegarLoop]: Abstraction has 478 states and 564 transitions.
[2022-02-15 02:08:58,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:08:58,211 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 564 transitions.
[2022-02-15 02:08:58,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71
[2022-02-15 02:08:58,211 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:08:58,211 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 9, 7, 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 02:08:58,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125
[2022-02-15 02:08:58,211 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:08:58,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:08:58,211 INFO L85 PathProgramCache]: Analyzing trace with hash 349951900, now seen corresponding path program 112 times
[2022-02-15 02:08:58,211 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:08:58,211 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1129906708]
[2022-02-15 02:08:58,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:08:58,252 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:08:58,285 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:08:58,285 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:08:58,335 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:08:58,378 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:08:58,378 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:08:58,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:08:58,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:08:58,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:08:58,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:08:58,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:08:58,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:08:58,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:08:59,154 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:08:59,154 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1129906708]
[2022-02-15 02:08:59,154 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1129906708] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:08:59,154 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:08:59,154 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31
[2022-02-15 02:08:59,154 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248278710]
[2022-02-15 02:08:59,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:08:59,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states
[2022-02-15 02:08:59,154 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:08:59,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants.
[2022-02-15 02:08:59,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=922, Unknown=0, NotChecked=0, Total=1056
[2022-02-15 02:08:59,155 INFO L87 Difference]: Start difference. First operand 478 states and 564 transitions. Second operand has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:09:00,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:09:00,991 INFO L93 Difference]: Finished difference Result 949 states and 1108 transitions.
[2022-02-15 02:09:00,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states.
[2022-02-15 02:09:00,992 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 70
[2022-02-15 02:09:00,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:09:00,992 INFO L225 Difference]: With dead ends: 949
[2022-02-15 02:09:00,992 INFO L226 Difference]: Without dead ends: 571
[2022-02-15 02:09:00,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 12 SyntacticMatches, 23 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=167, Invalid=1093, Unknown=0, NotChecked=0, Total=1260
[2022-02-15 02:09:00,993 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 66 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 2072 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 2091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 2072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time
[2022-02-15 02:09:00,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 66 Invalid, 2091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 2072 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time]
[2022-02-15 02:09:00,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states.
[2022-02-15 02:09:01,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 478.
[2022-02-15 02:09:01,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 463 states have (on average 1.181425485961123) internal successors, (547), 466 states have internal predecessors, (547), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:09:01,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 564 transitions.
[2022-02-15 02:09:01,728 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 564 transitions. Word has length 70
[2022-02-15 02:09:01,728 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:09:01,728 INFO L470 AbstractCegarLoop]: Abstraction has 478 states and 564 transitions.
[2022-02-15 02:09:01,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:09:01,728 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 564 transitions.
[2022-02-15 02:09:01,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71
[2022-02-15 02:09:01,729 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:09:01,729 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 8, 8, 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 02:09:01,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126
[2022-02-15 02:09:01,729 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:09:01,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:09:01,729 INFO L85 PathProgramCache]: Analyzing trace with hash -494053602, now seen corresponding path program 113 times
[2022-02-15 02:09:01,730 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:09:01,730 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [577287139]
[2022-02-15 02:09:01,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:09:01,770 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:09:01,813 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:09:01,813 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:09:01,847 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:09:01,889 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:09:01,889 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:09:01,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:09:01,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:09:01,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:09:01,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:09:01,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:09:01,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:09:01,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:09:02,700 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:09:02,700 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [577287139]
[2022-02-15 02:09:02,701 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [577287139] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:09:02,701 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:09:02,701 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32
[2022-02-15 02:09:02,701 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87116028]
[2022-02-15 02:09:02,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:09:02,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states
[2022-02-15 02:09:02,701 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:09:02,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants.
[2022-02-15 02:09:02,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1040, Unknown=0, NotChecked=0, Total=1190
[2022-02-15 02:09:02,702 INFO L87 Difference]: Start difference. First operand 478 states and 564 transitions. Second operand has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:09:04,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:09:04,552 INFO L93 Difference]: Finished difference Result 949 states and 1104 transitions.
[2022-02-15 02:09:04,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states.
[2022-02-15 02:09:04,553 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 70
[2022-02-15 02:09:04,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:09:04,554 INFO L225 Difference]: With dead ends: 949
[2022-02-15 02:09:04,554 INFO L226 Difference]: Without dead ends: 571
[2022-02-15 02:09:04,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 13 SyntacticMatches, 22 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=154, Invalid=1106, Unknown=0, NotChecked=0, Total=1260
[2022-02-15 02:09:04,555 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 75 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 2049 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 2068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 2049 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time
[2022-02-15 02:09:04,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 48 Invalid, 2068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 2049 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time]
[2022-02-15 02:09:04,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states.
[2022-02-15 02:09:05,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 478.
[2022-02-15 02:09:05,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 463 states have (on average 1.181425485961123) internal successors, (547), 466 states have internal predecessors, (547), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:09:05,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 564 transitions.
[2022-02-15 02:09:05,312 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 564 transitions. Word has length 70
[2022-02-15 02:09:05,312 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:09:05,312 INFO L470 AbstractCegarLoop]: Abstraction has 478 states and 564 transitions.
[2022-02-15 02:09:05,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:09:05,312 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 564 transitions.
[2022-02-15 02:09:05,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71
[2022-02-15 02:09:05,313 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:09:05,313 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 9, 7, 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 02:09:05,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127
[2022-02-15 02:09:05,313 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:09:05,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:09:05,313 INFO L85 PathProgramCache]: Analyzing trace with hash -219293988, now seen corresponding path program 114 times
[2022-02-15 02:09:05,313 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:09:05,313 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2047602161]
[2022-02-15 02:09:05,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:09:05,371 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:09:05,409 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:09:05,410 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:09:05,444 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:09:05,478 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:09:05,478 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:09:05,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:09:05,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:09:05,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:09:05,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:09:05,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:09:05,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:09:05,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:09:06,272 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:09:06,272 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2047602161]
[2022-02-15 02:09:06,273 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2047602161] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:09:06,273 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:09:06,273 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33
[2022-02-15 02:09:06,273 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413873189]
[2022-02-15 02:09:06,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:09:06,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states
[2022-02-15 02:09:06,273 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:09:06,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants.
[2022-02-15 02:09:06,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1040, Unknown=0, NotChecked=0, Total=1190
[2022-02-15 02:09:06,274 INFO L87 Difference]: Start difference. First operand 478 states and 564 transitions. Second operand has 33 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 32 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:09:07,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:09:07,967 INFO L93 Difference]: Finished difference Result 931 states and 1090 transitions.
[2022-02-15 02:09:07,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states.
[2022-02-15 02:09:07,967 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 32 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 70
[2022-02-15 02:09:07,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:09:07,968 INFO L225 Difference]: With dead ends: 931
[2022-02-15 02:09:07,968 INFO L226 Difference]: Without dead ends: 553
[2022-02-15 02:09:07,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 12 SyntacticMatches, 21 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 811 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=187, Invalid=1219, Unknown=0, NotChecked=0, Total=1406
[2022-02-15 02:09:07,969 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 78 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 2019 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 2040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 2019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time
[2022-02-15 02:09:07,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 50 Invalid, 2040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 2019 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time]
[2022-02-15 02:09:07,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states.
[2022-02-15 02:09:08,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 478.
[2022-02-15 02:09:08,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 463 states have (on average 1.181425485961123) internal successors, (547), 466 states have internal predecessors, (547), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:09:08,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 564 transitions.
[2022-02-15 02:09:08,712 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 564 transitions. Word has length 70
[2022-02-15 02:09:08,712 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:09:08,712 INFO L470 AbstractCegarLoop]: Abstraction has 478 states and 564 transitions.
[2022-02-15 02:09:08,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 32 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:09:08,712 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 564 transitions.
[2022-02-15 02:09:08,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71
[2022-02-15 02:09:08,713 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:09:08,713 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 10, 6, 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 02:09:08,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128
[2022-02-15 02:09:08,713 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:09:08,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:09:08,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1166909406, now seen corresponding path program 115 times
[2022-02-15 02:09:08,713 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:09:08,713 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [911286126]
[2022-02-15 02:09:08,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:09:08,750 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:09:08,794 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:09:08,794 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:09:08,828 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:09:08,870 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:09:08,870 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:09:08,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:09:08,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:09:08,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:09:08,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:09:08,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:09:08,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:09:08,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:09:09,716 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:09:09,716 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [911286126]
[2022-02-15 02:09:09,716 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [911286126] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:09:09,716 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:09:09,716 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34
[2022-02-15 02:09:09,716 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589819670]
[2022-02-15 02:09:09,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:09:09,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states
[2022-02-15 02:09:09,716 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:09:09,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants.
[2022-02-15 02:09:09,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1102, Unknown=0, NotChecked=0, Total=1260
[2022-02-15 02:09:09,717 INFO L87 Difference]: Start difference. First operand 478 states and 564 transitions. Second operand has 34 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 33 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:09:11,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:09:11,292 INFO L93 Difference]: Finished difference Result 922 states and 1081 transitions.
[2022-02-15 02:09:11,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states.
[2022-02-15 02:09:11,293 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 33 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 70
[2022-02-15 02:09:11,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:09:11,293 INFO L225 Difference]: With dead ends: 922
[2022-02-15 02:09:11,293 INFO L226 Difference]: Without dead ends: 544
[2022-02-15 02:09:11,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 12 SyntacticMatches, 20 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=197, Invalid=1285, Unknown=0, NotChecked=0, Total=1482
[2022-02-15 02:09:11,294 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 84 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 1762 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 1784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time
[2022-02-15 02:09:11,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 47 Invalid, 1784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1762 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time]
[2022-02-15 02:09:11,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states.
[2022-02-15 02:09:12,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 478.
[2022-02-15 02:09:12,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 463 states have (on average 1.181425485961123) internal successors, (547), 466 states have internal predecessors, (547), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:09:12,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 564 transitions.
[2022-02-15 02:09:12,041 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 564 transitions. Word has length 70
[2022-02-15 02:09:12,041 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:09:12,041 INFO L470 AbstractCegarLoop]: Abstraction has 478 states and 564 transitions.
[2022-02-15 02:09:12,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 33 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:09:12,042 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 564 transitions.
[2022-02-15 02:09:12,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71
[2022-02-15 02:09:12,042 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:09:12,042 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 11, 5, 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 02:09:12,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129
[2022-02-15 02:09:12,042 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:09:12,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:09:12,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1228949020, now seen corresponding path program 116 times
[2022-02-15 02:09:12,042 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:09:12,042 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [243621294]
[2022-02-15 02:09:12,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:09:12,089 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:09:12,133 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:09:12,133 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:09:12,180 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:09:12,223 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:09:12,224 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:09:12,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:09:12,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:09:12,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:09:12,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:09:12,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:09:12,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:09:12,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:09:13,067 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:09:13,067 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [243621294]
[2022-02-15 02:09:13,067 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [243621294] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:09:13,067 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:09:13,068 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35
[2022-02-15 02:09:13,068 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245730564]
[2022-02-15 02:09:13,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:09:13,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states
[2022-02-15 02:09:13,068 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:09:13,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants.
[2022-02-15 02:09:13,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1166, Unknown=0, NotChecked=0, Total=1332
[2022-02-15 02:09:13,068 INFO L87 Difference]: Start difference. First operand 478 states and 564 transitions. Second operand has 35 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 34 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:09:14,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:09:14,862 INFO L93 Difference]: Finished difference Result 913 states and 1072 transitions.
[2022-02-15 02:09:14,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states.
[2022-02-15 02:09:14,862 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 34 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 70
[2022-02-15 02:09:14,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:09:14,863 INFO L225 Difference]: With dead ends: 913
[2022-02-15 02:09:14,863 INFO L226 Difference]: Without dead ends: 535
[2022-02-15 02:09:14,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 12 SyntacticMatches, 19 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=207, Invalid=1353, Unknown=0, NotChecked=0, Total=1560
[2022-02-15 02:09:14,864 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 79 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 2640 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 2663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 2640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time
[2022-02-15 02:09:14,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 62 Invalid, 2663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 2640 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time]
[2022-02-15 02:09:14,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states.
[2022-02-15 02:09:15,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 478.
[2022-02-15 02:09:15,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 463 states have (on average 1.181425485961123) internal successors, (547), 466 states have internal predecessors, (547), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:09:15,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 564 transitions.
[2022-02-15 02:09:15,681 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 564 transitions. Word has length 70
[2022-02-15 02:09:15,681 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:09:15,681 INFO L470 AbstractCegarLoop]: Abstraction has 478 states and 564 transitions.
[2022-02-15 02:09:15,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 34 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:09:15,682 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 564 transitions.
[2022-02-15 02:09:15,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71
[2022-02-15 02:09:15,682 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:09:15,682 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 12, 4, 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 02:09:15,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130
[2022-02-15 02:09:15,682 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:09:15,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:09:15,682 INFO L85 PathProgramCache]: Analyzing trace with hash -576489314, now seen corresponding path program 117 times
[2022-02-15 02:09:15,682 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:09:15,682 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1464107162]
[2022-02-15 02:09:15,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:09:15,744 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:09:15,781 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:09:15,782 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:09:15,822 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:09:15,854 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:09:15,854 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:09:15,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:09:15,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:09:15,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:09:15,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:09:15,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:09:15,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:09:15,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:09:16,707 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:09:16,707 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1464107162]
[2022-02-15 02:09:16,707 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1464107162] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:09:16,707 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:09:16,707 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36
[2022-02-15 02:09:16,707 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672952462]
[2022-02-15 02:09:16,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:09:16,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states
[2022-02-15 02:09:16,708 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:09:16,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants.
[2022-02-15 02:09:16,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1232, Unknown=0, NotChecked=0, Total=1406
[2022-02-15 02:09:16,708 INFO L87 Difference]: Start difference. First operand 478 states and 564 transitions. Second operand has 36 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 35 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:09:18,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:09:18,188 INFO L93 Difference]: Finished difference Result 904 states and 1063 transitions.
[2022-02-15 02:09:18,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states.
[2022-02-15 02:09:18,188 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 35 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 70
[2022-02-15 02:09:18,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:09:18,189 INFO L225 Difference]: With dead ends: 904
[2022-02-15 02:09:18,189 INFO L226 Difference]: Without dead ends: 526
[2022-02-15 02:09:18,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 12 SyntacticMatches, 18 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=217, Invalid=1423, Unknown=0, NotChecked=0, Total=1640
[2022-02-15 02:09:18,190 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 82 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 1743 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time
[2022-02-15 02:09:18,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 44 Invalid, 1767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1743 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time]
[2022-02-15 02:09:18,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states.
[2022-02-15 02:09:19,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 478.
[2022-02-15 02:09:19,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 463 states have (on average 1.181425485961123) internal successors, (547), 466 states have internal predecessors, (547), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:09:19,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 564 transitions.
[2022-02-15 02:09:19,063 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 564 transitions. Word has length 70
[2022-02-15 02:09:19,063 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:09:19,063 INFO L470 AbstractCegarLoop]: Abstraction has 478 states and 564 transitions.
[2022-02-15 02:09:19,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 35 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:09:19,063 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 564 transitions.
[2022-02-15 02:09:19,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71
[2022-02-15 02:09:19,064 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:09:19,064 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 13, 3, 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 02:09:19,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131
[2022-02-15 02:09:19,064 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:09:19,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:09:19,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1394137764, now seen corresponding path program 118 times
[2022-02-15 02:09:19,064 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:09:19,064 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1894367324]
[2022-02-15 02:09:19,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:09:19,111 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:09:19,155 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:09:19,155 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:09:19,201 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:09:19,246 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:09:19,246 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:09:19,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:09:19,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:09:19,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:09:19,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:09:19,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:09:19,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:09:19,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:09:20,102 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:09:20,103 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1894367324]
[2022-02-15 02:09:20,103 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1894367324] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:09:20,103 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:09:20,103 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37
[2022-02-15 02:09:20,103 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371825211]
[2022-02-15 02:09:20,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:09:20,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states
[2022-02-15 02:09:20,103 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:09:20,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants.
[2022-02-15 02:09:20,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1300, Unknown=0, NotChecked=0, Total=1482
[2022-02-15 02:09:20,104 INFO L87 Difference]: Start difference. First operand 478 states and 564 transitions. Second operand has 37 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 36 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:09:21,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:09:21,707 INFO L93 Difference]: Finished difference Result 895 states and 1054 transitions.
[2022-02-15 02:09:21,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states.
[2022-02-15 02:09:21,707 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 36 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 70
[2022-02-15 02:09:21,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:09:21,708 INFO L225 Difference]: With dead ends: 895
[2022-02-15 02:09:21,708 INFO L226 Difference]: Without dead ends: 517
[2022-02-15 02:09:21,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 12 SyntacticMatches, 17 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=227, Invalid=1495, Unknown=0, NotChecked=0, Total=1722
[2022-02-15 02:09:21,709 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 76 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 2253 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 2278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 2253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time
[2022-02-15 02:09:21,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 69 Invalid, 2278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 2253 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time]
[2022-02-15 02:09:21,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states.
[2022-02-15 02:09:22,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 478.
[2022-02-15 02:09:22,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 463 states have (on average 1.181425485961123) internal successors, (547), 466 states have internal predecessors, (547), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:09:22,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 564 transitions.
[2022-02-15 02:09:22,517 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 564 transitions. Word has length 70
[2022-02-15 02:09:22,517 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:09:22,518 INFO L470 AbstractCegarLoop]: Abstraction has 478 states and 564 transitions.
[2022-02-15 02:09:22,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 36 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:09:22,518 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 564 transitions.
[2022-02-15 02:09:22,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71
[2022-02-15 02:09:22,518 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:09:22,518 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 14, 2, 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 02:09:22,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132
[2022-02-15 02:09:22,518 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:09:22,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:09:22,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1312481630, now seen corresponding path program 119 times
[2022-02-15 02:09:22,518 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:09:22,518 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [833759317]
[2022-02-15 02:09:22,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:09:22,553 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:09:22,586 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:09:22,586 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:09:22,633 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:09:22,675 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:09:22,675 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:09:22,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:09:22,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:09:22,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:09:22,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:09:22,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:09:22,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:09:22,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:09:23,563 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:09:23,564 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [833759317]
[2022-02-15 02:09:23,564 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [833759317] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:09:23,564 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:09:23,564 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38
[2022-02-15 02:09:23,564 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475243479]
[2022-02-15 02:09:23,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:09:23,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states
[2022-02-15 02:09:23,564 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:09:23,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants.
[2022-02-15 02:09:23,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1370, Unknown=0, NotChecked=0, Total=1560
[2022-02-15 02:09:23,565 INFO L87 Difference]: Start difference. First operand 478 states and 564 transitions. Second operand has 38 states, 38 states have (on average 1.6842105263157894) internal successors, (64), 37 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:09:25,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:09:25,074 INFO L93 Difference]: Finished difference Result 890 states and 1049 transitions.
[2022-02-15 02:09:25,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states.
[2022-02-15 02:09:25,074 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.6842105263157894) internal successors, (64), 37 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 70
[2022-02-15 02:09:25,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:09:25,075 INFO L225 Difference]: With dead ends: 890
[2022-02-15 02:09:25,075 INFO L226 Difference]: Without dead ends: 512
[2022-02-15 02:09:25,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 12 SyntacticMatches, 16 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=237, Invalid=1569, Unknown=0, NotChecked=0, Total=1806
[2022-02-15 02:09:25,076 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 82 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 2053 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 2079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 2053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time
[2022-02-15 02:09:25,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 58 Invalid, 2079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 2053 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time]
[2022-02-15 02:09:25,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states.
[2022-02-15 02:09:25,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 478.
[2022-02-15 02:09:25,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 463 states have (on average 1.181425485961123) internal successors, (547), 466 states have internal predecessors, (547), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:09:25,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 564 transitions.
[2022-02-15 02:09:25,825 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 564 transitions. Word has length 70
[2022-02-15 02:09:25,825 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:09:25,825 INFO L470 AbstractCegarLoop]: Abstraction has 478 states and 564 transitions.
[2022-02-15 02:09:25,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.6842105263157894) internal successors, (64), 37 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:09:25,825 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 564 transitions.
[2022-02-15 02:09:25,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71
[2022-02-15 02:09:25,825 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:09:25,825 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 15, 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 02:09:25,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133
[2022-02-15 02:09:25,826 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:09:25,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:09:25,826 INFO L85 PathProgramCache]: Analyzing trace with hash 301364380, now seen corresponding path program 120 times
[2022-02-15 02:09:25,826 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:09:25,826 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [44028615]
[2022-02-15 02:09:25,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:09:25,872 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:09:25,873 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE
[2022-02-15 02:09:25,907 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:09:25,949 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:09:25,949 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:09:25,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:09:25,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:09:25,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:09:25,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:09:25,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:09:25,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:09:25,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:09:26,838 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:09:26,838 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [44028615]
[2022-02-15 02:09:26,838 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [44028615] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:09:26,838 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:09:26,838 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39
[2022-02-15 02:09:26,838 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068608541]
[2022-02-15 02:09:26,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:09:26,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states
[2022-02-15 02:09:26,838 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:09:26,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants.
[2022-02-15 02:09:26,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1442, Unknown=0, NotChecked=0, Total=1640
[2022-02-15 02:09:26,839 INFO L87 Difference]: Start difference. First operand 478 states and 564 transitions. Second operand has 39 states, 39 states have (on average 1.641025641025641) internal successors, (64), 38 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:09:28,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:09:28,542 INFO L93 Difference]: Finished difference Result 904 states and 1073 transitions.
[2022-02-15 02:09:28,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states.
[2022-02-15 02:09:28,542 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.641025641025641) internal successors, (64), 38 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 70
[2022-02-15 02:09:28,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:09:28,543 INFO L225 Difference]: With dead ends: 904
[2022-02-15 02:09:28,543 INFO L226 Difference]: Without dead ends: 515
[2022-02-15 02:09:28,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 12 SyntacticMatches, 15 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=247, Invalid=1645, Unknown=0, NotChecked=0, Total=1892
[2022-02-15 02:09:28,544 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 86 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 2648 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 2676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 2648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time
[2022-02-15 02:09:28,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 71 Invalid, 2676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 2648 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time]
[2022-02-15 02:09:28,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states.
[2022-02-15 02:09:29,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 490.
[2022-02-15 02:09:29,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 475 states have (on average 1.1852631578947368) internal successors, (563), 478 states have internal predecessors, (563), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:09:29,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 580 transitions.
[2022-02-15 02:09:29,285 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 580 transitions. Word has length 70
[2022-02-15 02:09:29,286 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:09:29,286 INFO L470 AbstractCegarLoop]: Abstraction has 490 states and 580 transitions.
[2022-02-15 02:09:29,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.641025641025641) internal successors, (64), 38 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:09:29,286 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 580 transitions.
[2022-02-15 02:09:29,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74
[2022-02-15 02:09:29,286 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:09:29,286 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 16, 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 02:09:29,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134
[2022-02-15 02:09:29,286 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:09:29,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:09:29,287 INFO L85 PathProgramCache]: Analyzing trace with hash -5032545, now seen corresponding path program 121 times
[2022-02-15 02:09:29,287 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:09:29,287 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1771633376]
[2022-02-15 02:09:29,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:09:29,335 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:09:29,368 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:09:29,368 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:09:29,402 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:09:29,443 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:09:29,444 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:09:29,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:09:29,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:09:29,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:09:29,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:09:29,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:09:29,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:09:29,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:09:30,240 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:09:30,240 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1771633376]
[2022-02-15 02:09:30,240 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1771633376] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:09:30,240 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:09:30,240 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26
[2022-02-15 02:09:30,240 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780645110]
[2022-02-15 02:09:30,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:09:30,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states
[2022-02-15 02:09:30,240 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:09:30,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants.
[2022-02-15 02:09:30,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756
[2022-02-15 02:09:30,241 INFO L87 Difference]: Start difference. First operand 490 states and 580 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:09:32,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:09:32,361 INFO L93 Difference]: Finished difference Result 1024 states and 1190 transitions.
[2022-02-15 02:09:32,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states.
[2022-02-15 02:09:32,361 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 73
[2022-02-15 02:09:32,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:09:32,362 INFO L225 Difference]: With dead ends: 1024
[2022-02-15 02:09:32,362 INFO L226 Difference]: Without dead ends: 637
[2022-02-15 02:09:32,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 12 SyntacticMatches, 31 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=110, Invalid=820, Unknown=0, NotChecked=0, Total=930
[2022-02-15 02:09:32,362 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 49 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1844 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 1857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time
[2022-02-15 02:09:32,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 68 Invalid, 1857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1844 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time]
[2022-02-15 02:09:32,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states.
[2022-02-15 02:09:33,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 499.
[2022-02-15 02:09:33,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 484 states have (on average 1.1818181818181819) internal successors, (572), 487 states have internal predecessors, (572), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:09:33,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 589 transitions.
[2022-02-15 02:09:33,195 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 589 transitions. Word has length 73
[2022-02-15 02:09:33,195 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:09:33,195 INFO L470 AbstractCegarLoop]: Abstraction has 499 states and 589 transitions.
[2022-02-15 02:09:33,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:09:33,196 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 589 transitions.
[2022-02-15 02:09:33,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74
[2022-02-15 02:09:33,196 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:09:33,196 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 15, 2, 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 02:09:33,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135
[2022-02-15 02:09:33,196 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:09:33,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:09:33,196 INFO L85 PathProgramCache]: Analyzing trace with hash 35642205, now seen corresponding path program 122 times
[2022-02-15 02:09:33,196 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:09:33,196 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [658686921]
[2022-02-15 02:09:33,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:09:33,249 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:09:33,293 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:09:33,293 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:09:33,339 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:09:33,373 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:09:33,373 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:09:33,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:09:33,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:09:33,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:09:33,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:09:33,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:09:33,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:09:33,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:09:34,223 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:09:34,223 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [658686921]
[2022-02-15 02:09:34,223 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [658686921] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:09:34,223 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:09:34,223 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27
[2022-02-15 02:09:34,223 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625791628]
[2022-02-15 02:09:34,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:09:34,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states
[2022-02-15 02:09:34,223 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:09:34,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants.
[2022-02-15 02:09:34,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812
[2022-02-15 02:09:34,224 INFO L87 Difference]: Start difference. First operand 499 states and 589 transitions. Second operand has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 26 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:09:36,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:09:36,505 INFO L93 Difference]: Finished difference Result 1042 states and 1208 transitions.
[2022-02-15 02:09:36,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states.
[2022-02-15 02:09:36,505 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 26 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 73
[2022-02-15 02:09:36,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:09:36,506 INFO L225 Difference]: With dead ends: 1042
[2022-02-15 02:09:36,507 INFO L226 Difference]: Without dead ends: 646
[2022-02-15 02:09:36,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 12 SyntacticMatches, 30 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992
[2022-02-15 02:09:36,507 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 54 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 1899 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time
[2022-02-15 02:09:36,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 55 Invalid, 1913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1899 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time]
[2022-02-15 02:09:36,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states.
[2022-02-15 02:09:37,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 499.
[2022-02-15 02:09:37,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 484 states have (on average 1.1818181818181819) internal successors, (572), 487 states have internal predecessors, (572), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:09:37,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 589 transitions.
[2022-02-15 02:09:37,483 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 589 transitions. Word has length 73
[2022-02-15 02:09:37,483 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:09:37,483 INFO L470 AbstractCegarLoop]: Abstraction has 499 states and 589 transitions.
[2022-02-15 02:09:37,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 26 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:09:37,483 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 589 transitions.
[2022-02-15 02:09:37,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74
[2022-02-15 02:09:37,483 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:09:37,483 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 14, 3, 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 02:09:37,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136
[2022-02-15 02:09:37,483 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:09:37,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:09:37,483 INFO L85 PathProgramCache]: Analyzing trace with hash 479542879, now seen corresponding path program 123 times
[2022-02-15 02:09:37,483 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:09:37,484 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [551795160]
[2022-02-15 02:09:37,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:09:37,530 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:09:37,573 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:09:37,573 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:09:37,607 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:09:37,649 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:09:37,650 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:09:37,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:09:37,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:09:37,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:09:37,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:09:37,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:09:37,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:09:37,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:09:38,463 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:09:38,463 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [551795160]
[2022-02-15 02:09:38,463 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [551795160] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:09:38,463 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:09:38,463 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28
[2022-02-15 02:09:38,463 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33387631]
[2022-02-15 02:09:38,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:09:38,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states
[2022-02-15 02:09:38,463 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:09:38,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants.
[2022-02-15 02:09:38,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870
[2022-02-15 02:09:38,464 INFO L87 Difference]: Start difference. First operand 499 states and 589 transitions. Second operand has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:09:40,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:09:40,749 INFO L93 Difference]: Finished difference Result 1033 states and 1199 transitions.
[2022-02-15 02:09:40,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states.
[2022-02-15 02:09:40,750 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 73
[2022-02-15 02:09:40,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:09:40,751 INFO L225 Difference]: With dead ends: 1033
[2022-02-15 02:09:40,751 INFO L226 Difference]: Without dead ends: 637
[2022-02-15 02:09:40,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 12 SyntacticMatches, 29 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=130, Invalid=926, Unknown=0, NotChecked=0, Total=1056
[2022-02-15 02:09:40,752 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 54 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1946 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 1961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time
[2022-02-15 02:09:40,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 68 Invalid, 1961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1946 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time]
[2022-02-15 02:09:40,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states.
[2022-02-15 02:09:41,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 499.
[2022-02-15 02:09:41,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 484 states have (on average 1.1818181818181819) internal successors, (572), 487 states have internal predecessors, (572), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:09:41,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 589 transitions.
[2022-02-15 02:09:41,837 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 589 transitions. Word has length 73
[2022-02-15 02:09:41,837 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:09:41,837 INFO L470 AbstractCegarLoop]: Abstraction has 499 states and 589 transitions.
[2022-02-15 02:09:41,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:09:41,837 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 589 transitions.
