/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/egcd2-ll_unwindbound5.c
--------------------------------------------------------------------------------
This is Ultimate 0.2.2-dev-7968f31
[2022-03-18 02:37:27,604 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2022-03-18 02:37:27,605 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
[2022-03-18 02:37:27,630 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2022-03-18 02:37:27,630 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2022-03-18 02:37:27,631 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2022-03-18 02:37:27,635 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2022-03-18 02:37:27,640 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values
[2022-03-18 02:37:27,641 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values
[2022-03-18 02:37:27,645 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values
[2022-03-18 02:37:27,646 INFO L181 SettingsManager]: Resetting Sifa preferences to default values
[2022-03-18 02:37:27,647 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2022-03-18 02:37:27,647 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values
[2022-03-18 02:37:27,649 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values
[2022-03-18 02:37:27,649 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2022-03-18 02:37:27,650 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values
[2022-03-18 02:37:27,651 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2022-03-18 02:37:27,651 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2022-03-18 02:37:27,654 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2022-03-18 02:37:27,659 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values
[2022-03-18 02:37:27,661 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values
[2022-03-18 02:37:27,662 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2022-03-18 02:37:27,662 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values
[2022-03-18 02:37:27,663 INFO L181 SettingsManager]: Resetting Referee preferences to default values
[2022-03-18 02:37:27,664 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values
[2022-03-18 02:37:27,669 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2022-03-18 02:37:27,669 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2022-03-18 02:37:27,669 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values
[2022-03-18 02:37:27,670 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values
[2022-03-18 02:37:27,670 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values
[2022-03-18 02:37:27,671 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring...
[2022-03-18 02:37:27,671 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values
[2022-03-18 02:37:27,672 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2022-03-18 02:37:27,673 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values
[2022-03-18 02:37:27,673 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values
[2022-03-18 02:37:27,674 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2022-03-18 02:37:27,674 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values
[2022-03-18 02:37:27,674 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
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[2022-03-18 02:37:27,675 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values
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[2022-03-18 02:37:27,677 INFO L188 SettingsManager]: Finished resetting all preferences to default values...
[2022-03-18 02:37:27,677 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf
[2022-03-18 02:37:27,687 INFO L113 SettingsManager]: Loading preferences was successful
[2022-03-18 02:37:27,688 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2022-03-18 02:37:27,690 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2022-03-18 02:37:27,690 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2022-03-18 02:37:27,690 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2022-03-18 02:37:27,690 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2022-03-18 02:37:27,690 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2022-03-18 02:37:27,690 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2022-03-18 02:37:27,690 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2022-03-18 02:37:27,691 INFO L138 SettingsManager]: * Use constant arrays=true
[2022-03-18 02:37:27,691 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2022-03-18 02:37:27,691 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2022-03-18 02:37:27,691 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements
[2022-03-18 02:37:27,691 INFO L138 SettingsManager]: * To the following directory=./dump/
[2022-03-18 02:37:27,691 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2022-03-18 02:37:27,691 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-03-18 02:37:27,692 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2022-03-18 02:37:27,692 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation
[2022-03-18 02:37:27,692 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION
[2022-03-18 02:37:27,692 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL
[2022-03-18 02:37:27,692 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2022-03-18 02:37:27,692 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR
[2022-03-18 02:37:27,692 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN;
[2022-03-18 02:37:27,880 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp
[2022-03-18 02:37:27,899 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2022-03-18 02:37:27,902 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2022-03-18 02:37:27,903 INFO L271 PluginConnector]: Initializing CDTParser...
[2022-03-18 02:37:27,904 INFO L275 PluginConnector]: CDTParser initialized
[2022-03-18 02:37:27,905 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound5.c
[2022-03-18 02:37:27,955 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/856dc7014/b46efae81a1c4f18ad803f485559dffd/FLAGa5724f41a
[2022-03-18 02:37:28,253 INFO L306 CDTParser]: Found 1 translation units.
[2022-03-18 02:37:28,254 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound5.c
[2022-03-18 02:37:28,259 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/856dc7014/b46efae81a1c4f18ad803f485559dffd/FLAGa5724f41a
[2022-03-18 02:37:28,690 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/856dc7014/b46efae81a1c4f18ad803f485559dffd
[2022-03-18 02:37:28,692 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2022-03-18 02:37:28,693 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements.
[2022-03-18 02:37:28,695 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2022-03-18 02:37:28,695 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2022-03-18 02:37:28,698 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2022-03-18 02:37:28,699 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 02:37:28" (1/1) ...
[2022-03-18 02:37:28,699 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a3bccc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:37:28, skipping insertion in model container
[2022-03-18 02:37:28,700 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 02:37:28" (1/1) ...
[2022-03-18 02:37:28,704 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2022-03-18 02:37:28,717 INFO L178 MainTranslator]: Built tables and reachable declarations
[2022-03-18 02:37:28,838 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/egcd2-ll_unwindbound5.c[490,503]
[2022-03-18 02:37:28,852 INFO L210 PostProcessor]: Analyzing one entry point: main
[2022-03-18 02:37:28,857 INFO L203 MainTranslator]: Completed pre-run
[2022-03-18 02:37:28,864 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/egcd2-ll_unwindbound5.c[490,503]
[2022-03-18 02:37:28,870 INFO L210 PostProcessor]: Analyzing one entry point: main
[2022-03-18 02:37:28,879 INFO L208 MainTranslator]: Completed translation
[2022-03-18 02:37:28,879 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:37:28 WrapperNode
[2022-03-18 02:37:28,880 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2022-03-18 02:37:28,880 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2022-03-18 02:37:28,880 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2022-03-18 02:37:28,880 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2022-03-18 02:37:28,887 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:37:28" (1/1) ...
[2022-03-18 02:37:28,888 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:37:28" (1/1) ...
[2022-03-18 02:37:28,892 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:37:28" (1/1) ...
[2022-03-18 02:37:28,892 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:37:28" (1/1) ...
[2022-03-18 02:37:28,896 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:37:28" (1/1) ...
[2022-03-18 02:37:28,899 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:37:28" (1/1) ...
[2022-03-18 02:37:28,900 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:37:28" (1/1) ...
[2022-03-18 02:37:28,901 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2022-03-18 02:37:28,902 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2022-03-18 02:37:28,902 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2022-03-18 02:37:28,902 INFO L275 PluginConnector]: RCFGBuilder initialized
[2022-03-18 02:37:28,903 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:37:28" (1/1) ...
[2022-03-18 02:37:28,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-03-18 02:37:28,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-03-18 02:37:28,927 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)
[2022-03-18 02:37:28,938 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
[2022-03-18 02:37:28,971 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2022-03-18 02:37:28,971 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2022-03-18 02:37:28,971 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error
[2022-03-18 02:37:28,971 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2022-03-18 02:37:28,972 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2022-03-18 02:37:28,972 INFO L138 BoogieDeclarations]: Found implementation of procedure main
[2022-03-18 02:37:28,972 INFO L130 BoogieDeclarations]: Found specification of procedure abort
[2022-03-18 02:37:28,972 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail
[2022-03-18 02:37:28,972 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error
[2022-03-18 02:37:28,973 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2022-03-18 02:37:28,973 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2022-03-18 02:37:28,973 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2022-03-18 02:37:28,973 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2022-03-18 02:37:28,974 INFO L130 BoogieDeclarations]: Found specification of procedure main
[2022-03-18 02:37:28,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2022-03-18 02:37:28,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int
[2022-03-18 02:37:28,976 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2022-03-18 02:37:28,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~int
[2022-03-18 02:37:28,976 INFO L130 BoogieDeclarations]: Found specification of procedure read~int
[2022-03-18 02:37:28,976 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2022-03-18 02:37:29,025 INFO L234 CfgBuilder]: Building ICFG
[2022-03-18 02:37:29,026 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation
[2022-03-18 02:37:29,132 INFO L275 CfgBuilder]: Performing block encoding
[2022-03-18 02:37:29,137 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2022-03-18 02:37:29,137 INFO L299 CfgBuilder]: Removed 2 assume(true) statements.
[2022-03-18 02:37:29,138 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 02:37:29 BoogieIcfgContainer
[2022-03-18 02:37:29,138 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2022-03-18 02:37:29,139 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2022-03-18 02:37:29,139 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2022-03-18 02:37:29,153 INFO L275 PluginConnector]: TraceAbstraction initialized
[2022-03-18 02:37:29,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 02:37:28" (1/3) ...
[2022-03-18 02:37:29,154 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@279e1f5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 02:37:29, skipping insertion in model container
[2022-03-18 02:37:29,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:37:28" (2/3) ...
[2022-03-18 02:37:29,154 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@279e1f5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 02:37:29, skipping insertion in model container
[2022-03-18 02:37:29,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 02:37:29" (3/3) ...
[2022-03-18 02:37:29,155 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound5.c
[2022-03-18 02:37:29,158 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2022-03-18 02:37:29,159 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2022-03-18 02:37:29,188 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2022-03-18 02:37:29,195 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
[2022-03-18 02:37:29,195 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2022-03-18 02:37:29,207 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 23 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12)
[2022-03-18 02:37:29,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33
[2022-03-18 02:37:29,223 INFO L492 BasicCegarLoop]: Found error trace
[2022-03-18 02:37:29,223 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-03-18 02:37:29,224 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-03-18 02:37:29,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-03-18 02:37:29,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1950618521, now seen corresponding path program 1 times
[2022-03-18 02:37:29,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION
[2022-03-18 02:37:29,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [44698002]
[2022-03-18 02:37:29,248 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2022-03-18 02:37:29,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1950618521, now seen corresponding path program 2 times
[2022-03-18 02:37:29,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-03-18 02:37:29,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715506828]
[2022-03-18 02:37:29,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-03-18 02:37:29,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-03-18 02:37:29,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-03-18 02:37:29,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-03-18 02:37:29,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-03-18 02:37:29,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-03-18 02:37:29,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-03-18 02:37:29,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11
[2022-03-18 02:37:29,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-03-18 02:37:29,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17
[2022-03-18 02:37:29,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-03-18 02:37:29,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22
[2022-03-18 02:37:29,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-03-18 02:37:29,442 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked.
[2022-03-18 02:37:29,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-03-18 02:37:29,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715506828]
[2022-03-18 02:37:29,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715506828] provided 1 perfect and 0 imperfect interpolant sequences
[2022-03-18 02:37:29,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-03-18 02:37:29,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2022-03-18 02:37:29,445 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace
[2022-03-18 02:37:29,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [44698002]
[2022-03-18 02:37:29,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [44698002] provided 1 perfect and 0 imperfect interpolant sequences
[2022-03-18 02:37:29,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-03-18 02:37:29,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2022-03-18 02:37:29,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213773686]
[2022-03-18 02:37:29,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-03-18 02:37:29,449 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-03-18 02:37:29,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION
[2022-03-18 02:37:29,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-03-18 02:37:29,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-03-18 02:37:29,469 INFO L87 Difference]: Start difference. First operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 23 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5)
[2022-03-18 02:37:29,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-03-18 02:37:29,549 INFO L93 Difference]: Finished difference Result 72 states and 112 transitions.
[2022-03-18 02:37:29,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2022-03-18 02:37:29,551 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32
[2022-03-18 02:37:29,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-03-18 02:37:29,556 INFO L225 Difference]: With dead ends: 72
[2022-03-18 02:37:29,556 INFO L226 Difference]: Without dead ends: 35
[2022-03-18 02:37:29,559 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-03-18 02:37:29,561 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-03-18 02:37:29,562 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 49 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-03-18 02:37:29,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states.
[2022-03-18 02:37:29,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34.
[2022-03-18 02:37:29,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 20 states have internal predecessors, (23), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10)
[2022-03-18 02:37:29,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions.
[2022-03-18 02:37:29,591 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 32
[2022-03-18 02:37:29,591 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-03-18 02:37:29,591 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions.
[2022-03-18 02:37:29,591 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5)
[2022-03-18 02:37:29,591 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions.
[2022-03-18 02:37:29,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34
[2022-03-18 02:37:29,593 INFO L492 BasicCegarLoop]: Found error trace
[2022-03-18 02:37:29,593 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-03-18 02:37:29,593 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2022-03-18 02:37:29,593 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-03-18 02:37:29,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-03-18 02:37:29,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1734391985, now seen corresponding path program 1 times
[2022-03-18 02:37:29,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION
[2022-03-18 02:37:29,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [801883364]
[2022-03-18 02:37:29,595 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2022-03-18 02:37:29,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1734391985, now seen corresponding path program 2 times
[2022-03-18 02:37:29,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-03-18 02:37:29,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212666558]
[2022-03-18 02:37:29,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-03-18 02:37:29,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-03-18 02:37:29,608 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-03-18 02:37:29,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1026268230]
[2022-03-18 02:37:29,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-03-18 02:37:29,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-03-18 02:37:29,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-03-18 02:37:29,610 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)
[2022-03-18 02:37:29,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2022-03-18 02:37:29,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s)
[2022-03-18 02:37:29,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2022-03-18 02:37:29,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core
[2022-03-18 02:37:29,656 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-03-18 02:37:29,750 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked.
