/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/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/lcm2_valuebound5.c


--------------------------------------------------------------------------------


This is Ultimate 0.2.2-dev-34549b5
[2022-04-06 23:59:20,499 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2022-04-06 23:59:20,501 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2022-04-06 23:59:20,535 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2022-04-06 23:59:20,536 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2022-04-06 23:59:20,537 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2022-04-06 23:59:20,540 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2022-04-06 23:59:20,547 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2022-04-06 23:59:20,549 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2022-04-06 23:59:20,554 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
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[2022-04-06 23:59:20,555 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2022-04-06 23:59:20,555 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2022-04-06 23:59:20,556 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2022-04-06 23:59:20,557 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2022-04-06 23:59:20,557 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2022-04-06 23:59:20,558 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2022-04-06 23:59:20,558 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2022-04-06 23:59:20,560 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2022-04-06 23:59:20,561 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2022-04-06 23:59:20,562 INFO  L181        SettingsManager]: Resetting HornVerifier preferences to default values
[2022-04-06 23:59:20,562 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2022-04-06 23:59:20,563 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2022-04-06 23:59:20,564 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2022-04-06 23:59:20,565 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2022-04-06 23:59:20,567 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2022-04-06 23:59:20,567 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2022-04-06 23:59:20,567 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2022-04-06 23:59:20,568 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2022-04-06 23:59:20,568 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2022-04-06 23:59:20,569 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2022-04-06 23:59:20,569 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2022-04-06 23:59:20,569 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2022-04-06 23:59:20,570 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2022-04-06 23:59:20,570 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2022-04-06 23:59:20,571 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2022-04-06 23:59:20,571 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
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[2022-04-06 23:59:20,572 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2022-04-06 23:59:20,574 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2022-04-06 23:59:20,574 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf
[2022-04-06 23:59:20,581 INFO  L113        SettingsManager]: Loading preferences was successful
[2022-04-06 23:59:20,581 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2022-04-06 23:59:20,582 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2022-04-06 23:59:20,582 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2022-04-06 23:59:20,583 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2022-04-06 23:59:20,583 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2022-04-06 23:59:20,583 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2022-04-06 23:59:20,583 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2022-04-06 23:59:20,583 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2022-04-06 23:59:20,583 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2022-04-06 23:59:20,584 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2022-04-06 23:59:20,584 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2022-04-06 23:59:20,584 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2022-04-06 23:59:20,584 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2022-04-06 23:59:20,584 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2022-04-06 23:59:20,585 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-04-06 23:59:20,585 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2022-04-06 23:59:20,585 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=Craig_NestedInterpolation
[2022-04-06 23:59:20,585 INFO  L138        SettingsManager]:  * Trace refinement strategy=ACCELERATED_INTERPOLATION
[2022-04-06 23:59:20,585 INFO  L138        SettingsManager]:  * Trace refinement strategy used in Accelerated Interpolation=CAMEL
[2022-04-06 23:59:20,585 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2022-04-06 23:59:20,586 INFO  L138        SettingsManager]:  * Loop acceleration method that is used by accelerated interpolation=QVASR
[2022-04-06 23:59:20,586 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN;
[2022-04-06 23:59:20,751 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2022-04-06 23:59:20,772 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2022-04-06 23:59:20,773 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2022-04-06 23:59:20,774 INFO  L271        PluginConnector]: Initializing CDTParser...
[2022-04-06 23:59:20,777 INFO  L275        PluginConnector]: CDTParser initialized
[2022-04-06 23:59:20,778 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/lcm2_valuebound5.c
[2022-04-06 23:59:20,830 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/063f6be42/c30bcf8ed884423a9b6c61ef90495266/FLAG7133fcd0a
[2022-04-06 23:59:21,191 INFO  L306              CDTParser]: Found 1 translation units.
[2022-04-06 23:59:21,191 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/lcm2_valuebound5.c
[2022-04-06 23:59:21,197 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/063f6be42/c30bcf8ed884423a9b6c61ef90495266/FLAG7133fcd0a
[2022-04-06 23:59:21,598 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/063f6be42/c30bcf8ed884423a9b6c61ef90495266
[2022-04-06 23:59:21,599 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2022-04-06 23:59:21,600 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2022-04-06 23:59:21,603 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2022-04-06 23:59:21,604 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2022-04-06 23:59:21,606 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2022-04-06 23:59:21,607 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 11:59:21" (1/1) ...
[2022-04-06 23:59:21,607 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6dfe06fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:59:21, skipping insertion in model container
[2022-04-06 23:59:21,607 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 11:59:21" (1/1) ...