[2022-02-15 02:09:41,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74
[2022-02-15 02:09:41,837 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:09:41,837 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 13, 4, 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 02:09:41,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137
[2022-02-15 02:09:41,837 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:09:41,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:09:41,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1537379, now seen corresponding path program 124 times
[2022-02-15 02:09:41,838 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:09:41,838 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [218547460]
[2022-02-15 02:09:41,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:09:41,872 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:09:41,915 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:09:41,915 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:09:41,949 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:09:41,991 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:09:41,991 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:09:41,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:09:41,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:09:42,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:09:42,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:09:42,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:09:42,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:09:42,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:09:42,831 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:09:42,831 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [218547460]
[2022-02-15 02:09:42,832 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [218547460] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:09:42,832 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:09:42,832 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29
[2022-02-15 02:09:42,832 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186416300]
[2022-02-15 02:09:42,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:09:42,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states
[2022-02-15 02:09:42,832 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:09:42,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants.
[2022-02-15 02:09:42,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=817, Unknown=0, NotChecked=0, Total=930
[2022-02-15 02:09:42,833 INFO L87 Difference]: Start difference. First operand 499 states and 589 transitions. Second operand has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:09:45,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:09:45,122 INFO L93 Difference]: Finished difference Result 1024 states and 1190 transitions.
[2022-02-15 02:09:45,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states.
[2022-02-15 02:09:45,123 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 73
[2022-02-15 02:09:45,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:09:45,124 INFO L225 Difference]: With dead ends: 1024
[2022-02-15 02:09:45,124 INFO L226 Difference]: Without dead ends: 628
[2022-02-15 02:09:45,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 12 SyntacticMatches, 28 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=140, Invalid=982, Unknown=0, NotChecked=0, Total=1122
[2022-02-15 02:09:45,125 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 58 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 2075 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 2091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 2075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time
[2022-02-15 02:09:45,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 57 Invalid, 2091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 2075 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time]
[2022-02-15 02:09:45,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states.
[2022-02-15 02:09:46,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 499.
[2022-02-15 02:09:46,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 484 states have (on average 1.1818181818181819) internal successors, (572), 487 states have internal predecessors, (572), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:09:46,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 589 transitions.
[2022-02-15 02:09:46,026 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 589 transitions. Word has length 73
[2022-02-15 02:09:46,026 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:09:46,026 INFO L470 AbstractCegarLoop]: Abstraction has 499 states and 589 transitions.
[2022-02-15 02:09:46,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:09:46,026 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 589 transitions.
[2022-02-15 02:09:46,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74
[2022-02-15 02:09:46,026 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:09:46,026 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 12, 5, 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 02:09:46,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138
[2022-02-15 02:09:46,027 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:09:46,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:09:46,027 INFO L85 PathProgramCache]: Analyzing trace with hash -354625761, now seen corresponding path program 125 times
[2022-02-15 02:09:46,027 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:09:46,027 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [446119430]
[2022-02-15 02:09:46,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:09:46,074 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:09:46,107 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:09:46,107 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:09:46,141 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:09:46,173 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:09:46,174 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:09:46,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:09:46,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:09:46,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:09:46,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:09:46,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:09:46,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:09:46,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:09:47,007 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:09:47,008 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [446119430]
[2022-02-15 02:09:47,008 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [446119430] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:09:47,008 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:09:47,008 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30
[2022-02-15 02:09:47,008 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85595915]
[2022-02-15 02:09:47,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:09:47,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states
[2022-02-15 02:09:47,008 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:09:47,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants.
[2022-02-15 02:09:47,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=926, Unknown=0, NotChecked=0, Total=1056
[2022-02-15 02:09:47,009 INFO L87 Difference]: Start difference. First operand 499 states and 589 transitions. Second operand has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 29 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:09:49,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:09:49,126 INFO L93 Difference]: Finished difference Result 1015 states and 1177 transitions.
[2022-02-15 02:09:49,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states.
[2022-02-15 02:09:49,127 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 29 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 73
[2022-02-15 02:09:49,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:09:49,127 INFO L225 Difference]: With dead ends: 1015
[2022-02-15 02:09:49,127 INFO L226 Difference]: Without dead ends: 619
[2022-02-15 02:09:49,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 12 SyntacticMatches, 27 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=149, Invalid=1041, Unknown=0, NotChecked=0, Total=1190
[2022-02-15 02:09:49,128 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 66 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 1531 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time
[2022-02-15 02:09:49,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 45 Invalid, 1550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1531 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time]
[2022-02-15 02:09:49,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states.
[2022-02-15 02:09:50,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 499.
[2022-02-15 02:09:50,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 484 states have (on average 1.1818181818181819) internal successors, (572), 487 states have internal predecessors, (572), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:09:50,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 589 transitions.
[2022-02-15 02:09:50,093 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 589 transitions. Word has length 73
[2022-02-15 02:09:50,093 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:09:50,093 INFO L470 AbstractCegarLoop]: Abstraction has 499 states and 589 transitions.
[2022-02-15 02:09:50,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 29 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:09:50,093 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 589 transitions.
[2022-02-15 02:09:50,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74
[2022-02-15 02:09:50,094 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:09:50,094 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 11, 6, 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 02:09:50,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139
[2022-02-15 02:09:50,094 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:09:50,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:09:50,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1890953693, now seen corresponding path program 126 times
[2022-02-15 02:09:50,094 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:09:50,094 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [53532326]
[2022-02-15 02:09:50,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:09:50,144 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:09:50,188 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:09:50,188 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:09:50,222 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:09:50,259 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:09:50,260 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:09:50,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:09:50,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:09:50,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:09:50,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:09:50,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:09:50,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:09:50,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:09:51,079 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:09:51,080 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [53532326]
[2022-02-15 02:09:51,080 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [53532326] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:09:51,080 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:09:51,080 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31
[2022-02-15 02:09:51,080 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537580981]
[2022-02-15 02:09:51,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:09:51,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states
[2022-02-15 02:09:51,080 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:09:51,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants.
[2022-02-15 02:09:51,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056
[2022-02-15 02:09:51,081 INFO L87 Difference]: Start difference. First operand 499 states and 589 transitions. Second operand has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 30 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:09:53,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:09:53,183 INFO L93 Difference]: Finished difference Result 1006 states and 1172 transitions.
[2022-02-15 02:09:53,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states.
[2022-02-15 02:09:53,183 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 30 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 73
[2022-02-15 02:09:53,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:09:53,184 INFO L225 Difference]: With dead ends: 1006
[2022-02-15 02:09:53,184 INFO L226 Difference]: Without dead ends: 610
[2022-02-15 02:09:53,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 12 SyntacticMatches, 26 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=160, Invalid=1100, Unknown=0, NotChecked=0, Total=1260
[2022-02-15 02:09:53,184 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 70 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 1768 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time
[2022-02-15 02:09:53,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 55 Invalid, 1786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1768 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time]
[2022-02-15 02:09:53,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states.
[2022-02-15 02:09:54,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 499.
[2022-02-15 02:09:54,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 484 states have (on average 1.1818181818181819) internal successors, (572), 487 states have internal predecessors, (572), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:09:54,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 589 transitions.
[2022-02-15 02:09:54,103 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 589 transitions. Word has length 73
[2022-02-15 02:09:54,103 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:09:54,103 INFO L470 AbstractCegarLoop]: Abstraction has 499 states and 589 transitions.
[2022-02-15 02:09:54,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 30 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:09:54,104 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 589 transitions.
[2022-02-15 02:09:54,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74
[2022-02-15 02:09:54,104 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:09:54,104 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 10, 7, 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 02:09:54,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140
[2022-02-15 02:09:54,104 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:09:54,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:09:54,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1980366881, now seen corresponding path program 127 times
[2022-02-15 02:09:54,104 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:09:54,104 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [611046511]
[2022-02-15 02:09:54,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:09:54,141 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:09:54,184 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:09:54,184 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:09:54,219 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:09:54,262 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:09:54,262 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:09:54,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:09:54,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:09:54,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:09:54,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:09:54,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:09:54,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:09:54,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:09:55,110 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:09:55,110 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [611046511]
[2022-02-15 02:09:55,110 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [611046511] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:09:55,110 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:09:55,110 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32
[2022-02-15 02:09:55,110 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228689050]
[2022-02-15 02:09:55,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:09:55,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states
[2022-02-15 02:09:55,110 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:09:55,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants.
[2022-02-15 02:09:55,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1044, Unknown=0, NotChecked=0, Total=1190
[2022-02-15 02:09:55,111 INFO L87 Difference]: Start difference. First operand 499 states and 589 transitions. Second operand has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:09:57,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:09:57,394 INFO L93 Difference]: Finished difference Result 1003 states and 1165 transitions.
[2022-02-15 02:09:57,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states.
[2022-02-15 02:09:57,394 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 73
[2022-02-15 02:09:57,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:09:57,395 INFO L225 Difference]: With dead ends: 1003
[2022-02-15 02:09:57,395 INFO L226 Difference]: Without dead ends: 607
[2022-02-15 02:09:57,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 12 SyntacticMatches, 25 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=169, Invalid=1163, Unknown=0, NotChecked=0, Total=1332
[2022-02-15 02:09:57,395 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 66 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 2287 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 2307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 2287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time
[2022-02-15 02:09:57,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 55 Invalid, 2307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 2287 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time]
[2022-02-15 02:09:57,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states.
[2022-02-15 02:09:58,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 499.
[2022-02-15 02:09:58,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 484 states have (on average 1.1818181818181819) internal successors, (572), 487 states have internal predecessors, (572), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:09:58,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 589 transitions.
[2022-02-15 02:09:58,327 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 589 transitions. Word has length 73
[2022-02-15 02:09:58,327 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:09:58,327 INFO L470 AbstractCegarLoop]: Abstraction has 499 states and 589 transitions.
[2022-02-15 02:09:58,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:09:58,327 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 589 transitions.
[2022-02-15 02:09:58,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74
[2022-02-15 02:09:58,328 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:09:58,328 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 9, 8, 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 02:09:58,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141
[2022-02-15 02:09:58,328 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:09:58,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:09:58,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1285241117, now seen corresponding path program 128 times
[2022-02-15 02:09:58,328 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:09:58,328 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1245093748]
[2022-02-15 02:09:58,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:09:58,363 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:09:58,396 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:09:58,396 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:09:58,449 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:09:58,492 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:09:58,493 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:09:58,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:09:58,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:09:58,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:09:58,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:09:58,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:09:58,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:09:58,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:09:59,353 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:09:59,353 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1245093748]
[2022-02-15 02:09:59,353 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1245093748] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:09:59,353 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:09:59,353 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33
[2022-02-15 02:09:59,353 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065700174]
[2022-02-15 02:09:59,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:09:59,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states
[2022-02-15 02:09:59,354 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:09:59,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants.
[2022-02-15 02:09:59,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1106, Unknown=0, NotChecked=0, Total=1260
[2022-02-15 02:09:59,354 INFO L87 Difference]: Start difference. First operand 499 states and 589 transitions. Second operand has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:10:01,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:10:01,563 INFO L93 Difference]: Finished difference Result 997 states and 1159 transitions.
[2022-02-15 02:10:01,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states.
[2022-02-15 02:10:01,563 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 73
[2022-02-15 02:10:01,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:10:01,564 INFO L225 Difference]: With dead ends: 997
[2022-02-15 02:10:01,564 INFO L226 Difference]: Without dead ends: 601
[2022-02-15 02:10:01,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 12 SyntacticMatches, 24 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 894 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=179, Invalid=1227, Unknown=0, NotChecked=0, Total=1406
[2022-02-15 02:10:01,565 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 64 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 2124 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 2144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 2124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time
[2022-02-15 02:10:01,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 56 Invalid, 2144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 2124 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time]
[2022-02-15 02:10:01,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states.
[2022-02-15 02:10:02,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 499.
[2022-02-15 02:10:02,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 484 states have (on average 1.1818181818181819) internal successors, (572), 487 states have internal predecessors, (572), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:10:02,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 589 transitions.
[2022-02-15 02:10:02,504 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 589 transitions. Word has length 73
[2022-02-15 02:10:02,504 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:10:02,504 INFO L470 AbstractCegarLoop]: Abstraction has 499 states and 589 transitions.
[2022-02-15 02:10:02,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:10:02,504 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 589 transitions.
[2022-02-15 02:10:02,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74
[2022-02-15 02:10:02,504 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:10:02,504 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 9, 8, 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 02:10:02,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142
[2022-02-15 02:10:02,504 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:10:02,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:10:02,505 INFO L85 PathProgramCache]: Analyzing trace with hash 441235615, now seen corresponding path program 129 times
[2022-02-15 02:10:02,505 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:10:02,505 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [536907494]
[2022-02-15 02:10:02,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:10:02,561 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:10:02,604 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:10:02,604 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:10:02,665 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:10:02,708 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:10:02,708 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:10:02,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:10:02,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:10:02,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:10:02,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:10:02,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:10:02,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:10:02,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:10:03,575 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:10:03,575 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [536907494]
[2022-02-15 02:10:03,575 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [536907494] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:10:03,575 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:10:03,575 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34
[2022-02-15 02:10:03,575 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265338185]
[2022-02-15 02:10:03,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:10:03,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states
[2022-02-15 02:10:03,575 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:10:03,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants.
[2022-02-15 02:10:03,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1107, Unknown=0, NotChecked=0, Total=1260
[2022-02-15 02:10:03,576 INFO L87 Difference]: Start difference. First operand 499 states and 589 transitions. Second operand has 34 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 33 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:10:05,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:10:05,678 INFO L93 Difference]: Finished difference Result 979 states and 1145 transitions.
[2022-02-15 02:10:05,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states.
[2022-02-15 02:10:05,679 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 33 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 73
[2022-02-15 02:10:05,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:10:05,679 INFO L225 Difference]: With dead ends: 979
[2022-02-15 02:10:05,679 INFO L226 Difference]: Without dead ends: 583
[2022-02-15 02:10:05,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 12 SyntacticMatches, 23 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 883 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=190, Invalid=1292, Unknown=0, NotChecked=0, Total=1482
[2022-02-15 02:10:05,680 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 74 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 2369 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 2390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 2369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time
[2022-02-15 02:10:05,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 71 Invalid, 2390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 2369 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time]
[2022-02-15 02:10:05,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states.
[2022-02-15 02:10:06,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 499.
[2022-02-15 02:10:06,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 484 states have (on average 1.1818181818181819) internal successors, (572), 487 states have internal predecessors, (572), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:10:06,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 589 transitions.
[2022-02-15 02:10:06,631 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 589 transitions. Word has length 73
[2022-02-15 02:10:06,631 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:10:06,631 INFO L470 AbstractCegarLoop]: Abstraction has 499 states and 589 transitions.
[2022-02-15 02:10:06,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 33 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:10:06,631 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 589 transitions.
[2022-02-15 02:10:06,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74
[2022-02-15 02:10:06,632 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:10:06,632 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 10, 7, 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 02:10:06,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143
[2022-02-15 02:10:06,632 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:10:06,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:10:06,632 INFO L85 PathProgramCache]: Analyzing trace with hash 715995229, now seen corresponding path program 130 times
[2022-02-15 02:10:06,632 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:10:06,632 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [805594410]
[2022-02-15 02:10:06,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:10:06,679 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:10:06,723 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:10:06,723 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:10:06,760 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:10:06,813 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:10:06,813 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:10:06,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:10:06,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:10:06,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:10:06,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:10:06,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:10:06,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:10:06,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:10:07,711 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:10:07,712 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [805594410]
[2022-02-15 02:10:07,712 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [805594410] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:10:07,712 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:10:07,712 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35
[2022-02-15 02:10:07,712 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476889]
[2022-02-15 02:10:07,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:10:07,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states
[2022-02-15 02:10:07,712 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:10:07,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants.
[2022-02-15 02:10:07,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1171, Unknown=0, NotChecked=0, Total=1332
[2022-02-15 02:10:07,713 INFO L87 Difference]: Start difference. First operand 499 states and 589 transitions. Second operand has 35 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 34 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:10:09,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:10:09,783 INFO L93 Difference]: Finished difference Result 970 states and 1136 transitions.
[2022-02-15 02:10:09,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states.
[2022-02-15 02:10:09,783 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 34 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 73
[2022-02-15 02:10:09,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:10:09,784 INFO L225 Difference]: With dead ends: 970
[2022-02-15 02:10:09,784 INFO L226 Difference]: Without dead ends: 574
[2022-02-15 02:10:09,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 12 SyntacticMatches, 22 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=200, Invalid=1360, Unknown=0, NotChecked=0, Total=1560
[2022-02-15 02:10:09,784 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 74 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 2482 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 2504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 2482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time
[2022-02-15 02:10:09,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 70 Invalid, 2504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 2482 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time]
[2022-02-15 02:10:09,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states.
[2022-02-15 02:10:10,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 499.
[2022-02-15 02:10:10,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 484 states have (on average 1.1818181818181819) internal successors, (572), 487 states have internal predecessors, (572), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:10:10,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 589 transitions.
[2022-02-15 02:10:10,723 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 589 transitions. Word has length 73
[2022-02-15 02:10:10,723 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:10:10,723 INFO L470 AbstractCegarLoop]: Abstraction has 499 states and 589 transitions.
[2022-02-15 02:10:10,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 34 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:10:10,723 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 589 transitions.
[2022-02-15 02:10:10,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74
[2022-02-15 02:10:10,723 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:10:10,723 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 11, 6, 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 02:10:10,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144
[2022-02-15 02:10:10,724 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:10:10,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:10:10,724 INFO L85 PathProgramCache]: Analyzing trace with hash 2102198623, now seen corresponding path program 131 times
[2022-02-15 02:10:10,724 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:10:10,724 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [327176252]
[2022-02-15 02:10:10,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:10:10,771 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:10:10,804 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:10:10,804 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:10:10,851 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:10:10,892 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:10:10,893 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:10:10,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:10:10,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:10:10,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:10:10,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:10:10,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:10:10,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:10:10,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:10:11,770 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:10:11,770 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [327176252]
[2022-02-15 02:10:11,770 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [327176252] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:10:11,770 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:10:11,770 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36
[2022-02-15 02:10:11,770 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270785330]
[2022-02-15 02:10:11,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:10:11,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states
[2022-02-15 02:10:11,771 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:10:11,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants.
[2022-02-15 02:10:11,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1237, Unknown=0, NotChecked=0, Total=1406
[2022-02-15 02:10:11,771 INFO L87 Difference]: Start difference. First operand 499 states and 589 transitions. Second operand has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:10:13,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:10:13,669 INFO L93 Difference]: Finished difference Result 961 states and 1127 transitions.
[2022-02-15 02:10:13,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states.
[2022-02-15 02:10:13,669 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 73
[2022-02-15 02:10:13,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:10:13,670 INFO L225 Difference]: With dead ends: 961
[2022-02-15 02:10:13,670 INFO L226 Difference]: Without dead ends: 565
[2022-02-15 02:10:13,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 12 SyntacticMatches, 21 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 910 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=210, Invalid=1430, Unknown=0, NotChecked=0, Total=1640
[2022-02-15 02:10:13,670 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 87 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 2091 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 2114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 2091 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time
[2022-02-15 02:10:13,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 55 Invalid, 2114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 2091 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time]
[2022-02-15 02:10:13,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states.
[2022-02-15 02:10:14,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 499.
[2022-02-15 02:10:14,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 484 states have (on average 1.1818181818181819) internal successors, (572), 487 states have internal predecessors, (572), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:10:14,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 589 transitions.
[2022-02-15 02:10:14,616 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 589 transitions. Word has length 73
[2022-02-15 02:10:14,616 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:10:14,616 INFO L470 AbstractCegarLoop]: Abstraction has 499 states and 589 transitions.
[2022-02-15 02:10:14,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:10:14,616 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 589 transitions.
[2022-02-15 02:10:14,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74
[2022-02-15 02:10:14,616 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:10:14,616 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 12, 5, 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 02:10:14,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145
[2022-02-15 02:10:14,617 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:10:14,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:10:14,617 INFO L85 PathProgramCache]: Analyzing trace with hash -2130729059, now seen corresponding path program 132 times
[2022-02-15 02:10:14,617 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:10:14,617 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [207784274]
[2022-02-15 02:10:14,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:10:14,664 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:10:14,706 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:10:14,706 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:10:14,740 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:10:14,781 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:10:14,782 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:10:14,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:10:14,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:10:14,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:10:14,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:10:14,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:10:14,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:10:14,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:10:15,664 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:10:15,664 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [207784274]
[2022-02-15 02:10:15,664 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [207784274] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:10:15,664 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:10:15,664 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37
[2022-02-15 02:10:15,664 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755370362]
[2022-02-15 02:10:15,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:10:15,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states
[2022-02-15 02:10:15,664 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:10:15,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants.
[2022-02-15 02:10:15,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1374, Unknown=0, NotChecked=0, Total=1560
[2022-02-15 02:10:15,665 INFO L87 Difference]: Start difference. First operand 499 states and 589 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:10:17,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:10:17,644 INFO L93 Difference]: Finished difference Result 973 states and 1135 transitions.
[2022-02-15 02:10:17,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states.
[2022-02-15 02:10:17,644 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 73
[2022-02-15 02:10:17,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:10:17,644 INFO L225 Difference]: With dead ends: 973
[2022-02-15 02:10:17,644 INFO L226 Difference]: Without dead ends: 577
[2022-02-15 02:10:17,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 12 SyntacticMatches, 20 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 940 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=219, Invalid=1503, Unknown=0, NotChecked=0, Total=1722
[2022-02-15 02:10:17,645 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 101 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 1750 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 1776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time
[2022-02-15 02:10:17,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 41 Invalid, 1776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1750 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time]
[2022-02-15 02:10:17,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states.
[2022-02-15 02:10:18,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 499.
[2022-02-15 02:10:18,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 484 states have (on average 1.1818181818181819) internal successors, (572), 487 states have internal predecessors, (572), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:10:18,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 589 transitions.
[2022-02-15 02:10:18,597 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 589 transitions. Word has length 73
[2022-02-15 02:10:18,597 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:10:18,597 INFO L470 AbstractCegarLoop]: Abstraction has 499 states and 589 transitions.
[2022-02-15 02:10:18,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:10:18,598 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 589 transitions.
[2022-02-15 02:10:18,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74
[2022-02-15 02:10:18,598 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:10:18,598 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 13, 4, 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 02:10:18,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146
[2022-02-15 02:10:18,598 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:10:18,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:10:18,598 INFO L85 PathProgramCache]: Analyzing trace with hash 358799903, now seen corresponding path program 133 times
[2022-02-15 02:10:18,598 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:10:18,598 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1507327301]
[2022-02-15 02:10:18,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:10:18,633 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:10:18,676 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:10:18,676 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:10:18,710 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:10:18,758 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:10:18,758 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:10:18,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:10:18,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:10:18,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:10:18,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:10:18,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:10:18,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:10:18,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:10:19,691 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:10:19,691 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1507327301]
[2022-02-15 02:10:19,691 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1507327301] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:10:19,692 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:10:19,692 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38
[2022-02-15 02:10:19,692 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116376043]
[2022-02-15 02:10:19,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:10:19,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states
[2022-02-15 02:10:19,692 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:10:19,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants.
[2022-02-15 02:10:19,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1375, Unknown=0, NotChecked=0, Total=1560
[2022-02-15 02:10:19,692 INFO L87 Difference]: Start difference. First operand 499 states and 589 transitions. Second operand has 38 states, 38 states have (on average 1.763157894736842) internal successors, (67), 37 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:10:21,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:10:21,385 INFO L93 Difference]: Finished difference Result 943 states and 1109 transitions.
[2022-02-15 02:10:21,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states.
[2022-02-15 02:10:21,386 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.763157894736842) internal successors, (67), 37 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 73
[2022-02-15 02:10:21,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:10:21,387 INFO L225 Difference]: With dead ends: 943
[2022-02-15 02:10:21,387 INFO L226 Difference]: Without dead ends: 547
[2022-02-15 02:10:21,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 12 SyntacticMatches, 19 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=230, Invalid=1576, Unknown=0, NotChecked=0, Total=1806
[2022-02-15 02:10:21,388 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 86 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 1741 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time
[2022-02-15 02:10:21,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 44 Invalid, 1766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1741 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time]
[2022-02-15 02:10:21,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states.
[2022-02-15 02:10:22,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 499.
[2022-02-15 02:10:22,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 484 states have (on average 1.1818181818181819) internal successors, (572), 487 states have internal predecessors, (572), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:10:22,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 589 transitions.
[2022-02-15 02:10:22,319 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 589 transitions. Word has length 73
[2022-02-15 02:10:22,319 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:10:22,319 INFO L470 AbstractCegarLoop]: Abstraction has 499 states and 589 transitions.
[2022-02-15 02:10:22,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.763157894736842) internal successors, (67), 37 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:10:22,319 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 589 transitions.
[2022-02-15 02:10:22,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74
[2022-02-15 02:10:22,320 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:10:22,320 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 14, 3, 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 02:10:22,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147
[2022-02-15 02:10:22,320 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:10:22,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:10:22,320 INFO L85 PathProgramCache]: Analyzing trace with hash -458848547, now seen corresponding path program 134 times
[2022-02-15 02:10:22,320 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:10:22,320 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1066514977]
[2022-02-15 02:10:22,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:10:22,355 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:10:22,397 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:10:22,397 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:10:22,443 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:10:22,489 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:10:22,490 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:10:22,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:10:22,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:10:22,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:10:22,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:10:22,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:10:22,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:10:22,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:10:23,428 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:10:23,428 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1066514977]
[2022-02-15 02:10:23,428 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1066514977] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:10:23,428 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:10:23,428 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39
[2022-02-15 02:10:23,428 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960830024]
[2022-02-15 02:10:23,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:10:23,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states
[2022-02-15 02:10:23,428 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:10:23,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants.
[2022-02-15 02:10:23,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1447, Unknown=0, NotChecked=0, Total=1640
[2022-02-15 02:10:23,429 INFO L87 Difference]: Start difference. First operand 499 states and 589 transitions. Second operand has 39 states, 39 states have (on average 1.7179487179487178) internal successors, (67), 38 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:10:25,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:10:25,240 INFO L93 Difference]: Finished difference Result 934 states and 1100 transitions.
[2022-02-15 02:10:25,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states.
[2022-02-15 02:10:25,241 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.7179487179487178) internal successors, (67), 38 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 73
[2022-02-15 02:10:25,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:10:25,241 INFO L225 Difference]: With dead ends: 934
[2022-02-15 02:10:25,241 INFO L226 Difference]: Without dead ends: 538
[2022-02-15 02:10:25,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 12 SyntacticMatches, 18 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 883 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=240, Invalid=1652, Unknown=0, NotChecked=0, Total=1892
[2022-02-15 02:10:25,242 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 92 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 2304 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 2330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 2304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time
[2022-02-15 02:10:25,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 57 Invalid, 2330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 2304 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time]
[2022-02-15 02:10:25,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states.
[2022-02-15 02:10:26,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 499.
[2022-02-15 02:10:26,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 484 states have (on average 1.1818181818181819) internal successors, (572), 487 states have internal predecessors, (572), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:10:26,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 589 transitions.
[2022-02-15 02:10:26,169 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 589 transitions. Word has length 73
[2022-02-15 02:10:26,169 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:10:26,169 INFO L470 AbstractCegarLoop]: Abstraction has 499 states and 589 transitions.
[2022-02-15 02:10:26,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.7179487179487178) internal successors, (67), 38 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:10:26,170 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 589 transitions.
[2022-02-15 02:10:26,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74
[2022-02-15 02:10:26,170 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:10:26,170 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 15, 2, 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 02:10:26,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148
[2022-02-15 02:10:26,170 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:10:26,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:10:26,170 INFO L85 PathProgramCache]: Analyzing trace with hash -2047196449, now seen corresponding path program 135 times
[2022-02-15 02:10:26,170 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:10:26,170 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1538529764]
[2022-02-15 02:10:26,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:10:26,205 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:10:26,249 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:10:26,249 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:10:26,295 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:10:26,339 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:10:26,339 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:10:26,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:10:26,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:10:26,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:10:26,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:10:26,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:10:26,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:10:26,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:10:27,291 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:10:27,291 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1538529764]
[2022-02-15 02:10:27,292 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1538529764] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:10:27,292 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:10:27,292 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40
[2022-02-15 02:10:27,292 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952906361]
[2022-02-15 02:10:27,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:10:27,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states
[2022-02-15 02:10:27,292 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:10:27,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants.
[2022-02-15 02:10:27,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1521, Unknown=0, NotChecked=0, Total=1722
[2022-02-15 02:10:27,292 INFO L87 Difference]: Start difference. First operand 499 states and 589 transitions. Second operand has 40 states, 40 states have (on average 1.675) internal successors, (67), 39 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:10:29,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:10:29,231 INFO L93 Difference]: Finished difference Result 929 states and 1095 transitions.
[2022-02-15 02:10:29,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states.
[2022-02-15 02:10:29,231 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.675) internal successors, (67), 39 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 73
[2022-02-15 02:10:29,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:10:29,232 INFO L225 Difference]: With dead ends: 929
[2022-02-15 02:10:29,232 INFO L226 Difference]: Without dead ends: 533
[2022-02-15 02:10:29,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 12 SyntacticMatches, 17 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 856 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=250, Invalid=1730, Unknown=0, NotChecked=0, Total=1980
[2022-02-15 02:10:29,232 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 78 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 2784 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 2811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 2784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time
[2022-02-15 02:10:29,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 79 Invalid, 2811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 2784 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time]
[2022-02-15 02:10:29,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states.
[2022-02-15 02:10:30,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 499.
[2022-02-15 02:10:30,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 484 states have (on average 1.1818181818181819) internal successors, (572), 487 states have internal predecessors, (572), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:10:30,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 589 transitions.
[2022-02-15 02:10:30,158 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 589 transitions. Word has length 73
[2022-02-15 02:10:30,158 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:10:30,158 INFO L470 AbstractCegarLoop]: Abstraction has 499 states and 589 transitions.
[2022-02-15 02:10:30,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.675) internal successors, (67), 39 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:10:30,158 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 589 transitions.