[2022-03-18 02:37:29,750 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-03-18 02:37:29,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-03-18 02:37:29,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212666558]
[2022-03-18 02:37:29,751 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-03-18 02:37:29,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026268230]
[2022-03-18 02:37:29,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026268230] provided 1 perfect and 0 imperfect interpolant sequences
[2022-03-18 02:37:29,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-03-18 02:37:29,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2022-03-18 02:37:29,752 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace
[2022-03-18 02:37:29,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [801883364]
[2022-03-18 02:37:29,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [801883364] provided 1 perfect and 0 imperfect interpolant sequences
[2022-03-18 02:37:29,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-03-18 02:37:29,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2022-03-18 02:37:29,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988201397]
[2022-03-18 02:37:29,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-03-18 02:37:29,753 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2022-03-18 02:37:29,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION
[2022-03-18 02:37:29,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2022-03-18 02:37:29,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2022-03-18 02:37:29,754 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5)
[2022-03-18 02:37:29,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-03-18 02:37:29,769 INFO L93 Difference]: Finished difference Result 44 states and 56 transitions.
[2022-03-18 02:37:29,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states.
[2022-03-18 02:37:29,772 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33
[2022-03-18 02:37:29,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-03-18 02:37:29,773 INFO L225 Difference]: With dead ends: 44
[2022-03-18 02:37:29,773 INFO L226 Difference]: Without dead ends: 36
[2022-03-18 02:37:29,773 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2022-03-18 02:37:29,774 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-03-18 02:37:29,774 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 110 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-03-18 02:37:29,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states.
[2022-03-18 02:37:29,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36.
[2022-03-18 02:37:29,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 20 states have (on average 1.25) internal successors, (25), 21 states have internal predecessors, (25), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10)
[2022-03-18 02:37:29,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions.
[2022-03-18 02:37:29,782 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 33
[2022-03-18 02:37:29,783 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-03-18 02:37:29,783 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions.
[2022-03-18 02:37:29,783 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5)
[2022-03-18 02:37:29,783 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions.
[2022-03-18 02:37:29,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35
[2022-03-18 02:37:29,784 INFO L492 BasicCegarLoop]: Found error trace
[2022-03-18 02:37:29,784 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-03-18 02:37:29,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2022-03-18 02:37:29,987 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
[2022-03-18 02:37:29,988 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-03-18 02:37:29,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-03-18 02:37:29,988 INFO L85 PathProgramCache]: Analyzing trace with hash 2066454233, now seen corresponding path program 1 times
[2022-03-18 02:37:29,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION
[2022-03-18 02:37:29,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [845558092]
[2022-03-18 02:37:29,989 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2022-03-18 02:37:29,989 INFO L85 PathProgramCache]: Analyzing trace with hash 2066454233, now seen corresponding path program 2 times
[2022-03-18 02:37:29,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-03-18 02:37:29,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596914739]
[2022-03-18 02:37:29,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-03-18 02:37:29,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-03-18 02:37:30,000 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-03-18 02:37:30,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1422817942]
[2022-03-18 02:37:30,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-03-18 02:37:30,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-03-18 02:37:30,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-03-18 02:37:30,002 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)
[2022-03-18 02:37:30,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2022-03-18 02:37:30,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2022-03-18 02:37:30,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2022-03-18 02:37:30,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjunts are in the unsatisfiable core
[2022-03-18 02:37:30,057 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-03-18 02:37:30,168 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked.
[2022-03-18 02:37:30,169 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2022-03-18 02:37:30,283 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked.
[2022-03-18 02:37:30,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-03-18 02:37:30,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596914739]
[2022-03-18 02:37:30,284 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-03-18 02:37:30,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422817942]
[2022-03-18 02:37:30,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422817942] provided 0 perfect and 2 imperfect interpolant sequences
[2022-03-18 02:37:30,284 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2022-03-18 02:37:30,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7
[2022-03-18 02:37:30,285 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace
[2022-03-18 02:37:30,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [845558092]
[2022-03-18 02:37:30,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [845558092] provided 1 perfect and 0 imperfect interpolant sequences
[2022-03-18 02:37:30,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-03-18 02:37:30,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2022-03-18 02:37:30,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115875641]
[2022-03-18 02:37:30,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-03-18 02:37:30,286 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2022-03-18 02:37:30,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION
[2022-03-18 02:37:30,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2022-03-18 02:37:30,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42
[2022-03-18 02:37:30,287 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5)
[2022-03-18 02:37:30,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-03-18 02:37:30,378 INFO L93 Difference]: Finished difference Result 53 states and 71 transitions.
[2022-03-18 02:37:30,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states.
[2022-03-18 02:37:30,378 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34
[2022-03-18 02:37:30,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-03-18 02:37:30,382 INFO L225 Difference]: With dead ends: 53
[2022-03-18 02:37:30,383 INFO L226 Difference]: Without dead ends: 45
[2022-03-18 02:37:30,384 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72
[2022-03-18 02:37:30,389 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 28 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-03-18 02:37:30,390 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 160 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-03-18 02:37:30,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states.
[2022-03-18 02:37:30,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37.
[2022-03-18 02:37:30,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10)
[2022-03-18 02:37:30,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions.
[2022-03-18 02:37:30,400 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 34
[2022-03-18 02:37:30,400 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-03-18 02:37:30,402 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions.
[2022-03-18 02:37:30,403 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5)
[2022-03-18 02:37:30,403 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions.
[2022-03-18 02:37:30,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37
[2022-03-18 02:37:30,403 INFO L492 BasicCegarLoop]: Found error trace
[2022-03-18 02:37:30,404 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-03-18 02:37:30,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2022-03-18 02:37:30,604 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2
[2022-03-18 02:37:30,604 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-03-18 02:37:30,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-03-18 02:37:30,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1678606280, now seen corresponding path program 1 times
[2022-03-18 02:37:30,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION
[2022-03-18 02:37:30,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [970517875]
[2022-03-18 02:37:30,606 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2022-03-18 02:37:30,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1678606280, now seen corresponding path program 2 times
[2022-03-18 02:37:30,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-03-18 02:37:30,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999946506]
[2022-03-18 02:37:30,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-03-18 02:37:30,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-03-18 02:37:30,615 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-03-18 02:37:30,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1802929562]
[2022-03-18 02:37:30,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-03-18 02:37:30,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-03-18 02:37:30,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-03-18 02:37:30,627 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-03-18 02:37:30,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2022-03-18 02:37:30,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s)
[2022-03-18 02:37:30,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2022-03-18 02:37:30,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core
[2022-03-18 02:37:30,670 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-03-18 02:37:30,744 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked.
[2022-03-18 02:37:30,744 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-03-18 02:37:30,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-03-18 02:37:30,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999946506]
[2022-03-18 02:37:30,744 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-03-18 02:37:30,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802929562]
[2022-03-18 02:37:30,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802929562] provided 1 perfect and 0 imperfect interpolant sequences
[2022-03-18 02:37:30,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-03-18 02:37:30,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2022-03-18 02:37:30,745 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace
[2022-03-18 02:37:30,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [970517875]
[2022-03-18 02:37:30,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [970517875] provided 1 perfect and 0 imperfect interpolant sequences
[2022-03-18 02:37:30,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-03-18 02:37:30,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2022-03-18 02:37:30,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701030092]
[2022-03-18 02:37:30,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-03-18 02:37:30,746 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2022-03-18 02:37:30,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION
[2022-03-18 02:37:30,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2022-03-18 02:37:30,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2022-03-18 02:37:30,747 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5)
[2022-03-18 02:37:30,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-03-18 02:37:30,784 INFO L93 Difference]: Finished difference Result 51 states and 67 transitions.
[2022-03-18 02:37:30,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states.
[2022-03-18 02:37:30,784 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), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 36
[2022-03-18 02:37:30,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-03-18 02:37:30,786 INFO L225 Difference]: With dead ends: 51
[2022-03-18 02:37:30,786 INFO L226 Difference]: Without dead ends: 49
[2022-03-18 02:37:30,786 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2022-03-18 02:37:30,787 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 7 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-03-18 02:37:30,787 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 159 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-03-18 02:37:30,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states.
[2022-03-18 02:37:30,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44.
[2022-03-18 02:37:30,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 28 states have internal predecessors, (32), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11)
[2022-03-18 02:37:30,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions.
[2022-03-18 02:37:30,802 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 36
[2022-03-18 02:37:30,802 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-03-18 02:37:30,803 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions.
[2022-03-18 02:37:30,803 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5)
[2022-03-18 02:37:30,803 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions.
[2022-03-18 02:37:30,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40
[2022-03-18 02:37:30,804 INFO L492 BasicCegarLoop]: Found error trace
[2022-03-18 02:37:30,804 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-03-18 02:37:30,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0
[2022-03-18 02:37:31,020 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-03-18 02:37:31,020 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-03-18 02:37:31,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-03-18 02:37:31,021 INFO L85 PathProgramCache]: Analyzing trace with hash -2124209112, now seen corresponding path program 1 times
[2022-03-18 02:37:31,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION
[2022-03-18 02:37:31,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1676291500]
[2022-03-18 02:37:31,022 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2022-03-18 02:37:31,022 INFO L85 PathProgramCache]: Analyzing trace with hash -2124209112, now seen corresponding path program 2 times
[2022-03-18 02:37:31,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-03-18 02:37:31,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927488175]
[2022-03-18 02:37:31,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-03-18 02:37:31,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-03-18 02:37:31,034 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-03-18 02:37:31,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1040305602]
[2022-03-18 02:37:31,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-03-18 02:37:31,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-03-18 02:37:31,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-03-18 02:37:31,038 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-03-18 02:37:31,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2022-03-18 02:37:31,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2022-03-18 02:37:31,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2022-03-18 02:37:31,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 7 conjunts are in the unsatisfiable core
[2022-03-18 02:37:31,090 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-03-18 02:37:31,170 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked.
[2022-03-18 02:37:31,171 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-03-18 02:37:31,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-03-18 02:37:31,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927488175]
[2022-03-18 02:37:31,171 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-03-18 02:37:31,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040305602]
[2022-03-18 02:37:31,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040305602] provided 1 perfect and 0 imperfect interpolant sequences
[2022-03-18 02:37:31,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-03-18 02:37:31,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2022-03-18 02:37:31,172 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace
[2022-03-18 02:37:31,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1676291500]
[2022-03-18 02:37:31,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1676291500] provided 1 perfect and 0 imperfect interpolant sequences
[2022-03-18 02:37:31,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-03-18 02:37:31,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2022-03-18 02:37:31,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487731320]
[2022-03-18 02:37:31,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-03-18 02:37:31,172 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2022-03-18 02:37:31,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION
[2022-03-18 02:37:31,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2022-03-18 02:37:31,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2022-03-18 02:37:31,173 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5)
[2022-03-18 02:37:31,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-03-18 02:37:31,209 INFO L93 Difference]: Finished difference Result 72 states and 94 transitions.
[2022-03-18 02:37:31,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states.
[2022-03-18 02:37:31,209 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39
[2022-03-18 02:37:31,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-03-18 02:37:31,213 INFO L225 Difference]: With dead ends: 72
[2022-03-18 02:37:31,213 INFO L226 Difference]: Without dead ends: 46
[2022-03-18 02:37:31,214 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2022-03-18 02:37:31,216 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-03-18 02:37:31,216 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 133 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-03-18 02:37:31,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states.
[2022-03-18 02:37:31,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46.
[2022-03-18 02:37:31,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 30 states have internal predecessors, (34), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11)
[2022-03-18 02:37:31,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions.
[2022-03-18 02:37:31,229 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 58 transitions. Word has length 39
[2022-03-18 02:37:31,230 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-03-18 02:37:31,230 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 58 transitions.
[2022-03-18 02:37:31,230 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5)
[2022-03-18 02:37:31,230 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 58 transitions.
[2022-03-18 02:37:31,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42
[2022-03-18 02:37:31,232 INFO L492 BasicCegarLoop]: Found error trace
[2022-03-18 02:37:31,232 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 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]
[2022-03-18 02:37:31,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0
[2022-03-18 02:37:31,443 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-03-18 02:37:31,443 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-03-18 02:37:31,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-03-18 02:37:31,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1052701339, now seen corresponding path program 1 times
[2022-03-18 02:37:31,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION
[2022-03-18 02:37:31,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1195213555]
[2022-03-18 02:37:31,444 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2022-03-18 02:37:31,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1052701339, now seen corresponding path program 2 times
[2022-03-18 02:37:31,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-03-18 02:37:31,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411662084]
[2022-03-18 02:37:31,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-03-18 02:37:31,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-03-18 02:37:31,469 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-03-18 02:37:31,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1432485241]
[2022-03-18 02:37:31,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-03-18 02:37:31,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-03-18 02:37:31,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-03-18 02:37:31,471 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-03-18 02:37:31,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process
[2022-03-18 02:37:31,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2022-03-18 02:37:31,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2022-03-18 02:37:31,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core
[2022-03-18 02:37:31,514 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-03-18 02:37:31,679 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked.
[2022-03-18 02:37:31,679 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2022-03-18 02:37:31,770 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked.
[2022-03-18 02:37:31,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-03-18 02:37:31,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411662084]
[2022-03-18 02:37:31,771 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-03-18 02:37:31,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432485241]
[2022-03-18 02:37:31,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432485241] provided 1 perfect and 1 imperfect interpolant sequences
[2022-03-18 02:37:31,771 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2022-03-18 02:37:31,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9
[2022-03-18 02:37:31,771 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace
[2022-03-18 02:37:31,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1195213555]
[2022-03-18 02:37:31,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1195213555] provided 1 perfect and 0 imperfect interpolant sequences
[2022-03-18 02:37:31,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-03-18 02:37:31,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2022-03-18 02:37:31,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192841222]
[2022-03-18 02:37:31,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-03-18 02:37:31,772 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2022-03-18 02:37:31,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION
[2022-03-18 02:37:31,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2022-03-18 02:37:31,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72
[2022-03-18 02:37:31,773 INFO L87 Difference]: Start difference. First operand 46 states and 58 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6)
[2022-03-18 02:37:31,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-03-18 02:37:31,801 INFO L93 Difference]: Finished difference Result 61 states and 79 transitions.