[2022-04-06 23:59:21,613 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2022-04-06 23:59:21,627 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2022-04-06 23:59:21,765 WARN  L230   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/lcm2_valuebound5.c[537,550]
[2022-04-06 23:59:21,779 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-04-06 23:59:21,784 INFO  L203         MainTranslator]: Completed pre-run
[2022-04-06 23:59:21,795 WARN  L230   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/lcm2_valuebound5.c[537,550]
[2022-04-06 23:59:21,801 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-04-06 23:59:21,812 INFO  L208         MainTranslator]: Completed translation
[2022-04-06 23:59:21,812 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:59:21 WrapperNode
[2022-04-06 23:59:21,812 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2022-04-06 23:59:21,813 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2022-04-06 23:59:21,813 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2022-04-06 23:59:21,813 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2022-04-06 23:59:21,822 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:59:21" (1/1) ...
[2022-04-06 23:59:21,822 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:59:21" (1/1) ...
[2022-04-06 23:59:21,827 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:59:21" (1/1) ...
[2022-04-06 23:59:21,827 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:59:21" (1/1) ...
[2022-04-06 23:59:21,831 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:59:21" (1/1) ...
[2022-04-06 23:59:21,834 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:59:21" (1/1) ...
[2022-04-06 23:59:21,840 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:59:21" (1/1) ...
[2022-04-06 23:59:21,841 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2022-04-06 23:59:21,842 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2022-04-06 23:59:21,842 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2022-04-06 23:59:21,842 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2022-04-06 23:59:21,845 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:59:21" (1/1) ...
[2022-04-06 23:59:21,855 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-04-06 23:59:21,862 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-04-06 23:59:21,870 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)
[2022-04-06 23:59:21,872 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
[2022-04-06 23:59:21,901 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2022-04-06 23:59:21,901 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2022-04-06 23:59:21,901 INFO  L138     BoogieDeclarations]: Found implementation of procedure reach_error
[2022-04-06 23:59:21,901 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2022-04-06 23:59:21,901 INFO  L138     BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2022-04-06 23:59:21,902 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2022-04-06 23:59:21,902 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2022-04-06 23:59:21,902 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_fail
[2022-04-06 23:59:21,902 INFO  L130     BoogieDeclarations]: Found specification of procedure reach_error
[2022-04-06 23:59:21,902 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2022-04-06 23:59:21,902 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint
[2022-04-06 23:59:21,903 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2022-04-06 23:59:21,903 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2022-04-06 23:59:21,903 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2022-04-06 23:59:21,904 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2022-04-06 23:59:21,906 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2022-04-06 23:59:21,906 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2022-04-06 23:59:21,906 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2022-04-06 23:59:21,906 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2022-04-06 23:59:21,906 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2022-04-06 23:59:21,953 INFO  L234             CfgBuilder]: Building ICFG
[2022-04-06 23:59:21,955 INFO  L260             CfgBuilder]: Building CFG for each procedure with an implementation
[2022-04-06 23:59:22,061 INFO  L275             CfgBuilder]: Performing block encoding
[2022-04-06 23:59:22,066 INFO  L294             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2022-04-06 23:59:22,066 INFO  L299             CfgBuilder]: Removed 1 assume(true) statements.
[2022-04-06 23:59:22,068 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 11:59:22 BoogieIcfgContainer
[2022-04-06 23:59:22,068 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2022-04-06 23:59:22,069 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2022-04-06 23:59:22,069 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2022-04-06 23:59:22,072 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2022-04-06 23:59:22,072 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 11:59:21" (1/3) ...
[2022-04-06 23:59:22,073 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10cc4a50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 11:59:22, skipping insertion in model container
[2022-04-06 23:59:22,073 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:59:21" (2/3) ...
[2022-04-06 23:59:22,073 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10cc4a50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 11:59:22, skipping insertion in model container
[2022-04-06 23:59:22,073 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 11:59:22" (3/3) ...