[2022-02-15 02:10:30,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74
[2022-02-15 02:10:30,159 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:10:30,159 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 16, 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 02:10:30,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149
[2022-02-15 02:10:30,159 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:10:30,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:10:30,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1236653597, now seen corresponding path program 136 times
[2022-02-15 02:10:30,159 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:10:30,159 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1589112467]
[2022-02-15 02:10:30,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:10:30,209 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:10:30,209 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE
[2022-02-15 02:10:30,243 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:10:30,286 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:10:30,286 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:10:30,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:10:30,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:10:30,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:10:30,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:10:30,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:10:30,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:10:30,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:10:31,268 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:10:31,268 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1589112467]
[2022-02-15 02:10:31,268 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1589112467] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:10:31,268 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:10:31,268 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41
[2022-02-15 02:10:31,268 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800187137]
[2022-02-15 02:10:31,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:10:31,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states
[2022-02-15 02:10:31,268 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:10:31,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants.
[2022-02-15 02:10:31,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1597, Unknown=0, NotChecked=0, Total=1806
[2022-02-15 02:10:31,269 INFO L87 Difference]: Start difference. First operand 499 states and 589 transitions. Second operand has 41 states, 41 states have (on average 1.6341463414634145) internal successors, (67), 40 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:10:33,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:10:33,188 INFO L93 Difference]: Finished difference Result 943 states and 1119 transitions.
[2022-02-15 02:10:33,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states.
[2022-02-15 02:10:33,188 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.6341463414634145) internal successors, (67), 40 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 73
[2022-02-15 02:10:33,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:10:33,189 INFO L225 Difference]: With dead ends: 943
[2022-02-15 02:10:33,189 INFO L226 Difference]: Without dead ends: 536
[2022-02-15 02:10:33,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 12 SyntacticMatches, 16 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=260, Invalid=1810, Unknown=0, NotChecked=0, Total=2070
[2022-02-15 02:10:33,189 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 80 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 2766 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 2795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 2766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time
[2022-02-15 02:10:33,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 78 Invalid, 2795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 2766 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time]
[2022-02-15 02:10:33,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states.
[2022-02-15 02:10:34,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 511.
[2022-02-15 02:10:34,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 496 states have (on average 1.185483870967742) internal successors, (588), 499 states have internal predecessors, (588), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:10:34,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 605 transitions.
[2022-02-15 02:10:34,118 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 605 transitions. Word has length 73
[2022-02-15 02:10:34,119 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:10:34,119 INFO L470 AbstractCegarLoop]: Abstraction has 511 states and 605 transitions.
[2022-02-15 02:10:34,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.6341463414634145) internal successors, (67), 40 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:10:34,119 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 605 transitions.
[2022-02-15 02:10:34,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76
[2022-02-15 02:10:34,119 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:10:34,119 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 02:10:34,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150
[2022-02-15 02:10:34,119 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:10:34,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:10:34,119 INFO L85 PathProgramCache]: Analyzing trace with hash -482247245, now seen corresponding path program 7 times
[2022-02-15 02:10:34,120 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:10:34,120 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [447323611]
[2022-02-15 02:10:34,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:10:34,160 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:10:34,170 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:10:34,170 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:10:34,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:10:34,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:10:34,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:10:34,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:10:34,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:10:34,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:10:34,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:10:34,432 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:10:34,432 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [447323611]
[2022-02-15 02:10:34,432 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [447323611] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:10:34,432 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:10:34,432 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21
[2022-02-15 02:10:34,432 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348629095]
[2022-02-15 02:10:34,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:10:34,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states
[2022-02-15 02:10:34,433 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:10:34,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants.
[2022-02-15 02:10:34,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420
[2022-02-15 02:10:34,433 INFO L87 Difference]: Start difference. First operand 511 states and 605 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3)
[2022-02-15 02:10:35,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:10:35,629 INFO L93 Difference]: Finished difference Result 945 states and 1115 transitions.
[2022-02-15 02:10:35,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states.
[2022-02-15 02:10:35,629 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 75
[2022-02-15 02:10:35,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:10:35,630 INFO L225 Difference]: With dead ends: 945
[2022-02-15 02:10:35,630 INFO L226 Difference]: Without dead ends: 531
[2022-02-15 02:10:35,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 14 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=244, Invalid=568, Unknown=0, NotChecked=0, Total=812
[2022-02-15 02:10:35,631 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 99 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-02-15 02:10:35,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 29 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-02-15 02:10:35,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states.
[2022-02-15 02:10:36,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 523.
[2022-02-15 02:10:36,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 508 states have (on average 1.1811023622047243) internal successors, (600), 511 states have internal predecessors, (600), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:10:36,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 617 transitions.
[2022-02-15 02:10:36,582 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 617 transitions. Word has length 75
[2022-02-15 02:10:36,582 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:10:36,582 INFO L470 AbstractCegarLoop]: Abstraction has 523 states and 617 transitions.
[2022-02-15 02:10:36,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3)
[2022-02-15 02:10:36,582 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 617 transitions.
[2022-02-15 02:10:36,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77
[2022-02-15 02:10:36,583 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:10:36,583 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 17, 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 02:10:36,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151
[2022-02-15 02:10:36,583 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:10:36,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:10:36,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1182482172, now seen corresponding path program 137 times
[2022-02-15 02:10:36,583 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:10:36,583 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1607734305]
[2022-02-15 02:10:36,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:10:36,618 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:10:36,669 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:10:36,669 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:10:36,715 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:10:36,758 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:10:36,758 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:10:36,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:10:36,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:10:36,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:10:36,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:10:36,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:10:36,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:10:36,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:10:37,634 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:10:37,634 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1607734305]
[2022-02-15 02:10:37,634 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1607734305] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:10:37,634 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:10:37,634 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27
[2022-02-15 02:10:37,634 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391464098]
[2022-02-15 02:10:37,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:10:37,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states
[2022-02-15 02:10:37,635 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:10:37,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants.
[2022-02-15 02:10:37,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812
[2022-02-15 02:10:37,635 INFO L87 Difference]: Start difference. First operand 523 states and 617 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:10:40,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:10:40,180 INFO L93 Difference]: Finished difference Result 1093 states and 1266 transitions.
[2022-02-15 02:10:40,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states.
[2022-02-15 02:10:40,181 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 76
[2022-02-15 02:10:40,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:10:40,181 INFO L225 Difference]: With dead ends: 1093
[2022-02-15 02:10:40,181 INFO L226 Difference]: Without dead ends: 679
[2022-02-15 02:10:40,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 12 SyntacticMatches, 33 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992
[2022-02-15 02:10:40,183 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 50 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 1999 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 2012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time
[2022-02-15 02:10:40,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 60 Invalid, 2012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1999 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time]
[2022-02-15 02:10:40,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states.
[2022-02-15 02:10:41,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 532.
[2022-02-15 02:10:41,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 517 states have (on average 1.1779497098646035) internal successors, (609), 520 states have internal predecessors, (609), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:10:41,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 626 transitions.
[2022-02-15 02:10:41,213 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 626 transitions. Word has length 76
[2022-02-15 02:10:41,213 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:10:41,213 INFO L470 AbstractCegarLoop]: Abstraction has 532 states and 626 transitions.
[2022-02-15 02:10:41,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:10:41,213 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 626 transitions.
[2022-02-15 02:10:41,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77
[2022-02-15 02:10:41,214 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:10:41,214 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 16, 2, 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 02:10:41,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152
[2022-02-15 02:10:41,214 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:10:41,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:10:41,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1743181950, now seen corresponding path program 138 times
[2022-02-15 02:10:41,214 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:10:41,214 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [81768596]
[2022-02-15 02:10:41,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:10:41,263 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:10:41,318 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:10:41,318 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:10:41,361 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:10:41,413 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:10:41,413 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:10:41,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:10:41,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:10:41,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:10:41,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:10:41,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:10:41,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:10:41,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:10:42,280 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:10:42,280 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [81768596]
[2022-02-15 02:10:42,280 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [81768596] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:10:42,280 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:10:42,280 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28
[2022-02-15 02:10:42,280 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798555600]
[2022-02-15 02:10:42,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:10:42,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states
[2022-02-15 02:10:42,281 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:10:42,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants.
[2022-02-15 02:10:42,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870
[2022-02-15 02:10:42,281 INFO L87 Difference]: Start difference. First operand 532 states and 626 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:10:44,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:10:44,961 INFO L93 Difference]: Finished difference Result 1111 states and 1284 transitions.
[2022-02-15 02:10:44,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states.
[2022-02-15 02:10:44,961 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 76
[2022-02-15 02:10:44,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:10:44,962 INFO L225 Difference]: With dead ends: 1111
[2022-02-15 02:10:44,962 INFO L226 Difference]: Without dead ends: 688
[2022-02-15 02:10:44,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 12 SyntacticMatches, 32 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056
[2022-02-15 02:10:44,963 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 51 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 2039 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 2053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 2039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time
[2022-02-15 02:10:44,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 68 Invalid, 2053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 2039 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time]
[2022-02-15 02:10:44,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states.
[2022-02-15 02:10:46,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 532.
[2022-02-15 02:10:46,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 517 states have (on average 1.1779497098646035) internal successors, (609), 520 states have internal predecessors, (609), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:10:46,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 626 transitions.
[2022-02-15 02:10:46,036 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 626 transitions. Word has length 76
[2022-02-15 02:10:46,036 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:10:46,036 INFO L470 AbstractCegarLoop]: Abstraction has 532 states and 626 transitions.
[2022-02-15 02:10:46,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:10:46,036 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 626 transitions.
[2022-02-15 02:10:46,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77
[2022-02-15 02:10:46,036 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:10:46,036 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 15, 3, 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 02:10:46,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153
[2022-02-15 02:10:46,036 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:10:46,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:10:46,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1783856700, now seen corresponding path program 139 times
[2022-02-15 02:10:46,037 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:10:46,037 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [267334596]
[2022-02-15 02:10:46,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:10:46,072 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:10:46,116 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:10:46,116 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:10:46,152 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:10:46,194 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:10:46,194 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:10:46,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:10:46,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:10:46,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:10:46,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:10:46,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:10:46,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:10:46,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:10:47,059 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:10:47,059 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [267334596]
[2022-02-15 02:10:47,059 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [267334596] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:10:47,059 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:10:47,059 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29
[2022-02-15 02:10:47,059 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785294702]
[2022-02-15 02:10:47,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:10:47,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states
[2022-02-15 02:10:47,059 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:10:47,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants.
[2022-02-15 02:10:47,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930
[2022-02-15 02:10:47,060 INFO L87 Difference]: Start difference. First operand 532 states and 626 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:10:49,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:10:49,814 INFO L93 Difference]: Finished difference Result 1102 states and 1275 transitions.
[2022-02-15 02:10:49,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states.
[2022-02-15 02:10:49,814 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 76
[2022-02-15 02:10:49,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:10:49,815 INFO L225 Difference]: With dead ends: 1102
[2022-02-15 02:10:49,815 INFO L226 Difference]: Without dead ends: 679
[2022-02-15 02:10:49,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 12 SyntacticMatches, 31 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=133, Invalid=989, Unknown=0, NotChecked=0, Total=1122
[2022-02-15 02:10:49,816 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 52 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 2234 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 2249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 2234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time
[2022-02-15 02:10:49,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 71 Invalid, 2249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 2234 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time]
[2022-02-15 02:10:49,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states.
[2022-02-15 02:10:50,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 532.
[2022-02-15 02:10:50,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 517 states have (on average 1.1779497098646035) internal successors, (609), 520 states have internal predecessors, (609), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:10:50,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 626 transitions.
[2022-02-15 02:10:50,906 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 626 transitions. Word has length 76
[2022-02-15 02:10:50,906 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:10:50,906 INFO L470 AbstractCegarLoop]: Abstraction has 532 states and 626 transitions.
[2022-02-15 02:10:50,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:10:50,906 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 626 transitions.
[2022-02-15 02:10:50,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77
[2022-02-15 02:10:50,906 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:10:50,906 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 14, 4, 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 02:10:50,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154
[2022-02-15 02:10:50,906 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:10:50,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:10:50,907 INFO L85 PathProgramCache]: Analyzing trace with hash -2067209922, now seen corresponding path program 140 times
[2022-02-15 02:10:50,907 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:10:50,907 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1527735968]
[2022-02-15 02:10:50,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:10:50,954 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:10:50,996 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:10:50,997 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:10:51,030 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:10:51,072 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:10:51,073 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:10:51,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:10:51,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:10:51,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:10:51,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:10:51,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:10:51,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:10:51,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:10:51,949 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:10:51,950 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1527735968]
[2022-02-15 02:10:51,950 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1527735968] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:10:51,950 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:10:51,950 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30
[2022-02-15 02:10:51,950 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193603137]
[2022-02-15 02:10:51,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:10:51,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states
[2022-02-15 02:10:51,950 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:10:51,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants.
[2022-02-15 02:10:51,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=876, Unknown=0, NotChecked=0, Total=992
[2022-02-15 02:10:51,950 INFO L87 Difference]: Start difference. First operand 532 states and 626 transitions. Second operand has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:10:54,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:10:54,718 INFO L93 Difference]: Finished difference Result 1093 states and 1266 transitions.
[2022-02-15 02:10:54,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states.
[2022-02-15 02:10:54,718 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 76
[2022-02-15 02:10:54,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:10:54,719 INFO L225 Difference]: With dead ends: 1093
[2022-02-15 02:10:54,719 INFO L226 Difference]: Without dead ends: 670
[2022-02-15 02:10:54,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 12 SyntacticMatches, 30 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=143, Invalid=1047, Unknown=0, NotChecked=0, Total=1190
[2022-02-15 02:10:54,721 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 63 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 2232 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 2248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 2232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time
[2022-02-15 02:10:54,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 59 Invalid, 2248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 2232 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time]
[2022-02-15 02:10:54,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states.
[2022-02-15 02:10:55,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 532.
[2022-02-15 02:10:55,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 517 states have (on average 1.1779497098646035) internal successors, (609), 520 states have internal predecessors, (609), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:10:55,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 626 transitions.
[2022-02-15 02:10:55,837 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 626 transitions. Word has length 76
[2022-02-15 02:10:55,837 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:10:55,837 INFO L470 AbstractCegarLoop]: Abstraction has 532 states and 626 transitions.
[2022-02-15 02:10:55,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:10:55,838 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 626 transitions.
[2022-02-15 02:10:55,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77
[2022-02-15 02:10:55,838 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:10:55,838 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 13, 5, 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 02:10:55,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155
[2022-02-15 02:10:55,838 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:10:55,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:10:55,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1746677116, now seen corresponding path program 141 times
[2022-02-15 02:10:55,838 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:10:55,838 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [851019431]
[2022-02-15 02:10:55,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:10:55,885 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:10:55,928 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:10:55,928 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:10:55,962 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:10:56,005 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:10:56,005 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:10:56,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:10:56,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:10:56,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:10:56,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:10:56,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:10:56,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:10:56,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:10:56,901 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:10:56,901 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [851019431]
[2022-02-15 02:10:56,901 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [851019431] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:10:56,901 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:10:56,901 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31
[2022-02-15 02:10:56,901 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595775121]
[2022-02-15 02:10:56,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:10:56,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states
[2022-02-15 02:10:56,901 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:10:56,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants.
[2022-02-15 02:10:56,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056
[2022-02-15 02:10:56,902 INFO L87 Difference]: Start difference. First operand 532 states and 626 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:10:59,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:10:59,536 INFO L93 Difference]: Finished difference Result 1084 states and 1257 transitions.
[2022-02-15 02:10:59,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states.
[2022-02-15 02:10:59,536 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 76
[2022-02-15 02:10:59,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:10:59,537 INFO L225 Difference]: With dead ends: 1084
[2022-02-15 02:10:59,537 INFO L226 Difference]: Without dead ends: 661
[2022-02-15 02:10:59,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 12 SyntacticMatches, 29 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 769 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=153, Invalid=1107, Unknown=0, NotChecked=0, Total=1260
[2022-02-15 02:10:59,538 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 62 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 2099 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 2116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 2099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time
[2022-02-15 02:10:59,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 65 Invalid, 2116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 2099 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time]
[2022-02-15 02:10:59,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states.
[2022-02-15 02:11:00,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 532.
[2022-02-15 02:11:00,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 517 states have (on average 1.1779497098646035) internal successors, (609), 520 states have internal predecessors, (609), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:11:00,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 626 transitions.
[2022-02-15 02:11:00,666 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 626 transitions. Word has length 76
[2022-02-15 02:11:00,666 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:11:00,666 INFO L470 AbstractCegarLoop]: Abstraction has 532 states and 626 transitions.
[2022-02-15 02:11:00,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:11:00,667 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 626 transitions.
[2022-02-15 02:11:00,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77
[2022-02-15 02:11:00,667 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:11:00,667 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 12, 6, 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 02:11:00,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156
[2022-02-15 02:11:00,667 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:11:00,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:11:00,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1393588734, now seen corresponding path program 142 times
[2022-02-15 02:11:00,667 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:11:00,667 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [987283114]
[2022-02-15 02:11:00,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:11:00,703 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:11:00,735 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:11:00,736 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:11:00,781 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:11:00,813 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:11:00,814 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:11:00,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:11:00,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:11:00,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:11:00,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:11:00,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:11:00,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:11:00,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:11:01,697 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:11:01,697 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [987283114]
[2022-02-15 02:11:01,697 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [987283114] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:11:01,697 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:11:01,697 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32
[2022-02-15 02:11:01,697 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16547039]
[2022-02-15 02:11:01,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:11:01,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states
[2022-02-15 02:11:01,697 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:11:01,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants.
[2022-02-15 02:11:01,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122
[2022-02-15 02:11:01,698 INFO L87 Difference]: Start difference. First operand 532 states and 626 transitions. Second operand has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:11:04,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:11:04,356 INFO L93 Difference]: Finished difference Result 1075 states and 1248 transitions.
[2022-02-15 02:11:04,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states.
[2022-02-15 02:11:04,357 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 76
[2022-02-15 02:11:04,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:11:04,358 INFO L225 Difference]: With dead ends: 1075
[2022-02-15 02:11:04,358 INFO L226 Difference]: Without dead ends: 652
[2022-02-15 02:11:04,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 12 SyntacticMatches, 28 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 829 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=163, Invalid=1169, Unknown=0, NotChecked=0, Total=1332
[2022-02-15 02:11:04,358 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 58 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 2382 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 2400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 2382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time
[2022-02-15 02:11:04,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 75 Invalid, 2400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 2382 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time]
[2022-02-15 02:11:04,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states.
[2022-02-15 02:11:05,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 532.
[2022-02-15 02:11:05,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 517 states have (on average 1.1779497098646035) internal successors, (609), 520 states have internal predecessors, (609), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:11:05,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 626 transitions.
[2022-02-15 02:11:05,497 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 626 transitions. Word has length 76
[2022-02-15 02:11:05,497 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:11:05,497 INFO L470 AbstractCegarLoop]: Abstraction has 532 states and 626 transitions.
[2022-02-15 02:11:05,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:11:05,497 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 626 transitions.
[2022-02-15 02:11:05,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77
[2022-02-15 02:11:05,497 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:11:05,497 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 11, 7, 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 02:11:05,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157
[2022-02-15 02:11:05,497 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:11:05,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:11:05,498 INFO L85 PathProgramCache]: Analyzing trace with hash -655799108, now seen corresponding path program 143 times
[2022-02-15 02:11:05,498 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:11:05,498 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [613400877]
[2022-02-15 02:11:05,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:11:05,532 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:11:05,576 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:11:05,576 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:11:05,622 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:11:05,664 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:11:05,664 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:11:05,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:11:05,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:11:05,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:11:05,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:11:05,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:11:05,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:11:05,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:11:06,561 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:11:06,561 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [613400877]
[2022-02-15 02:11:06,561 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [613400877] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:11:06,561 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:11:06,562 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33
[2022-02-15 02:11:06,562 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503650373]
[2022-02-15 02:11:06,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:11:06,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states
[2022-02-15 02:11:06,562 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:11:06,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants.
[2022-02-15 02:11:06,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1111, Unknown=0, NotChecked=0, Total=1260
[2022-02-15 02:11:06,562 INFO L87 Difference]: Start difference. First operand 532 states and 626 transitions. Second operand has 33 states, 33 states have (on average 2.121212121212121) internal successors, (70), 32 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:11:09,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:11:09,157 INFO L93 Difference]: Finished difference Result 1072 states and 1241 transitions.
[2022-02-15 02:11:09,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states.
[2022-02-15 02:11:09,157 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.121212121212121) internal successors, (70), 32 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 76
[2022-02-15 02:11:09,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:11:09,158 INFO L225 Difference]: With dead ends: 1072
[2022-02-15 02:11:09,158 INFO L226 Difference]: Without dead ends: 649
[2022-02-15 02:11:09,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 12 SyntacticMatches, 27 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 923 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=172, Invalid=1234, Unknown=0, NotChecked=0, Total=1406
[2022-02-15 02:11:09,160 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 67 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 2014 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 2033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 2014 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time
[2022-02-15 02:11:09,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 52 Invalid, 2033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 2014 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time]
[2022-02-15 02:11:09,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states.
[2022-02-15 02:11:10,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 532.
[2022-02-15 02:11:10,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 517 states have (on average 1.1779497098646035) internal successors, (609), 520 states have internal predecessors, (609), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:11:10,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 626 transitions.
[2022-02-15 02:11:10,319 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 626 transitions. Word has length 76
[2022-02-15 02:11:10,320 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:11:10,320 INFO L470 AbstractCegarLoop]: Abstraction has 532 states and 626 transitions.
[2022-02-15 02:11:10,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.121212121212121) internal successors, (70), 32 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:11:10,320 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 626 transitions.
[2022-02-15 02:11:10,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77
[2022-02-15 02:11:10,320 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:11:10,320 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 10, 8, 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 02:11:10,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158
[2022-02-15 02:11:10,320 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:11:10,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:11:10,320 INFO L85 PathProgramCache]: Analyzing trace with hash -232152386, now seen corresponding path program 144 times
[2022-02-15 02:11:10,320 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:11:10,321 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [764470853]
[2022-02-15 02:11:10,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:11:10,367 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:11:10,409 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:11:10,410 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:11:10,455 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:11:10,498 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:11:10,498 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:11:10,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:11:10,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:11:10,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:11:10,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:11:10,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:11:10,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:11:10,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:11:11,409 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:11:11,409 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [764470853]
[2022-02-15 02:11:11,409 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [764470853] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:11:11,409 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:11:11,409 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34
[2022-02-15 02:11:11,409 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108745472]
[2022-02-15 02:11:11,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:11:11,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states
[2022-02-15 02:11:11,409 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:11:11,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants.
[2022-02-15 02:11:11,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1112, Unknown=0, NotChecked=0, Total=1260
[2022-02-15 02:11:11,410 INFO L87 Difference]: Start difference. First operand 532 states and 626 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:11:13,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:11:13,871 INFO L93 Difference]: Finished difference Result 1057 states and 1230 transitions.
[2022-02-15 02:11:13,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states.
[2022-02-15 02:11:13,872 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 76
[2022-02-15 02:11:13,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:11:13,872 INFO L225 Difference]: With dead ends: 1057
[2022-02-15 02:11:13,872 INFO L226 Difference]: Without dead ends: 634
[2022-02-15 02:11:13,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 12 SyntacticMatches, 26 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 922 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=183, Invalid=1299, Unknown=0, NotChecked=0, Total=1482
[2022-02-15 02:11:13,873 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 66 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 2170 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 2190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 2170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time
[2022-02-15 02:11:13,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 68 Invalid, 2190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 2170 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time]
[2022-02-15 02:11:13,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states.
[2022-02-15 02:11:15,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 532.
[2022-02-15 02:11:15,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 517 states have (on average 1.1779497098646035) internal successors, (609), 520 states have internal predecessors, (609), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:11:15,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 626 transitions.
[2022-02-15 02:11:15,018 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 626 transitions. Word has length 76
[2022-02-15 02:11:15,018 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:11:15,018 INFO L470 AbstractCegarLoop]: Abstraction has 532 states and 626 transitions.
[2022-02-15 02:11:15,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:11:15,018 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 626 transitions.
[2022-02-15 02:11:15,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77
[2022-02-15 02:11:15,019 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:11:15,019 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 9, 9, 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 02:11:15,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159
[2022-02-15 02:11:15,019 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:11:15,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:11:15,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1261511684, now seen corresponding path program 145 times
[2022-02-15 02:11:15,019 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:11:15,019 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [191206773]
[2022-02-15 02:11:15,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:11:15,066 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:11:15,099 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:11:15,099 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:11:15,133 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:11:15,178 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:11:15,178 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:11:15,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:11:15,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:11:15,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:11:15,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:11:15,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:11:15,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:11:15,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:11:16,147 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:11:16,147 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [191206773]
[2022-02-15 02:11:16,147 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [191206773] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:11:16,147 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:11:16,147 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35
[2022-02-15 02:11:16,147 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200234707]
[2022-02-15 02:11:16,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:11:16,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states
[2022-02-15 02:11:16,147 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:11:16,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants.
[2022-02-15 02:11:16,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1176, Unknown=0, NotChecked=0, Total=1332
[2022-02-15 02:11:16,148 INFO L87 Difference]: Start difference. First operand 532 states and 626 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:11:18,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:11:18,475 INFO L93 Difference]: Finished difference Result 1048 states and 1221 transitions.
[2022-02-15 02:11:18,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states.
[2022-02-15 02:11:18,476 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 76
[2022-02-15 02:11:18,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:11:18,476 INFO L225 Difference]: With dead ends: 1048
[2022-02-15 02:11:18,476 INFO L226 Difference]: Without dead ends: 625
[2022-02-15 02:11:18,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 12 SyntacticMatches, 25 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 955 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=193, Invalid=1367, Unknown=0, NotChecked=0, Total=1560
[2022-02-15 02:11:18,477 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 81 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 1972 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time
[2022-02-15 02:11:18,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 50 Invalid, 1993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1972 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time]
[2022-02-15 02:11:18,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states.
[2022-02-15 02:11:19,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 532.
[2022-02-15 02:11:19,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 517 states have (on average 1.1779497098646035) internal successors, (609), 520 states have internal predecessors, (609), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:11:19,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 626 transitions.
[2022-02-15 02:11:19,635 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 626 transitions. Word has length 76
[2022-02-15 02:11:19,635 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:11:19,635 INFO L470 AbstractCegarLoop]: Abstraction has 532 states and 626 transitions.
[2022-02-15 02:11:19,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:11:19,635 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 626 transitions.
[2022-02-15 02:11:19,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77
[2022-02-15 02:11:19,636 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:11:19,636 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 10, 8, 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 02:11:19,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160
[2022-02-15 02:11:19,636 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:11:19,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:11:19,636 INFO L85 PathProgramCache]: Analyzing trace with hash -2105517186, now seen corresponding path program 146 times
[2022-02-15 02:11:19,636 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:11:19,636 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1796488786]
[2022-02-15 02:11:19,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:11:19,671 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:11:19,714 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:11:19,715 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:11:19,749 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:11:19,790 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:11:19,791 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:11:19,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:11:19,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:11:19,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:11:19,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:11:19,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:11:19,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:11:19,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:11:20,707 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:11:20,708 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1796488786]
[2022-02-15 02:11:20,708 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1796488786] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:11:20,708 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:11:20,708 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36
[2022-02-15 02:11:20,708 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383948278]
[2022-02-15 02:11:20,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:11:20,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states
[2022-02-15 02:11:20,708 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:11:20,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants.
[2022-02-15 02:11:20,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1242, Unknown=0, NotChecked=0, Total=1406
[2022-02-15 02:11:20,709 INFO L87 Difference]: Start difference. First operand 532 states and 626 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:11:23,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:11:23,205 INFO L93 Difference]: Finished difference Result 1039 states and 1212 transitions.
[2022-02-15 02:11:23,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states.
[2022-02-15 02:11:23,205 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 76
[2022-02-15 02:11:23,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:11:23,206 INFO L225 Difference]: With dead ends: 1039
[2022-02-15 02:11:23,206 INFO L226 Difference]: Without dead ends: 616
[2022-02-15 02:11:23,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 12 SyntacticMatches, 24 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 979 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=203, Invalid=1437, Unknown=0, NotChecked=0, Total=1640
[2022-02-15 02:11:23,206 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 67 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 2680 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 2702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 2680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time
[2022-02-15 02:11:23,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 72 Invalid, 2702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 2680 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time]
[2022-02-15 02:11:23,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states.
[2022-02-15 02:11:24,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 532.
[2022-02-15 02:11:24,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 517 states have (on average 1.1779497098646035) internal successors, (609), 520 states have internal predecessors, (609), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:11:24,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 626 transitions.
[2022-02-15 02:11:24,380 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 626 transitions. Word has length 76
[2022-02-15 02:11:24,380 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:11:24,380 INFO L470 AbstractCegarLoop]: Abstraction has 532 states and 626 transitions.
[2022-02-15 02:11:24,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:11:24,380 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 626 transitions.
[2022-02-15 02:11:24,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77
[2022-02-15 02:11:24,380 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:11:24,380 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 11, 7, 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 02:11:24,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161
[2022-02-15 02:11:24,381 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:11:24,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:11:24,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1830757572, now seen corresponding path program 147 times
[2022-02-15 02:11:24,381 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:11:24,381 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [790520630]
[2022-02-15 02:11:24,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:11:24,416 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:11:24,458 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:11:24,458 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:11:24,504 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:11:24,546 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:11:24,546 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:11:24,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:11:24,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:11:24,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:11:24,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:11:24,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:11:24,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:11:24,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:11:25,499 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:11:25,499 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [790520630]
[2022-02-15 02:11:25,499 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [790520630] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:11:25,499 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:11:25,500 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37
[2022-02-15 02:11:25,500 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203901934]
[2022-02-15 02:11:25,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:11:25,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states
[2022-02-15 02:11:25,500 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:11:25,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants.
[2022-02-15 02:11:25,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1310, Unknown=0, NotChecked=0, Total=1482
[2022-02-15 02:11:25,500 INFO L87 Difference]: Start difference. First operand 532 states and 626 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:11:27,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:11:27,975 INFO L93 Difference]: Finished difference Result 1030 states and 1203 transitions.
[2022-02-15 02:11:27,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states.
[2022-02-15 02:11:27,976 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 76
[2022-02-15 02:11:27,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:11:27,976 INFO L225 Difference]: With dead ends: 1030
[2022-02-15 02:11:27,976 INFO L226 Difference]: Without dead ends: 607
[2022-02-15 02:11:27,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 12 SyntacticMatches, 23 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=213, Invalid=1509, Unknown=0, NotChecked=0, Total=1722
[2022-02-15 02:11:27,977 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 75 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 2894 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 2917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 2894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time
[2022-02-15 02:11:27,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 78 Invalid, 2917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 2894 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time]
[2022-02-15 02:11:27,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states.