[2022-03-18 02:37:31,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states.
[2022-03-18 02:37:31,802 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 41
[2022-03-18 02:37:31,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-03-18 02:37:31,802 INFO L225 Difference]: With dead ends: 61
[2022-03-18 02:37:31,802 INFO L226 Difference]: Without dead ends: 59
[2022-03-18 02:37:31,803 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2022-03-18 02:37:31,803 INFO L912 BasicCegarLoop]: 47 mSDtfsCounter, 8 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-03-18 02:37:31,803 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 169 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-03-18 02:37:31,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states.
[2022-03-18 02:37:31,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58.
[2022-03-18 02:37:31,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 37 states have internal predecessors, (42), 18 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16)
[2022-03-18 02:37:31,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 76 transitions.
[2022-03-18 02:37:31,811 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 76 transitions. Word has length 41
[2022-03-18 02:37:31,811 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-03-18 02:37:31,811 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 76 transitions.
[2022-03-18 02:37:31,811 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6)
[2022-03-18 02:37:31,812 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 76 transitions.
[2022-03-18 02:37:31,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47
[2022-03-18 02:37:31,812 INFO L492 BasicCegarLoop]: Found error trace
[2022-03-18 02:37:31,812 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-03-18 02:37:31,831 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0
[2022-03-18 02:37:32,029 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-03-18 02:37:32,029 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-03-18 02:37:32,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-03-18 02:37:32,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1531994984, now seen corresponding path program 1 times
[2022-03-18 02:37:32,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION
[2022-03-18 02:37:32,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [601413243]
[2022-03-18 02:37:32,030 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2022-03-18 02:37:32,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1531994984, now seen corresponding path program 2 times
[2022-03-18 02:37:32,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-03-18 02:37:32,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316993822]
[2022-03-18 02:37:32,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-03-18 02:37:32,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-03-18 02:37:32,038 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-03-18 02:37:32,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1963992610]
[2022-03-18 02:37:32,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-03-18 02:37:32,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-03-18 02:37:32,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-03-18 02:37:32,039 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-03-18 02:37:32,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process
[2022-03-18 02:37:32,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2022-03-18 02:37:32,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2022-03-18 02:37:32,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 14 conjunts are in the unsatisfiable core
[2022-03-18 02:37:32,078 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-03-18 02:37:32,227 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked.
[2022-03-18 02:37:32,228 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2022-03-18 02:37:32,316 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked.
[2022-03-18 02:37:32,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-03-18 02:37:32,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316993822]
[2022-03-18 02:37:32,317 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-03-18 02:37:32,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963992610]
[2022-03-18 02:37:32,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963992610] provided 1 perfect and 1 imperfect interpolant sequences
[2022-03-18 02:37:32,317 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2022-03-18 02:37:32,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9
[2022-03-18 02:37:32,317 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace
[2022-03-18 02:37:32,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [601413243]
[2022-03-18 02:37:32,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [601413243] provided 1 perfect and 0 imperfect interpolant sequences
[2022-03-18 02:37:32,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-03-18 02:37:32,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2022-03-18 02:37:32,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377176753]
[2022-03-18 02:37:32,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-03-18 02:37:32,319 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2022-03-18 02:37:32,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION
[2022-03-18 02:37:32,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2022-03-18 02:37:32,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72
[2022-03-18 02:37:32,320 INFO L87 Difference]: Start difference. First operand 58 states and 76 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7)
[2022-03-18 02:37:32,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-03-18 02:37:32,367 INFO L93 Difference]: Finished difference Result 65 states and 82 transitions.
[2022-03-18 02:37:32,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states.
[2022-03-18 02:37:32,367 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 46
[2022-03-18 02:37:32,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-03-18 02:37:32,369 INFO L225 Difference]: With dead ends: 65
[2022-03-18 02:37:32,369 INFO L226 Difference]: Without dead ends: 63
[2022-03-18 02:37:32,369 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2022-03-18 02:37:32,370 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 8 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-03-18 02:37:32,370 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 160 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-03-18 02:37:32,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states.
[2022-03-18 02:37:32,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62.
[2022-03-18 02:37:32,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 40 states have internal predecessors, (45), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16)
[2022-03-18 02:37:32,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 79 transitions.
[2022-03-18 02:37:32,390 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 79 transitions. Word has length 46
[2022-03-18 02:37:32,391 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-03-18 02:37:32,391 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 79 transitions.
[2022-03-18 02:37:32,391 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7)
[2022-03-18 02:37:32,392 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 79 transitions.
[2022-03-18 02:37:32,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52
[2022-03-18 02:37:32,392 INFO L492 BasicCegarLoop]: Found error trace
[2022-03-18 02:37:32,392 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-03-18 02:37:32,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0
[2022-03-18 02:37:32,607 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-03-18 02:37:32,608 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-03-18 02:37:32,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-03-18 02:37:32,608 INFO L85 PathProgramCache]: Analyzing trace with hash -300711301, now seen corresponding path program 1 times
[2022-03-18 02:37:32,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION
[2022-03-18 02:37:32,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1463477132]
[2022-03-18 02:37:32,609 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2022-03-18 02:37:32,609 INFO L85 PathProgramCache]: Analyzing trace with hash -300711301, now seen corresponding path program 2 times
[2022-03-18 02:37:32,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-03-18 02:37:32,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268958461]
[2022-03-18 02:37:32,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-03-18 02:37:32,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-03-18 02:37:32,626 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-03-18 02:37:32,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [282862593]
[2022-03-18 02:37:32,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-03-18 02:37:32,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-03-18 02:37:32,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-03-18 02:37:32,631 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-03-18 02:37:32,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process
[2022-03-18 02:37:32,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2022-03-18 02:37:32,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2022-03-18 02:37:32,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 23 conjunts are in the unsatisfiable core
[2022-03-18 02:37:32,679 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-03-18 02:37:32,861 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked.
[2022-03-18 02:37:32,861 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2022-03-18 02:37:32,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-03-18 02:37:32,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268958461]
[2022-03-18 02:37:32,934 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-03-18 02:37:32,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282862593]
[2022-03-18 02:37:32,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282862593] provided 0 perfect and 1 imperfect interpolant sequences
[2022-03-18 02:37:32,934 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences.
[2022-03-18 02:37:32,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7
[2022-03-18 02:37:32,934 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace
[2022-03-18 02:37:32,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1463477132]
[2022-03-18 02:37:32,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1463477132] provided 1 perfect and 0 imperfect interpolant sequences
[2022-03-18 02:37:32,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-03-18 02:37:32,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2022-03-18 02:37:32,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559740333]
[2022-03-18 02:37:32,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-03-18 02:37:32,935 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2022-03-18 02:37:32,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION
[2022-03-18 02:37:32,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2022-03-18 02:37:32,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72
[2022-03-18 02:37:32,935 INFO L87 Difference]: Start difference. First operand 62 states and 79 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8)
[2022-03-18 02:37:33,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-03-18 02:37:33,017 INFO L93 Difference]: Finished difference Result 69 states and 85 transitions.
[2022-03-18 02:37:33,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states.
[2022-03-18 02:37:33,017 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51
[2022-03-18 02:37:33,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-03-18 02:37:33,018 INFO L225 Difference]: With dead ends: 69
[2022-03-18 02:37:33,018 INFO L226 Difference]: Without dead ends: 67
[2022-03-18 02:37:33,019 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110
[2022-03-18 02:37:33,019 INFO L912 BasicCegarLoop]: 35 mSDtfsCounter, 12 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-03-18 02:37:33,019 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 176 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-03-18 02:37:33,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states.
[2022-03-18 02:37:33,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66.
[2022-03-18 02:37:33,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 40 states have (on average 1.2) internal successors, (48), 43 states have internal predecessors, (48), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16)
[2022-03-18 02:37:33,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 82 transitions.
[2022-03-18 02:37:33,027 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 82 transitions. Word has length 51
[2022-03-18 02:37:33,027 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-03-18 02:37:33,027 INFO L478 AbstractCegarLoop]: Abstraction has 66 states and 82 transitions.
[2022-03-18 02:37:33,027 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8)
[2022-03-18 02:37:33,027 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 82 transitions.
[2022-03-18 02:37:33,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60
[2022-03-18 02:37:33,028 INFO L492 BasicCegarLoop]: Found error trace
[2022-03-18 02:37:33,028 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-03-18 02:37:33,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0
[2022-03-18 02:37:33,243 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-03-18 02:37:33,243 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-03-18 02:37:33,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-03-18 02:37:33,244 INFO L85 PathProgramCache]: Analyzing trace with hash -2044027516, now seen corresponding path program 1 times
[2022-03-18 02:37:33,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION
[2022-03-18 02:37:33,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1321487886]
[2022-03-18 02:37:33,244 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2022-03-18 02:37:33,244 INFO L85 PathProgramCache]: Analyzing trace with hash -2044027516, now seen corresponding path program 2 times
[2022-03-18 02:37:33,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-03-18 02:37:33,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367942658]
[2022-03-18 02:37:33,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-03-18 02:37:33,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-03-18 02:37:33,253 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-03-18 02:37:33,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [512820094]
[2022-03-18 02:37:33,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-03-18 02:37:33,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-03-18 02:37:33,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-03-18 02:37:33,258 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-03-18 02:37:33,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process
[2022-03-18 02:37:33,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2022-03-18 02:37:33,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2022-03-18 02:37:33,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 11 conjunts are in the unsatisfiable core
[2022-03-18 02:37:33,301 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-03-18 02:37:33,397 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked.
[2022-03-18 02:37:33,397 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2022-03-18 02:37:33,486 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked.
[2022-03-18 02:37:33,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-03-18 02:37:33,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367942658]
[2022-03-18 02:37:33,487 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-03-18 02:37:33,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512820094]
[2022-03-18 02:37:33,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512820094] provided 0 perfect and 2 imperfect interpolant sequences
[2022-03-18 02:37:33,487 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2022-03-18 02:37:33,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7
[2022-03-18 02:37:33,489 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace
[2022-03-18 02:37:33,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1321487886]
[2022-03-18 02:37:33,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1321487886] provided 1 perfect and 0 imperfect interpolant sequences
[2022-03-18 02:37:33,489 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-03-18 02:37:33,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2022-03-18 02:37:33,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426928862]
[2022-03-18 02:37:33,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-03-18 02:37:33,490 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2022-03-18 02:37:33,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION
[2022-03-18 02:37:33,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2022-03-18 02:37:33,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42
[2022-03-18 02:37:33,490 INFO L87 Difference]: Start difference. First operand 66 states and 82 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9)
[2022-03-18 02:37:33,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-03-18 02:37:33,546 INFO L93 Difference]: Finished difference Result 96 states and 131 transitions.
[2022-03-18 02:37:33,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states.
[2022-03-18 02:37:33,547 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 59
[2022-03-18 02:37:33,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-03-18 02:37:33,549 INFO L225 Difference]: With dead ends: 96
[2022-03-18 02:37:33,549 INFO L226 Difference]: Without dead ends: 94
[2022-03-18 02:37:33,550 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56
[2022-03-18 02:37:33,551 INFO L912 BasicCegarLoop]: 53 mSDtfsCounter, 9 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-03-18 02:37:33,551 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 230 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-03-18 02:37:33,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states.
[2022-03-18 02:37:33,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 84.
[2022-03-18 02:37:33,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 52 states have internal predecessors, (61), 26 states have call successors, (26), 9 states have call predecessors, (26), 8 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24)
[2022-03-18 02:37:33,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 111 transitions.
[2022-03-18 02:37:33,566 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 111 transitions. Word has length 59
[2022-03-18 02:37:33,567 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-03-18 02:37:33,567 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 111 transitions.
[2022-03-18 02:37:33,567 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9)
[2022-03-18 02:37:33,567 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 111 transitions.
[2022-03-18 02:37:33,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61
[2022-03-18 02:37:33,568 INFO L492 BasicCegarLoop]: Found error trace
[2022-03-18 02:37:33,568 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-03-18 02:37:33,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0
[2022-03-18 02:37:33,783 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8
[2022-03-18 02:37:33,784 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-03-18 02:37:33,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-03-18 02:37:33,784 INFO L85 PathProgramCache]: Analyzing trace with hash 35160305, now seen corresponding path program 1 times
[2022-03-18 02:37:33,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION
[2022-03-18 02:37:33,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1545284756]
[2022-03-18 02:37:33,785 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2022-03-18 02:37:33,785 INFO L85 PathProgramCache]: Analyzing trace with hash 35160305, now seen corresponding path program 2 times
[2022-03-18 02:37:33,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-03-18 02:37:33,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963225085]
[2022-03-18 02:37:33,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-03-18 02:37:33,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-03-18 02:37:33,792 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-03-18 02:37:33,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1921741910]
[2022-03-18 02:37:33,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-03-18 02:37:33,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-03-18 02:37:33,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-03-18 02:37:33,793 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-03-18 02:37:33,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process
[2022-03-18 02:37:33,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2022-03-18 02:37:33,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2022-03-18 02:37:33,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 9 conjunts are in the unsatisfiable core
[2022-03-18 02:37:33,831 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-03-18 02:37:33,921 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked.