[2022-04-06 23:59:22,074 INFO  L111   eAbstractionObserver]: Analyzing ICFG lcm2_valuebound5.c
[2022-04-06 23:59:22,078 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2022-04-06 23:59:22,078 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2022-04-06 23:59:22,114 INFO  L339      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2022-04-06 23:59:22,130 INFO  L340      AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, 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
[2022-04-06 23:59:22,130 INFO  L341      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2022-04-06 23:59:22,147 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 34 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10)
[2022-04-06 23:59:22,157 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 44
[2022-04-06 23:59:22,157 INFO  L491         BasicCegarLoop]: Found error trace
[2022-04-06 23:59:22,158 INFO  L499         BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-04-06 23:59:22,158 INFO  L403      AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-04-06 23:59:22,163 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-04-06 23:59:22,163 INFO  L85        PathProgramCache]: Analyzing trace with hash 1830914611, now seen corresponding path program 1 times
[2022-04-06 23:59:22,177 INFO  L118   FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION
[2022-04-06 23:59:22,177 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [383193418]
[2022-04-06 23:59:22,186 INFO  L202   tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2022-04-06 23:59:22,186 INFO  L85        PathProgramCache]: Analyzing trace with hash 1830914611, now seen corresponding path program 2 times
[2022-04-06 23:59:22,187 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-04-06 23:59:22,188 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996855934]
[2022-04-06 23:59:22,188 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-04-06 23:59:22,189 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-04-06 23:59:22,264 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-04-06 23:59:22,331 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-04-06 23:59:22,335 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-04-06 23:59:22,353 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-04-06 23:59:22,355 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-04-06 23:59:22,363 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12
[2022-04-06 23:59:22,365 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-04-06 23:59:22,376 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17
[2022-04-06 23:59:22,377 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-04-06 23:59:22,385 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22
[2022-04-06 23:59:22,387 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-04-06 23:59:22,395 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27
[2022-04-06 23:59:22,396 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-04-06 23:59:22,404 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32
[2022-04-06 23:59:22,407 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-04-06 23:59:22,416 INFO  L134       CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked.
[2022-04-06 23:59:22,416 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-04-06 23:59:22,417 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996855934]
[2022-04-06 23:59:22,418 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996855934] provided 1 perfect and 0 imperfect interpolant sequences
[2022-04-06 23:59:22,418 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-04-06 23:59:22,418 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2022-04-06 23:59:22,422 INFO  L136   FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace
[2022-04-06 23:59:22,427 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [383193418]
[2022-04-06 23:59:22,427 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [383193418] provided 1 perfect and 0 imperfect interpolant sequences
[2022-04-06 23:59:22,427 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-04-06 23:59:22,428 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2022-04-06 23:59:22,428 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052009668]
[2022-04-06 23:59:22,429 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-04-06 23:59:22,433 INFO  L554      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-04-06 23:59:22,433 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION
[2022-04-06 23:59:22,458 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-04-06 23:59:22,459 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-04-06 23:59:22,461 INFO  L87              Difference]: Start difference. First operand  has 34 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand  has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7)
[2022-04-06 23:59:22,556 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-04-06 23:59:22,556 INFO  L93              Difference]: Finished difference Result 61 states and 90 transitions.
[2022-04-06 23:59:22,558 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-04-06 23:59:22,559 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43
[2022-04-06 23:59:22,559 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-04-06 23:59:22,571 INFO  L225             Difference]: With dead ends: 61
[2022-04-06 23:59:22,571 INFO  L226             Difference]: Without dead ends: 29
[2022-04-06 23:59:22,575 INFO  L912         BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-04-06 23:59:22,578 INFO  L913         BasicCegarLoop]: 33 mSDtfsCounter, 18 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-04-06 23:59:22,580 INFO  L914         BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 36 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-04-06 23:59:22,592 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 29 states.
[2022-04-06 23:59:22,617 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29.
[2022-04-06 23:59:22,618 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 29 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8)
[2022-04-06 23:59:22,619 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions.
[2022-04-06 23:59:22,620 INFO  L78                 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 43
[2022-04-06 23:59:22,621 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-04-06 23:59:22,621 INFO  L478      AbstractCegarLoop]: Abstraction has 29 states and 36 transitions.
[2022-04-06 23:59:22,621 INFO  L479      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7)
[2022-04-06 23:59:22,621 INFO  L276                IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions.
[2022-04-06 23:59:22,623 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 44
[2022-04-06 23:59:22,623 INFO  L491         BasicCegarLoop]: Found error trace
[2022-04-06 23:59:22,623 INFO  L499         BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-04-06 23:59:22,623 WARN  L460      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2022-04-06 23:59:22,623 INFO  L403      AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-04-06 23:59:22,624 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-04-06 23:59:22,624 INFO  L85        PathProgramCache]: Analyzing trace with hash 206107499, now seen corresponding path program 1 times
[2022-04-06 23:59:22,624 INFO  L118   FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION
[2022-04-06 23:59:22,624 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1551121479]
[2022-04-06 23:59:22,625 INFO  L202   tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2022-04-06 23:59:22,625 INFO  L85        PathProgramCache]: Analyzing trace with hash 206107499, now seen corresponding path program 2 times
[2022-04-06 23:59:22,625 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-04-06 23:59:22,625 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373489087]
[2022-04-06 23:59:22,626 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-04-06 23:59:22,626 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-04-06 23:59:22,648 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-04-06 23:59:22,649 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1351321119]
[2022-04-06 23:59:22,649 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-04-06 23:59:22,649 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-04-06 23:59:22,649 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-04-06 23:59:22,651 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-04-06 23:59:22,652 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2022-04-06 23:59:22,714 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s)
[2022-04-06 23:59:22,714 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-04-06 23:59:22,716 INFO  L263         TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 11 conjunts are in the unsatisfiable core
[2022-04-06 23:59:22,721 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-04-06 23:59:22,934 INFO  L134       CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked.