[2022-02-15 02:11:29,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 532.
[2022-02-15 02:11:29,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 517 states have (on average 1.1779497098646035) internal successors, (609), 520 states have internal predecessors, (609), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:11:29,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 626 transitions.
[2022-02-15 02:11:29,155 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 626 transitions. Word has length 76
[2022-02-15 02:11:29,155 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:11:29,155 INFO L470 AbstractCegarLoop]: Abstraction has 532 states and 626 transitions.
[2022-02-15 02:11:29,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:11:29,155 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 626 transitions.
[2022-02-15 02:11:29,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77
[2022-02-15 02:11:29,156 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:11:29,156 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 12, 6, 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 02:11:29,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162
[2022-02-15 02:11:29,156 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:11:29,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:11:29,156 INFO L85 PathProgramCache]: Analyzing trace with hash -444554178, now seen corresponding path program 148 times
[2022-02-15 02:11:29,156 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:11:29,156 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1703058748]
[2022-02-15 02:11:29,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:11:29,191 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:11:29,233 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:11:29,233 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:11:29,279 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:11:29,311 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:11:29,311 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:11:29,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:11:29,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:11:29,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:11:29,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:11:29,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:11:29,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:11:29,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:11:30,275 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:11:30,275 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1703058748]
[2022-02-15 02:11:30,275 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1703058748] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:11:30,275 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:11:30,275 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38
[2022-02-15 02:11:30,275 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198724644]
[2022-02-15 02:11:30,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:11:30,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states
[2022-02-15 02:11:30,276 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:11:30,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants.
[2022-02-15 02:11:30,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1380, Unknown=0, NotChecked=0, Total=1560
[2022-02-15 02:11:30,276 INFO L87 Difference]: Start difference. First operand 532 states and 626 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:11:32,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:11:32,618 INFO L93 Difference]: Finished difference Result 1021 states and 1194 transitions.
[2022-02-15 02:11:32,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states.
[2022-02-15 02:11:32,619 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 76
[2022-02-15 02:11:32,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:11:32,619 INFO L225 Difference]: With dead ends: 1021
[2022-02-15 02:11:32,619 INFO L226 Difference]: Without dead ends: 598
[2022-02-15 02:11:32,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 12 SyntacticMatches, 22 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1000 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=223, Invalid=1583, Unknown=0, NotChecked=0, Total=1806
[2022-02-15 02:11:32,620 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 86 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 2642 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 2666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 2642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time
[2022-02-15 02:11:32,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 56 Invalid, 2666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 2642 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time]
[2022-02-15 02:11:32,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states.
[2022-02-15 02:11:33,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 532.
[2022-02-15 02:11:33,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 517 states have (on average 1.1779497098646035) internal successors, (609), 520 states have internal predecessors, (609), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:11:33,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 626 transitions.
[2022-02-15 02:11:33,784 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 626 transitions. Word has length 76
[2022-02-15 02:11:33,784 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:11:33,784 INFO L470 AbstractCegarLoop]: Abstraction has 532 states and 626 transitions.
[2022-02-15 02:11:33,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:11:33,785 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 626 transitions.
[2022-02-15 02:11:33,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77
[2022-02-15 02:11:33,785 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:11:33,785 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 13, 5, 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 02:11:33,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163
[2022-02-15 02:11:33,785 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:11:33,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:11:33,785 INFO L85 PathProgramCache]: Analyzing trace with hash -382514564, now seen corresponding path program 149 times
[2022-02-15 02:11:33,785 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:11:33,785 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [786341556]
[2022-02-15 02:11:33,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:11:33,820 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:11:33,863 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:11:33,864 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:11:33,898 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:11:33,939 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:11:33,939 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:11:33,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:11:33,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:11:33,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:11:33,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:11:33,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:11:33,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:11:33,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:11:34,980 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:11:34,980 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [786341556]
[2022-02-15 02:11:34,980 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [786341556] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:11:34,980 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:11:34,980 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39
[2022-02-15 02:11:34,980 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013500508]
[2022-02-15 02:11:34,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:11:34,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states
[2022-02-15 02:11:34,981 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:11:34,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants.
[2022-02-15 02:11:34,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1452, Unknown=0, NotChecked=0, Total=1640
[2022-02-15 02:11:34,981 INFO L87 Difference]: Start difference. First operand 532 states and 626 transitions. Second operand has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:11:37,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:11:37,160 INFO L93 Difference]: Finished difference Result 1012 states and 1185 transitions.
[2022-02-15 02:11:37,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states.
[2022-02-15 02:11:37,161 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 76
[2022-02-15 02:11:37,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:11:37,161 INFO L225 Difference]: With dead ends: 1012
[2022-02-15 02:11:37,161 INFO L226 Difference]: Without dead ends: 589
[2022-02-15 02:11:37,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 12 SyntacticMatches, 21 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 997 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=233, Invalid=1659, Unknown=0, NotChecked=0, Total=1892
[2022-02-15 02:11:37,162 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 94 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 2282 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 2307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 2282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time
[2022-02-15 02:11:37,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 48 Invalid, 2307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 2282 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time]
[2022-02-15 02:11:37,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states.
[2022-02-15 02:11:38,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 532.
[2022-02-15 02:11:38,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 517 states have (on average 1.1779497098646035) internal successors, (609), 520 states have internal predecessors, (609), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:11:38,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 626 transitions.
[2022-02-15 02:11:38,328 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 626 transitions. Word has length 76
[2022-02-15 02:11:38,328 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:11:38,328 INFO L470 AbstractCegarLoop]: Abstraction has 532 states and 626 transitions.
[2022-02-15 02:11:38,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:11:38,328 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 626 transitions.
[2022-02-15 02:11:38,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77
[2022-02-15 02:11:38,328 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:11:38,328 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 14, 4, 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 02:11:38,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164
[2022-02-15 02:11:38,329 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:11:38,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:11:38,329 INFO L85 PathProgramCache]: Analyzing trace with hash 2107014398, now seen corresponding path program 150 times
[2022-02-15 02:11:38,329 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:11:38,329 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2014239857]
[2022-02-15 02:11:38,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:11:38,376 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:11:38,419 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:11:38,419 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:11:38,465 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:11:38,497 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:11:38,497 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:11:38,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:11:38,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:11:38,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:11:38,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:11:38,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:11:38,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:11:38,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:11:39,471 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:11:39,471 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2014239857]
[2022-02-15 02:11:39,471 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2014239857] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:11:39,471 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:11:39,471 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40
[2022-02-15 02:11:39,472 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103620045]
[2022-02-15 02:11:39,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:11:39,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states
[2022-02-15 02:11:39,472 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:11:39,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants.
[2022-02-15 02:11:39,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1601, Unknown=0, NotChecked=0, Total=1806
[2022-02-15 02:11:39,472 INFO L87 Difference]: Start difference. First operand 532 states and 626 transitions. Second operand has 40 states, 40 states have (on average 1.75) internal successors, (70), 39 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:11:42,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:11:42,056 INFO L93 Difference]: Finished difference Result 1030 states and 1199 transitions.
[2022-02-15 02:11:42,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states.
[2022-02-15 02:11:42,056 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.75) internal successors, (70), 39 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 76
[2022-02-15 02:11:42,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:11:42,057 INFO L225 Difference]: With dead ends: 1030
[2022-02-15 02:11:42,057 INFO L226 Difference]: Without dead ends: 607
[2022-02-15 02:11:42,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 12 SyntacticMatches, 20 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1014 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=242, Invalid=1738, Unknown=0, NotChecked=0, Total=1980
[2022-02-15 02:11:42,058 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 100 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 2720 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 2749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 2720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time
[2022-02-15 02:11:42,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 55 Invalid, 2749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 2720 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time]
[2022-02-15 02:11:42,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states.
[2022-02-15 02:11:43,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 532.
[2022-02-15 02:11:43,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 517 states have (on average 1.1779497098646035) internal successors, (609), 520 states have internal predecessors, (609), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:11:43,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 626 transitions.
[2022-02-15 02:11:43,245 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 626 transitions. Word has length 76
[2022-02-15 02:11:43,245 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:11:43,246 INFO L470 AbstractCegarLoop]: Abstraction has 532 states and 626 transitions.
[2022-02-15 02:11:43,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.75) internal successors, (70), 39 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:11:43,246 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 626 transitions.
[2022-02-15 02:11:43,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77
[2022-02-15 02:11:43,246 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:11:43,246 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 15, 3, 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 02:11:43,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165
[2022-02-15 02:11:43,246 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:11:43,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:11:43,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1289365948, now seen corresponding path program 151 times
[2022-02-15 02:11:43,247 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:11:43,247 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [876806633]
[2022-02-15 02:11:43,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:11:43,293 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:11:43,337 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:11:43,337 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:11:43,371 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:11:43,403 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:11:43,404 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:11:43,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:11:43,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:11:43,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:11:43,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:11:43,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:11:43,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:11:43,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:11:44,392 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:11:44,392 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [876806633]
[2022-02-15 02:11:44,392 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [876806633] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:11:44,392 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:11:44,392 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41
[2022-02-15 02:11:44,392 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512976869]
[2022-02-15 02:11:44,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:11:44,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states
[2022-02-15 02:11:44,392 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:11:44,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants.
[2022-02-15 02:11:44,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1679, Unknown=0, NotChecked=0, Total=1892
[2022-02-15 02:11:44,393 INFO L87 Difference]: Start difference. First operand 532 states and 626 transitions. Second operand has 41 states, 41 states have (on average 1.7073170731707317) internal successors, (70), 40 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:11:47,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:11:47,069 INFO L93 Difference]: Finished difference Result 1024 states and 1193 transitions.
[2022-02-15 02:11:47,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states.
[2022-02-15 02:11:47,071 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.7073170731707317) internal successors, (70), 40 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 76
[2022-02-15 02:11:47,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:11:47,072 INFO L225 Difference]: With dead ends: 1024
[2022-02-15 02:11:47,072 INFO L226 Difference]: Without dead ends: 601
[2022-02-15 02:11:47,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 12 SyntacticMatches, 19 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=252, Invalid=1818, Unknown=0, NotChecked=0, Total=2070
[2022-02-15 02:11:47,073 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 96 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 3059 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 3088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 3059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time
[2022-02-15 02:11:47,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 65 Invalid, 3088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 3059 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time]
[2022-02-15 02:11:47,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states.
[2022-02-15 02:11:48,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 532.
[2022-02-15 02:11:48,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 517 states have (on average 1.1779497098646035) internal successors, (609), 520 states have internal predecessors, (609), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:11:48,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 626 transitions.
[2022-02-15 02:11:48,285 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 626 transitions. Word has length 76
[2022-02-15 02:11:48,286 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:11:48,286 INFO L470 AbstractCegarLoop]: Abstraction has 532 states and 626 transitions.
[2022-02-15 02:11:48,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.7073170731707317) internal successors, (70), 40 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:11:48,286 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 626 transitions.
[2022-02-15 02:11:48,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77
[2022-02-15 02:11:48,286 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:11:48,286 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 16, 2, 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 02:11:48,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166
[2022-02-15 02:11:48,286 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:11:48,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:11:48,286 INFO L85 PathProgramCache]: Analyzing trace with hash -298981954, now seen corresponding path program 152 times
[2022-02-15 02:11:48,286 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:11:48,287 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1017246231]
[2022-02-15 02:11:48,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:11:48,321 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:11:48,364 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:11:48,364 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:11:48,410 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:11:48,442 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:11:48,442 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:11:48,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:11:48,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:11:48,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:11:48,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:11:48,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:11:48,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:11:48,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:11:49,469 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:11:49,469 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1017246231]
[2022-02-15 02:11:49,469 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1017246231] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:11:49,469 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:11:49,469 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42
[2022-02-15 02:11:49,469 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841340246]
[2022-02-15 02:11:49,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:11:49,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states
[2022-02-15 02:11:49,470 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:11:49,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants.
[2022-02-15 02:11:49,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1680, Unknown=0, NotChecked=0, Total=1892
[2022-02-15 02:11:49,470 INFO L87 Difference]: Start difference. First operand 532 states and 626 transitions. Second operand has 42 states, 42 states have (on average 1.6666666666666667) internal successors, (70), 41 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:11:51,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:11:51,790 INFO L93 Difference]: Finished difference Result 989 states and 1162 transitions.
[2022-02-15 02:11:51,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states.
[2022-02-15 02:11:51,790 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.6666666666666667) internal successors, (70), 41 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 76
[2022-02-15 02:11:51,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:11:51,791 INFO L225 Difference]: With dead ends: 989
[2022-02-15 02:11:51,791 INFO L226 Difference]: Without dead ends: 566
[2022-02-15 02:11:51,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 12 SyntacticMatches, 18 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 934 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=263, Invalid=1899, Unknown=0, NotChecked=0, Total=2162
[2022-02-15 02:11:51,791 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 80 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 3001 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 3029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 3001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time
[2022-02-15 02:11:51,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 79 Invalid, 3029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 3001 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time]
[2022-02-15 02:11:51,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states.
[2022-02-15 02:11:52,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 532.
[2022-02-15 02:11:52,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 517 states have (on average 1.1779497098646035) internal successors, (609), 520 states have internal predecessors, (609), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:11:52,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 626 transitions.
[2022-02-15 02:11:52,981 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 626 transitions. Word has length 76
[2022-02-15 02:11:52,981 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:11:52,981 INFO L470 AbstractCegarLoop]: Abstraction has 532 states and 626 transitions.
[2022-02-15 02:11:52,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.6666666666666667) internal successors, (70), 41 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:11:52,981 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 626 transitions.
[2022-02-15 02:11:52,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77
[2022-02-15 02:11:52,982 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:11:52,982 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 17, 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 02:11:52,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167
[2022-02-15 02:11:52,982 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:11:52,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:11:52,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1310099204, now seen corresponding path program 153 times
[2022-02-15 02:11:52,982 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:11:52,982 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2021410135]
[2022-02-15 02:11:52,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:11:53,027 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:11:53,027 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE
[2022-02-15 02:11:53,073 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:11:53,115 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:11:53,115 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:11:53,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:11:53,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:11:53,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:11:53,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:11:53,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:11:53,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:11:53,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:11:54,162 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:11:54,162 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2021410135]
[2022-02-15 02:11:54,162 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2021410135] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:11:54,162 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:11:54,162 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43
[2022-02-15 02:11:54,162 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822075088]
[2022-02-15 02:11:54,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:11:54,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states
[2022-02-15 02:11:54,162 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:11:54,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants.
[2022-02-15 02:11:54,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1760, Unknown=0, NotChecked=0, Total=1980
[2022-02-15 02:11:54,163 INFO L87 Difference]: Start difference. First operand 532 states and 626 transitions. Second operand has 43 states, 43 states have (on average 1.627906976744186) internal successors, (70), 42 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:11:56,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:11:56,282 INFO L93 Difference]: Finished difference Result 1003 states and 1186 transitions.
[2022-02-15 02:11:56,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states.
[2022-02-15 02:11:56,282 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.627906976744186) internal successors, (70), 42 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 76
[2022-02-15 02:11:56,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:11:56,283 INFO L225 Difference]: With dead ends: 1003
[2022-02-15 02:11:56,283 INFO L226 Difference]: Without dead ends: 569
[2022-02-15 02:11:56,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 12 SyntacticMatches, 17 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=273, Invalid=1983, Unknown=0, NotChecked=0, Total=2256
[2022-02-15 02:11:56,284 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 101 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 2509 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 2539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 2509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time
[2022-02-15 02:11:56,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 51 Invalid, 2539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 2509 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time]
[2022-02-15 02:11:56,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states.
[2022-02-15 02:11:57,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 544.
[2022-02-15 02:11:57,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 529 states have (on average 1.1814744801512287) internal successors, (625), 532 states have internal predecessors, (625), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:11:57,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 642 transitions.
[2022-02-15 02:11:57,520 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 642 transitions. Word has length 76
[2022-02-15 02:11:57,520 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:11:57,521 INFO L470 AbstractCegarLoop]: Abstraction has 544 states and 642 transitions.
[2022-02-15 02:11:57,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.627906976744186) internal successors, (70), 42 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:11:57,521 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 642 transitions.
[2022-02-15 02:11:57,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80
[2022-02-15 02:11:57,521 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:11:57,521 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 18, 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 02:11:57,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168
[2022-02-15 02:11:57,521 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:11:57,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:11:57,521 INFO L85 PathProgramCache]: Analyzing trace with hash 787799167, now seen corresponding path program 154 times
[2022-02-15 02:11:57,521 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:11:57,521 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1670059715]
[2022-02-15 02:11:57,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:11:57,565 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:11:57,622 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:11:57,622 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:11:57,664 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:11:57,717 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:11:57,717 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:11:57,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:11:57,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:11:57,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:11:57,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:11:57,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:11:57,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:11:57,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:11:58,662 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:11:58,662 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1670059715]
[2022-02-15 02:11:58,662 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1670059715] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:11:58,662 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:11:58,662 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28
[2022-02-15 02:11:58,662 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690611557]
[2022-02-15 02:11:58,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:11:58,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states
[2022-02-15 02:11:58,662 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:11:58,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants.
[2022-02-15 02:11:58,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870
[2022-02-15 02:11:58,663 INFO L87 Difference]: Start difference. First operand 544 states and 642 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:12:01,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:12:01,778 INFO L93 Difference]: Finished difference Result 1141 states and 1321 transitions.
[2022-02-15 02:12:01,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states.
[2022-02-15 02:12:01,778 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 79
[2022-02-15 02:12:01,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:12:01,779 INFO L225 Difference]: With dead ends: 1141
[2022-02-15 02:12:01,779 INFO L226 Difference]: Without dead ends: 709
[2022-02-15 02:12:01,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 12 SyntacticMatches, 35 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056
[2022-02-15 02:12:01,780 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 51 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 2160 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 2173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 2160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time
[2022-02-15 02:12:01,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 55 Invalid, 2173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 2160 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time]
[2022-02-15 02:12:01,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states.
[2022-02-15 02:12:03,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 553.
[2022-02-15 02:12:03,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 538 states have (on average 1.178438661710037) internal successors, (634), 541 states have internal predecessors, (634), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:12:03,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 651 transitions.
[2022-02-15 02:12:03,095 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 651 transitions. Word has length 79
[2022-02-15 02:12:03,095 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:12:03,095 INFO L470 AbstractCegarLoop]: Abstraction has 553 states and 651 transitions.
[2022-02-15 02:12:03,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:12:03,096 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 651 transitions.
[2022-02-15 02:12:03,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80
[2022-02-15 02:12:03,096 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:12:03,096 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 17, 2, 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 02:12:03,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169
[2022-02-15 02:12:03,096 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:12:03,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:12:03,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1467071421, now seen corresponding path program 155 times
[2022-02-15 02:12:03,096 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:12:03,096 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1862668779]
[2022-02-15 02:12:03,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:12:03,131 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:12:03,187 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:12:03,187 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:12:03,224 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:12:03,266 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:12:03,267 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:12:03,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:12:03,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:12:03,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:12:03,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:12:03,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:12:03,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:12:03,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:12:04,195 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:12:04,195 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1862668779]
[2022-02-15 02:12:04,195 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1862668779] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:12:04,195 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:12:04,195 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29
[2022-02-15 02:12:04,195 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286355395]
[2022-02-15 02:12:04,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:12:04,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states
[2022-02-15 02:12:04,195 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:12:04,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants.
[2022-02-15 02:12:04,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930
[2022-02-15 02:12:04,196 INFO L87 Difference]: Start difference. First operand 553 states and 651 transitions. Second operand has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:12:07,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:12:07,514 INFO L93 Difference]: Finished difference Result 1159 states and 1339 transitions.
[2022-02-15 02:12:07,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states.
[2022-02-15 02:12:07,514 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 79
[2022-02-15 02:12:07,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:12:07,515 INFO L225 Difference]: With dead ends: 1159
[2022-02-15 02:12:07,515 INFO L226 Difference]: Without dead ends: 718
[2022-02-15 02:12:07,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 12 SyntacticMatches, 34 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=126, Invalid=996, Unknown=0, NotChecked=0, Total=1122
[2022-02-15 02:12:07,516 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 51 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 2280 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 2294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 2280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time
[2022-02-15 02:12:07,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 74 Invalid, 2294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 2280 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time]
[2022-02-15 02:12:07,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states.
[2022-02-15 02:12:08,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 553.
[2022-02-15 02:12:08,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 538 states have (on average 1.178438661710037) internal successors, (634), 541 states have internal predecessors, (634), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:12:08,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 651 transitions.
[2022-02-15 02:12:08,880 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 651 transitions. Word has length 79
[2022-02-15 02:12:08,881 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:12:08,881 INFO L470 AbstractCegarLoop]: Abstraction has 553 states and 651 transitions.
[2022-02-15 02:12:08,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:12:08,881 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 651 transitions.
[2022-02-15 02:12:08,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80
[2022-02-15 02:12:08,881 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:12:08,881 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 16, 3, 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 02:12:08,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170
[2022-02-15 02:12:08,881 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:12:08,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:12:08,881 INFO L85 PathProgramCache]: Analyzing trace with hash 2027771199, now seen corresponding path program 156 times
[2022-02-15 02:12:08,882 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:12:08,882 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [35460679]
[2022-02-15 02:12:08,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:12:08,929 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:12:08,962 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:12:08,962 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:12:09,008 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:12:09,040 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:12:09,040 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:12:09,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:12:09,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:12:09,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:12:09,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:12:09,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:12:09,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:12:09,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:12:09,962 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:12:09,962 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [35460679]
[2022-02-15 02:12:09,962 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [35460679] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:12:09,962 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:12:09,962 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30
[2022-02-15 02:12:09,962 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208062795]
[2022-02-15 02:12:09,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:12:09,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states
[2022-02-15 02:12:09,962 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:12:09,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants.
[2022-02-15 02:12:09,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992
[2022-02-15 02:12:09,963 INFO L87 Difference]: Start difference. First operand 553 states and 651 transitions. Second operand has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:12:13,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:12:13,261 INFO L93 Difference]: Finished difference Result 1150 states and 1330 transitions.
[2022-02-15 02:12:13,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states.
[2022-02-15 02:12:13,262 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 79
[2022-02-15 02:12:13,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:12:13,262 INFO L225 Difference]: With dead ends: 1150
[2022-02-15 02:12:13,262 INFO L226 Difference]: Without dead ends: 709
[2022-02-15 02:12:13,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 12 SyntacticMatches, 33 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=136, Invalid=1054, Unknown=0, NotChecked=0, Total=1190
[2022-02-15 02:12:13,263 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 61 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 2188 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 2203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 2188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time
[2022-02-15 02:12:13,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 54 Invalid, 2203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 2188 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time]
[2022-02-15 02:12:13,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states.
[2022-02-15 02:12:14,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 553.
[2022-02-15 02:12:14,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 538 states have (on average 1.178438661710037) internal successors, (634), 541 states have internal predecessors, (634), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:12:14,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 651 transitions.
[2022-02-15 02:12:14,653 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 651 transitions. Word has length 79
[2022-02-15 02:12:14,653 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:12:14,653 INFO L470 AbstractCegarLoop]: Abstraction has 553 states and 651 transitions.
[2022-02-15 02:12:14,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:12:14,653 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 651 transitions.
[2022-02-15 02:12:14,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80
[2022-02-15 02:12:14,653 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:12:14,653 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 15, 4, 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 02:12:14,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171
[2022-02-15 02:12:14,653 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:12:14,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:12:14,654 INFO L85 PathProgramCache]: Analyzing trace with hash 2068445949, now seen corresponding path program 157 times
[2022-02-15 02:12:14,654 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:12:14,654 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [97878882]
[2022-02-15 02:12:14,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:12:14,700 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:12:14,743 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:12:14,743 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:12:14,777 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:12:14,823 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:12:14,823 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:12:14,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:12:14,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:12:14,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:12:14,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:12:14,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:12:14,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:12:14,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:12:15,745 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:12:15,745 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [97878882]
[2022-02-15 02:12:15,745 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [97878882] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:12:15,745 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:12:15,745 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31
[2022-02-15 02:12:15,745 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717087383]
[2022-02-15 02:12:15,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:12:15,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states
[2022-02-15 02:12:15,745 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:12:15,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants.
[2022-02-15 02:12:15,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056
[2022-02-15 02:12:15,746 INFO L87 Difference]: Start difference. First operand 553 states and 651 transitions. Second operand has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 30 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:12:19,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:12:19,019 INFO L93 Difference]: Finished difference Result 1141 states and 1321 transitions.
[2022-02-15 02:12:19,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states.
[2022-02-15 02:12:19,019 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 30 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 79
[2022-02-15 02:12:19,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:12:19,020 INFO L225 Difference]: With dead ends: 1141
[2022-02-15 02:12:19,020 INFO L226 Difference]: Without dead ends: 700
[2022-02-15 02:12:19,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 12 SyntacticMatches, 32 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=146, Invalid=1114, Unknown=0, NotChecked=0, Total=1260
[2022-02-15 02:12:19,021 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 55 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 2333 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 2349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 2333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time
[2022-02-15 02:12:19,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 72 Invalid, 2349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 2333 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time]
[2022-02-15 02:12:19,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states.
[2022-02-15 02:12:20,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 553.
[2022-02-15 02:12:20,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 538 states have (on average 1.178438661710037) internal successors, (634), 541 states have internal predecessors, (634), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:12:20,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 651 transitions.
[2022-02-15 02:12:20,408 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 651 transitions. Word has length 79
[2022-02-15 02:12:20,408 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:12:20,408 INFO L470 AbstractCegarLoop]: Abstraction has 553 states and 651 transitions.
[2022-02-15 02:12:20,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 30 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:12:20,408 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 651 transitions.
[2022-02-15 02:12:20,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80
[2022-02-15 02:12:20,408 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:12:20,409 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 14, 5, 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 02:12:20,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172
[2022-02-15 02:12:20,409 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:12:20,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:12:20,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1782620673, now seen corresponding path program 158 times
[2022-02-15 02:12:20,409 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:12:20,409 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2007414285]
[2022-02-15 02:12:20,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:12:20,456 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:12:20,498 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:12:20,498 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:12:20,532 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:12:20,574 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:12:20,574 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:12:20,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:12:20,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:12:20,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:12:20,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:12:20,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:12:20,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:12:20,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:12:21,514 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:12:21,514 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2007414285]
[2022-02-15 02:12:21,514 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2007414285] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:12:21,515 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:12:21,515 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32
[2022-02-15 02:12:21,515 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144960243]
[2022-02-15 02:12:21,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:12:21,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states
[2022-02-15 02:12:21,515 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:12:21,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants.
[2022-02-15 02:12:21,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=995, Unknown=0, NotChecked=0, Total=1122
[2022-02-15 02:12:21,515 INFO L87 Difference]: Start difference. First operand 553 states and 651 transitions. Second operand has 32 states, 32 states have (on average 2.28125) internal successors, (73), 31 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:12:24,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:12:24,716 INFO L93 Difference]: Finished difference Result 1132 states and 1312 transitions.
[2022-02-15 02:12:24,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states.
[2022-02-15 02:12:24,716 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 31 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 79
[2022-02-15 02:12:24,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:12:24,717 INFO L225 Difference]: With dead ends: 1132
[2022-02-15 02:12:24,717 INFO L226 Difference]: Without dead ends: 691
[2022-02-15 02:12:24,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 12 SyntacticMatches, 31 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=156, Invalid=1176, Unknown=0, NotChecked=0, Total=1332
[2022-02-15 02:12:24,718 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 64 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 2235 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 2252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 2235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time
[2022-02-15 02:12:24,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 58 Invalid, 2252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 2235 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time]
[2022-02-15 02:12:24,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states.
[2022-02-15 02:12:26,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 553.
[2022-02-15 02:12:26,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 538 states have (on average 1.178438661710037) internal successors, (634), 541 states have internal predecessors, (634), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:12:26,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 651 transitions.
[2022-02-15 02:12:26,156 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 651 transitions. Word has length 79
[2022-02-15 02:12:26,156 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:12:26,157 INFO L470 AbstractCegarLoop]: Abstraction has 553 states and 651 transitions.
[2022-02-15 02:12:26,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 31 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:12:26,157 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 651 transitions.
[2022-02-15 02:12:26,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80
[2022-02-15 02:12:26,157 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:12:26,157 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 13, 6, 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 02:12:26,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173
[2022-02-15 02:12:26,157 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:12:26,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:12:26,157 INFO L85 PathProgramCache]: Analyzing trace with hash 2031266365, now seen corresponding path program 159 times
[2022-02-15 02:12:26,157 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:12:26,157 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [564459460]
[2022-02-15 02:12:26,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:12:26,192 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:12:26,224 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:12:26,224 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:12:26,273 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:12:26,305 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:12:26,305 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:12:26,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:12:26,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:12:26,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:12:26,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:12:26,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:12:26,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:12:26,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:12:27,242 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:12:27,242 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [564459460]
[2022-02-15 02:12:27,242 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [564459460] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:12:27,242 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:12:27,242 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33
[2022-02-15 02:12:27,242 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435506804]
[2022-02-15 02:12:27,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:12:27,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states
[2022-02-15 02:12:27,243 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:12:27,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants.
[2022-02-15 02:12:27,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1055, Unknown=0, NotChecked=0, Total=1190
[2022-02-15 02:12:27,243 INFO L87 Difference]: Start difference. First operand 553 states and 651 transitions. Second operand has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:12:30,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:12:30,406 INFO L93 Difference]: Finished difference Result 1123 states and 1303 transitions.
[2022-02-15 02:12:30,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states.
[2022-02-15 02:12:30,407 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 79
[2022-02-15 02:12:30,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:12:30,407 INFO L225 Difference]: With dead ends: 1123
[2022-02-15 02:12:30,407 INFO L226 Difference]: Without dead ends: 682
[2022-02-15 02:12:30,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 12 SyntacticMatches, 30 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 883 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=166, Invalid=1240, Unknown=0, NotChecked=0, Total=1406
[2022-02-15 02:12:30,408 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 63 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 2368 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 2386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 2368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time
[2022-02-15 02:12:30,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 67 Invalid, 2386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 2368 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time]
[2022-02-15 02:12:30,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states.