[2022-03-18 02:37:33,922 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2022-03-18 02:37:34,016 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked.
[2022-03-18 02:37:34,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-03-18 02:37:34,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963225085]
[2022-03-18 02:37:34,017 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-03-18 02:37:34,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921741910]
[2022-03-18 02:37:34,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921741910] provided 0 perfect and 2 imperfect interpolant sequences
[2022-03-18 02:37:34,017 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2022-03-18 02:37:34,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9
[2022-03-18 02:37:34,017 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace
[2022-03-18 02:37:34,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1545284756]
[2022-03-18 02:37:34,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1545284756] provided 1 perfect and 0 imperfect interpolant sequences
[2022-03-18 02:37:34,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-03-18 02:37:34,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2022-03-18 02:37:34,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827481953]
[2022-03-18 02:37:34,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-03-18 02:37:34,018 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2022-03-18 02:37:34,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION
[2022-03-18 02:37:34,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2022-03-18 02:37:34,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72
[2022-03-18 02:37:34,019 INFO L87 Difference]: Start difference. First operand 84 states and 111 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9)
[2022-03-18 02:37:34,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-03-18 02:37:34,063 INFO L93 Difference]: Finished difference Result 111 states and 135 transitions.
[2022-03-18 02:37:34,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states.
[2022-03-18 02:37:34,064 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 60
[2022-03-18 02:37:34,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-03-18 02:37:34,066 INFO L225 Difference]: With dead ends: 111
[2022-03-18 02:37:34,066 INFO L226 Difference]: Without dead ends: 103
[2022-03-18 02:37:34,066 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90
[2022-03-18 02:37:34,067 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 14 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-03-18 02:37:34,067 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 131 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-03-18 02:37:34,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states.
[2022-03-18 02:37:34,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103.
[2022-03-18 02:37:34,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 64 states have (on average 1.1875) internal successors, (76), 67 states have internal predecessors, (76), 26 states have call successors, (26), 13 states have call predecessors, (26), 12 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24)
[2022-03-18 02:37:34,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 126 transitions.
[2022-03-18 02:37:34,080 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 126 transitions. Word has length 60
[2022-03-18 02:37:34,081 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-03-18 02:37:34,081 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 126 transitions.
[2022-03-18 02:37:34,081 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9)
[2022-03-18 02:37:34,081 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 126 transitions.
[2022-03-18 02:37:34,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62
[2022-03-18 02:37:34,082 INFO L492 BasicCegarLoop]: Found error trace
[2022-03-18 02:37:34,082 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-03-18 02:37:34,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0
[2022-03-18 02:37:34,295 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9
[2022-03-18 02:37:34,295 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-03-18 02:37:34,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-03-18 02:37:34,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1088000375, now seen corresponding path program 1 times
[2022-03-18 02:37:34,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION
[2022-03-18 02:37:34,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1118097246]
[2022-03-18 02:37:34,303 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2022-03-18 02:37:34,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1088000375, now seen corresponding path program 2 times
[2022-03-18 02:37:34,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-03-18 02:37:34,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15697882]
[2022-03-18 02:37:34,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-03-18 02:37:34,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-03-18 02:37:34,310 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-03-18 02:37:34,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1370081857]
[2022-03-18 02:37:34,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-03-18 02:37:34,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-03-18 02:37:34,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-03-18 02:37:34,311 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-03-18 02:37:34,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process
[2022-03-18 02:37:34,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2022-03-18 02:37:34,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2022-03-18 02:37:34,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 9 conjunts are in the unsatisfiable core
[2022-03-18 02:37:34,347 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-03-18 02:37:34,454 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked.
[2022-03-18 02:37:34,454 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2022-03-18 02:37:34,575 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked.
[2022-03-18 02:37:34,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-03-18 02:37:34,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15697882]
[2022-03-18 02:37:34,576 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-03-18 02:37:34,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370081857]
[2022-03-18 02:37:34,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370081857] provided 0 perfect and 2 imperfect interpolant sequences
[2022-03-18 02:37:34,576 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2022-03-18 02:37:34,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9
[2022-03-18 02:37:34,576 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace
[2022-03-18 02:37:34,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1118097246]
[2022-03-18 02:37:34,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1118097246] provided 1 perfect and 0 imperfect interpolant sequences
[2022-03-18 02:37:34,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-03-18 02:37:34,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2022-03-18 02:37:34,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153161858]
[2022-03-18 02:37:34,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-03-18 02:37:34,577 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2022-03-18 02:37:34,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION
[2022-03-18 02:37:34,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2022-03-18 02:37:34,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72
[2022-03-18 02:37:34,577 INFO L87 Difference]: Start difference. First operand 103 states and 126 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9)
[2022-03-18 02:37:34,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-03-18 02:37:34,718 INFO L93 Difference]: Finished difference Result 182 states and 256 transitions.
[2022-03-18 02:37:34,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states.
[2022-03-18 02:37:34,719 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 61
[2022-03-18 02:37:34,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-03-18 02:37:34,721 INFO L225 Difference]: With dead ends: 182
[2022-03-18 02:37:34,722 INFO L226 Difference]: Without dead ends: 174
[2022-03-18 02:37:34,722 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240
[2022-03-18 02:37:34,722 INFO L912 BasicCegarLoop]: 71 mSDtfsCounter, 61 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-03-18 02:37:34,723 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 390 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-03-18 02:37:34,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states.
[2022-03-18 02:37:34,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 146.
[2022-03-18 02:37:34,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 90 states have (on average 1.2777777777777777) internal successors, (115), 94 states have internal predecessors, (115), 43 states have call successors, (43), 13 states have call predecessors, (43), 12 states have return successors, (41), 38 states have call predecessors, (41), 41 states have call successors, (41)
[2022-03-18 02:37:34,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 199 transitions.
[2022-03-18 02:37:34,737 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 199 transitions. Word has length 61
[2022-03-18 02:37:34,737 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-03-18 02:37:34,738 INFO L478 AbstractCegarLoop]: Abstraction has 146 states and 199 transitions.
[2022-03-18 02:37:34,738 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9)
[2022-03-18 02:37:34,738 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 199 transitions.
[2022-03-18 02:37:34,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63
[2022-03-18 02:37:34,738 INFO L492 BasicCegarLoop]: Found error trace
[2022-03-18 02:37:34,738 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-03-18 02:37:34,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0
[2022-03-18 02:37:34,951 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10
[2022-03-18 02:37:34,952 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-03-18 02:37:34,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-03-18 02:37:34,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1537891564, now seen corresponding path program 1 times
[2022-03-18 02:37:34,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION
[2022-03-18 02:37:34,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1713881349]
[2022-03-18 02:37:34,952 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2022-03-18 02:37:34,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1537891564, now seen corresponding path program 2 times
[2022-03-18 02:37:34,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-03-18 02:37:34,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857814879]
[2022-03-18 02:37:34,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-03-18 02:37:34,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-03-18 02:37:34,959 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-03-18 02:37:34,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [850564037]
[2022-03-18 02:37:34,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-03-18 02:37:34,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-03-18 02:37:34,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-03-18 02:37:34,960 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-03-18 02:37:34,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process
[2022-03-18 02:37:34,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2022-03-18 02:37:35,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2022-03-18 02:37:35,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 9 conjunts are in the unsatisfiable core
[2022-03-18 02:37:35,002 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-03-18 02:37:35,089 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked.
[2022-03-18 02:37:35,090 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2022-03-18 02:37:35,196 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked.
[2022-03-18 02:37:35,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-03-18 02:37:35,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857814879]
[2022-03-18 02:37:35,196 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-03-18 02:37:35,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850564037]
[2022-03-18 02:37:35,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850564037] provided 0 perfect and 2 imperfect interpolant sequences
[2022-03-18 02:37:35,196 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2022-03-18 02:37:35,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9
[2022-03-18 02:37:35,197 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace
[2022-03-18 02:37:35,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1713881349]
[2022-03-18 02:37:35,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1713881349] provided 1 perfect and 0 imperfect interpolant sequences
[2022-03-18 02:37:35,197 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-03-18 02:37:35,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2022-03-18 02:37:35,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294661546]
[2022-03-18 02:37:35,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-03-18 02:37:35,197 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2022-03-18 02:37:35,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION
[2022-03-18 02:37:35,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2022-03-18 02:37:35,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72
[2022-03-18 02:37:35,198 INFO L87 Difference]: Start difference. First operand 146 states and 199 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9)
[2022-03-18 02:37:35,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-03-18 02:37:35,244 INFO L93 Difference]: Finished difference Result 183 states and 250 transitions.
[2022-03-18 02:37:35,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states.
[2022-03-18 02:37:35,244 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 62
[2022-03-18 02:37:35,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-03-18 02:37:35,245 INFO L225 Difference]: With dead ends: 183
[2022-03-18 02:37:35,245 INFO L226 Difference]: Without dead ends: 146
[2022-03-18 02:37:35,246 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90
[2022-03-18 02:37:35,246 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 16 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-03-18 02:37:35,246 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 130 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-03-18 02:37:35,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states.
[2022-03-18 02:37:35,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146.
[2022-03-18 02:37:35,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 90 states have (on average 1.2666666666666666) internal successors, (114), 94 states have internal predecessors, (114), 43 states have call successors, (43), 13 states have call predecessors, (43), 12 states have return successors, (41), 38 states have call predecessors, (41), 41 states have call successors, (41)
[2022-03-18 02:37:35,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 198 transitions.
[2022-03-18 02:37:35,259 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 198 transitions. Word has length 62
[2022-03-18 02:37:35,260 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-03-18 02:37:35,260 INFO L478 AbstractCegarLoop]: Abstraction has 146 states and 198 transitions.
[2022-03-18 02:37:35,260 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9)
[2022-03-18 02:37:35,260 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 198 transitions.
[2022-03-18 02:37:35,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67
[2022-03-18 02:37:35,260 INFO L492 BasicCegarLoop]: Found error trace
[2022-03-18 02:37:35,260 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-03-18 02:37:35,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0
[2022-03-18 02:37:35,472 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11
[2022-03-18 02:37:35,472 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-03-18 02:37:35,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-03-18 02:37:35,473 INFO L85 PathProgramCache]: Analyzing trace with hash -385934262, now seen corresponding path program 1 times
[2022-03-18 02:37:35,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION
[2022-03-18 02:37:35,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1566535956]
[2022-03-18 02:37:35,473 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2022-03-18 02:37:35,473 INFO L85 PathProgramCache]: Analyzing trace with hash -385934262, now seen corresponding path program 2 times
[2022-03-18 02:37:35,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-03-18 02:37:35,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915322193]
[2022-03-18 02:37:35,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-03-18 02:37:35,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-03-18 02:37:35,484 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-03-18 02:37:35,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [220720045]
[2022-03-18 02:37:35,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-03-18 02:37:35,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-03-18 02:37:35,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-03-18 02:37:35,489 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-03-18 02:37:35,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process
[2022-03-18 02:37:35,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2022-03-18 02:37:35,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2022-03-18 02:37:35,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 11 conjunts are in the unsatisfiable core
[2022-03-18 02:37:35,534 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-03-18 02:37:35,636 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked.
[2022-03-18 02:37:35,636 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2022-03-18 02:37:35,745 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked.
[2022-03-18 02:37:35,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-03-18 02:37:35,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915322193]
[2022-03-18 02:37:35,745 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-03-18 02:37:35,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220720045]
[2022-03-18 02:37:35,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220720045] provided 0 perfect and 2 imperfect interpolant sequences
[2022-03-18 02:37:35,745 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2022-03-18 02:37:35,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9
[2022-03-18 02:37:35,745 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace
[2022-03-18 02:37:35,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1566535956]
[2022-03-18 02:37:35,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1566535956] provided 1 perfect and 0 imperfect interpolant sequences
[2022-03-18 02:37:35,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-03-18 02:37:35,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2022-03-18 02:37:35,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034299580]
[2022-03-18 02:37:35,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-03-18 02:37:35,746 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2022-03-18 02:37:35,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION
[2022-03-18 02:37:35,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2022-03-18 02:37:35,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72
[2022-03-18 02:37:35,746 INFO L87 Difference]: Start difference. First operand 146 states and 198 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9)
[2022-03-18 02:37:35,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-03-18 02:37:35,820 INFO L93 Difference]: Finished difference Result 253 states and 351 transitions.
[2022-03-18 02:37:35,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states.
[2022-03-18 02:37:35,820 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 66
[2022-03-18 02:37:35,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-03-18 02:37:35,821 INFO L225 Difference]: With dead ends: 253
[2022-03-18 02:37:35,821 INFO L226 Difference]: Without dead ends: 173
[2022-03-18 02:37:35,824 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 123 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110
[2022-03-18 02:37:35,825 INFO L912 BasicCegarLoop]: 50 mSDtfsCounter, 41 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-03-18 02:37:35,825 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 159 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-03-18 02:37:35,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states.
[2022-03-18 02:37:35,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 171.
[2022-03-18 02:37:35,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 108 states have (on average 1.2314814814814814) internal successors, (133), 111 states have internal predecessors, (133), 46 states have call successors, (46), 17 states have call predecessors, (46), 16 states have return successors, (44), 42 states have call predecessors, (44), 44 states have call successors, (44)
[2022-03-18 02:37:35,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 223 transitions.