[2022-04-06 23:59:22,934 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-04-06 23:59:22,935 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-04-06 23:59:22,935 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373489087]
[2022-04-06 23:59:22,935 WARN  L310   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-04-06 23:59:22,935 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351321119]
[2022-04-06 23:59:22,936 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351321119] provided 1 perfect and 0 imperfect interpolant sequences
[2022-04-06 23:59:22,937 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-04-06 23:59:22,937 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2022-04-06 23:59:22,938 INFO  L136   FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace
[2022-04-06 23:59:22,938 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1551121479]
[2022-04-06 23:59:22,938 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1551121479] provided 1 perfect and 0 imperfect interpolant sequences
[2022-04-06 23:59:22,938 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-04-06 23:59:22,939 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2022-04-06 23:59:22,939 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859951103]
[2022-04-06 23:59:22,939 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-04-06 23:59:22,939 INFO  L554      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2022-04-06 23:59:22,940 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION
[2022-04-06 23:59:22,940 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2022-04-06 23:59:22,940 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2022-04-06 23:59:22,941 INFO  L87              Difference]: Start difference. First operand 29 states and 36 transitions. Second operand  has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7)
[2022-04-06 23:59:23,030 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-04-06 23:59:23,031 INFO  L93              Difference]: Finished difference Result 40 states and 49 transitions.
[2022-04-06 23:59:23,031 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2022-04-06 23:59:23,031 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 43
[2022-04-06 23:59:23,032 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-04-06 23:59:23,033 INFO  L225             Difference]: With dead ends: 40
[2022-04-06 23:59:23,033 INFO  L226             Difference]: Without dead ends: 37
[2022-04-06 23:59:23,034 INFO  L912         BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2022-04-06 23:59:23,035 INFO  L913         BasicCegarLoop]: 30 mSDtfsCounter, 7 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-04-06 23:59:23,036 INFO  L914         BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 105 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-04-06 23:59:23,036 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 37 states.
[2022-04-06 23:59:23,044 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36.
[2022-04-06 23:59:23,044 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 36 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9)
[2022-04-06 23:59:23,045 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions.
[2022-04-06 23:59:23,045 INFO  L78                 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 43
[2022-04-06 23:59:23,046 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-04-06 23:59:23,047 INFO  L478      AbstractCegarLoop]: Abstraction has 36 states and 43 transitions.
[2022-04-06 23:59:23,047 INFO  L479      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7)
[2022-04-06 23:59:23,047 INFO  L276                IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions.
[2022-04-06 23:59:23,048 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 52
[2022-04-06 23:59:23,048 INFO  L491         BasicCegarLoop]: Found error trace
[2022-04-06 23:59:23,048 INFO  L499         BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-04-06 23:59:23,069 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0
[2022-04-06 23:59:23,264 WARN  L460      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-04-06 23:59:23,264 INFO  L403      AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-04-06 23:59:23,265 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-04-06 23:59:23,265 INFO  L85        PathProgramCache]: Analyzing trace with hash 1555618915, now seen corresponding path program 1 times
[2022-04-06 23:59:23,265 INFO  L118   FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION
[2022-04-06 23:59:23,265 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2132594680]
[2022-04-06 23:59:23,266 INFO  L202   tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2022-04-06 23:59:23,266 INFO  L85        PathProgramCache]: Analyzing trace with hash 1555618915, now seen corresponding path program 2 times
[2022-04-06 23:59:23,267 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-04-06 23:59:23,267 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680641274]
[2022-04-06 23:59:23,267 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-04-06 23:59:23,267 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-04-06 23:59:23,291 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-04-06 23:59:23,291 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [426732073]
[2022-04-06 23:59:23,291 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-04-06 23:59:23,292 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-04-06 23:59:23,292 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-04-06 23:59:23,293 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-04-06 23:59:23,310 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process