[2022-02-15 02:12:31,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 553.
[2022-02-15 02:12:31,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 538 states have (on average 1.178438661710037) internal successors, (634), 541 states have internal predecessors, (634), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:12:31,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 651 transitions.
[2022-02-15 02:12:31,849 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 651 transitions. Word has length 79
[2022-02-15 02:12:31,849 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:12:31,849 INFO L470 AbstractCegarLoop]: Abstraction has 553 states and 651 transitions.
[2022-02-15 02:12:31,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:12:31,849 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 651 transitions.
[2022-02-15 02:12:31,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80
[2022-02-15 02:12:31,850 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:12:31,850 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 12, 7, 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 02:12:31,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174
[2022-02-15 02:12:31,850 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:12:31,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:12:31,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1678177983, now seen corresponding path program 160 times
[2022-02-15 02:12:31,850 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:12:31,850 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [888887622]
[2022-02-15 02:12:31,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:12:31,897 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:12:31,939 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:12:31,939 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:12:31,985 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:12:32,028 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:12:32,028 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:12:32,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:12:32,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:12:32,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:12:32,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:12:32,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:12:32,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:12:32,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:12:32,992 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:12:32,993 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [888887622]
[2022-02-15 02:12:32,993 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [888887622] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:12:32,993 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:12:32,993 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34
[2022-02-15 02:12:32,993 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042140546]
[2022-02-15 02:12:32,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:12:32,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states
[2022-02-15 02:12:32,993 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:12:32,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants.
[2022-02-15 02:12:32,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1117, Unknown=0, NotChecked=0, Total=1260
[2022-02-15 02:12:32,994 INFO L87 Difference]: Start difference. First operand 553 states and 651 transitions. Second operand has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:12:36,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:12:36,146 INFO L93 Difference]: Finished difference Result 1114 states and 1294 transitions.
[2022-02-15 02:12:36,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states.
[2022-02-15 02:12:36,147 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 79
[2022-02-15 02:12:36,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:12:36,147 INFO L225 Difference]: With dead ends: 1114
[2022-02-15 02:12:36,147 INFO L226 Difference]: Without dead ends: 673
[2022-02-15 02:12:36,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 12 SyntacticMatches, 29 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 940 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=176, Invalid=1306, Unknown=0, NotChecked=0, Total=1482
[2022-02-15 02:12:36,148 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 66 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 2574 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 2593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 2574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time
[2022-02-15 02:12:36,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 65 Invalid, 2593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 2574 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time]
[2022-02-15 02:12:36,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states.
[2022-02-15 02:12:37,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 553.
[2022-02-15 02:12:37,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 538 states have (on average 1.178438661710037) internal successors, (634), 541 states have internal predecessors, (634), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:12:37,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 651 transitions.
[2022-02-15 02:12:37,587 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 651 transitions. Word has length 79
[2022-02-15 02:12:37,588 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:12:37,588 INFO L470 AbstractCegarLoop]: Abstraction has 553 states and 651 transitions.
[2022-02-15 02:12:37,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:12:37,588 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 651 transitions.
[2022-02-15 02:12:37,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80
[2022-02-15 02:12:37,588 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:12:37,588 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 11, 8, 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 02:12:37,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175
[2022-02-15 02:12:37,588 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:12:37,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:12:37,588 INFO L85 PathProgramCache]: Analyzing trace with hash -371209859, now seen corresponding path program 161 times
[2022-02-15 02:12:37,589 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:12:37,589 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [855778522]
[2022-02-15 02:12:37,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:12:37,635 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:12:37,667 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:12:37,667 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:12:37,713 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:12:37,746 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:12:37,746 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:12:37,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:12:37,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:12:37,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:12:37,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:12:37,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:12:37,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:12:37,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:12:38,729 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:12:38,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [855778522]
[2022-02-15 02:12:38,729 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [855778522] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:12:38,729 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:12:38,729 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35
[2022-02-15 02:12:38,729 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136766590]
[2022-02-15 02:12:38,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:12:38,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states
[2022-02-15 02:12:38,730 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:12:38,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants.
[2022-02-15 02:12:38,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1246, Unknown=0, NotChecked=0, Total=1406
[2022-02-15 02:12:38,730 INFO L87 Difference]: Start difference. First operand 553 states and 651 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:12:41,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:12:41,822 INFO L93 Difference]: Finished difference Result 1114 states and 1290 transitions.
[2022-02-15 02:12:41,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states.
[2022-02-15 02:12:41,822 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 79
[2022-02-15 02:12:41,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:12:41,823 INFO L225 Difference]: With dead ends: 1114
[2022-02-15 02:12:41,823 INFO L226 Difference]: Without dead ends: 673
[2022-02-15 02:12:41,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 12 SyntacticMatches, 28 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1032 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=185, Invalid=1375, Unknown=0, NotChecked=0, Total=1560
[2022-02-15 02:12:41,824 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 73 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 2125 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 2145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 2125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time
[2022-02-15 02:12:41,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 56 Invalid, 2145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 2125 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time]
[2022-02-15 02:12:41,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states.
[2022-02-15 02:12:43,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 553.
[2022-02-15 02:12:43,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 538 states have (on average 1.178438661710037) internal successors, (634), 541 states have internal predecessors, (634), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:12:43,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 651 transitions.
[2022-02-15 02:12:43,270 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 651 transitions. Word has length 79
[2022-02-15 02:12:43,270 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:12:43,270 INFO L470 AbstractCegarLoop]: Abstraction has 553 states and 651 transitions.
[2022-02-15 02:12:43,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:12:43,270 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 651 transitions.
[2022-02-15 02:12:43,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80
[2022-02-15 02:12:43,271 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:12:43,271 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 10, 9, 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 02:12:43,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176
[2022-02-15 02:12:43,271 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:12:43,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:12:43,271 INFO L85 PathProgramCache]: Analyzing trace with hash 52436863, now seen corresponding path program 162 times
[2022-02-15 02:12:43,271 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:12:43,271 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [894378562]
[2022-02-15 02:12:43,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:12:43,306 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:12:43,350 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:12:43,350 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:12:43,393 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:12:43,435 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:12:43,436 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:12:43,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:12:43,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:12:43,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:12:43,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:12:43,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:12:43,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:12:43,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:12:44,397 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:12:44,398 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [894378562]
[2022-02-15 02:12:44,398 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [894378562] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:12:44,398 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:12:44,398 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36
[2022-02-15 02:12:44,398 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094780404]
[2022-02-15 02:12:44,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:12:44,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states
[2022-02-15 02:12:44,398 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:12:44,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants.
[2022-02-15 02:12:44,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1247, Unknown=0, NotChecked=0, Total=1406
[2022-02-15 02:12:44,399 INFO L87 Difference]: Start difference. First operand 553 states and 651 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:12:47,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:12:47,319 INFO L93 Difference]: Finished difference Result 1096 states and 1276 transitions.
[2022-02-15 02:12:47,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states.
[2022-02-15 02:12:47,319 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 79
[2022-02-15 02:12:47,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:12:47,320 INFO L225 Difference]: With dead ends: 1096
[2022-02-15 02:12:47,320 INFO L226 Difference]: Without dead ends: 655
[2022-02-15 02:12:47,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 12 SyntacticMatches, 27 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1027 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=196, Invalid=1444, Unknown=0, NotChecked=0, Total=1640
[2022-02-15 02:12:47,320 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 70 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 2478 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 2499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 2478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time
[2022-02-15 02:12:47,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 68 Invalid, 2499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 2478 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time]
[2022-02-15 02:12:47,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states.
[2022-02-15 02:12:48,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 553.
[2022-02-15 02:12:48,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 538 states have (on average 1.178438661710037) internal successors, (634), 541 states have internal predecessors, (634), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:12:48,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 651 transitions.
[2022-02-15 02:12:48,759 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 651 transitions. Word has length 79
[2022-02-15 02:12:48,759 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:12:48,759 INFO L470 AbstractCegarLoop]: Abstraction has 553 states and 651 transitions.
[2022-02-15 02:12:48,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:12:48,759 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 651 transitions.
[2022-02-15 02:12:48,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80
[2022-02-15 02:12:48,759 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:12:48,759 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 10, 9, 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 02:12:48,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177
[2022-02-15 02:12:48,759 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:12:48,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:12:48,760 INFO L85 PathProgramCache]: Analyzing trace with hash -976922435, now seen corresponding path program 163 times
[2022-02-15 02:12:48,760 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:12:48,760 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [434503301]
[2022-02-15 02:12:48,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:12:48,806 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:12:48,848 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:12:48,848 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:12:48,882 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:12:48,923 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:12:48,923 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:12:48,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:12:48,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:12:48,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:12:48,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:12:48,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:12:48,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:12:48,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:12:49,904 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:12:49,904 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [434503301]
[2022-02-15 02:12:49,904 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [434503301] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:12:49,904 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:12:49,904 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37
[2022-02-15 02:12:49,904 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454705716]
[2022-02-15 02:12:49,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:12:49,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states
[2022-02-15 02:12:49,904 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:12:49,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants.
[2022-02-15 02:12:49,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1315, Unknown=0, NotChecked=0, Total=1482
[2022-02-15 02:12:49,905 INFO L87 Difference]: Start difference. First operand 553 states and 651 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:12:52,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:12:52,926 INFO L93 Difference]: Finished difference Result 1087 states and 1267 transitions.
[2022-02-15 02:12:52,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states.
[2022-02-15 02:12:52,926 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 79
[2022-02-15 02:12:52,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:12:52,927 INFO L225 Difference]: With dead ends: 1087
[2022-02-15 02:12:52,927 INFO L226 Difference]: Without dead ends: 646
[2022-02-15 02:12:52,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 12 SyntacticMatches, 26 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1057 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=206, Invalid=1516, Unknown=0, NotChecked=0, Total=1722
[2022-02-15 02:12:52,928 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 66 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 3073 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 3095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 3073 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time
[2022-02-15 02:12:52,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 82 Invalid, 3095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 3073 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time]
[2022-02-15 02:12:52,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states.
[2022-02-15 02:12:54,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 553.
[2022-02-15 02:12:54,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 538 states have (on average 1.178438661710037) internal successors, (634), 541 states have internal predecessors, (634), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:12:54,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 651 transitions.
[2022-02-15 02:12:54,416 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 651 transitions. Word has length 79
[2022-02-15 02:12:54,416 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:12:54,416 INFO L470 AbstractCegarLoop]: Abstraction has 553 states and 651 transitions.
[2022-02-15 02:12:54,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:12:54,416 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 651 transitions.
[2022-02-15 02:12:54,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80
[2022-02-15 02:12:54,417 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:12:54,417 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 11, 8, 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 02:12:54,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178
[2022-02-15 02:12:54,417 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:12:54,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:12:54,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1820927937, now seen corresponding path program 164 times
[2022-02-15 02:12:54,417 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:12:54,417 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [646340931]
[2022-02-15 02:12:54,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:12:54,465 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:12:54,518 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:12:54,518 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:12:54,575 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:12:54,626 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:12:54,626 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:12:54,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:12:54,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:12:54,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:12:54,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:12:54,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:12:54,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:12:54,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:12:55,629 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:12:55,629 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [646340931]
[2022-02-15 02:12:55,629 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [646340931] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:12:55,629 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:12:55,629 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38
[2022-02-15 02:12:55,629 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649471700]
[2022-02-15 02:12:55,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:12:55,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states
[2022-02-15 02:12:55,629 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:12:55,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants.
[2022-02-15 02:12:55,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1456, Unknown=0, NotChecked=0, Total=1640
[2022-02-15 02:12:55,630 INFO L87 Difference]: Start difference. First operand 553 states and 651 transitions. Second operand has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:12:58,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:12:58,572 INFO L93 Difference]: Finished difference Result 1096 states and 1272 transitions.
[2022-02-15 02:12:58,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states.
[2022-02-15 02:12:58,572 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 79
[2022-02-15 02:12:58,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:12:58,573 INFO L225 Difference]: With dead ends: 1096
[2022-02-15 02:12:58,573 INFO L226 Difference]: Without dead ends: 655
[2022-02-15 02:12:58,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 12 SyntacticMatches, 25 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1116 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=215, Invalid=1591, Unknown=0, NotChecked=0, Total=1806
[2022-02-15 02:12:58,574 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 97 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 2080 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 2103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 2080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time
[2022-02-15 02:12:58,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 43 Invalid, 2103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 2080 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time]
[2022-02-15 02:12:58,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states.
[2022-02-15 02:13:00,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 553.
[2022-02-15 02:13:00,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 538 states have (on average 1.178438661710037) internal successors, (634), 541 states have internal predecessors, (634), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:13:00,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 651 transitions.
[2022-02-15 02:13:00,040 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 651 transitions. Word has length 79
[2022-02-15 02:13:00,040 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:13:00,040 INFO L470 AbstractCegarLoop]: Abstraction has 553 states and 651 transitions.
[2022-02-15 02:13:00,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:13:00,040 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 651 transitions.
[2022-02-15 02:13:00,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80
[2022-02-15 02:13:00,041 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:13:00,041 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 12, 7, 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 02:13:00,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179
[2022-02-15 02:13:00,041 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:13:00,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:13:00,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1546168323, now seen corresponding path program 165 times
[2022-02-15 02:13:00,041 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:13:00,041 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1606943172]
[2022-02-15 02:13:00,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:13:00,088 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:13:00,130 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:13:00,130 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:13:00,164 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:13:00,205 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:13:00,205 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:13:00,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:13:00,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:13:00,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:13:00,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:13:00,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:13:00,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:13:00,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:13:01,213 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:13:01,213 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1606943172]
[2022-02-15 02:13:01,213 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1606943172] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:13:01,213 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:13:01,213 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39
[2022-02-15 02:13:01,214 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460377272]
[2022-02-15 02:13:01,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:13:01,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states
[2022-02-15 02:13:01,214 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:13:01,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants.
[2022-02-15 02:13:01,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1457, Unknown=0, NotChecked=0, Total=1640
[2022-02-15 02:13:01,214 INFO L87 Difference]: Start difference. First operand 553 states and 651 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:13:04,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:13:04,047 INFO L93 Difference]: Finished difference Result 1069 states and 1249 transitions.
[2022-02-15 02:13:04,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states.
[2022-02-15 02:13:04,048 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 79
[2022-02-15 02:13:04,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:13:04,048 INFO L225 Difference]: With dead ends: 1069
[2022-02-15 02:13:04,048 INFO L226 Difference]: Without dead ends: 628
[2022-02-15 02:13:04,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 12 SyntacticMatches, 24 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=226, Invalid=1666, Unknown=0, NotChecked=0, Total=1892
[2022-02-15 02:13:04,049 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 73 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 2997 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 3021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 2997 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time
[2022-02-15 02:13:04,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 79 Invalid, 3021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 2997 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time]
[2022-02-15 02:13:04,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states.
[2022-02-15 02:13:05,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 553.
[2022-02-15 02:13:05,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 538 states have (on average 1.178438661710037) internal successors, (634), 541 states have internal predecessors, (634), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:13:05,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 651 transitions.
[2022-02-15 02:13:05,535 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 651 transitions. Word has length 79
[2022-02-15 02:13:05,535 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:13:05,536 INFO L470 AbstractCegarLoop]: Abstraction has 553 states and 651 transitions.
[2022-02-15 02:13:05,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:13:05,536 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 651 transitions.
[2022-02-15 02:13:05,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80
[2022-02-15 02:13:05,536 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:13:05,536 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 13, 6, 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 02:13:05,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180
[2022-02-15 02:13:05,536 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:13:05,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:13:05,536 INFO L85 PathProgramCache]: Analyzing trace with hash -159964929, now seen corresponding path program 166 times
[2022-02-15 02:13:05,536 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:13:05,536 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1112870216]
[2022-02-15 02:13:05,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:13:05,571 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:13:05,613 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:13:05,613 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:13:05,647 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:13:05,678 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:13:05,678 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:13:05,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:13:05,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:13:05,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:13:05,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:13:05,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:13:05,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:13:05,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:13:06,709 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:13:06,710 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1112870216]
[2022-02-15 02:13:06,710 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1112870216] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:13:06,710 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:13:06,710 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40
[2022-02-15 02:13:06,710 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901794838]
[2022-02-15 02:13:06,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:13:06,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states
[2022-02-15 02:13:06,710 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:13:06,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants.
[2022-02-15 02:13:06,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1531, Unknown=0, NotChecked=0, Total=1722
[2022-02-15 02:13:06,711 INFO L87 Difference]: Start difference. First operand 553 states and 651 transitions. Second operand has 40 states, 40 states have (on average 1.825) internal successors, (73), 39 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:13:09,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:13:09,358 INFO L93 Difference]: Finished difference Result 1060 states and 1240 transitions.
[2022-02-15 02:13:09,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states.
[2022-02-15 02:13:09,358 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.825) internal successors, (73), 39 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 79
[2022-02-15 02:13:09,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:13:09,359 INFO L225 Difference]: With dead ends: 1060
[2022-02-15 02:13:09,359 INFO L226 Difference]: Without dead ends: 619
[2022-02-15 02:13:09,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 12 SyntacticMatches, 23 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1093 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=236, Invalid=1744, Unknown=0, NotChecked=0, Total=1980
[2022-02-15 02:13:09,359 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 97 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 2601 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 2626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 2601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time
[2022-02-15 02:13:09,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 52 Invalid, 2626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 2601 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time]
[2022-02-15 02:13:09,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states.
[2022-02-15 02:13:10,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 553.
[2022-02-15 02:13:10,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 538 states have (on average 1.178438661710037) internal successors, (634), 541 states have internal predecessors, (634), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:13:10,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 651 transitions.
[2022-02-15 02:13:10,824 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 651 transitions. Word has length 79
[2022-02-15 02:13:10,824 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:13:10,824 INFO L470 AbstractCegarLoop]: Abstraction has 553 states and 651 transitions.
[2022-02-15 02:13:10,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.825) internal successors, (73), 39 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:13:10,824 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 651 transitions.
[2022-02-15 02:13:10,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80
[2022-02-15 02:13:10,824 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:13:10,824 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 14, 5, 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 02:13:10,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181
[2022-02-15 02:13:10,824 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:13:10,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:13:10,825 INFO L85 PathProgramCache]: Analyzing trace with hash -97925315, now seen corresponding path program 167 times
[2022-02-15 02:13:10,825 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:13:10,825 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [203584848]
[2022-02-15 02:13:10,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:13:10,871 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:13:10,904 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:13:10,904 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:13:10,937 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:13:10,979 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:13:10,979 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:13:10,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:13:10,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:13:11,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:13:11,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:13:11,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:13:11,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:13:11,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:13:12,029 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:13:12,029 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [203584848]
[2022-02-15 02:13:12,029 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [203584848] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:13:12,029 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:13:12,029 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41
[2022-02-15 02:13:12,029 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866967935]
[2022-02-15 02:13:12,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:13:12,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states
[2022-02-15 02:13:12,030 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:13:12,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants.
[2022-02-15 02:13:12,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1607, Unknown=0, NotChecked=0, Total=1806
[2022-02-15 02:13:12,030 INFO L87 Difference]: Start difference. First operand 553 states and 651 transitions. Second operand has 41 states, 41 states have (on average 1.7804878048780488) internal successors, (73), 40 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:13:14,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:13:14,792 INFO L93 Difference]: Finished difference Result 1051 states and 1231 transitions.
[2022-02-15 02:13:14,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states.
[2022-02-15 02:13:14,792 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.7804878048780488) internal successors, (73), 40 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 79
[2022-02-15 02:13:14,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:13:14,793 INFO L225 Difference]: With dead ends: 1051
[2022-02-15 02:13:14,793 INFO L226 Difference]: Without dead ends: 610
[2022-02-15 02:13:14,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 12 SyntacticMatches, 22 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1087 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=246, Invalid=1824, Unknown=0, NotChecked=0, Total=2070
[2022-02-15 02:13:14,794 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 88 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 3128 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 3154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 3128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time
[2022-02-15 02:13:14,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 71 Invalid, 3154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 3128 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time]
[2022-02-15 02:13:14,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states.
[2022-02-15 02:13:16,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 553.
[2022-02-15 02:13:16,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 538 states have (on average 1.178438661710037) internal successors, (634), 541 states have internal predecessors, (634), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:13:16,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 651 transitions.
[2022-02-15 02:13:16,278 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 651 transitions. Word has length 79
[2022-02-15 02:13:16,278 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:13:16,278 INFO L470 AbstractCegarLoop]: Abstraction has 553 states and 651 transitions.
[2022-02-15 02:13:16,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.7804878048780488) internal successors, (73), 40 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:13:16,278 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 651 transitions.
[2022-02-15 02:13:16,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80
[2022-02-15 02:13:16,278 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:13:16,278 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 15, 4, 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 02:13:16,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182
[2022-02-15 02:13:16,279 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:13:16,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:13:16,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1903363649, now seen corresponding path program 168 times
[2022-02-15 02:13:16,279 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:13:16,279 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [905536029]
[2022-02-15 02:13:16,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:13:16,313 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:13:16,355 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:13:16,355 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:13:16,388 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:13:16,431 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:13:16,431 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:13:16,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:13:16,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:13:16,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:13:16,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:13:16,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:13:16,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:13:16,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:13:17,473 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:13:17,474 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [905536029]
[2022-02-15 02:13:17,474 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [905536029] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:13:17,474 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:13:17,474 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42
[2022-02-15 02:13:17,474 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164928897]
[2022-02-15 02:13:17,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:13:17,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states
[2022-02-15 02:13:17,474 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:13:17,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants.
[2022-02-15 02:13:17,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=1764, Unknown=0, NotChecked=0, Total=1980
[2022-02-15 02:13:17,475 INFO L87 Difference]: Start difference. First operand 553 states and 651 transitions. Second operand has 42 states, 42 states have (on average 1.7380952380952381) internal successors, (73), 41 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:13:20,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:13:20,417 INFO L93 Difference]: Finished difference Result 1072 states and 1248 transitions.
[2022-02-15 02:13:20,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states.
[2022-02-15 02:13:20,417 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.7380952380952381) internal successors, (73), 41 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 79
[2022-02-15 02:13:20,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:13:20,418 INFO L225 Difference]: With dead ends: 1072
[2022-02-15 02:13:20,418 INFO L226 Difference]: Without dead ends: 631
[2022-02-15 02:13:20,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 12 SyntacticMatches, 21 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1102 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=255, Invalid=1907, Unknown=0, NotChecked=0, Total=2162
[2022-02-15 02:13:20,419 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 107 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 2573 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 2602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 2573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time
[2022-02-15 02:13:20,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 54 Invalid, 2602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 2573 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time]
[2022-02-15 02:13:20,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states.
[2022-02-15 02:13:21,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 553.
[2022-02-15 02:13:21,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 538 states have (on average 1.178438661710037) internal successors, (634), 541 states have internal predecessors, (634), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:13:21,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 651 transitions.
[2022-02-15 02:13:21,906 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 651 transitions. Word has length 79
[2022-02-15 02:13:21,907 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:13:21,907 INFO L470 AbstractCegarLoop]: Abstraction has 553 states and 651 transitions.
[2022-02-15 02:13:21,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.7380952380952381) internal successors, (73), 41 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:13:21,907 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 651 transitions.
[2022-02-15 02:13:21,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80
[2022-02-15 02:13:21,907 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:13:21,907 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 16, 3, 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 02:13:21,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183
[2022-02-15 02:13:21,907 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:13:21,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:13:21,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1573955197, now seen corresponding path program 169 times
[2022-02-15 02:13:21,908 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:13:21,908 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [899690985]
[2022-02-15 02:13:21,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:13:21,954 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:13:21,996 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:13:21,996 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:13:22,030 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:13:22,071 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:13:22,071 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:13:22,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:13:22,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:13:22,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:13:22,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:13:22,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:13:22,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:13:22,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:13:23,119 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:13:23,119 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [899690985]
[2022-02-15 02:13:23,119 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [899690985] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:13:23,119 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:13:23,119 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43
[2022-02-15 02:13:23,119 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449234748]
[2022-02-15 02:13:23,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:13:23,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states
[2022-02-15 02:13:23,119 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:13:23,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants.
[2022-02-15 02:13:23,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1846, Unknown=0, NotChecked=0, Total=2070
[2022-02-15 02:13:23,120 INFO L87 Difference]: Start difference. First operand 553 states and 651 transitions. Second operand has 43 states, 43 states have (on average 1.697674418604651) internal successors, (73), 42 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:13:26,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:13:26,448 INFO L93 Difference]: Finished difference Result 1066 states and 1242 transitions.
[2022-02-15 02:13:26,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states.
[2022-02-15 02:13:26,449 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.697674418604651) internal successors, (73), 42 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 79
[2022-02-15 02:13:26,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:13:26,449 INFO L225 Difference]: With dead ends: 1066
[2022-02-15 02:13:26,449 INFO L226 Difference]: Without dead ends: 625
[2022-02-15 02:13:26,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 12 SyntacticMatches, 20 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1076 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=265, Invalid=1991, Unknown=0, NotChecked=0, Total=2256
[2022-02-15 02:13:26,450 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 97 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 3894 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 3922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 3894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time
[2022-02-15 02:13:26,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 82 Invalid, 3922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 3894 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time]
[2022-02-15 02:13:26,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states.
[2022-02-15 02:13:27,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 553.
[2022-02-15 02:13:27,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 538 states have (on average 1.178438661710037) internal successors, (634), 541 states have internal predecessors, (634), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:13:27,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 651 transitions.
[2022-02-15 02:13:27,938 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 651 transitions. Word has length 79
[2022-02-15 02:13:27,938 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:13:27,938 INFO L470 AbstractCegarLoop]: Abstraction has 553 states and 651 transitions.
[2022-02-15 02:13:27,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.697674418604651) internal successors, (73), 42 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:13:27,938 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 651 transitions.
[2022-02-15 02:13:27,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80
[2022-02-15 02:13:27,938 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:13:27,939 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 17, 2, 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 02:13:27,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184
[2022-02-15 02:13:27,939 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:13:27,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:13:27,939 INFO L85 PathProgramCache]: Analyzing trace with hash -14392705, now seen corresponding path program 170 times
[2022-02-15 02:13:27,939 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:13:27,939 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1942828412]
[2022-02-15 02:13:27,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:13:27,973 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:13:28,016 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:13:28,017 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:13:28,050 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:13:28,082 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:13:28,082 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:13:28,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:13:28,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:13:28,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:13:28,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:13:28,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:13:28,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:13:28,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:13:29,595 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:13:29,595 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1942828412]
[2022-02-15 02:13:29,595 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1942828412] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:13:29,596 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:13:29,596 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48
[2022-02-15 02:13:29,596 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831233439]
[2022-02-15 02:13:29,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:13:29,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states
[2022-02-15 02:13:29,596 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:13:29,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants.
[2022-02-15 02:13:29,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=2267, Unknown=0, NotChecked=0, Total=2550
[2022-02-15 02:13:29,596 INFO L87 Difference]: Start difference. First operand 553 states and 651 transitions. Second operand has 48 states, 48 states have (on average 1.5208333333333333) internal successors, (73), 46 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:13:32,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:13:32,822 INFO L93 Difference]: Finished difference Result 1074 states and 1250 transitions.
[2022-02-15 02:13:32,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states.
[2022-02-15 02:13:32,822 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.5208333333333333) internal successors, (73), 46 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 79
[2022-02-15 02:13:32,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:13:32,823 INFO L225 Difference]: With dead ends: 1074
[2022-02-15 02:13:32,823 INFO L226 Difference]: Without dead ends: 633
[2022-02-15 02:13:32,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 6 SyntacticMatches, 19 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1162 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=373, Invalid=2597, Unknown=0, NotChecked=0, Total=2970
[2022-02-15 02:13:32,823 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 129 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 2843 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 2875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 2843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time
[2022-02-15 02:13:32,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 64 Invalid, 2875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 2843 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time]
[2022-02-15 02:13:32,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states.
[2022-02-15 02:13:34,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 553.
[2022-02-15 02:13:34,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 538 states have (on average 1.178438661710037) internal successors, (634), 541 states have internal predecessors, (634), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:13:34,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 651 transitions.
[2022-02-15 02:13:34,309 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 651 transitions. Word has length 79
[2022-02-15 02:13:34,309 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:13:34,309 INFO L470 AbstractCegarLoop]: Abstraction has 553 states and 651 transitions.
[2022-02-15 02:13:34,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.5208333333333333) internal successors, (73), 46 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:13:34,309 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 651 transitions.
[2022-02-15 02:13:34,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80
[2022-02-15 02:13:34,309 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:13:34,309 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 18, 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 02:13:34,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185
[2022-02-15 02:13:34,309 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:13:34,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:13:34,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1025509955, now seen corresponding path program 171 times
[2022-02-15 02:13:34,310 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:13:34,310 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [42159940]
[2022-02-15 02:13:34,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:13:34,355 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:13:34,355 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE
[2022-02-15 02:13:34,389 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:13:34,430 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:13:34,430 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:13:34,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:13:34,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:13:34,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:13:34,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:13:34,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:13:34,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:13:34,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:13:35,556 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:13:35,557 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [42159940]
[2022-02-15 02:13:35,557 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [42159940] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:13:35,557 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:13:35,557 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45
[2022-02-15 02:13:35,557 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111413993]
[2022-02-15 02:13:35,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:13:35,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states
[2022-02-15 02:13:35,557 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:13:35,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants.
[2022-02-15 02:13:35,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=1931, Unknown=0, NotChecked=0, Total=2162
[2022-02-15 02:13:35,558 INFO L87 Difference]: Start difference. First operand 553 states and 651 transitions. Second operand has 45 states, 45 states have (on average 1.6222222222222222) internal successors, (73), 44 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:13:38,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:13:38,214 INFO L93 Difference]: Finished difference Result 1042 states and 1232 transitions.
[2022-02-15 02:13:38,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states.