[2022-03-18 02:37:35,844 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 223 transitions. Word has length 66
[2022-03-18 02:37:35,844 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-03-18 02:37:35,844 INFO L478 AbstractCegarLoop]: Abstraction has 171 states and 223 transitions.
[2022-03-18 02:37:35,844 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9)
[2022-03-18 02:37:35,844 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 223 transitions.
[2022-03-18 02:37:35,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69
[2022-03-18 02:37:35,844 INFO L492 BasicCegarLoop]: Found error trace
[2022-03-18 02:37:35,845 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1]
[2022-03-18 02:37:35,874 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0
[2022-03-18 02:37:36,059 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12
[2022-03-18 02:37:36,059 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-03-18 02:37:36,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-03-18 02:37:36,060 INFO L85 PathProgramCache]: Analyzing trace with hash 792554045, now seen corresponding path program 1 times
[2022-03-18 02:37:36,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION
[2022-03-18 02:37:36,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1166661913]
[2022-03-18 02:37:36,060 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2022-03-18 02:37:36,060 INFO L85 PathProgramCache]: Analyzing trace with hash 792554045, now seen corresponding path program 2 times
[2022-03-18 02:37:36,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-03-18 02:37:36,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474805350]
[2022-03-18 02:37:36,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-03-18 02:37:36,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-03-18 02:37:36,066 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-03-18 02:37:36,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2005302085]
[2022-03-18 02:37:36,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-03-18 02:37:36,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-03-18 02:37:36,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-03-18 02:37:36,067 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-03-18 02:37:36,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process
[2022-03-18 02:37:36,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2022-03-18 02:37:36,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2022-03-18 02:37:36,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 24 conjunts are in the unsatisfiable core
[2022-03-18 02:37:36,113 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-03-18 02:37:36,261 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked.
[2022-03-18 02:37:36,261 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2022-03-18 02:37:36,437 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked.
[2022-03-18 02:37:36,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-03-18 02:37:36,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474805350]
[2022-03-18 02:37:36,437 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-03-18 02:37:36,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005302085]
[2022-03-18 02:37:36,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005302085] provided 0 perfect and 2 imperfect interpolant sequences
[2022-03-18 02:37:36,437 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2022-03-18 02:37:36,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13
[2022-03-18 02:37:36,437 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace
[2022-03-18 02:37:36,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1166661913]
[2022-03-18 02:37:36,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1166661913] provided 1 perfect and 0 imperfect interpolant sequences
[2022-03-18 02:37:36,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-03-18 02:37:36,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10
[2022-03-18 02:37:36,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999441953]
[2022-03-18 02:37:36,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-03-18 02:37:36,438 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states
[2022-03-18 02:37:36,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION
[2022-03-18 02:37:36,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2022-03-18 02:37:36,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156
[2022-03-18 02:37:36,439 INFO L87 Difference]: Start difference. First operand 171 states and 223 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10)
[2022-03-18 02:37:36,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-03-18 02:37:36,612 INFO L93 Difference]: Finished difference Result 195 states and 259 transitions.
[2022-03-18 02:37:36,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states.
[2022-03-18 02:37:36,613 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 68
[2022-03-18 02:37:36,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-03-18 02:37:36,614 INFO L225 Difference]: With dead ends: 195
[2022-03-18 02:37:36,614 INFO L226 Difference]: Without dead ends: 193
[2022-03-18 02:37:36,614 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 123 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272
[2022-03-18 02:37:36,615 INFO L912 BasicCegarLoop]: 47 mSDtfsCounter, 22 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-03-18 02:37:36,615 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 349 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-03-18 02:37:36,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states.
[2022-03-18 02:37:36,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 190.
[2022-03-18 02:37:36,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 117 states have (on average 1.2478632478632479) internal successors, (146), 121 states have internal predecessors, (146), 55 states have call successors, (55), 18 states have call predecessors, (55), 17 states have return successors, (53), 50 states have call predecessors, (53), 53 states have call successors, (53)
[2022-03-18 02:37:36,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 254 transitions.
[2022-03-18 02:37:36,631 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 254 transitions. Word has length 68
[2022-03-18 02:37:36,631 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-03-18 02:37:36,631 INFO L478 AbstractCegarLoop]: Abstraction has 190 states and 254 transitions.
[2022-03-18 02:37:36,632 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10)
[2022-03-18 02:37:36,632 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 254 transitions.
[2022-03-18 02:37:36,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74
[2022-03-18 02:37:36,632 INFO L492 BasicCegarLoop]: Found error trace
[2022-03-18 02:37:36,632 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-03-18 02:37:36,650 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0
[2022-03-18 02:37:36,847 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13
[2022-03-18 02:37:36,847 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-03-18 02:37:36,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-03-18 02:37:36,848 INFO L85 PathProgramCache]: Analyzing trace with hash 783638790, now seen corresponding path program 3 times
[2022-03-18 02:37:36,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION
[2022-03-18 02:37:36,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2001635296]
[2022-03-18 02:37:36,848 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2022-03-18 02:37:36,848 INFO L85 PathProgramCache]: Analyzing trace with hash 783638790, now seen corresponding path program 4 times
[2022-03-18 02:37:36,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-03-18 02:37:36,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724432957]
[2022-03-18 02:37:36,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-03-18 02:37:36,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-03-18 02:37:36,854 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-03-18 02:37:36,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1573020896]
[2022-03-18 02:37:36,854 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
[2022-03-18 02:37:36,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-03-18 02:37:36,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-03-18 02:37:36,861 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-03-18 02:37:36,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process
[2022-03-18 02:37:36,902 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2022-03-18 02:37:36,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2022-03-18 02:37:36,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 29 conjunts are in the unsatisfiable core
[2022-03-18 02:37:36,905 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-03-18 02:37:37,201 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked.
[2022-03-18 02:37:37,201 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2022-03-18 02:37:37,333 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked.
[2022-03-18 02:37:37,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-03-18 02:37:37,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724432957]
[2022-03-18 02:37:37,333 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-03-18 02:37:37,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573020896]
[2022-03-18 02:37:37,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573020896] provided 0 perfect and 2 imperfect interpolant sequences
[2022-03-18 02:37:37,333 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2022-03-18 02:37:37,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10
[2022-03-18 02:37:37,334 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace
[2022-03-18 02:37:37,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2001635296]
[2022-03-18 02:37:37,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2001635296] provided 1 perfect and 0 imperfect interpolant sequences
[2022-03-18 02:37:37,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-03-18 02:37:37,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2022-03-18 02:37:37,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407357021]
[2022-03-18 02:37:37,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-03-18 02:37:37,334 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2022-03-18 02:37:37,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION
[2022-03-18 02:37:37,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2022-03-18 02:37:37,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90
[2022-03-18 02:37:37,335 INFO L87 Difference]: Start difference. First operand 190 states and 254 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11)
[2022-03-18 02:37:37,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-03-18 02:37:37,439 INFO L93 Difference]: Finished difference Result 199 states and 262 transitions.
[2022-03-18 02:37:37,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states.
[2022-03-18 02:37:37,440 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 73
[2022-03-18 02:37:37,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-03-18 02:37:37,441 INFO L225 Difference]: With dead ends: 199
[2022-03-18 02:37:37,441 INFO L226 Difference]: Without dead ends: 197
[2022-03-18 02:37:37,441 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132
[2022-03-18 02:37:37,442 INFO L912 BasicCegarLoop]: 55 mSDtfsCounter, 17 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-03-18 02:37:37,442 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 277 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-03-18 02:37:37,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states.
[2022-03-18 02:37:37,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 194.
[2022-03-18 02:37:37,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 120 states have (on average 1.2416666666666667) internal successors, (149), 124 states have internal predecessors, (149), 55 states have call successors, (55), 19 states have call predecessors, (55), 18 states have return successors, (53), 50 states have call predecessors, (53), 53 states have call successors, (53)
[2022-03-18 02:37:37,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 257 transitions.
[2022-03-18 02:37:37,458 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 257 transitions. Word has length 73
[2022-03-18 02:37:37,458 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-03-18 02:37:37,458 INFO L478 AbstractCegarLoop]: Abstraction has 194 states and 257 transitions.
[2022-03-18 02:37:37,458 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11)
[2022-03-18 02:37:37,458 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 257 transitions.
[2022-03-18 02:37:37,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79
[2022-03-18 02:37:37,459 INFO L492 BasicCegarLoop]: Found error trace
[2022-03-18 02:37:37,459 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-03-18 02:37:37,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0
[2022-03-18 02:37:37,679 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-03-18 02:37:37,679 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-03-18 02:37:37,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-03-18 02:37:37,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1625446301, now seen corresponding path program 5 times
[2022-03-18 02:37:37,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION
[2022-03-18 02:37:37,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [102078895]
[2022-03-18 02:37:37,680 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2022-03-18 02:37:37,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1625446301, now seen corresponding path program 6 times
[2022-03-18 02:37:37,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-03-18 02:37:37,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080014806]
[2022-03-18 02:37:37,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-03-18 02:37:37,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-03-18 02:37:37,686 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-03-18 02:37:37,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1151498549]
[2022-03-18 02:37:37,686 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE
[2022-03-18 02:37:37,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-03-18 02:37:37,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-03-18 02:37:37,687 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-03-18 02:37:37,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process
[2022-03-18 02:37:37,736 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s)
[2022-03-18 02:37:37,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2022-03-18 02:37:37,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 45 conjunts are in the unsatisfiable core
[2022-03-18 02:37:37,739 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-03-18 02:37:38,391 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 31 proven. 19 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked.
[2022-03-18 02:37:38,391 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2022-03-18 02:37:38,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-03-18 02:37:38,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080014806]
[2022-03-18 02:37:38,498 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-03-18 02:37:38,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151498549]
[2022-03-18 02:37:38,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151498549] provided 0 perfect and 1 imperfect interpolant sequences
[2022-03-18 02:37:38,498 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences.
[2022-03-18 02:37:38,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13
[2022-03-18 02:37:38,498 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace
[2022-03-18 02:37:38,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [102078895]
[2022-03-18 02:37:38,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [102078895] provided 1 perfect and 0 imperfect interpolant sequences
[2022-03-18 02:37:38,498 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-03-18 02:37:38,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13
[2022-03-18 02:37:38,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758986182]
[2022-03-18 02:37:38,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-03-18 02:37:38,499 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states
[2022-03-18 02:37:38,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION
[2022-03-18 02:37:38,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2022-03-18 02:37:38,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210
[2022-03-18 02:37:38,499 INFO L87 Difference]: Start difference. First operand 194 states and 257 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 11 states have internal predecessors, (31), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12)
[2022-03-18 02:37:38,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-03-18 02:37:38,991 INFO L93 Difference]: Finished difference Result 203 states and 265 transitions.
[2022-03-18 02:37:38,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states.
[2022-03-18 02:37:38,996 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 11 states have internal predecessors, (31), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 78
[2022-03-18 02:37:38,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-03-18 02:37:38,997 INFO L225 Difference]: With dead ends: 203
[2022-03-18 02:37:38,997 INFO L226 Difference]: Without dead ends: 201
[2022-03-18 02:37:38,998 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380
[2022-03-18 02:37:38,998 INFO L912 BasicCegarLoop]: 37 mSDtfsCounter, 52 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2022-03-18 02:37:38,999 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 345 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2022-03-18 02:37:38,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states.
[2022-03-18 02:37:39,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 198.
[2022-03-18 02:37:39,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 123 states have (on average 1.2357723577235773) internal successors, (152), 127 states have internal predecessors, (152), 55 states have call successors, (55), 20 states have call predecessors, (55), 19 states have return successors, (53), 50 states have call predecessors, (53), 53 states have call successors, (53)
[2022-03-18 02:37:39,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 260 transitions.
[2022-03-18 02:37:39,018 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 260 transitions. Word has length 78
[2022-03-18 02:37:39,018 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-03-18 02:37:39,019 INFO L478 AbstractCegarLoop]: Abstraction has 198 states and 260 transitions.
[2022-03-18 02:37:39,019 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 11 states have internal predecessors, (31), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12)
[2022-03-18 02:37:39,019 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 260 transitions.
[2022-03-18 02:37:39,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83
[2022-03-18 02:37:39,020 INFO L492 BasicCegarLoop]: Found error trace
[2022-03-18 02:37:39,020 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-03-18 02:37:39,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0
[2022-03-18 02:37:39,231 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15
[2022-03-18 02:37:39,231 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-03-18 02:37:39,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-03-18 02:37:39,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1849570232, now seen corresponding path program 3 times
[2022-03-18 02:37:39,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION
[2022-03-18 02:37:39,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1837257219]
[2022-03-18 02:37:39,232 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2022-03-18 02:37:39,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1849570232, now seen corresponding path program 4 times
[2022-03-18 02:37:39,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-03-18 02:37:39,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658114054]
[2022-03-18 02:37:39,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-03-18 02:37:39,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-03-18 02:37:39,238 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-03-18 02:37:39,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [814513111]
[2022-03-18 02:37:39,238 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
[2022-03-18 02:37:39,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-03-18 02:37:39,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-03-18 02:37:39,241 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-03-18 02:37:39,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process
[2022-03-18 02:37:39,279 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2022-03-18 02:37:39,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2022-03-18 02:37:39,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 26 conjunts are in the unsatisfiable core
[2022-03-18 02:37:39,282 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-03-18 02:37:39,851 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 30 proven. 29 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked.