[2022-02-15 02:13:38,214 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.6222222222222222) internal successors, (73), 44 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 79
[2022-02-15 02:13:38,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:13:38,215 INFO L225 Difference]: With dead ends: 1042
[2022-02-15 02:13:38,215 INFO L226 Difference]: Without dead ends: 590
[2022-02-15 02:13:38,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 12 SyntacticMatches, 18 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 973 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=286, Invalid=2164, Unknown=0, NotChecked=0, Total=2450
[2022-02-15 02:13:38,215 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 95 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 3273 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 3304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 3273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time
[2022-02-15 02:13:38,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 68 Invalid, 3304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 3273 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time]
[2022-02-15 02:13:38,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states.
[2022-02-15 02:13:39,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 565.
[2022-02-15 02:13:39,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 550 states have (on average 1.1818181818181819) internal successors, (650), 553 states have internal predecessors, (650), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:13:39,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 667 transitions.
[2022-02-15 02:13:39,699 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 667 transitions. Word has length 79
[2022-02-15 02:13:39,699 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:13:39,699 INFO L470 AbstractCegarLoop]: Abstraction has 565 states and 667 transitions.
[2022-02-15 02:13:39,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.6222222222222222) internal successors, (73), 44 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:13:39,699 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 667 transitions.
[2022-02-15 02:13:39,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82
[2022-02-15 02:13:39,700 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:13:39,700 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 02:13:39,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186
[2022-02-15 02:13:39,700 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:13:39,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:13:39,700 INFO L85 PathProgramCache]: Analyzing trace with hash -860791901, now seen corresponding path program 8 times
[2022-02-15 02:13:39,700 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:13:39,700 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1903619180]
[2022-02-15 02:13:39,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:13:39,740 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:13:39,751 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:13:39,751 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:13:39,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:13:39,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:13:39,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:13:39,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:13:39,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:13:39,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:13:39,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:13:40,050 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:13:40,050 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1903619180]
[2022-02-15 02:13:40,050 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1903619180] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:13:40,050 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:13:40,050 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23
[2022-02-15 02:13:40,051 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543095538]
[2022-02-15 02:13:40,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:13:40,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states
[2022-02-15 02:13:40,051 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:13:40,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants.
[2022-02-15 02:13:40,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506
[2022-02-15 02:13:40,051 INFO L87 Difference]: Start difference. First operand 565 states and 667 transitions. Second operand has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 22 states have internal predecessors, (68), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3)
[2022-02-15 02:13:41,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:13:41,846 INFO L93 Difference]: Finished difference Result 1044 states and 1228 transitions.
[2022-02-15 02:13:41,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states.
[2022-02-15 02:13:41,846 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 22 states have internal predecessors, (68), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 81
[2022-02-15 02:13:41,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:13:41,847 INFO L225 Difference]: With dead ends: 1044
[2022-02-15 02:13:41,847 INFO L226 Difference]: Without dead ends: 585
[2022-02-15 02:13:41,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 16 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=296, Invalid=696, Unknown=0, NotChecked=0, Total=992
[2022-02-15 02:13:41,848 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 106 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-02-15 02:13:41,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 35 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2022-02-15 02:13:41,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states.
[2022-02-15 02:13:43,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 577.
[2022-02-15 02:13:43,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 562 states have (on average 1.1779359430604983) internal successors, (662), 565 states have internal predecessors, (662), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:13:43,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 679 transitions.
[2022-02-15 02:13:43,360 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 679 transitions. Word has length 81
[2022-02-15 02:13:43,360 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:13:43,360 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 679 transitions.
[2022-02-15 02:13:43,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 22 states have internal predecessors, (68), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3)
[2022-02-15 02:13:43,360 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 679 transitions.
[2022-02-15 02:13:43,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83
[2022-02-15 02:13:43,361 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:13:43,361 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 19, 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 02:13:43,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187
[2022-02-15 02:13:43,361 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:13:43,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:13:43,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1888113636, now seen corresponding path program 172 times
[2022-02-15 02:13:43,361 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:13:43,361 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1675028499]
[2022-02-15 02:13:43,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:13:43,407 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:13:43,439 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:13:43,439 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:13:43,485 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:13:43,528 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:13:43,528 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:13:43,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:13:43,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:13:43,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:13:43,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:13:43,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:13:43,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:13:43,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:13:44,541 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:13:44,541 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1675028499]
[2022-02-15 02:13:44,541 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1675028499] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:13:44,541 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:13:44,541 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29
[2022-02-15 02:13:44,541 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707826973]
[2022-02-15 02:13:44,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:13:44,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states
[2022-02-15 02:13:44,541 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:13:44,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants.
[2022-02-15 02:13:44,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930
[2022-02-15 02:13:44,542 INFO L87 Difference]: Start difference. First operand 577 states and 679 transitions. Second operand has 29 states, 29 states have (on average 2.6206896551724137) internal successors, (76), 28 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:13:48,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:13:48,285 INFO L93 Difference]: Finished difference Result 1210 states and 1397 transitions.
[2022-02-15 02:13:48,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states.
[2022-02-15 02:13:48,286 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.6206896551724137) internal successors, (76), 28 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 82
[2022-02-15 02:13:48,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:13:48,287 INFO L225 Difference]: With dead ends: 1210
[2022-02-15 02:13:48,287 INFO L226 Difference]: Without dead ends: 751
[2022-02-15 02:13:48,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 12 SyntacticMatches, 37 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=119, Invalid=1003, Unknown=0, NotChecked=0, Total=1122
[2022-02-15 02:13:48,287 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 48 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 2412 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 2425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 2412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time
[2022-02-15 02:13:48,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 72 Invalid, 2425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 2412 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time]
[2022-02-15 02:13:48,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states.
[2022-02-15 02:13:49,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 586.
[2022-02-15 02:13:49,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 571 states have (on average 1.1751313485113835) internal successors, (671), 574 states have internal predecessors, (671), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:13:49,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 688 transitions.
[2022-02-15 02:13:49,887 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 688 transitions. Word has length 82
[2022-02-15 02:13:49,887 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:13:49,887 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 688 transitions.
[2022-02-15 02:13:49,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.6206896551724137) internal successors, (76), 28 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:13:49,887 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 688 transitions.
[2022-02-15 02:13:49,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83
[2022-02-15 02:13:49,887 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:13:49,887 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 18, 2, 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 02:13:49,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188
[2022-02-15 02:13:49,887 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:13:49,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:13:49,888 INFO L85 PathProgramCache]: Analyzing trace with hash 720673822, now seen corresponding path program 173 times
[2022-02-15 02:13:49,888 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:13:49,888 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1614287503]
[2022-02-15 02:13:49,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:13:49,923 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:13:49,965 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:13:49,965 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:13:49,998 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:13:50,040 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:13:50,040 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:13:50,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:13:50,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:13:50,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:13:50,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:13:50,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:13:50,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:13:50,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:13:51,095 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:13:51,095 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1614287503]
[2022-02-15 02:13:51,095 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1614287503] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:13:51,095 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:13:51,095 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30
[2022-02-15 02:13:51,095 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355395803]
[2022-02-15 02:13:51,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:13:51,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states
[2022-02-15 02:13:51,096 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:13:51,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants.
[2022-02-15 02:13:51,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=886, Unknown=0, NotChecked=0, Total=992
[2022-02-15 02:13:51,096 INFO L87 Difference]: Start difference. First operand 586 states and 688 transitions. Second operand has 30 states, 30 states have (on average 2.533333333333333) internal successors, (76), 29 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:13:54,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:13:55,000 INFO L93 Difference]: Finished difference Result 1228 states and 1415 transitions.
[2022-02-15 02:13:55,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states.
[2022-02-15 02:13:55,000 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.533333333333333) internal successors, (76), 29 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 82
[2022-02-15 02:13:55,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:13:55,001 INFO L225 Difference]: With dead ends: 1228
[2022-02-15 02:13:55,001 INFO L226 Difference]: Without dead ends: 760
[2022-02-15 02:13:55,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 12 SyntacticMatches, 36 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=129, Invalid=1061, Unknown=0, NotChecked=0, Total=1190
[2022-02-15 02:13:55,001 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 53 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 2353 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 2367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 2353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time
[2022-02-15 02:13:55,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 63 Invalid, 2367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 2353 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time]
[2022-02-15 02:13:55,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states.
[2022-02-15 02:13:56,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 586.
[2022-02-15 02:13:56,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 571 states have (on average 1.1751313485113835) internal successors, (671), 574 states have internal predecessors, (671), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:13:56,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 688 transitions.
[2022-02-15 02:13:56,679 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 688 transitions. Word has length 82
[2022-02-15 02:13:56,679 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:13:56,679 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 688 transitions.
[2022-02-15 02:13:56,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.533333333333333) internal successors, (76), 29 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:13:56,679 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 688 transitions.
[2022-02-15 02:13:56,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83
[2022-02-15 02:13:56,679 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:13:56,679 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 17, 3, 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 02:13:56,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189
[2022-02-15 02:13:56,680 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:13:56,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:13:56,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1399946076, now seen corresponding path program 174 times
[2022-02-15 02:13:56,680 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:13:56,680 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1018185652]
[2022-02-15 02:13:56,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:13:56,714 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:13:56,756 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:13:56,756 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:13:56,802 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:13:56,843 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:13:56,843 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:13:56,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:13:56,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:13:56,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:13:56,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:13:56,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:13:56,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:13:56,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:13:57,830 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:13:57,831 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1018185652]
[2022-02-15 02:13:57,831 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1018185652] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:13:57,831 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:13:57,831 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31
[2022-02-15 02:13:57,831 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144845594]
[2022-02-15 02:13:57,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:13:57,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states
[2022-02-15 02:13:57,831 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:13:57,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants.
[2022-02-15 02:13:57,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=942, Unknown=0, NotChecked=0, Total=1056
[2022-02-15 02:13:57,831 INFO L87 Difference]: Start difference. First operand 586 states and 688 transitions. Second operand has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:14:02,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:14:02,091 INFO L93 Difference]: Finished difference Result 1219 states and 1406 transitions.
[2022-02-15 02:14:02,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states.
[2022-02-15 02:14:02,092 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 82
[2022-02-15 02:14:02,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:14:02,093 INFO L225 Difference]: With dead ends: 1219
[2022-02-15 02:14:02,093 INFO L226 Difference]: Without dead ends: 751
[2022-02-15 02:14:02,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 12 SyntacticMatches, 35 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=139, Invalid=1121, Unknown=0, NotChecked=0, Total=1260
[2022-02-15 02:14:02,093 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 52 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 2760 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 2775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 2760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time
[2022-02-15 02:14:02,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 73 Invalid, 2775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 2760 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time]
[2022-02-15 02:14:02,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states.
[2022-02-15 02:14:03,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 586.
[2022-02-15 02:14:03,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 571 states have (on average 1.1751313485113835) internal successors, (671), 574 states have internal predecessors, (671), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:14:03,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 688 transitions.
[2022-02-15 02:14:03,944 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 688 transitions. Word has length 82
[2022-02-15 02:14:03,944 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:14:03,944 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 688 transitions.
[2022-02-15 02:14:03,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:14:03,945 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 688 transitions.
[2022-02-15 02:14:03,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83
[2022-02-15 02:14:03,945 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:14:03,945 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 16, 4, 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 02:14:03,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190
[2022-02-15 02:14:03,946 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:14:03,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:14:03,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1960645854, now seen corresponding path program 175 times
[2022-02-15 02:14:03,947 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:14:03,947 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [735952118]
[2022-02-15 02:14:03,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:14:03,983 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:14:04,025 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:14:04,026 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:14:04,072 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:14:04,104 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:14:04,104 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:14:04,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:14:04,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:14:04,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:14:04,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:14:04,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:14:04,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:14:04,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:14:05,094 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:14:05,095 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [735952118]
[2022-02-15 02:14:05,095 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [735952118] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:14:05,095 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:14:05,095 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32
[2022-02-15 02:14:05,095 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226168240]
[2022-02-15 02:14:05,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:14:05,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states
[2022-02-15 02:14:05,095 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:14:05,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants.
[2022-02-15 02:14:05,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1000, Unknown=0, NotChecked=0, Total=1122
[2022-02-15 02:14:05,096 INFO L87 Difference]: Start difference. First operand 586 states and 688 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:14:09,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:14:09,286 INFO L93 Difference]: Finished difference Result 1210 states and 1397 transitions.
[2022-02-15 02:14:09,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states.
[2022-02-15 02:14:09,286 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 82
[2022-02-15 02:14:09,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:14:09,287 INFO L225 Difference]: With dead ends: 1210
[2022-02-15 02:14:09,287 INFO L226 Difference]: Without dead ends: 742
[2022-02-15 02:14:09,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 12 SyntacticMatches, 34 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=149, Invalid=1183, Unknown=0, NotChecked=0, Total=1332
[2022-02-15 02:14:09,288 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 55 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 2787 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 2803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 2787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time
[2022-02-15 02:14:09,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 76 Invalid, 2803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 2787 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time]
[2022-02-15 02:14:09,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states.
[2022-02-15 02:14:11,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 586.
[2022-02-15 02:14:11,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 571 states have (on average 1.1751313485113835) internal successors, (671), 574 states have internal predecessors, (671), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:14:11,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 688 transitions.
[2022-02-15 02:14:11,174 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 688 transitions. Word has length 82
[2022-02-15 02:14:11,174 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:14:11,174 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 688 transitions.
[2022-02-15 02:14:11,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:14:11,174 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 688 transitions.
[2022-02-15 02:14:11,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83
[2022-02-15 02:14:11,174 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:14:11,175 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 15, 5, 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 02:14:11,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191
[2022-02-15 02:14:11,175 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:14:11,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:14:11,175 INFO L85 PathProgramCache]: Analyzing trace with hash 2001320604, now seen corresponding path program 176 times
[2022-02-15 02:14:11,175 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:14:11,175 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [3501291]
[2022-02-15 02:14:11,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:14:11,222 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:14:11,255 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:14:11,255 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:14:11,289 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:14:11,322 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:14:11,322 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:14:11,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:14:11,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:14:11,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:14:11,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:14:11,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:14:11,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:14:11,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:14:12,329 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:14:12,329 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [3501291]
[2022-02-15 02:14:12,329 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [3501291] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:14:12,329 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:14:12,329 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33
[2022-02-15 02:14:12,329 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395169918]
[2022-02-15 02:14:12,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:14:12,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states
[2022-02-15 02:14:12,330 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:14:12,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants.
[2022-02-15 02:14:12,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1060, Unknown=0, NotChecked=0, Total=1190
[2022-02-15 02:14:12,330 INFO L87 Difference]: Start difference. First operand 586 states and 688 transitions. Second operand has 33 states, 33 states have (on average 2.303030303030303) internal successors, (76), 32 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:14:16,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:14:16,354 INFO L93 Difference]: Finished difference Result 1201 states and 1388 transitions.
[2022-02-15 02:14:16,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states.
[2022-02-15 02:14:16,354 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.303030303030303) internal successors, (76), 32 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 82
[2022-02-15 02:14:16,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:14:16,355 INFO L225 Difference]: With dead ends: 1201
[2022-02-15 02:14:16,355 INFO L226 Difference]: Without dead ends: 733
[2022-02-15 02:14:16,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 12 SyntacticMatches, 33 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=159, Invalid=1247, Unknown=0, NotChecked=0, Total=1406
[2022-02-15 02:14:16,356 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 59 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 2351 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 2368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 2351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time
[2022-02-15 02:14:16,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 70 Invalid, 2368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 2351 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time]
[2022-02-15 02:14:16,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states.
[2022-02-15 02:14:18,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 586.
[2022-02-15 02:14:18,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 571 states have (on average 1.1751313485113835) internal successors, (671), 574 states have internal predecessors, (671), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:14:18,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 688 transitions.
[2022-02-15 02:14:18,232 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 688 transitions. Word has length 82
[2022-02-15 02:14:18,232 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:14:18,232 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 688 transitions.
[2022-02-15 02:14:18,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.303030303030303) internal successors, (76), 32 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:14:18,232 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 688 transitions.
[2022-02-15 02:14:18,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83
[2022-02-15 02:14:18,232 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:14:18,232 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 14, 6, 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 02:14:18,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192
[2022-02-15 02:14:18,232 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:14:18,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:14:18,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1849746018, now seen corresponding path program 177 times
[2022-02-15 02:14:18,233 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:14:18,233 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [369865921]
[2022-02-15 02:14:18,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:14:18,267 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:14:18,309 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:14:18,310 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:14:18,343 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:14:18,385 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:14:18,385 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:14:18,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:14:18,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:14:18,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:14:18,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:14:18,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:14:18,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:14:18,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:14:19,408 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:14:19,409 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [369865921]
[2022-02-15 02:14:19,409 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [369865921] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:14:19,409 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:14:19,409 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34
[2022-02-15 02:14:19,409 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942952587]
[2022-02-15 02:14:19,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:14:19,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states
[2022-02-15 02:14:19,409 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:14:19,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants.
[2022-02-15 02:14:19,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1185, Unknown=0, NotChecked=0, Total=1332
[2022-02-15 02:14:19,410 INFO L87 Difference]: Start difference. First operand 586 states and 688 transitions. Second operand has 34 states, 34 states have (on average 2.235294117647059) internal successors, (76), 33 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:14:23,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:14:23,387 INFO L93 Difference]: Finished difference Result 1195 states and 1378 transitions.
[2022-02-15 02:14:23,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states.
[2022-02-15 02:14:23,387 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.235294117647059) internal successors, (76), 33 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 82
[2022-02-15 02:14:23,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:14:23,388 INFO L225 Difference]: With dead ends: 1195
[2022-02-15 02:14:23,388 INFO L226 Difference]: Without dead ends: 727
[2022-02-15 02:14:23,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 12 SyntacticMatches, 32 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 988 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=168, Invalid=1314, Unknown=0, NotChecked=0, Total=1482
[2022-02-15 02:14:23,389 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 64 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 2018 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 2036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 2018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time
[2022-02-15 02:14:23,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 61 Invalid, 2036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 2018 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time]
[2022-02-15 02:14:23,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states.
[2022-02-15 02:14:25,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 586.
[2022-02-15 02:14:25,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 571 states have (on average 1.1751313485113835) internal successors, (671), 574 states have internal predecessors, (671), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:14:25,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 688 transitions.
[2022-02-15 02:14:25,308 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 688 transitions. Word has length 82
[2022-02-15 02:14:25,308 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:14:25,308 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 688 transitions.
[2022-02-15 02:14:25,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.235294117647059) internal successors, (76), 33 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:14:25,308 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 688 transitions.
[2022-02-15 02:14:25,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83
[2022-02-15 02:14:25,308 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:14:25,308 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 13, 7, 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 02:14:25,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193
[2022-02-15 02:14:25,308 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:14:25,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:14:25,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1964141020, now seen corresponding path program 178 times
[2022-02-15 02:14:25,309 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:14:25,309 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1628176243]
[2022-02-15 02:14:25,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:14:25,343 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:14:25,385 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:14:25,386 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:14:25,419 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:14:25,461 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:14:25,461 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:14:25,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:14:25,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:14:25,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:14:25,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:14:25,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:14:25,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:14:25,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:14:26,485 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:14:26,485 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1628176243]
[2022-02-15 02:14:26,485 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1628176243] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:14:26,485 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:14:26,485 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35
[2022-02-15 02:14:26,485 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321119628]
[2022-02-15 02:14:26,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:14:26,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states
[2022-02-15 02:14:26,485 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:14:26,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants.
[2022-02-15 02:14:26,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1186, Unknown=0, NotChecked=0, Total=1332
[2022-02-15 02:14:26,486 INFO L87 Difference]: Start difference. First operand 586 states and 688 transitions. Second operand has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 34 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:14:30,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:14:30,431 INFO L93 Difference]: Finished difference Result 1183 states and 1370 transitions.
[2022-02-15 02:14:30,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states.
[2022-02-15 02:14:30,431 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 34 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 82
[2022-02-15 02:14:30,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:14:30,432 INFO L225 Difference]: With dead ends: 1183
[2022-02-15 02:14:30,432 INFO L226 Difference]: Without dead ends: 715
[2022-02-15 02:14:30,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 12 SyntacticMatches, 31 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1000 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=179, Invalid=1381, Unknown=0, NotChecked=0, Total=1560
[2022-02-15 02:14:30,433 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 63 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 2618 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 2637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 2618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time
[2022-02-15 02:14:30,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 64 Invalid, 2637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 2618 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time]
[2022-02-15 02:14:30,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states.
[2022-02-15 02:14:32,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 586.
[2022-02-15 02:14:32,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 571 states have (on average 1.1751313485113835) internal successors, (671), 574 states have internal predecessors, (671), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:14:32,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 688 transitions.
[2022-02-15 02:14:32,363 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 688 transitions. Word has length 82
[2022-02-15 02:14:32,363 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:14:32,363 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 688 transitions.
[2022-02-15 02:14:32,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 34 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:14:32,364 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 688 transitions.
[2022-02-15 02:14:32,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83
[2022-02-15 02:14:32,364 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:14:32,364 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 12, 8, 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 02:14:32,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194
[2022-02-15 02:14:32,364 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:14:32,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:14:32,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1611052638, now seen corresponding path program 179 times
[2022-02-15 02:14:32,364 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:14:32,364 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1927026321]
[2022-02-15 02:14:32,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:14:32,415 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:14:32,457 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:14:32,457 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:14:32,503 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:14:32,535 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:14:32,535 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:14:32,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:14:32,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:14:32,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:14:32,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:14:32,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:14:32,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:14:32,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:14:33,552 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:14:33,552 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1927026321]
[2022-02-15 02:14:33,553 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1927026321] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:14:33,553 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:14:33,553 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36
[2022-02-15 02:14:33,553 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558042081]
[2022-02-15 02:14:33,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:14:33,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states
[2022-02-15 02:14:33,553 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:14:33,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants.
[2022-02-15 02:14:33,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1252, Unknown=0, NotChecked=0, Total=1406
[2022-02-15 02:14:33,553 INFO L87 Difference]: Start difference. First operand 586 states and 688 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:14:37,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:14:37,393 INFO L93 Difference]: Finished difference Result 1174 states and 1361 transitions.
[2022-02-15 02:14:37,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states.
[2022-02-15 02:14:37,393 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 82
[2022-02-15 02:14:37,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:14:37,394 INFO L225 Difference]: With dead ends: 1174
[2022-02-15 02:14:37,394 INFO L226 Difference]: Without dead ends: 706
[2022-02-15 02:14:37,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 12 SyntacticMatches, 30 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1054 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=189, Invalid=1451, Unknown=0, NotChecked=0, Total=1640
[2022-02-15 02:14:37,395 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 71 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 2790 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 2810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 2790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time
[2022-02-15 02:14:37,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 62 Invalid, 2810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 2790 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time]
[2022-02-15 02:14:37,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states.
[2022-02-15 02:14:39,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 586.
[2022-02-15 02:14:39,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 571 states have (on average 1.1751313485113835) internal successors, (671), 574 states have internal predecessors, (671), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:14:39,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 688 transitions.
[2022-02-15 02:14:39,304 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 688 transitions. Word has length 82
[2022-02-15 02:14:39,304 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:14:39,304 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 688 transitions.
[2022-02-15 02:14:39,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:14:39,304 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 688 transitions.
[2022-02-15 02:14:39,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83
[2022-02-15 02:14:39,305 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:14:39,305 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 11, 9, 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 02:14:39,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195
[2022-02-15 02:14:39,305 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:14:39,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:14:39,305 INFO L85 PathProgramCache]: Analyzing trace with hash -438335204, now seen corresponding path program 180 times
[2022-02-15 02:14:39,305 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:14:39,305 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [483111170]
[2022-02-15 02:14:39,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:14:39,339 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:14:39,372 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:14:39,372 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:14:39,418 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:14:39,459 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:14:39,460 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:14:39,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:14:39,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:14:39,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:14:39,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:14:39,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:14:39,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:14:39,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:14:40,510 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:14:40,510 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [483111170]
[2022-02-15 02:14:40,510 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [483111170] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:14:40,510 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:14:40,510 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37
[2022-02-15 02:14:40,510 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365245411]
[2022-02-15 02:14:40,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:14:40,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states
[2022-02-15 02:14:40,510 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:14:40,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants.
[2022-02-15 02:14:40,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1320, Unknown=0, NotChecked=0, Total=1482
[2022-02-15 02:14:40,511 INFO L87 Difference]: Start difference. First operand 586 states and 688 transitions. Second operand has 37 states, 37 states have (on average 2.054054054054054) internal successors, (76), 36 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:14:44,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:14:44,144 INFO L93 Difference]: Finished difference Result 1165 states and 1352 transitions.
[2022-02-15 02:14:44,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states.
[2022-02-15 02:14:44,145 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.054054054054054) internal successors, (76), 36 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 82
[2022-02-15 02:14:44,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:14:44,145 INFO L225 Difference]: With dead ends: 1165
[2022-02-15 02:14:44,145 INFO L226 Difference]: Without dead ends: 697
[2022-02-15 02:14:44,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 12 SyntacticMatches, 29 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=199, Invalid=1523, Unknown=0, NotChecked=0, Total=1722
[2022-02-15 02:14:44,146 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 72 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 2375 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 2396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 2375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time
[2022-02-15 02:14:44,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 63 Invalid, 2396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 2375 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time]
[2022-02-15 02:14:44,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states.
[2022-02-15 02:14:46,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 586.
[2022-02-15 02:14:46,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 571 states have (on average 1.1751313485113835) internal successors, (671), 574 states have internal predecessors, (671), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:14:46,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 688 transitions.
[2022-02-15 02:14:46,072 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 688 transitions. Word has length 82
[2022-02-15 02:14:46,072 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:14:46,072 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 688 transitions.
[2022-02-15 02:14:46,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.054054054054054) internal successors, (76), 36 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:14:46,072 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 688 transitions.
[2022-02-15 02:14:46,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83
[2022-02-15 02:14:46,072 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:14:46,072 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 10, 10, 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 02:14:46,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196
[2022-02-15 02:14:46,073 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:14:46,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:14:46,073 INFO L85 PathProgramCache]: Analyzing trace with hash -14688482, now seen corresponding path program 181 times
[2022-02-15 02:14:46,073 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:14:46,073 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1861840897]
[2022-02-15 02:14:46,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:14:46,108 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:14:46,152 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:14:46,152 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:14:46,186 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:14:46,228 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:14:46,228 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:14:46,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:14:46,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:14:46,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:14:46,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:14:46,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:14:46,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:14:46,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:14:47,289 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:14:47,289 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1861840897]
[2022-02-15 02:14:47,289 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1861840897] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:14:47,289 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:14:47,290 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38
[2022-02-15 02:14:47,290 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130487111]
[2022-02-15 02:14:47,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:14:47,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states
[2022-02-15 02:14:47,290 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:14:47,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants.
[2022-02-15 02:14:47,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1390, Unknown=0, NotChecked=0, Total=1560
[2022-02-15 02:14:47,290 INFO L87 Difference]: Start difference. First operand 586 states and 688 transitions. Second operand has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:14:50,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:14:50,891 INFO L93 Difference]: Finished difference Result 1156 states and 1343 transitions.
[2022-02-15 02:14:50,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states.
[2022-02-15 02:14:50,891 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 82
[2022-02-15 02:14:50,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:14:50,892 INFO L225 Difference]: With dead ends: 1156
[2022-02-15 02:14:50,892 INFO L226 Difference]: Without dead ends: 688
[2022-02-15 02:14:50,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 12 SyntacticMatches, 28 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1135 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=209, Invalid=1597, Unknown=0, NotChecked=0, Total=1806
[2022-02-15 02:14:50,893 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 71 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 3175 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 3197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 3175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time
[2022-02-15 02:14:50,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 80 Invalid, 3197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 3175 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time]
[2022-02-15 02:14:50,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states.
[2022-02-15 02:14:52,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 586.
[2022-02-15 02:14:52,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 571 states have (on average 1.1751313485113835) internal successors, (671), 574 states have internal predecessors, (671), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:14:52,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 688 transitions.
[2022-02-15 02:14:52,707 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 688 transitions. Word has length 82
[2022-02-15 02:14:52,707 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:14:52,707 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 688 transitions.
[2022-02-15 02:14:52,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:14:52,707 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 688 transitions.
[2022-02-15 02:14:52,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83
[2022-02-15 02:14:52,708 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:14:52,708 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 11, 9, 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 02:14:52,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197
[2022-02-15 02:14:52,708 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:14:52,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:14:52,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1044047780, now seen corresponding path program 182 times
[2022-02-15 02:14:52,708 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:14:52,708 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1911011288]
[2022-02-15 02:14:52,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:14:52,755 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:14:52,798 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:14:52,798 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:14:52,836 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:14:52,868 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:14:52,868 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:14:52,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:14:52,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:14:52,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:14:52,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:14:52,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:14:52,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:14:52,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:14:53,906 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:14:53,906 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1911011288]
[2022-02-15 02:14:53,906 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1911011288] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:14:53,906 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:14:53,906 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39
[2022-02-15 02:14:53,906 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494121300]
[2022-02-15 02:14:53,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:14:53,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states
[2022-02-15 02:14:53,906 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:14:53,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants.
[2022-02-15 02:14:53,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1462, Unknown=0, NotChecked=0, Total=1640
[2022-02-15 02:14:53,907 INFO L87 Difference]: Start difference. First operand 586 states and 688 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:14:57,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:14:57,238 INFO L93 Difference]: Finished difference Result 1147 states and 1334 transitions.
[2022-02-15 02:14:57,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states.
[2022-02-15 02:14:57,238 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 82
[2022-02-15 02:14:57,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:14:57,239 INFO L225 Difference]: With dead ends: 1147
[2022-02-15 02:14:57,239 INFO L226 Difference]: Without dead ends: 679
[2022-02-15 02:14:57,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 12 SyntacticMatches, 27 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1162 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=219, Invalid=1673, Unknown=0, NotChecked=0, Total=1892
[2022-02-15 02:14:57,240 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 81 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 2456 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 2479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 2456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time
[2022-02-15 02:14:57,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 64 Invalid, 2479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 2456 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time]
[2022-02-15 02:14:57,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states.
[2022-02-15 02:14:59,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 586.
[2022-02-15 02:14:59,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 571 states have (on average 1.1751313485113835) internal successors, (671), 574 states have internal predecessors, (671), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:14:59,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 688 transitions.
[2022-02-15 02:14:59,056 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 688 transitions. Word has length 82
[2022-02-15 02:14:59,056 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:14:59,056 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 688 transitions.