[2022-03-18 02:37:39,851 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2022-03-18 02:37:40,029 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 37 proven. 10 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked.
[2022-03-18 02:37:40,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-03-18 02:37:40,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658114054]
[2022-03-18 02:37:40,030 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-03-18 02:37:40,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814513111]
[2022-03-18 02:37:40,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814513111] provided 0 perfect and 2 imperfect interpolant sequences
[2022-03-18 02:37:40,030 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2022-03-18 02:37:40,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 16
[2022-03-18 02:37:40,030 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace
[2022-03-18 02:37:40,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1837257219]
[2022-03-18 02:37:40,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1837257219] provided 1 perfect and 0 imperfect interpolant sequences
[2022-03-18 02:37:40,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-03-18 02:37:40,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14
[2022-03-18 02:37:40,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121890040]
[2022-03-18 02:37:40,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-03-18 02:37:40,031 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states
[2022-03-18 02:37:40,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION
[2022-03-18 02:37:40,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants.
[2022-03-18 02:37:40,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240
[2022-03-18 02:37:40,032 INFO L87 Difference]: Start difference. First operand 198 states and 260 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13)
[2022-03-18 02:37:40,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-03-18 02:37:40,798 INFO L93 Difference]: Finished difference Result 212 states and 278 transitions.
[2022-03-18 02:37:40,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states.
[2022-03-18 02:37:40,799 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 82
[2022-03-18 02:37:40,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-03-18 02:37:40,800 INFO L225 Difference]: With dead ends: 212
[2022-03-18 02:37:40,800 INFO L226 Difference]: Without dead ends: 210
[2022-03-18 02:37:40,800 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 147 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506
[2022-03-18 02:37:40,800 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 50 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time
[2022-03-18 02:37:40,801 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 391 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time]
[2022-03-18 02:37:40,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states.
[2022-03-18 02:37:40,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 203.
[2022-03-18 02:37:40,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 126 states have (on average 1.2301587301587302) internal successors, (155), 131 states have internal predecessors, (155), 56 states have call successors, (56), 21 states have call predecessors, (56), 20 states have return successors, (54), 50 states have call predecessors, (54), 54 states have call successors, (54)
[2022-03-18 02:37:40,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 265 transitions.
[2022-03-18 02:37:40,818 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 265 transitions. Word has length 82
[2022-03-18 02:37:40,818 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-03-18 02:37:40,818 INFO L478 AbstractCegarLoop]: Abstraction has 203 states and 265 transitions.
[2022-03-18 02:37:40,819 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13)
[2022-03-18 02:37:40,819 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 265 transitions.
[2022-03-18 02:37:40,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84
[2022-03-18 02:37:40,819 INFO L492 BasicCegarLoop]: Found error trace
[2022-03-18 02:37:40,819 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-03-18 02:37:40,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0
[2022-03-18 02:37:41,035 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16
[2022-03-18 02:37:41,035 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-03-18 02:37:41,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-03-18 02:37:41,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1768368813, now seen corresponding path program 1 times
[2022-03-18 02:37:41,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION
[2022-03-18 02:37:41,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2072860949]
[2022-03-18 02:37:41,036 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2022-03-18 02:37:41,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1768368813, now seen corresponding path program 2 times
[2022-03-18 02:37:41,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-03-18 02:37:41,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263930338]
[2022-03-18 02:37:41,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-03-18 02:37:41,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-03-18 02:37:41,042 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-03-18 02:37:41,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [475836288]
[2022-03-18 02:37:41,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-03-18 02:37:41,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-03-18 02:37:41,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-03-18 02:37:41,047 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-03-18 02:37:41,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process
[2022-03-18 02:37:41,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2022-03-18 02:37:41,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2022-03-18 02:37:41,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 11 conjunts are in the unsatisfiable core
[2022-03-18 02:37:41,089 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-03-18 02:37:41,199 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 16 proven. 73 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked.
[2022-03-18 02:37:41,200 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2022-03-18 02:37:41,325 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked.
[2022-03-18 02:37:41,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-03-18 02:37:41,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263930338]
[2022-03-18 02:37:41,326 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-03-18 02:37:41,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475836288]
[2022-03-18 02:37:41,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475836288] provided 0 perfect and 2 imperfect interpolant sequences
[2022-03-18 02:37:41,326 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2022-03-18 02:37:41,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9
[2022-03-18 02:37:41,326 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace
[2022-03-18 02:37:41,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2072860949]
[2022-03-18 02:37:41,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2072860949] provided 1 perfect and 0 imperfect interpolant sequences
[2022-03-18 02:37:41,326 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-03-18 02:37:41,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2022-03-18 02:37:41,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419197848]
[2022-03-18 02:37:41,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-03-18 02:37:41,326 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2022-03-18 02:37:41,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION
[2022-03-18 02:37:41,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2022-03-18 02:37:41,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72
[2022-03-18 02:37:41,327 INFO L87 Difference]: Start difference. First operand 203 states and 265 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13)
[2022-03-18 02:37:41,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-03-18 02:37:41,403 INFO L93 Difference]: Finished difference Result 214 states and 277 transitions.
[2022-03-18 02:37:41,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states.
[2022-03-18 02:37:41,405 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 83
[2022-03-18 02:37:41,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-03-18 02:37:41,406 INFO L225 Difference]: With dead ends: 214
[2022-03-18 02:37:41,406 INFO L226 Difference]: Without dead ends: 206
[2022-03-18 02:37:41,407 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 157 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110
[2022-03-18 02:37:41,407 INFO L912 BasicCegarLoop]: 50 mSDtfsCounter, 13 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-03-18 02:37:41,407 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 154 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-03-18 02:37:41,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states.
[2022-03-18 02:37:41,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206.
[2022-03-18 02:37:41,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 129 states have (on average 1.2248062015503876) internal successors, (158), 134 states have internal predecessors, (158), 56 states have call successors, (56), 21 states have call predecessors, (56), 20 states have return successors, (54), 50 states have call predecessors, (54), 54 states have call successors, (54)
[2022-03-18 02:37:41,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 268 transitions.
[2022-03-18 02:37:41,424 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 268 transitions. Word has length 83
[2022-03-18 02:37:41,426 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-03-18 02:37:41,426 INFO L478 AbstractCegarLoop]: Abstraction has 206 states and 268 transitions.
[2022-03-18 02:37:41,426 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13)
[2022-03-18 02:37:41,426 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 268 transitions.
[2022-03-18 02:37:41,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85
[2022-03-18 02:37:41,427 INFO L492 BasicCegarLoop]: Found error trace
[2022-03-18 02:37:41,427 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-03-18 02:37:41,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0
[2022-03-18 02:37:41,643 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17
[2022-03-18 02:37:41,643 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-03-18 02:37:41,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-03-18 02:37:41,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1017110725, now seen corresponding path program 1 times
[2022-03-18 02:37:41,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION
[2022-03-18 02:37:41,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2084651302]
[2022-03-18 02:37:41,644 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2022-03-18 02:37:41,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1017110725, now seen corresponding path program 2 times
[2022-03-18 02:37:41,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-03-18 02:37:41,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836809248]
[2022-03-18 02:37:41,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-03-18 02:37:41,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-03-18 02:37:41,652 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-03-18 02:37:41,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [870258445]
[2022-03-18 02:37:41,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-03-18 02:37:41,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-03-18 02:37:41,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-03-18 02:37:41,654 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-03-18 02:37:41,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process
[2022-03-18 02:37:41,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2022-03-18 02:37:41,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2022-03-18 02:37:41,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 37 conjunts are in the unsatisfiable core
[2022-03-18 02:37:41,707 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-03-18 02:37:42,143 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked.
[2022-03-18 02:37:42,144 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2022-03-18 02:37:42,460 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked.
[2022-03-18 02:37:42,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-03-18 02:37:42,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836809248]
[2022-03-18 02:37:42,460 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-03-18 02:37:42,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870258445]
[2022-03-18 02:37:42,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870258445] provided 0 perfect and 2 imperfect interpolant sequences
[2022-03-18 02:37:42,460 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2022-03-18 02:37:42,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14
[2022-03-18 02:37:42,461 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace
[2022-03-18 02:37:42,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2084651302]
[2022-03-18 02:37:42,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2084651302] provided 1 perfect and 0 imperfect interpolant sequences
[2022-03-18 02:37:42,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-03-18 02:37:42,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9
[2022-03-18 02:37:42,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462166024]
[2022-03-18 02:37:42,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-03-18 02:37:42,461 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states
[2022-03-18 02:37:42,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION
[2022-03-18 02:37:42,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2022-03-18 02:37:42,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182
[2022-03-18 02:37:42,462 INFO L87 Difference]: Start difference. First operand 206 states and 268 transitions. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13)
[2022-03-18 02:37:42,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-03-18 02:37:42,673 INFO L93 Difference]: Finished difference Result 234 states and 311 transitions.
[2022-03-18 02:37:42,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states.
[2022-03-18 02:37:42,674 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 84
[2022-03-18 02:37:42,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-03-18 02:37:42,675 INFO L225 Difference]: With dead ends: 234
[2022-03-18 02:37:42,675 INFO L226 Difference]: Without dead ends: 232
[2022-03-18 02:37:42,675 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 154 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306
[2022-03-18 02:37:42,676 INFO L912 BasicCegarLoop]: 60 mSDtfsCounter, 25 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-03-18 02:37:42,676 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 401 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-03-18 02:37:42,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states.
[2022-03-18 02:37:42,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 229.
[2022-03-18 02:37:42,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 141 states have (on average 1.24822695035461) internal successors, (176), 148 states have internal predecessors, (176), 66 states have call successors, (66), 22 states have call predecessors, (66), 21 states have return successors, (64), 58 states have call predecessors, (64), 64 states have call successors, (64)
[2022-03-18 02:37:42,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 306 transitions.
[2022-03-18 02:37:42,695 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 306 transitions. Word has length 84
[2022-03-18 02:37:42,695 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-03-18 02:37:42,695 INFO L478 AbstractCegarLoop]: Abstraction has 229 states and 306 transitions.
[2022-03-18 02:37:42,696 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13)
[2022-03-18 02:37:42,696 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 306 transitions.
[2022-03-18 02:37:42,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88
[2022-03-18 02:37:42,696 INFO L492 BasicCegarLoop]: Found error trace
[2022-03-18 02:37:42,696 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-03-18 02:37:42,714 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0
[2022-03-18 02:37:42,911 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-03-18 02:37:42,911 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-03-18 02:37:42,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-03-18 02:37:42,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1676300815, now seen corresponding path program 3 times
[2022-03-18 02:37:42,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION
[2022-03-18 02:37:42,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1885706376]
[2022-03-18 02:37:42,912 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2022-03-18 02:37:42,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1676300815, now seen corresponding path program 4 times
[2022-03-18 02:37:42,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-03-18 02:37:42,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523016247]
[2022-03-18 02:37:42,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-03-18 02:37:42,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-03-18 02:37:42,926 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-03-18 02:37:42,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [35478654]
[2022-03-18 02:37:42,926 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
[2022-03-18 02:37:42,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-03-18 02:37:42,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-03-18 02:37:42,928 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-03-18 02:37:42,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process
[2022-03-18 02:37:42,989 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2022-03-18 02:37:42,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2022-03-18 02:37:42,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 5 conjunts are in the unsatisfiable core
[2022-03-18 02:37:42,992 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-03-18 02:37:43,107 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked.
[2022-03-18 02:37:43,107 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-03-18 02:37:43,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-03-18 02:37:43,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523016247]
[2022-03-18 02:37:43,108 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-03-18 02:37:43,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35478654]
[2022-03-18 02:37:43,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35478654] provided 1 perfect and 0 imperfect interpolant sequences
[2022-03-18 02:37:43,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-03-18 02:37:43,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2022-03-18 02:37:43,108 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace
[2022-03-18 02:37:43,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1885706376]
[2022-03-18 02:37:43,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1885706376] provided 1 perfect and 0 imperfect interpolant sequences
[2022-03-18 02:37:43,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-03-18 02:37:43,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2022-03-18 02:37:43,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041768251]
[2022-03-18 02:37:43,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-03-18 02:37:43,109 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2022-03-18 02:37:43,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION
[2022-03-18 02:37:43,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2022-03-18 02:37:43,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2022-03-18 02:37:43,109 INFO L87 Difference]: Start difference. First operand 229 states and 306 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13)
[2022-03-18 02:37:43,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-03-18 02:37:43,185 INFO L93 Difference]: Finished difference Result 371 states and 532 transitions.
[2022-03-18 02:37:43,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states.
[2022-03-18 02:37:43,186 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 87
[2022-03-18 02:37:43,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-03-18 02:37:43,188 INFO L225 Difference]: With dead ends: 371
[2022-03-18 02:37:43,188 INFO L226 Difference]: Without dead ends: 291
[2022-03-18 02:37:43,188 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42
[2022-03-18 02:37:43,189 INFO L912 BasicCegarLoop]: 61 mSDtfsCounter, 12 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-03-18 02:37:43,189 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 197 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-03-18 02:37:43,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states.
[2022-03-18 02:37:43,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 257.
[2022-03-18 02:37:43,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 161 states have (on average 1.2546583850931676) internal successors, (202), 168 states have internal predecessors, (202), 74 states have call successors, (74), 22 states have call predecessors, (74), 21 states have return successors, (72), 66 states have call predecessors, (72), 72 states have call successors, (72)
[2022-03-18 02:37:43,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 348 transitions.