[2022-02-15 02:14:59,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:14:59,056 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 688 transitions.
[2022-02-15 02:14:59,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83
[2022-02-15 02:14:59,056 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:14:59,056 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 12, 8, 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 02:14:59,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198
[2022-02-15 02:14:59,056 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:14:59,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:14:59,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1888053282, now seen corresponding path program 183 times
[2022-02-15 02:14:59,057 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:14:59,057 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2016560857]
[2022-02-15 02:14:59,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:14:59,103 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:14:59,145 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:14:59,145 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:14:59,178 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:14:59,220 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:14:59,220 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:14:59,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:14:59,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:14:59,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:14:59,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:14:59,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:14:59,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:14:59,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:15:00,287 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:15:00,287 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2016560857]
[2022-02-15 02:15:00,287 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2016560857] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:15:00,287 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:15:00,287 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40
[2022-02-15 02:15:00,287 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815255250]
[2022-02-15 02:15:00,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:15:00,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states
[2022-02-15 02:15:00,287 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:15:00,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants.
[2022-02-15 02:15:00,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1536, Unknown=0, NotChecked=0, Total=1722
[2022-02-15 02:15:00,288 INFO L87 Difference]: Start difference. First operand 586 states and 688 transitions. Second operand has 40 states, 40 states have (on average 1.9) internal successors, (76), 39 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:15:03,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:15:03,704 INFO L93 Difference]: Finished difference Result 1138 states and 1325 transitions.
[2022-02-15 02:15:03,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states.
[2022-02-15 02:15:03,705 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.9) internal successors, (76), 39 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 82
[2022-02-15 02:15:03,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:15:03,705 INFO L225 Difference]: With dead ends: 1138
[2022-02-15 02:15:03,705 INFO L226 Difference]: Without dead ends: 670
[2022-02-15 02:15:03,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 12 SyntacticMatches, 26 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1180 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=229, Invalid=1751, Unknown=0, NotChecked=0, Total=1980
[2022-02-15 02:15:03,706 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 80 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 3232 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 3256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 3232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time
[2022-02-15 02:15:03,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 80 Invalid, 3256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 3232 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time]
[2022-02-15 02:15:03,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states.
[2022-02-15 02:15:05,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 586.
[2022-02-15 02:15:05,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 571 states have (on average 1.1751313485113835) internal successors, (671), 574 states have internal predecessors, (671), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:15:05,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 688 transitions.
[2022-02-15 02:15:05,514 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 688 transitions. Word has length 82
[2022-02-15 02:15:05,514 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:15:05,514 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 688 transitions.
[2022-02-15 02:15:05,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.9) internal successors, (76), 39 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:15:05,515 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 688 transitions.
[2022-02-15 02:15:05,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83
[2022-02-15 02:15:05,515 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:15:05,515 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 13, 7, 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 02:15:05,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199
[2022-02-15 02:15:05,515 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:15:05,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:15:05,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1613293668, now seen corresponding path program 184 times
[2022-02-15 02:15:05,515 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:15:05,515 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1471589231]
[2022-02-15 02:15:05,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:15:05,561 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:15:05,603 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:15:05,604 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:15:05,637 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:15:05,678 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:15:05,678 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:15:05,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:15:05,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:15:05,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:15:05,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:15:05,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:15:05,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:15:05,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:15:06,768 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:15:06,768 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1471589231]
[2022-02-15 02:15:06,768 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1471589231] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:15:06,768 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:15:06,768 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41
[2022-02-15 02:15:06,768 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255743632]
[2022-02-15 02:15:06,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:15:06,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states
[2022-02-15 02:15:06,768 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:15:06,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants.
[2022-02-15 02:15:06,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1612, Unknown=0, NotChecked=0, Total=1806
[2022-02-15 02:15:06,769 INFO L87 Difference]: Start difference. First operand 586 states and 688 transitions. Second operand has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:15:09,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:15:09,953 INFO L93 Difference]: Finished difference Result 1129 states and 1316 transitions.
[2022-02-15 02:15:09,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states.
[2022-02-15 02:15:09,953 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 82
[2022-02-15 02:15:09,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:15:09,954 INFO L225 Difference]: With dead ends: 1129
[2022-02-15 02:15:09,954 INFO L226 Difference]: Without dead ends: 661
[2022-02-15 02:15:09,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 12 SyntacticMatches, 25 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1189 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=239, Invalid=1831, Unknown=0, NotChecked=0, Total=2070
[2022-02-15 02:15:09,954 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 88 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 2823 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 2848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 2823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time
[2022-02-15 02:15:09,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 59 Invalid, 2848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 2823 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time]
[2022-02-15 02:15:09,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states.
[2022-02-15 02:15:11,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 586.
[2022-02-15 02:15:11,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 571 states have (on average 1.1751313485113835) internal successors, (671), 574 states have internal predecessors, (671), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:15:11,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 688 transitions.
[2022-02-15 02:15:11,776 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 688 transitions. Word has length 82
[2022-02-15 02:15:11,776 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:15:11,776 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 688 transitions.
[2022-02-15 02:15:11,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:15:11,776 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 688 transitions.
[2022-02-15 02:15:11,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83
[2022-02-15 02:15:11,777 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:15:11,777 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 14, 6, 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 02:15:11,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200
[2022-02-15 02:15:11,777 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:15:11,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:15:11,777 INFO L85 PathProgramCache]: Analyzing trace with hash -227090274, now seen corresponding path program 185 times
[2022-02-15 02:15:11,777 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:15:11,777 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1884490355]
[2022-02-15 02:15:11,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:15:11,825 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:15:11,857 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:15:11,857 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:15:11,890 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:15:11,933 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:15:11,933 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:15:11,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:15:11,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:15:11,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:15:11,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:15:11,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:15:11,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:15:11,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:15:13,029 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:15:13,029 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1884490355]
[2022-02-15 02:15:13,029 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1884490355] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:15:13,029 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:15:13,029 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42
[2022-02-15 02:15:13,029 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482738550]
[2022-02-15 02:15:13,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:15:13,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states
[2022-02-15 02:15:13,029 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:15:13,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants.
[2022-02-15 02:15:13,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1690, Unknown=0, NotChecked=0, Total=1892
[2022-02-15 02:15:13,030 INFO L87 Difference]: Start difference. First operand 586 states and 688 transitions. Second operand has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 41 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:15:16,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:15:16,205 INFO L93 Difference]: Finished difference Result 1120 states and 1307 transitions.
[2022-02-15 02:15:16,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states.
[2022-02-15 02:15:16,206 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 41 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 82
[2022-02-15 02:15:16,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:15:16,206 INFO L225 Difference]: With dead ends: 1120
[2022-02-15 02:15:16,207 INFO L226 Difference]: Without dead ends: 652
[2022-02-15 02:15:16,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 12 SyntacticMatches, 24 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1189 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=249, Invalid=1913, Unknown=0, NotChecked=0, Total=2162
[2022-02-15 02:15:16,207 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 76 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 3050 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 3076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 3050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time
[2022-02-15 02:15:16,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 79 Invalid, 3076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 3050 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time]
[2022-02-15 02:15:16,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states.
[2022-02-15 02:15:18,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 586.
[2022-02-15 02:15:18,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 571 states have (on average 1.1751313485113835) internal successors, (671), 574 states have internal predecessors, (671), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:15:18,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 688 transitions.
[2022-02-15 02:15:18,028 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 688 transitions. Word has length 82
[2022-02-15 02:15:18,028 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:15:18,028 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 688 transitions.
[2022-02-15 02:15:18,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 41 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:15:18,028 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 688 transitions.
[2022-02-15 02:15:18,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83
[2022-02-15 02:15:18,028 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:15:18,028 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 15, 5, 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 02:15:18,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201
[2022-02-15 02:15:18,028 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:15:18,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:15:18,029 INFO L85 PathProgramCache]: Analyzing trace with hash -165050660, now seen corresponding path program 186 times
[2022-02-15 02:15:18,029 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:15:18,029 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1691718609]
[2022-02-15 02:15:18,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:15:18,063 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:15:18,104 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:15:18,104 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:15:18,149 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:15:18,192 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:15:18,192 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:15:18,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:15:18,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:15:18,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:15:18,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:15:18,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:15:18,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:15:18,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:15:19,277 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:15:19,277 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1691718609]
[2022-02-15 02:15:19,277 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1691718609] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:15:19,278 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:15:19,278 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43
[2022-02-15 02:15:19,278 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92916933]
[2022-02-15 02:15:19,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:15:19,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states
[2022-02-15 02:15:19,278 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:15:19,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants.
[2022-02-15 02:15:19,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1851, Unknown=0, NotChecked=0, Total=2070
[2022-02-15 02:15:19,278 INFO L87 Difference]: Start difference. First operand 586 states and 688 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:15:22,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:15:22,990 INFO L93 Difference]: Finished difference Result 1141 states and 1324 transitions.
[2022-02-15 02:15:22,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states.
[2022-02-15 02:15:22,990 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 82
[2022-02-15 02:15:22,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:15:22,991 INFO L225 Difference]: With dead ends: 1141
[2022-02-15 02:15:22,991 INFO L226 Difference]: Without dead ends: 673
[2022-02-15 02:15:22,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 12 SyntacticMatches, 23 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1213 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=258, Invalid=1998, Unknown=0, NotChecked=0, Total=2256
[2022-02-15 02:15:22,992 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 98 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 3216 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 3246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 3216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time
[2022-02-15 02:15:22,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 64 Invalid, 3246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 3216 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time]
[2022-02-15 02:15:22,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states.
[2022-02-15 02:15:24,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 586.
[2022-02-15 02:15:24,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 571 states have (on average 1.1751313485113835) internal successors, (671), 574 states have internal predecessors, (671), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:15:24,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 688 transitions.
[2022-02-15 02:15:24,842 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 688 transitions. Word has length 82
[2022-02-15 02:15:24,843 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:15:24,843 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 688 transitions.
[2022-02-15 02:15:24,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:15:24,843 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 688 transitions.
[2022-02-15 02:15:24,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83
[2022-02-15 02:15:24,843 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:15:24,843 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 16, 4, 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 02:15:24,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202
[2022-02-15 02:15:24,843 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:15:24,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:15:24,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1970488994, now seen corresponding path program 187 times
[2022-02-15 02:15:24,843 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:15:24,844 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1305223686]
[2022-02-15 02:15:24,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:15:24,890 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:15:24,932 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:15:24,932 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:15:24,977 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:15:25,020 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:15:25,020 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:15:25,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:15:25,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:15:25,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:15:25,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:15:25,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:15:25,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:15:25,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:15:26,119 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:15:26,120 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1305223686]
[2022-02-15 02:15:26,120 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1305223686] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:15:26,120 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:15:26,120 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44
[2022-02-15 02:15:26,120 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745825952]
[2022-02-15 02:15:26,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:15:26,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states
[2022-02-15 02:15:26,120 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:15:26,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants.
[2022-02-15 02:15:26,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=1935, Unknown=0, NotChecked=0, Total=2162
[2022-02-15 02:15:26,121 INFO L87 Difference]: Start difference. First operand 586 states and 688 transitions. Second operand has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:15:29,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:15:29,899 INFO L93 Difference]: Finished difference Result 1135 states and 1318 transitions.
[2022-02-15 02:15:29,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states.
[2022-02-15 02:15:29,900 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 82
[2022-02-15 02:15:29,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:15:29,901 INFO L225 Difference]: With dead ends: 1135
[2022-02-15 02:15:29,901 INFO L226 Difference]: Without dead ends: 667
[2022-02-15 02:15:29,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 12 SyntacticMatches, 22 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1193 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=268, Invalid=2084, Unknown=0, NotChecked=0, Total=2352
[2022-02-15 02:15:29,901 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 94 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 3636 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 3666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 3636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time
[2022-02-15 02:15:29,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 81 Invalid, 3666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 3636 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time]
[2022-02-15 02:15:29,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states.
[2022-02-15 02:15:31,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 586.
[2022-02-15 02:15:31,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 571 states have (on average 1.1751313485113835) internal successors, (671), 574 states have internal predecessors, (671), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:15:31,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 688 transitions.
[2022-02-15 02:15:31,775 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 688 transitions. Word has length 82
[2022-02-15 02:15:31,775 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:15:31,775 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 688 transitions.
[2022-02-15 02:15:31,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:15:31,776 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 688 transitions.
[2022-02-15 02:15:31,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83
[2022-02-15 02:15:31,776 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:15:31,776 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 17, 3, 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 02:15:31,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203
[2022-02-15 02:15:31,776 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:15:31,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:15:31,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1506829852, now seen corresponding path program 188 times
[2022-02-15 02:15:31,776 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:15:31,776 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [446464599]
[2022-02-15 02:15:31,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:15:31,822 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:15:31,864 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:15:31,865 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:15:31,898 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:15:31,946 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:15:31,947 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:15:31,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:15:31,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:15:31,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:15:31,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:15:31,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:15:31,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:15:31,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:15:33,066 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:15:33,067 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [446464599]
[2022-02-15 02:15:33,067 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [446464599] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:15:33,067 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:15:33,067 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45
[2022-02-15 02:15:33,067 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208853156]
[2022-02-15 02:15:33,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:15:33,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states
[2022-02-15 02:15:33,067 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:15:33,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants.
[2022-02-15 02:15:33,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=2021, Unknown=0, NotChecked=0, Total=2256
[2022-02-15 02:15:33,068 INFO L87 Difference]: Start difference. First operand 586 states and 688 transitions. Second operand has 45 states, 45 states have (on average 1.6888888888888889) internal successors, (76), 44 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:15:36,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:15:36,646 INFO L93 Difference]: Finished difference Result 1134 states and 1320 transitions.
[2022-02-15 02:15:36,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states.
[2022-02-15 02:15:36,646 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.6888888888888889) internal successors, (76), 44 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 82
[2022-02-15 02:15:36,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:15:36,647 INFO L225 Difference]: With dead ends: 1134
[2022-02-15 02:15:36,647 INFO L226 Difference]: Without dead ends: 666
[2022-02-15 02:15:36,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 12 SyntacticMatches, 21 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1164 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=278, Invalid=2172, Unknown=0, NotChecked=0, Total=2450
[2022-02-15 02:15:36,648 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 119 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 3056 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 3086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 3056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time
[2022-02-15 02:15:36,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 51 Invalid, 3086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 3056 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time]
[2022-02-15 02:15:36,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states.
[2022-02-15 02:15:38,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 586.
[2022-02-15 02:15:38,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 571 states have (on average 1.1751313485113835) internal successors, (671), 574 states have internal predecessors, (671), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:15:38,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 688 transitions.
[2022-02-15 02:15:38,505 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 688 transitions. Word has length 82
[2022-02-15 02:15:38,506 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:15:38,506 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 688 transitions.
[2022-02-15 02:15:38,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.6888888888888889) internal successors, (76), 44 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:15:38,506 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 688 transitions.
[2022-02-15 02:15:38,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83
[2022-02-15 02:15:38,506 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:15:38,506 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 18, 2, 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 02:15:38,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204
[2022-02-15 02:15:38,506 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:15:38,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:15:38,506 INFO L85 PathProgramCache]: Analyzing trace with hash -81518050, now seen corresponding path program 189 times
[2022-02-15 02:15:38,506 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:15:38,507 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1069127939]
[2022-02-15 02:15:38,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:15:38,553 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:15:38,595 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:15:38,596 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:15:38,629 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:15:38,670 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:15:38,670 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:15:38,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:15:38,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:15:38,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:15:38,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:15:38,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:15:38,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:15:38,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:15:39,803 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:15:39,803 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1069127939]
[2022-02-15 02:15:39,804 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1069127939] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:15:39,804 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:15:39,804 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46
[2022-02-15 02:15:39,804 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764571917]
[2022-02-15 02:15:39,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:15:39,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states
[2022-02-15 02:15:39,804 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:15:39,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants.
[2022-02-15 02:15:39,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=2109, Unknown=0, NotChecked=0, Total=2352
[2022-02-15 02:15:39,804 INFO L87 Difference]: Start difference. First operand 586 states and 688 transitions. Second operand has 46 states, 46 states have (on average 1.6521739130434783) internal successors, (76), 45 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:15:43,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:15:43,438 INFO L93 Difference]: Finished difference Result 1127 states and 1310 transitions.
[2022-02-15 02:15:43,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states.
[2022-02-15 02:15:43,439 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.6521739130434783) internal successors, (76), 45 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 82
[2022-02-15 02:15:43,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:15:43,439 INFO L225 Difference]: With dead ends: 1127
[2022-02-15 02:15:43,439 INFO L226 Difference]: Without dead ends: 659
[2022-02-15 02:15:43,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 12 SyntacticMatches, 20 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1126 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=288, Invalid=2262, Unknown=0, NotChecked=0, Total=2550
[2022-02-15 02:15:43,440 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 132 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 3214 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 3245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 3214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time
[2022-02-15 02:15:43,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 44 Invalid, 3245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 3214 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time]
[2022-02-15 02:15:43,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states.
[2022-02-15 02:15:45,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 586.
[2022-02-15 02:15:45,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 571 states have (on average 1.1751313485113835) internal successors, (671), 574 states have internal predecessors, (671), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:15:45,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 688 transitions.
[2022-02-15 02:15:45,334 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 688 transitions. Word has length 82
[2022-02-15 02:15:45,334 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:15:45,334 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 688 transitions.
[2022-02-15 02:15:45,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.6521739130434783) internal successors, (76), 45 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:15:45,335 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 688 transitions.
[2022-02-15 02:15:45,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83
[2022-02-15 02:15:45,335 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:15:45,335 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 19, 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 02:15:45,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205
[2022-02-15 02:15:45,335 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:15:45,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:15:45,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1092635300, now seen corresponding path program 190 times
[2022-02-15 02:15:45,335 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:15:45,336 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [645341784]
[2022-02-15 02:15:45,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:15:45,378 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:15:45,379 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE
[2022-02-15 02:15:45,412 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:15:45,454 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:15:45,454 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:15:45,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:15:45,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:15:45,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:15:45,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:15:45,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:15:45,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:15:45,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:15:46,653 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:15:46,653 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [645341784]
[2022-02-15 02:15:46,653 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [645341784] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:15:46,653 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:15:46,653 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47
[2022-02-15 02:15:46,653 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014579749]
[2022-02-15 02:15:46,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:15:46,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states
[2022-02-15 02:15:46,654 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:15:46,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants.
[2022-02-15 02:15:46,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=2110, Unknown=0, NotChecked=0, Total=2352
[2022-02-15 02:15:46,654 INFO L87 Difference]: Start difference. First operand 586 states and 688 transitions. Second operand has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 46 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:15:49,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:15:49,588 INFO L93 Difference]: Finished difference Result 1102 states and 1299 transitions.
[2022-02-15 02:15:49,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states.
[2022-02-15 02:15:49,589 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 46 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 82
[2022-02-15 02:15:49,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:15:49,589 INFO L225 Difference]: With dead ends: 1102
[2022-02-15 02:15:49,589 INFO L226 Difference]: Without dead ends: 623
[2022-02-15 02:15:49,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 12 SyntacticMatches, 19 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1054 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=299, Invalid=2353, Unknown=0, NotChecked=0, Total=2652
[2022-02-15 02:15:49,590 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 115 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 2894 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 2926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 2894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time
[2022-02-15 02:15:49,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 46 Invalid, 2926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 2894 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time]
[2022-02-15 02:15:49,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states.
[2022-02-15 02:15:51,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 598.
[2022-02-15 02:15:51,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 583 states have (on average 1.1783876500857633) internal successors, (687), 586 states have internal predecessors, (687), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:15:51,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 704 transitions.
[2022-02-15 02:15:51,470 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 704 transitions. Word has length 82
[2022-02-15 02:15:51,470 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:15:51,470 INFO L470 AbstractCegarLoop]: Abstraction has 598 states and 704 transitions.
[2022-02-15 02:15:51,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 46 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:15:51,470 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 704 transitions.
[2022-02-15 02:15:51,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86
[2022-02-15 02:15:51,470 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:15:51,470 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 20, 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 02:15:51,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206
[2022-02-15 02:15:51,470 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:15:51,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:15:51,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1118446753, now seen corresponding path program 191 times
[2022-02-15 02:15:51,471 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:15:51,471 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [234808520]
[2022-02-15 02:15:51,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:15:51,504 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:15:51,547 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:15:51,547 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:15:51,581 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:15:51,622 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:15:51,622 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:15:51,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:15:51,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:15:51,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:15:51,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:15:51,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:15:51,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:15:51,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:15:52,645 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:15:52,645 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [234808520]
[2022-02-15 02:15:52,645 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [234808520] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:15:52,645 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:15:52,645 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30
[2022-02-15 02:15:52,645 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473394992]
[2022-02-15 02:15:52,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:15:52,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states
[2022-02-15 02:15:52,646 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:15:52,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants.
[2022-02-15 02:15:52,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992
[2022-02-15 02:15:52,646 INFO L87 Difference]: Start difference. First operand 598 states and 704 transitions. Second operand has 30 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 29 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:15:57,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:15:57,184 INFO L93 Difference]: Finished difference Result 1258 states and 1452 transitions.
[2022-02-15 02:15:57,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states.
[2022-02-15 02:15:57,184 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 29 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 85
[2022-02-15 02:15:57,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:15:57,185 INFO L225 Difference]: With dead ends: 1258
[2022-02-15 02:15:57,185 INFO L226 Difference]: Without dead ends: 781
[2022-02-15 02:15:57,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 12 SyntacticMatches, 39 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=122, Invalid=1068, Unknown=0, NotChecked=0, Total=1190
[2022-02-15 02:15:57,186 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 50 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 2600 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 2613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 2600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time
[2022-02-15 02:15:57,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 78 Invalid, 2613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 2600 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time]
[2022-02-15 02:15:57,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states.
[2022-02-15 02:15:59,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 607.
[2022-02-15 02:15:59,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 592 states have (on average 1.1756756756756757) internal successors, (696), 595 states have internal predecessors, (696), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:15:59,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 713 transitions.
[2022-02-15 02:15:59,200 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 713 transitions. Word has length 85
[2022-02-15 02:15:59,200 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:15:59,200 INFO L470 AbstractCegarLoop]: Abstraction has 607 states and 713 transitions.
[2022-02-15 02:15:59,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 29 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:15:59,200 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 713 transitions.
[2022-02-15 02:15:59,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86
[2022-02-15 02:15:59,201 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:15:59,201 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 19, 2, 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 02:15:59,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207
[2022-02-15 02:15:59,201 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:15:59,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:15:59,201 INFO L85 PathProgramCache]: Analyzing trace with hash -164506595, now seen corresponding path program 192 times
[2022-02-15 02:15:59,201 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:15:59,201 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [980737734]
[2022-02-15 02:15:59,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:15:59,258 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:15:59,304 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:15:59,304 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:15:59,339 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:15:59,370 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:15:59,370 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:15:59,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:15:59,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:15:59,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:15:59,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:15:59,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:15:59,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:15:59,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:16:00,435 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:16:00,436 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [980737734]
[2022-02-15 02:16:00,436 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [980737734] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:16:00,436 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:16:00,436 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31
[2022-02-15 02:16:00,436 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912460660]
[2022-02-15 02:16:00,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:16:00,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states
[2022-02-15 02:16:00,436 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:16:00,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants.
[2022-02-15 02:16:00,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1004, Unknown=0, NotChecked=0, Total=1122
[2022-02-15 02:16:00,436 INFO L87 Difference]: Start difference. First operand 607 states and 713 transitions. Second operand has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:16:05,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:16:05,018 INFO L93 Difference]: Finished difference Result 1267 states and 1457 transitions.
[2022-02-15 02:16:05,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states.
[2022-02-15 02:16:05,018 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 85
[2022-02-15 02:16:05,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:16:05,019 INFO L225 Difference]: With dead ends: 1267
[2022-02-15 02:16:05,019 INFO L226 Difference]: Without dead ends: 781
[2022-02-15 02:16:05,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 12 SyntacticMatches, 38 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=131, Invalid=1129, Unknown=0, NotChecked=0, Total=1260
[2022-02-15 02:16:05,020 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 48 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 2159 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 2175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 2159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time
[2022-02-15 02:16:05,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 59 Invalid, 2175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 2159 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time]
[2022-02-15 02:16:05,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states.
[2022-02-15 02:16:07,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 607.
[2022-02-15 02:16:07,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 592 states have (on average 1.1756756756756757) internal successors, (696), 595 states have internal predecessors, (696), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:16:07,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 713 transitions.
[2022-02-15 02:16:07,122 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 713 transitions. Word has length 85
[2022-02-15 02:16:07,122 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:16:07,122 INFO L470 AbstractCegarLoop]: Abstraction has 607 states and 713 transitions.
[2022-02-15 02:16:07,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:16:07,122 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 713 transitions.
[2022-02-15 02:16:07,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86
[2022-02-15 02:16:07,123 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:16:07,123 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 18, 3, 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 02:16:07,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208
[2022-02-15 02:16:07,123 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:16:07,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:16:07,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1850686433, now seen corresponding path program 193 times
[2022-02-15 02:16:07,123 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:16:07,123 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [998525925]
[2022-02-15 02:16:07,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:16:07,169 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:16:07,211 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:16:07,211 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:16:07,244 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:16:07,285 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:16:07,285 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:16:07,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:16:07,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:16:07,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:16:07,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:16:07,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:16:07,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:16:07,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:16:08,320 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:16:08,320 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [998525925]
[2022-02-15 02:16:08,320 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [998525925] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:16:08,320 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:16:08,321 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32
[2022-02-15 02:16:08,321 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629302574]
[2022-02-15 02:16:08,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:16:08,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states
[2022-02-15 02:16:08,321 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:16:08,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants.
[2022-02-15 02:16:08,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1005, Unknown=0, NotChecked=0, Total=1122
[2022-02-15 02:16:08,321 INFO L87 Difference]: Start difference. First operand 607 states and 713 transitions. Second operand has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:16:13,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:16:13,059 INFO L93 Difference]: Finished difference Result 1267 states and 1461 transitions.
[2022-02-15 02:16:13,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states.
[2022-02-15 02:16:13,060 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 85
[2022-02-15 02:16:13,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:16:13,061 INFO L225 Difference]: With dead ends: 1267
[2022-02-15 02:16:13,061 INFO L226 Difference]: Without dead ends: 781
[2022-02-15 02:16:13,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 12 SyntacticMatches, 37 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=142, Invalid=1190, Unknown=0, NotChecked=0, Total=1332
[2022-02-15 02:16:13,061 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 55 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 2424 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 2439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 2424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time
[2022-02-15 02:16:13,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 70 Invalid, 2439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 2424 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time]
[2022-02-15 02:16:13,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states.
[2022-02-15 02:16:15,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 607.
[2022-02-15 02:16:15,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 592 states have (on average 1.1756756756756757) internal successors, (696), 595 states have internal predecessors, (696), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:16:15,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 713 transitions.
[2022-02-15 02:16:15,209 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 713 transitions. Word has length 85
[2022-02-15 02:16:15,209 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:16:15,209 INFO L470 AbstractCegarLoop]: Abstraction has 607 states and 713 transitions.
[2022-02-15 02:16:15,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:16:15,209 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 713 transitions.
[2022-02-15 02:16:15,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86
[2022-02-15 02:16:15,209 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:16:15,209 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 17, 4, 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 02:16:15,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209
[2022-02-15 02:16:15,210 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:16:15,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:16:15,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1171414179, now seen corresponding path program 194 times
[2022-02-15 02:16:15,210 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:16:15,210 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [159514286]
[2022-02-15 02:16:15,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:16:15,244 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:16:15,287 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:16:15,287 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:16:15,320 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:16:15,360 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:16:15,361 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:16:15,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:16:15,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:16:15,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:16:15,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:16:15,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:16:15,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:16:15,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:16:16,400 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:16:16,401 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [159514286]
[2022-02-15 02:16:16,401 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [159514286] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:16:16,401 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:16:16,401 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33
[2022-02-15 02:16:16,401 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794387948]
[2022-02-15 02:16:16,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:16:16,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states
[2022-02-15 02:16:16,401 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:16:16,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants.
[2022-02-15 02:16:16,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1065, Unknown=0, NotChecked=0, Total=1190
[2022-02-15 02:16:16,402 INFO L87 Difference]: Start difference. First operand 607 states and 713 transitions. Second operand has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:16:21,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:16:21,241 INFO L93 Difference]: Finished difference Result 1258 states and 1452 transitions.
[2022-02-15 02:16:21,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states.
[2022-02-15 02:16:21,242 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 85
[2022-02-15 02:16:21,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:16:21,242 INFO L225 Difference]: With dead ends: 1258
[2022-02-15 02:16:21,242 INFO L226 Difference]: Without dead ends: 772
[2022-02-15 02:16:21,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 12 SyntacticMatches, 36 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=152, Invalid=1254, Unknown=0, NotChecked=0, Total=1406
[2022-02-15 02:16:21,243 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 60 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 2832 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 2848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 2832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time
[2022-02-15 02:16:21,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 68 Invalid, 2848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 2832 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time]
[2022-02-15 02:16:21,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states.
[2022-02-15 02:16:23,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 607.
[2022-02-15 02:16:23,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 592 states have (on average 1.1756756756756757) internal successors, (696), 595 states have internal predecessors, (696), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:16:23,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 713 transitions.
[2022-02-15 02:16:23,406 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 713 transitions. Word has length 85
[2022-02-15 02:16:23,406 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:16:23,406 INFO L470 AbstractCegarLoop]: Abstraction has 607 states and 713 transitions.
[2022-02-15 02:16:23,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:16:23,406 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 713 transitions.
[2022-02-15 02:16:23,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86
[2022-02-15 02:16:23,406 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:16:23,406 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 16, 5, 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 02:16:23,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210
[2022-02-15 02:16:23,406 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:16:23,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:16:23,407 INFO L85 PathProgramCache]: Analyzing trace with hash -610714401, now seen corresponding path program 195 times
[2022-02-15 02:16:23,407 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:16:23,407 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1729393146]
[2022-02-15 02:16:23,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:16:23,441 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:16:23,472 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:16:23,472 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:16:23,505 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:16:23,536 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:16:23,537 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:16:23,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:16:23,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:16:23,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:16:23,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:16:23,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:16:23,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:16:23,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:16:24,632 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:16:24,632 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1729393146]
[2022-02-15 02:16:24,632 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1729393146] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:16:24,632 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:16:24,632 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34
[2022-02-15 02:16:24,633 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168473348]
[2022-02-15 02:16:24,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:16:24,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states
[2022-02-15 02:16:24,633 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:16:24,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants.