[2022-03-18 02:37:43,215 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 348 transitions. Word has length 87
[2022-03-18 02:37:43,215 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-03-18 02:37:43,215 INFO L478 AbstractCegarLoop]: Abstraction has 257 states and 348 transitions.
[2022-03-18 02:37:43,215 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13)
[2022-03-18 02:37:43,215 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 348 transitions.
[2022-03-18 02:37:43,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90
[2022-03-18 02:37:43,215 INFO L492 BasicCegarLoop]: Found error trace
[2022-03-18 02:37:43,216 INFO L500 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-03-18 02:37:43,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0
[2022-03-18 02:37:43,433 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-03-18 02:37:43,433 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-03-18 02:37:43,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-03-18 02:37:43,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1175887352, now seen corresponding path program 1 times
[2022-03-18 02:37:43,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION
[2022-03-18 02:37:43,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1049290035]
[2022-03-18 02:37:43,434 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2022-03-18 02:37:43,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1175887352, now seen corresponding path program 2 times
[2022-03-18 02:37:43,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-03-18 02:37:43,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307172971]
[2022-03-18 02:37:43,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-03-18 02:37:43,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-03-18 02:37:43,438 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-03-18 02:37:43,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [737176649]
[2022-03-18 02:37:43,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-03-18 02:37:43,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-03-18 02:37:43,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-03-18 02:37:43,440 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-03-18 02:37:43,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process
[2022-03-18 02:37:43,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2022-03-18 02:37:43,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2022-03-18 02:37:43,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 18 conjunts are in the unsatisfiable core
[2022-03-18 02:37:43,486 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-03-18 02:37:43,654 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 37 proven. 10 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked.
[2022-03-18 02:37:43,654 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2022-03-18 02:37:43,818 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 40 proven. 7 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked.
[2022-03-18 02:37:43,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-03-18 02:37:43,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307172971]
[2022-03-18 02:37:43,818 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-03-18 02:37:43,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737176649]
[2022-03-18 02:37:43,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737176649] provided 0 perfect and 2 imperfect interpolant sequences
[2022-03-18 02:37:43,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2022-03-18 02:37:43,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12
[2022-03-18 02:37:43,818 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace
[2022-03-18 02:37:43,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1049290035]
[2022-03-18 02:37:43,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1049290035] provided 1 perfect and 0 imperfect interpolant sequences
[2022-03-18 02:37:43,819 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-03-18 02:37:43,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9
[2022-03-18 02:37:43,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472583347]
[2022-03-18 02:37:43,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-03-18 02:37:43,819 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states
[2022-03-18 02:37:43,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION
[2022-03-18 02:37:43,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2022-03-18 02:37:43,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132
[2022-03-18 02:37:43,819 INFO L87 Difference]: Start difference. First operand 257 states and 348 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12)
[2022-03-18 02:37:44,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-03-18 02:37:44,003 INFO L93 Difference]: Finished difference Result 301 states and 415 transitions.
[2022-03-18 02:37:44,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states.
[2022-03-18 02:37:44,003 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 89
[2022-03-18 02:37:44,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-03-18 02:37:44,004 INFO L225 Difference]: With dead ends: 301
[2022-03-18 02:37:44,005 INFO L226 Difference]: Without dead ends: 297
[2022-03-18 02:37:44,005 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 166 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182
[2022-03-18 02:37:44,005 INFO L912 BasicCegarLoop]: 47 mSDtfsCounter, 25 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-03-18 02:37:44,006 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 268 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-03-18 02:37:44,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states.
[2022-03-18 02:37:44,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 293.
[2022-03-18 02:37:44,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 183 states have (on average 1.273224043715847) internal successors, (233), 191 states have internal predecessors, (233), 87 states have call successors, (87), 23 states have call predecessors, (87), 22 states have return successors, (84), 78 states have call predecessors, (84), 84 states have call successors, (84)
[2022-03-18 02:37:44,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 404 transitions.
[2022-03-18 02:37:44,036 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 404 transitions. Word has length 89
[2022-03-18 02:37:44,036 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-03-18 02:37:44,036 INFO L478 AbstractCegarLoop]: Abstraction has 293 states and 404 transitions.
[2022-03-18 02:37:44,036 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12)
[2022-03-18 02:37:44,036 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 404 transitions.
[2022-03-18 02:37:44,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90
[2022-03-18 02:37:44,037 INFO L492 BasicCegarLoop]: Found error trace
[2022-03-18 02:37:44,037 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-03-18 02:37:44,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0
[2022-03-18 02:37:44,254 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20
[2022-03-18 02:37:44,254 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-03-18 02:37:44,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-03-18 02:37:44,255 INFO L85 PathProgramCache]: Analyzing trace with hash -201422586, now seen corresponding path program 1 times
[2022-03-18 02:37:44,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION
[2022-03-18 02:37:44,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2120166343]
[2022-03-18 02:37:44,255 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2022-03-18 02:37:44,255 INFO L85 PathProgramCache]: Analyzing trace with hash -201422586, now seen corresponding path program 2 times
[2022-03-18 02:37:44,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-03-18 02:37:44,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545702996]
[2022-03-18 02:37:44,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-03-18 02:37:44,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-03-18 02:37:44,272 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-03-18 02:37:44,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [706147294]
[2022-03-18 02:37:44,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-03-18 02:37:44,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-03-18 02:37:44,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-03-18 02:37:44,273 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-03-18 02:37:44,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process
[2022-03-18 02:37:44,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2022-03-18 02:37:44,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2022-03-18 02:37:44,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 13 conjunts are in the unsatisfiable core
[2022-03-18 02:37:44,320 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-03-18 02:37:44,471 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 21 proven. 78 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked.
[2022-03-18 02:37:44,471 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2022-03-18 02:37:44,606 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked.
[2022-03-18 02:37:44,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-03-18 02:37:44,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545702996]
[2022-03-18 02:37:44,607 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-03-18 02:37:44,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706147294]
[2022-03-18 02:37:44,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706147294] provided 0 perfect and 2 imperfect interpolant sequences
[2022-03-18 02:37:44,607 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2022-03-18 02:37:44,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8
[2022-03-18 02:37:44,607 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace
[2022-03-18 02:37:44,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2120166343]
[2022-03-18 02:37:44,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2120166343] provided 1 perfect and 0 imperfect interpolant sequences
[2022-03-18 02:37:44,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-03-18 02:37:44,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2022-03-18 02:37:44,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600581]
[2022-03-18 02:37:44,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-03-18 02:37:44,608 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2022-03-18 02:37:44,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION
[2022-03-18 02:37:44,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2022-03-18 02:37:44,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56
[2022-03-18 02:37:44,608 INFO L87 Difference]: Start difference. First operand 293 states and 404 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13)
[2022-03-18 02:37:44,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-03-18 02:37:44,719 INFO L93 Difference]: Finished difference Result 463 states and 647 transitions.
[2022-03-18 02:37:44,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states.
[2022-03-18 02:37:44,720 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 89
[2022-03-18 02:37:44,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-03-18 02:37:44,722 INFO L225 Difference]: With dead ends: 463
[2022-03-18 02:37:44,722 INFO L226 Difference]: Without dead ends: 329
[2022-03-18 02:37:44,723 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 170 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110
[2022-03-18 02:37:44,723 INFO L912 BasicCegarLoop]: 54 mSDtfsCounter, 44 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-03-18 02:37:44,723 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 169 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-03-18 02:37:44,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states.
[2022-03-18 02:37:44,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 327.
[2022-03-18 02:37:44,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 207 states have (on average 1.2367149758454106) internal successors, (256), 214 states have internal predecessors, (256), 90 states have call successors, (90), 30 states have call predecessors, (90), 29 states have return successors, (87), 82 states have call predecessors, (87), 87 states have call successors, (87)
[2022-03-18 02:37:44,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 433 transitions.
[2022-03-18 02:37:44,750 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 433 transitions. Word has length 89
[2022-03-18 02:37:44,751 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-03-18 02:37:44,751 INFO L478 AbstractCegarLoop]: Abstraction has 327 states and 433 transitions.
[2022-03-18 02:37:44,751 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13)
[2022-03-18 02:37:44,751 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 433 transitions.
[2022-03-18 02:37:44,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102
[2022-03-18 02:37:44,751 INFO L492 BasicCegarLoop]: Found error trace
[2022-03-18 02:37:44,751 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-03-18 02:37:44,769 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0
[2022-03-18 02:37:44,964 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21
[2022-03-18 02:37:44,964 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-03-18 02:37:44,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-03-18 02:37:44,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1415088729, now seen corresponding path program 1 times
[2022-03-18 02:37:44,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION
[2022-03-18 02:37:44,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [884782343]
[2022-03-18 02:37:44,965 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2022-03-18 02:37:44,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1415088729, now seen corresponding path program 2 times
[2022-03-18 02:37:44,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-03-18 02:37:44,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502818504]
[2022-03-18 02:37:44,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-03-18 02:37:44,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-03-18 02:37:44,970 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-03-18 02:37:44,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [483769530]
[2022-03-18 02:37:44,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-03-18 02:37:44,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-03-18 02:37:44,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-03-18 02:37:44,973 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-03-18 02:37:44,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process
[2022-03-18 02:37:45,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2022-03-18 02:37:45,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2022-03-18 02:37:45,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 64 conjunts are in the unsatisfiable core
[2022-03-18 02:37:45,031 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-03-18 02:37:48,685 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 84 proven. 53 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked.
[2022-03-18 02:37:48,685 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2022-03-18 02:37:48,986 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful
[2022-03-18 02:37:53,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-03-18 02:37:53,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502818504]
[2022-03-18 02:37:53,814 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-03-18 02:37:53,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483769530]
[2022-03-18 02:37:53,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483769530] provided 0 perfect and 1 imperfect interpolant sequences
[2022-03-18 02:37:53,814 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences.
[2022-03-18 02:37:53,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16
[2022-03-18 02:37:53,814 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace
[2022-03-18 02:37:53,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [884782343]
[2022-03-18 02:37:53,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [884782343] provided 1 perfect and 0 imperfect interpolant sequences
[2022-03-18 02:37:53,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-03-18 02:37:53,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16
[2022-03-18 02:37:53,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770525873]
[2022-03-18 02:37:53,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-03-18 02:37:53,815 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states
[2022-03-18 02:37:53,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION
[2022-03-18 02:37:53,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants.
[2022-03-18 02:37:53,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=368, Unknown=1, NotChecked=0, Total=462
[2022-03-18 02:37:53,815 INFO L87 Difference]: Start difference. First operand 327 states and 433 transitions. Second operand has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16)
[2022-03-18 02:37:56,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-03-18 02:37:56,168 INFO L93 Difference]: Finished difference Result 339 states and 443 transitions.
[2022-03-18 02:37:56,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states.
[2022-03-18 02:37:56,169 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) Word has length 101
[2022-03-18 02:37:56,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-03-18 02:37:56,170 INFO L225 Difference]: With dead ends: 339
[2022-03-18 02:37:56,170 INFO L226 Difference]: Without dead ends: 337
[2022-03-18 02:37:56,170 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=122, Invalid=527, Unknown=1, NotChecked=0, Total=650
[2022-03-18 02:37:56,171 INFO L912 BasicCegarLoop]: 48 mSDtfsCounter, 58 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time
[2022-03-18 02:37:56,171 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 401 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time]
[2022-03-18 02:37:56,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states.
[2022-03-18 02:37:56,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 335.
[2022-03-18 02:37:56,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 213 states have (on average 1.2300469483568075) internal successors, (262), 220 states have internal predecessors, (262), 90 states have call successors, (90), 32 states have call predecessors, (90), 31 states have return successors, (87), 82 states have call predecessors, (87), 87 states have call successors, (87)
[2022-03-18 02:37:56,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 439 transitions.
[2022-03-18 02:37:56,201 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 439 transitions. Word has length 101
[2022-03-18 02:37:56,201 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-03-18 02:37:56,201 INFO L478 AbstractCegarLoop]: Abstraction has 335 states and 439 transitions.
[2022-03-18 02:37:56,201 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16)
[2022-03-18 02:37:56,201 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 439 transitions.
[2022-03-18 02:37:56,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106
[2022-03-18 02:37:56,202 INFO L492 BasicCegarLoop]: Found error trace
[2022-03-18 02:37:56,202 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-03-18 02:37:56,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0
[2022-03-18 02:37:56,415 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-03-18 02:37:56,415 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-03-18 02:37:56,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-03-18 02:37:56,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1524088572, now seen corresponding path program 5 times
[2022-03-18 02:37:56,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION
[2022-03-18 02:37:56,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [723668442]
[2022-03-18 02:37:56,416 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2022-03-18 02:37:56,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1524088572, now seen corresponding path program 6 times
[2022-03-18 02:37:56,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-03-18 02:37:56,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116695253]
[2022-03-18 02:37:56,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-03-18 02:37:56,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-03-18 02:37:56,421 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-03-18 02:37:56,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1294485475]
[2022-03-18 02:37:56,422 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE
[2022-03-18 02:37:56,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-03-18 02:37:56,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-03-18 02:37:56,426 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-03-18 02:37:56,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process
[2022-03-18 02:37:56,493 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s)
[2022-03-18 02:37:56,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2022-03-18 02:37:56,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 12 conjunts are in the unsatisfiable core
[2022-03-18 02:37:56,497 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-03-18 02:37:56,641 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 64 proven. 10 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked.