[2022-02-15 02:16:24,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1190, Unknown=0, NotChecked=0, Total=1332
[2022-02-15 02:16:24,633 INFO L87 Difference]: Start difference. First operand 607 states and 713 transitions. Second operand has 34 states, 34 states have (on average 2.323529411764706) internal successors, (79), 33 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:16:29,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:16:29,404 INFO L93 Difference]: Finished difference Result 1249 states and 1439 transitions.
[2022-02-15 02:16:29,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states.
[2022-02-15 02:16:29,404 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.323529411764706) internal successors, (79), 33 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 85
[2022-02-15 02:16:29,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:16:29,405 INFO L225 Difference]: With dead ends: 1249
[2022-02-15 02:16:29,405 INFO L226 Difference]: Without dead ends: 763
[2022-02-15 02:16:29,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 12 SyntacticMatches, 35 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 969 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=161, Invalid=1321, Unknown=0, NotChecked=0, Total=1482
[2022-02-15 02:16:29,406 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 63 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 2616 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 2634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 2616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time
[2022-02-15 02:16:29,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 52 Invalid, 2634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 2616 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time]
[2022-02-15 02:16:29,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states.
[2022-02-15 02:16:31,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 607.
[2022-02-15 02:16:31,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 592 states have (on average 1.1756756756756757) internal successors, (696), 595 states have internal predecessors, (696), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:16:31,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 713 transitions.
[2022-02-15 02:16:31,630 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 713 transitions. Word has length 85
[2022-02-15 02:16:31,630 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:16:31,630 INFO L470 AbstractCegarLoop]: Abstraction has 607 states and 713 transitions.
[2022-02-15 02:16:31,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.323529411764706) internal successors, (79), 33 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:16:31,630 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 713 transitions.
[2022-02-15 02:16:31,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86
[2022-02-15 02:16:31,630 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:16:31,630 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 15, 6, 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 02:16:31,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211
[2022-02-15 02:16:31,631 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:16:31,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:16:31,631 INFO L85 PathProgramCache]: Analyzing trace with hash -570039651, now seen corresponding path program 196 times
[2022-02-15 02:16:31,631 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:16:31,631 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [103942771]
[2022-02-15 02:16:31,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:16:31,678 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:16:31,710 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:16:31,710 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:16:31,743 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:16:31,788 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:16:31,789 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:16:31,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:16:31,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:16:31,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:16:31,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:16:31,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:16:31,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:16:31,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:16:32,834 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:16:32,835 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [103942771]
[2022-02-15 02:16:32,835 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [103942771] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:16:32,835 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:16:32,835 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35
[2022-02-15 02:16:32,835 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525423597]
[2022-02-15 02:16:32,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:16:32,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states
[2022-02-15 02:16:32,835 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:16:32,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants.
[2022-02-15 02:16:32,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1191, Unknown=0, NotChecked=0, Total=1332
[2022-02-15 02:16:32,835 INFO L87 Difference]: Start difference. First operand 607 states and 713 transitions. Second operand has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 34 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:16:37,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:16:37,532 INFO L93 Difference]: Finished difference Result 1240 states and 1434 transitions.
[2022-02-15 02:16:37,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states.
[2022-02-15 02:16:37,533 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 34 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 85
[2022-02-15 02:16:37,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:16:37,534 INFO L225 Difference]: With dead ends: 1240
[2022-02-15 02:16:37,534 INFO L226 Difference]: Without dead ends: 754
[2022-02-15 02:16:37,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 12 SyntacticMatches, 34 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=172, Invalid=1388, Unknown=0, NotChecked=0, Total=1560
[2022-02-15 02:16:37,534 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 67 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 3031 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 3049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 3031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time
[2022-02-15 02:16:37,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 58 Invalid, 3049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 3031 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time]
[2022-02-15 02:16:37,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states.
[2022-02-15 02:16:39,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 607.
[2022-02-15 02:16:39,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 592 states have (on average 1.1756756756756757) internal successors, (696), 595 states have internal predecessors, (696), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:16:39,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 713 transitions.
[2022-02-15 02:16:39,748 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 713 transitions. Word has length 85
[2022-02-15 02:16:39,748 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:16:39,748 INFO L470 AbstractCegarLoop]: Abstraction has 607 states and 713 transitions.
[2022-02-15 02:16:39,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 34 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:16:39,748 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 713 transitions.
[2022-02-15 02:16:39,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86
[2022-02-15 02:16:39,748 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:16:39,748 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 14, 7, 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 02:16:39,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable212
[2022-02-15 02:16:39,748 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:16:39,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:16:39,749 INFO L85 PathProgramCache]: Analyzing trace with hash -126138977, now seen corresponding path program 197 times
[2022-02-15 02:16:39,749 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:16:39,749 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [269253621]
[2022-02-15 02:16:39,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:16:39,794 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:16:39,836 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:16:39,836 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:16:39,869 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:16:39,910 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:16:39,910 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:16:39,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:16:39,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:16:39,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:16:39,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:16:39,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:16:39,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:16:39,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:16:40,978 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:16:40,978 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [269253621]
[2022-02-15 02:16:40,978 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [269253621] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:16:40,978 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:16:40,978 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36
[2022-02-15 02:16:40,978 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191535688]
[2022-02-15 02:16:40,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:16:40,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states
[2022-02-15 02:16:40,979 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:16:40,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants.
[2022-02-15 02:16:40,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1257, Unknown=0, NotChecked=0, Total=1406
[2022-02-15 02:16:40,979 INFO L87 Difference]: Start difference. First operand 607 states and 713 transitions. Second operand has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 35 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:16:45,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:16:45,597 INFO L93 Difference]: Finished difference Result 1231 states and 1425 transitions.
[2022-02-15 02:16:45,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states.
[2022-02-15 02:16:45,598 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 35 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 85
[2022-02-15 02:16:45,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:16:45,599 INFO L225 Difference]: With dead ends: 1231
[2022-02-15 02:16:45,599 INFO L226 Difference]: Without dead ends: 745
[2022-02-15 02:16:45,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 12 SyntacticMatches, 33 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1060 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=182, Invalid=1458, Unknown=0, NotChecked=0, Total=1640
[2022-02-15 02:16:45,599 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 70 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 3044 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 3063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 3044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time
[2022-02-15 02:16:45,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 61 Invalid, 3063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 3044 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time]
[2022-02-15 02:16:45,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states.
[2022-02-15 02:16:47,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 607.
[2022-02-15 02:16:47,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 592 states have (on average 1.1756756756756757) internal successors, (696), 595 states have internal predecessors, (696), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:16:47,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 713 transitions.
[2022-02-15 02:16:47,836 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 713 transitions. Word has length 85
[2022-02-15 02:16:47,836 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:16:47,836 INFO L470 AbstractCegarLoop]: Abstraction has 607 states and 713 transitions.
[2022-02-15 02:16:47,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 35 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:16:47,836 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 713 transitions.
[2022-02-15 02:16:47,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86
[2022-02-15 02:16:47,837 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:16:47,837 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 13, 8, 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 02:16:47,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable213
[2022-02-15 02:16:47,837 INFO L402 AbstractCegarLoop]: === Iteration 215 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:16:47,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:16:47,837 INFO L85 PathProgramCache]: Analyzing trace with hash -607219235, now seen corresponding path program 198 times
[2022-02-15 02:16:47,837 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:16:47,837 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [971604970]
[2022-02-15 02:16:47,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:16:47,883 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:16:47,923 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:16:47,924 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:16:47,956 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:16:47,997 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:16:47,998 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:16:47,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:16:48,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:16:48,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:16:48,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:16:48,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:16:48,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:16:48,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:16:49,073 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:16:49,074 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [971604970]
[2022-02-15 02:16:49,074 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [971604970] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:16:49,074 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:16:49,074 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37
[2022-02-15 02:16:49,074 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047990828]
[2022-02-15 02:16:49,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:16:49,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states
[2022-02-15 02:16:49,074 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:16:49,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants.
[2022-02-15 02:16:49,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1325, Unknown=0, NotChecked=0, Total=1482
[2022-02-15 02:16:49,075 INFO L87 Difference]: Start difference. First operand 607 states and 713 transitions. Second operand has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:16:53,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:16:53,607 INFO L93 Difference]: Finished difference Result 1222 states and 1416 transitions.
[2022-02-15 02:16:53,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states.
[2022-02-15 02:16:53,607 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 85
[2022-02-15 02:16:53,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:16:53,608 INFO L225 Difference]: With dead ends: 1222
[2022-02-15 02:16:53,608 INFO L226 Difference]: Without dead ends: 736
[2022-02-15 02:16:53,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 12 SyntacticMatches, 32 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1120 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=192, Invalid=1530, Unknown=0, NotChecked=0, Total=1722
[2022-02-15 02:16:53,609 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 67 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 3303 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 3323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 3303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time
[2022-02-15 02:16:53,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 79 Invalid, 3323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 3303 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time]
[2022-02-15 02:16:53,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states.
[2022-02-15 02:16:55,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 607.
[2022-02-15 02:16:55,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 592 states have (on average 1.1756756756756757) internal successors, (696), 595 states have internal predecessors, (696), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:16:55,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 713 transitions.
[2022-02-15 02:16:55,880 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 713 transitions. Word has length 85
[2022-02-15 02:16:55,880 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:16:55,880 INFO L470 AbstractCegarLoop]: Abstraction has 607 states and 713 transitions.
[2022-02-15 02:16:55,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:16:55,880 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 713 transitions.
[2022-02-15 02:16:55,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86
[2022-02-15 02:16:55,880 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:16:55,880 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 12, 9, 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 02:16:55,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214
[2022-02-15 02:16:55,881 INFO L402 AbstractCegarLoop]: === Iteration 216 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:16:55,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:16:55,881 INFO L85 PathProgramCache]: Analyzing trace with hash -960307617, now seen corresponding path program 199 times
[2022-02-15 02:16:55,881 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:16:55,881 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1569792094]
[2022-02-15 02:16:55,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:16:55,928 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:16:55,980 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:16:55,981 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:16:56,027 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:16:56,059 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:16:56,059 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:16:56,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:16:56,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:16:56,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:16:56,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:16:56,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:16:56,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:16:56,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:16:57,148 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:16:57,148 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1569792094]
[2022-02-15 02:16:57,148 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1569792094] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:16:57,148 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:16:57,148 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38
[2022-02-15 02:16:57,148 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481215241]
[2022-02-15 02:16:57,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:16:57,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states
[2022-02-15 02:16:57,148 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:16:57,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants.
[2022-02-15 02:16:57,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1395, Unknown=0, NotChecked=0, Total=1560
[2022-02-15 02:16:57,149 INFO L87 Difference]: Start difference. First operand 607 states and 713 transitions. Second operand has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 37 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:17:01,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:17:01,493 INFO L93 Difference]: Finished difference Result 1213 states and 1407 transitions.
[2022-02-15 02:17:01,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states.
[2022-02-15 02:17:01,493 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 37 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 85
[2022-02-15 02:17:01,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:17:01,494 INFO L225 Difference]: With dead ends: 1213
[2022-02-15 02:17:01,494 INFO L226 Difference]: Without dead ends: 727
[2022-02-15 02:17:01,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 12 SyntacticMatches, 31 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1171 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=202, Invalid=1604, Unknown=0, NotChecked=0, Total=1806
[2022-02-15 02:17:01,495 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 76 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 3008 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 3029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 3008 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time
[2022-02-15 02:17:01,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 66 Invalid, 3029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 3008 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time]
[2022-02-15 02:17:01,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states.
[2022-02-15 02:17:03,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 607.
[2022-02-15 02:17:03,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 592 states have (on average 1.1756756756756757) internal successors, (696), 595 states have internal predecessors, (696), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:17:03,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 713 transitions.
[2022-02-15 02:17:03,755 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 713 transitions. Word has length 85
[2022-02-15 02:17:03,755 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:17:03,755 INFO L470 AbstractCegarLoop]: Abstraction has 607 states and 713 transitions.
[2022-02-15 02:17:03,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 37 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:17:03,756 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 713 transitions.
[2022-02-15 02:17:03,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86
[2022-02-15 02:17:03,756 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:17:03,756 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 11, 10, 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 02:17:03,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215
[2022-02-15 02:17:03,756 INFO L402 AbstractCegarLoop]: === Iteration 217 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:17:03,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:17:03,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1285271837, now seen corresponding path program 200 times
[2022-02-15 02:17:03,756 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:17:03,756 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1482079291]
[2022-02-15 02:17:03,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:17:03,791 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:17:03,833 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:17:03,834 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:17:03,878 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:17:03,921 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:17:03,921 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:17:03,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:17:03,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:17:04,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:17:04,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:17:04,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:17:04,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:17:04,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:17:05,437 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:17:05,438 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1482079291]
[2022-02-15 02:17:05,438 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1482079291] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:17:05,438 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:17:05,438 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43
[2022-02-15 02:17:05,438 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047036895]
[2022-02-15 02:17:05,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:17:05,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states
[2022-02-15 02:17:05,438 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:17:05,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants.
[2022-02-15 02:17:05,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1833, Unknown=0, NotChecked=0, Total=2070
[2022-02-15 02:17:05,439 INFO L87 Difference]: Start difference. First operand 607 states and 713 transitions. Second operand has 43 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 41 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:17:10,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:17:10,094 INFO L93 Difference]: Finished difference Result 1198 states and 1388 transitions.
[2022-02-15 02:17:10,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states.
[2022-02-15 02:17:10,095 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 41 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 85
[2022-02-15 02:17:10,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:17:10,095 INFO L225 Difference]: With dead ends: 1198
[2022-02-15 02:17:10,095 INFO L226 Difference]: Without dead ends: 712
[2022-02-15 02:17:10,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 6 SyntacticMatches, 30 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1382 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=299, Invalid=2151, Unknown=0, NotChecked=0, Total=2450
[2022-02-15 02:17:10,096 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 96 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 3281 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 3310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 3281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time
[2022-02-15 02:17:10,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 72 Invalid, 3310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 3281 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time]
[2022-02-15 02:17:10,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states.
[2022-02-15 02:17:12,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 607.
[2022-02-15 02:17:12,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 592 states have (on average 1.1756756756756757) internal successors, (696), 595 states have internal predecessors, (696), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:17:12,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 713 transitions.
[2022-02-15 02:17:12,382 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 713 transitions. Word has length 85
[2022-02-15 02:17:12,382 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:17:12,382 INFO L470 AbstractCegarLoop]: Abstraction has 607 states and 713 transitions.
[2022-02-15 02:17:12,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 41 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:17:12,383 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 713 transitions.
[2022-02-15 02:17:12,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86
[2022-02-15 02:17:12,383 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:17:12,383 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 11, 10, 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 02:17:12,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216
[2022-02-15 02:17:12,383 INFO L402 AbstractCegarLoop]: === Iteration 218 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:17:12,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:17:12,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1708918559, now seen corresponding path program 201 times
[2022-02-15 02:17:12,383 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:17:12,383 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [154180569]
[2022-02-15 02:17:12,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:17:12,430 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:17:12,471 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:17:12,471 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:17:12,516 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:17:12,557 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:17:12,557 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:17:12,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:17:12,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:17:12,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:17:12,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:17:12,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:17:12,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:17:12,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:17:13,669 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:17:13,669 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [154180569]
[2022-02-15 02:17:13,669 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [154180569] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:17:13,669 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:17:13,669 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40
[2022-02-15 02:17:13,669 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297817820]
[2022-02-15 02:17:13,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:17:13,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states
[2022-02-15 02:17:13,669 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:17:13,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants.
[2022-02-15 02:17:13,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1541, Unknown=0, NotChecked=0, Total=1722
[2022-02-15 02:17:13,670 INFO L87 Difference]: Start difference. First operand 607 states and 713 transitions. Second operand has 40 states, 40 states have (on average 1.975) internal successors, (79), 39 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:17:17,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:17:17,719 INFO L93 Difference]: Finished difference Result 1195 states and 1389 transitions.
[2022-02-15 02:17:17,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states.
[2022-02-15 02:17:17,720 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.975) internal successors, (79), 39 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 85
[2022-02-15 02:17:17,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:17:17,720 INFO L225 Difference]: With dead ends: 1195
[2022-02-15 02:17:17,720 INFO L226 Difference]: Without dead ends: 709
[2022-02-15 02:17:17,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 12 SyntacticMatches, 29 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1246 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=222, Invalid=1758, Unknown=0, NotChecked=0, Total=1980
[2022-02-15 02:17:17,721 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 75 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 2644 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 2667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 2644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time
[2022-02-15 02:17:17,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 65 Invalid, 2667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 2644 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time]
[2022-02-15 02:17:17,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states.
[2022-02-15 02:17:19,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 607.
[2022-02-15 02:17:19,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 592 states have (on average 1.1756756756756757) internal successors, (696), 595 states have internal predecessors, (696), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:17:19,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 713 transitions.
[2022-02-15 02:17:19,966 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 713 transitions. Word has length 85
[2022-02-15 02:17:19,966 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:17:19,966 INFO L470 AbstractCegarLoop]: Abstraction has 607 states and 713 transitions.
[2022-02-15 02:17:19,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.975) internal successors, (79), 39 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:17:19,966 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 713 transitions.
[2022-02-15 02:17:19,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86
[2022-02-15 02:17:19,966 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:17:19,966 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 12, 9, 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 02:17:19,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217
[2022-02-15 02:17:19,966 INFO L402 AbstractCegarLoop]: === Iteration 219 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:17:19,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:17:19,967 INFO L85 PathProgramCache]: Analyzing trace with hash 679559261, now seen corresponding path program 202 times
[2022-02-15 02:17:19,967 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:17:19,967 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [755907514]
[2022-02-15 02:17:19,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:17:20,000 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:17:20,042 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:17:20,042 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:17:20,087 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:17:20,128 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:17:20,128 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:17:20,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:17:20,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:17:20,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:17:20,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:17:20,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:17:20,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:17:20,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:17:21,267 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:17:21,267 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [755907514]
[2022-02-15 02:17:21,267 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [755907514] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:17:21,267 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:17:21,267 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41
[2022-02-15 02:17:21,267 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578143029]
[2022-02-15 02:17:21,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:17:21,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states
[2022-02-15 02:17:21,267 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:17:21,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants.
[2022-02-15 02:17:21,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1617, Unknown=0, NotChecked=0, Total=1806
[2022-02-15 02:17:21,268 INFO L87 Difference]: Start difference. First operand 607 states and 713 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:17:25,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:17:25,396 INFO L93 Difference]: Finished difference Result 1186 states and 1380 transitions.
[2022-02-15 02:17:25,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states.
[2022-02-15 02:17:25,397 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 85
[2022-02-15 02:17:25,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:17:25,397 INFO L225 Difference]: With dead ends: 1186
[2022-02-15 02:17:25,397 INFO L226 Difference]: Without dead ends: 700
[2022-02-15 02:17:25,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 12 SyntacticMatches, 28 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1270 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=232, Invalid=1838, Unknown=0, NotChecked=0, Total=2070
[2022-02-15 02:17:25,398 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 72 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 3580 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 3604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 3580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time
[2022-02-15 02:17:25,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 89 Invalid, 3604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 3580 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time]
[2022-02-15 02:17:25,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states.
[2022-02-15 02:17:27,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 607.
[2022-02-15 02:17:27,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 592 states have (on average 1.1756756756756757) internal successors, (696), 595 states have internal predecessors, (696), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:17:27,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 713 transitions.
[2022-02-15 02:17:27,700 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 713 transitions. Word has length 85
[2022-02-15 02:17:27,700 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:17:27,700 INFO L470 AbstractCegarLoop]: Abstraction has 607 states and 713 transitions.
[2022-02-15 02:17:27,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:17:27,700 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 713 transitions.
[2022-02-15 02:17:27,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86
[2022-02-15 02:17:27,700 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:17:27,700 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 13, 8, 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 02:17:27,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218
[2022-02-15 02:17:27,701 INFO L402 AbstractCegarLoop]: === Iteration 220 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:17:27,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:17:27,701 INFO L85 PathProgramCache]: Analyzing trace with hash -164446241, now seen corresponding path program 203 times
[2022-02-15 02:17:27,701 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:17:27,701 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1476234581]
[2022-02-15 02:17:27,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:17:27,747 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:17:27,778 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:17:27,779 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:17:27,811 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:17:27,842 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:17:27,842 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:17:27,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:17:27,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:17:27,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:17:27,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:17:27,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:17:27,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:17:27,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:17:28,983 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:17:28,984 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1476234581]
[2022-02-15 02:17:28,984 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1476234581] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:17:28,984 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:17:28,984 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42
[2022-02-15 02:17:28,984 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858193164]
[2022-02-15 02:17:28,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:17:28,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states
[2022-02-15 02:17:28,984 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:17:28,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants.
[2022-02-15 02:17:28,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1695, Unknown=0, NotChecked=0, Total=1892
[2022-02-15 02:17:28,985 INFO L87 Difference]: Start difference. First operand 607 states and 713 transitions. Second operand has 42 states, 42 states have (on average 1.880952380952381) internal successors, (79), 41 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:17:33,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:17:33,066 INFO L93 Difference]: Finished difference Result 1177 states and 1371 transitions.
[2022-02-15 02:17:33,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states.
[2022-02-15 02:17:33,067 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.880952380952381) internal successors, (79), 41 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 85
[2022-02-15 02:17:33,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:17:33,068 INFO L225 Difference]: With dead ends: 1177
[2022-02-15 02:17:33,068 INFO L226 Difference]: Without dead ends: 691
[2022-02-15 02:17:33,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 12 SyntacticMatches, 27 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1285 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=242, Invalid=1920, Unknown=0, NotChecked=0, Total=2162
[2022-02-15 02:17:33,068 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 89 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 3776 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 3801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 3776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time
[2022-02-15 02:17:33,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 64 Invalid, 3801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 3776 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time]
[2022-02-15 02:17:33,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states.
[2022-02-15 02:17:35,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 607.
[2022-02-15 02:17:35,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 592 states have (on average 1.1756756756756757) internal successors, (696), 595 states have internal predecessors, (696), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:17:35,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 713 transitions.
[2022-02-15 02:17:35,319 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 713 transitions. Word has length 85
[2022-02-15 02:17:35,319 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:17:35,319 INFO L470 AbstractCegarLoop]: Abstraction has 607 states and 713 transitions.
[2022-02-15 02:17:35,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.880952380952381) internal successors, (79), 41 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:17:35,319 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 713 transitions.
[2022-02-15 02:17:35,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86
[2022-02-15 02:17:35,320 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:17:35,320 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 14, 7, 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 02:17:35,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219
[2022-02-15 02:17:35,320 INFO L402 AbstractCegarLoop]: === Iteration 221 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:17:35,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:17:35,320 INFO L85 PathProgramCache]: Analyzing trace with hash 110313373, now seen corresponding path program 204 times
[2022-02-15 02:17:35,320 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:17:35,320 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1942519533]
[2022-02-15 02:17:35,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:17:35,354 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:17:35,386 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:17:35,386 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:17:35,431 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:17:35,474 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:17:35,474 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:17:35,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:17:35,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:17:35,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:17:35,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:17:35,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:17:35,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:17:35,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:17:36,642 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:17:36,642 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1942519533]
[2022-02-15 02:17:36,642 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1942519533] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:17:36,642 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:17:36,642 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43
[2022-02-15 02:17:36,642 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724998944]
[2022-02-15 02:17:36,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:17:36,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states
[2022-02-15 02:17:36,642 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:17:36,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants.
[2022-02-15 02:17:36,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1775, Unknown=0, NotChecked=0, Total=1980
[2022-02-15 02:17:36,643 INFO L87 Difference]: Start difference. First operand 607 states and 713 transitions. Second operand has 43 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 42 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:17:40,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:17:40,567 INFO L93 Difference]: Finished difference Result 1168 states and 1362 transitions.
[2022-02-15 02:17:40,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states.
[2022-02-15 02:17:40,567 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 42 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 85
[2022-02-15 02:17:40,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:17:40,568 INFO L225 Difference]: With dead ends: 1168
[2022-02-15 02:17:40,568 INFO L226 Difference]: Without dead ends: 682
[2022-02-15 02:17:40,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 12 SyntacticMatches, 26 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1291 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=252, Invalid=2004, Unknown=0, NotChecked=0, Total=2256
[2022-02-15 02:17:40,569 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 91 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 3618 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 3644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 3618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time
[2022-02-15 02:17:40,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 72 Invalid, 3644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 3618 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time]
[2022-02-15 02:17:40,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states.
[2022-02-15 02:17:42,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 607.
[2022-02-15 02:17:42,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 592 states have (on average 1.1756756756756757) internal successors, (696), 595 states have internal predecessors, (696), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:17:42,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 713 transitions.
[2022-02-15 02:17:42,839 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 713 transitions. Word has length 85
[2022-02-15 02:17:42,839 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:17:42,839 INFO L470 AbstractCegarLoop]: Abstraction has 607 states and 713 transitions.
[2022-02-15 02:17:42,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 42 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:17:42,839 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 713 transitions.
[2022-02-15 02:17:42,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86
[2022-02-15 02:17:42,839 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:17:42,839 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 15, 6, 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 02:17:42,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220
[2022-02-15 02:17:42,840 INFO L402 AbstractCegarLoop]: === Iteration 222 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:17:42,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:17:42,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1496516767, now seen corresponding path program 205 times
[2022-02-15 02:17:42,840 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:17:42,840 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1244349818]
[2022-02-15 02:17:42,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:17:42,887 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:17:42,930 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:17:42,930 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:17:42,963 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:17:42,995 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:17:42,995 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:17:42,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:17:42,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:17:43,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:17:43,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:17:43,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:17:43,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:17:43,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:17:44,190 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:17:44,190 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1244349818]
[2022-02-15 02:17:44,191 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1244349818] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:17:44,191 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:17:44,191 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44
[2022-02-15 02:17:44,191 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019830093]
[2022-02-15 02:17:44,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:17:44,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states
[2022-02-15 02:17:44,191 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:17:44,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants.
[2022-02-15 02:17:44,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1857, Unknown=0, NotChecked=0, Total=2070
[2022-02-15 02:17:44,191 INFO L87 Difference]: Start difference. First operand 607 states and 713 transitions. Second operand has 44 states, 44 states have (on average 1.7954545454545454) internal successors, (79), 43 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:17:47,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:17:47,934 INFO L93 Difference]: Finished difference Result 1159 states and 1353 transitions.
[2022-02-15 02:17:47,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states.
[2022-02-15 02:17:47,934 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.7954545454545454) internal successors, (79), 43 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 85
[2022-02-15 02:17:47,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:17:47,935 INFO L225 Difference]: With dead ends: 1159
[2022-02-15 02:17:47,935 INFO L226 Difference]: Without dead ends: 673
[2022-02-15 02:17:47,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 12 SyntacticMatches, 25 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1288 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=262, Invalid=2090, Unknown=0, NotChecked=0, Total=2352
[2022-02-15 02:17:47,936 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 83 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 3257 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 3284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 3257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time
[2022-02-15 02:17:47,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 74 Invalid, 3284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 3257 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time]
[2022-02-15 02:17:47,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states.
[2022-02-15 02:17:50,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 607.
[2022-02-15 02:17:50,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 592 states have (on average 1.1756756756756757) internal successors, (696), 595 states have internal predecessors, (696), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2022-02-15 02:17:50,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 713 transitions.
[2022-02-15 02:17:50,178 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 713 transitions. Word has length 85
[2022-02-15 02:17:50,178 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:17:50,179 INFO L470 AbstractCegarLoop]: Abstraction has 607 states and 713 transitions.
[2022-02-15 02:17:50,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.7954545454545454) internal successors, (79), 43 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:17:50,179 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 713 transitions.
[2022-02-15 02:17:50,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86
[2022-02-15 02:17:50,179 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:17:50,179 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 16, 5, 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 02:17:50,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221
[2022-02-15 02:17:50,179 INFO L402 AbstractCegarLoop]: === Iteration 223 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:17:50,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:17:50,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1558556381, now seen corresponding path program 206 times
[2022-02-15 02:17:50,179 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:17:50,179 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1211401406]
[2022-02-15 02:17:50,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:17:50,225 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:17:50,267 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:17:50,267 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:17:50,313 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:17:50,354 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:17:50,354 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2022-02-15 02:17:50,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:17:50,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:17:50,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:17:50,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:17:50,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-02-15 02:17:50,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:17:50,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:17:51,671 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:17:51,671 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1211401406]
[2022-02-15 02:17:51,671 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1211401406] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:17:51,671 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:17:51,671 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45
[2022-02-15 02:17:51,671 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051779687]
[2022-02-15 02:17:51,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:17:51,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states
[2022-02-15 02:17:51,672 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:17:51,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants.
[2022-02-15 02:17:51,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1941, Unknown=0, NotChecked=0, Total=2162
[2022-02-15 02:17:51,672 INFO L87 Difference]: Start difference. First operand 607 states and 713 transitions. Second operand has 45 states, 45 states have (on average 1.7555555555555555) internal successors, (79), 44 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2022-02-15 02:17:55,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:17:55,388 INFO L93 Difference]: Finished difference Result 1150 states and 1344 transitions.
[2022-02-15 02:17:55,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states.
[2022-02-15 02:17:55,389 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.7555555555555555) internal successors, (79), 44 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 85
[2022-02-15 02:17:55,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:17:55,389 INFO L225 Difference]: With dead ends: 1150
[2022-02-15 02:17:55,389 INFO L226 Difference]: Without dead ends: 664
[2022-02-15 02:17:55,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 12 SyntacticMatches, 24 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1276 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=272, Invalid=2178, Unknown=0, NotChecked=0, Total=2450
[2022-02-15 02:17:55,390 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 103 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 3543 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 3571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 3543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time
[2022-02-15 02:17:55,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 63 Invalid, 3571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 3543 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time]
[2022-02-15 02:17:55,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states.