[2022-03-18 02:37:56,641 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2022-03-18 02:37:56,795 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 64 proven. 10 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked.
[2022-03-18 02:37:56,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-03-18 02:37:56,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116695253]
[2022-03-18 02:37:56,796 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-03-18 02:37:56,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294485475]
[2022-03-18 02:37:56,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294485475] provided 0 perfect and 2 imperfect interpolant sequences
[2022-03-18 02:37:56,796 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2022-03-18 02:37:56,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8
[2022-03-18 02:37:56,796 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace
[2022-03-18 02:37:56,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [723668442]
[2022-03-18 02:37:56,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [723668442] provided 1 perfect and 0 imperfect interpolant sequences
[2022-03-18 02:37:56,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-03-18 02:37:56,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2022-03-18 02:37:56,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124367947]
[2022-03-18 02:37:56,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-03-18 02:37:56,797 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2022-03-18 02:37:56,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION
[2022-03-18 02:37:56,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2022-03-18 02:37:56,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56
[2022-03-18 02:37:56,797 INFO L87 Difference]: Start difference. First operand 335 states and 439 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13)
[2022-03-18 02:37:56,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-03-18 02:37:56,874 INFO L93 Difference]: Finished difference Result 341 states and 444 transitions.
[2022-03-18 02:37:56,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states.
[2022-03-18 02:37:56,875 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 105
[2022-03-18 02:37:56,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-03-18 02:37:56,877 INFO L225 Difference]: With dead ends: 341
[2022-03-18 02:37:56,877 INFO L226 Difference]: Without dead ends: 339
[2022-03-18 02:37:56,877 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 200 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90
[2022-03-18 02:37:56,878 INFO L912 BasicCegarLoop]: 34 mSDtfsCounter, 14 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-03-18 02:37:56,878 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 149 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-03-18 02:37:56,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states.
[2022-03-18 02:37:56,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 339.
[2022-03-18 02:37:56,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 216 states have (on average 1.2268518518518519) internal successors, (265), 223 states have internal predecessors, (265), 90 states have call successors, (90), 33 states have call predecessors, (90), 32 states have return successors, (87), 82 states have call predecessors, (87), 87 states have call successors, (87)
[2022-03-18 02:37:56,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 442 transitions.
[2022-03-18 02:37:56,922 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 442 transitions. Word has length 105
[2022-03-18 02:37:56,922 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-03-18 02:37:56,922 INFO L478 AbstractCegarLoop]: Abstraction has 339 states and 442 transitions.
[2022-03-18 02:37:56,922 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13)
[2022-03-18 02:37:56,922 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 442 transitions.
[2022-03-18 02:37:56,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107
[2022-03-18 02:37:56,923 INFO L492 BasicCegarLoop]: Found error trace
[2022-03-18 02:37:56,923 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-03-18 02:37:56,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0
[2022-03-18 02:37:57,143 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-03-18 02:37:57,143 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-03-18 02:37:57,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-03-18 02:37:57,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1026601615, now seen corresponding path program 3 times
[2022-03-18 02:37:57,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION
[2022-03-18 02:37:57,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [361449451]
[2022-03-18 02:37:57,144 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2022-03-18 02:37:57,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1026601615, now seen corresponding path program 4 times
[2022-03-18 02:37:57,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-03-18 02:37:57,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521765757]
[2022-03-18 02:37:57,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-03-18 02:37:57,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-03-18 02:37:57,151 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-03-18 02:37:57,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1883231998]
[2022-03-18 02:37:57,152 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
[2022-03-18 02:37:57,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-03-18 02:37:57,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-03-18 02:37:57,154 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-03-18 02:37:57,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process
[2022-03-18 02:37:57,207 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2022-03-18 02:37:57,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2022-03-18 02:37:57,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 13 conjunts are in the unsatisfiable core
[2022-03-18 02:37:57,210 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-03-18 02:37:57,380 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 24 proven. 215 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked.
[2022-03-18 02:37:57,380 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2022-03-18 02:37:57,533 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 24 proven. 23 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked.
[2022-03-18 02:37:57,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-03-18 02:37:57,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521765757]
[2022-03-18 02:37:57,533 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-03-18 02:37:57,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883231998]
[2022-03-18 02:37:57,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883231998] provided 0 perfect and 2 imperfect interpolant sequences
[2022-03-18 02:37:57,533 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2022-03-18 02:37:57,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8
[2022-03-18 02:37:57,534 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace
[2022-03-18 02:37:57,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [361449451]
[2022-03-18 02:37:57,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [361449451] provided 1 perfect and 0 imperfect interpolant sequences
[2022-03-18 02:37:57,534 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-03-18 02:37:57,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2022-03-18 02:37:57,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028819774]
[2022-03-18 02:37:57,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-03-18 02:37:57,534 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2022-03-18 02:37:57,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION
[2022-03-18 02:37:57,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2022-03-18 02:37:57,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56
[2022-03-18 02:37:57,535 INFO L87 Difference]: Start difference. First operand 339 states and 442 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17)
[2022-03-18 02:37:57,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-03-18 02:37:57,636 INFO L93 Difference]: Finished difference Result 349 states and 452 transitions.
[2022-03-18 02:37:57,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states.
[2022-03-18 02:37:57,637 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) Word has length 106
[2022-03-18 02:37:57,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-03-18 02:37:57,638 INFO L225 Difference]: With dead ends: 349
[2022-03-18 02:37:57,639 INFO L226 Difference]: Without dead ends: 342
[2022-03-18 02:37:57,639 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 204 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110
[2022-03-18 02:37:57,639 INFO L912 BasicCegarLoop]: 54 mSDtfsCounter, 16 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-03-18 02:37:57,640 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 196 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-03-18 02:37:57,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states.
[2022-03-18 02:37:57,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 342.
[2022-03-18 02:37:57,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 219 states have (on average 1.2237442922374429) internal successors, (268), 226 states have internal predecessors, (268), 90 states have call successors, (90), 33 states have call predecessors, (90), 32 states have return successors, (87), 82 states have call predecessors, (87), 87 states have call successors, (87)
[2022-03-18 02:37:57,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 445 transitions.
[2022-03-18 02:37:57,672 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 445 transitions. Word has length 106
[2022-03-18 02:37:57,672 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-03-18 02:37:57,672 INFO L478 AbstractCegarLoop]: Abstraction has 342 states and 445 transitions.
[2022-03-18 02:37:57,672 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17)
[2022-03-18 02:37:57,672 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 445 transitions.
[2022-03-18 02:37:57,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108
[2022-03-18 02:37:57,673 INFO L492 BasicCegarLoop]: Found error trace
[2022-03-18 02:37:57,673 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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]
[2022-03-18 02:37:57,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0
[2022-03-18 02:37:57,889 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24
[2022-03-18 02:37:57,890 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-03-18 02:37:57,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-03-18 02:37:57,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1761848073, now seen corresponding path program 3 times
[2022-03-18 02:37:57,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION
[2022-03-18 02:37:57,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1744210025]
[2022-03-18 02:37:57,890 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2022-03-18 02:37:57,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1761848073, now seen corresponding path program 4 times
[2022-03-18 02:37:57,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-03-18 02:37:57,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383960660]
[2022-03-18 02:37:57,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-03-18 02:37:57,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-03-18 02:37:57,901 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-03-18 02:37:57,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1100247561]
[2022-03-18 02:37:57,902 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
[2022-03-18 02:37:57,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-03-18 02:37:57,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-03-18 02:37:57,903 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-03-18 02:37:57,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process
[2022-03-18 02:37:57,947 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2022-03-18 02:37:57,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2022-03-18 02:37:57,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 38 conjunts are in the unsatisfiable core
[2022-03-18 02:37:57,950 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-03-18 02:37:58,573 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 47 proven. 34 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked.
[2022-03-18 02:37:58,574 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2022-03-18 02:37:58,759 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful
[2022-03-18 02:37:58,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-03-18 02:37:58,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383960660]
[2022-03-18 02:37:58,874 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-03-18 02:37:58,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100247561]
[2022-03-18 02:37:58,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100247561] provided 0 perfect and 1 imperfect interpolant sequences
[2022-03-18 02:37:58,874 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences.
[2022-03-18 02:37:58,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13
[2022-03-18 02:37:58,874 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace
[2022-03-18 02:37:58,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1744210025]
[2022-03-18 02:37:58,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1744210025] provided 1 perfect and 0 imperfect interpolant sequences
[2022-03-18 02:37:58,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-03-18 02:37:58,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13
[2022-03-18 02:37:58,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24007737]
[2022-03-18 02:37:58,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-03-18 02:37:58,875 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states
[2022-03-18 02:37:58,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION
[2022-03-18 02:37:58,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2022-03-18 02:37:58,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272
[2022-03-18 02:37:58,876 INFO L87 Difference]: Start difference. First operand 342 states and 445 transitions. Second operand has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17)
[2022-03-18 02:37:59,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-03-18 02:37:59,468 INFO L93 Difference]: Finished difference Result 369 states and 485 transitions.
[2022-03-18 02:37:59,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states.
[2022-03-18 02:37:59,468 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) Word has length 107
[2022-03-18 02:37:59,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-03-18 02:37:59,470 INFO L225 Difference]: With dead ends: 369
[2022-03-18 02:37:59,470 INFO L226 Difference]: Without dead ends: 366
[2022-03-18 02:37:59,470 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420
[2022-03-18 02:37:59,471 INFO L912 BasicCegarLoop]: 55 mSDtfsCounter, 34 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2022-03-18 02:37:59,472 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 435 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2022-03-18 02:37:59,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states.
[2022-03-18 02:37:59,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 364.
[2022-03-18 02:37:59,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 231 states have (on average 1.2294372294372293) internal successors, (284), 239 states have internal predecessors, (284), 99 states have call successors, (99), 34 states have call predecessors, (99), 33 states have return successors, (96), 90 states have call predecessors, (96), 96 states have call successors, (96)
[2022-03-18 02:37:59,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 479 transitions.
[2022-03-18 02:37:59,528 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 479 transitions. Word has length 107
[2022-03-18 02:37:59,528 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-03-18 02:37:59,528 INFO L478 AbstractCegarLoop]: Abstraction has 364 states and 479 transitions.
[2022-03-18 02:37:59,528 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17)
[2022-03-18 02:37:59,528 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 479 transitions.
[2022-03-18 02:37:59,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111
[2022-03-18 02:37:59,529 INFO L492 BasicCegarLoop]: Found error trace
[2022-03-18 02:37:59,529 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-03-18 02:37:59,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0
[2022-03-18 02:37:59,739 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25
[2022-03-18 02:37:59,740 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-03-18 02:37:59,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-03-18 02:37:59,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1514731471, now seen corresponding path program 5 times
[2022-03-18 02:37:59,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION
[2022-03-18 02:37:59,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1827839015]
[2022-03-18 02:37:59,741 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2022-03-18 02:37:59,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1514731471, now seen corresponding path program 6 times
[2022-03-18 02:37:59,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-03-18 02:37:59,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526259204]
[2022-03-18 02:37:59,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-03-18 02:37:59,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-03-18 02:37:59,746 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-03-18 02:37:59,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [716747948]
[2022-03-18 02:37:59,753 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE
[2022-03-18 02:37:59,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-03-18 02:37:59,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-03-18 02:37:59,754 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-03-18 02:37:59,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process
[2022-03-18 02:37:59,852 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s)
[2022-03-18 02:37:59,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat
[2022-03-18 02:37:59,853 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2022-03-18 02:37:59,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat
[2022-03-18 02:37:59,907 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace
[2022-03-18 02:37:59,907 INFO L130 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found a feasible trace
[2022-03-18 02:37:59,907 INFO L614 BasicCegarLoop]: Counterexample is feasible
[2022-03-18 02:37:59,909 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining)
[2022-03-18 02:37:59,923 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0
[2022-03-18 02:38:00,123 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26
[2022-03-18 02:38:00,126 INFO L718 BasicCegarLoop]: Path program histogram: [6, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2]
[2022-03-18 02:38:00,128 INFO L180 ceAbstractionStarter]: Computing trace abstraction results
[2022-03-18 02:38:00,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 02:38:00 BoogieIcfgContainer
[2022-03-18 02:38:00,142 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2022-03-18 02:38:00,142 INFO L158 Benchmark]: Toolchain (without parser) took 31449.10ms. Allocated memory was 189.8MB in the beginning and 299.9MB in the end (delta: 110.1MB). Free memory was 140.0MB in the beginning and 245.2MB in the end (delta: -105.2MB). Peak memory consumption was 5.7MB. Max. memory is 8.0GB.
[2022-03-18 02:38:00,142 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 189.8MB. Free memory was 156.1MB in the beginning and 155.9MB in the end (delta: 146.8kB). There was no memory consumed. Max. memory is 8.0GB.
[2022-03-18 02:38:00,142 INFO L158 Benchmark]: CACSL2BoogieTranslator took 184.97ms. Allocated memory is still 189.8MB. Free memory was 139.8MB in the beginning and 166.4MB in the end (delta: -26.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB.
[2022-03-18 02:38:00,142 INFO L158 Benchmark]: Boogie Preprocessor took 21.13ms. Allocated memory is still 189.8MB. Free memory was 166.4MB in the beginning and 164.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB.
[2022-03-18 02:38:00,143 INFO L158 Benchmark]: RCFGBuilder took 236.45ms. Allocated memory is still 189.8MB. Free memory was 164.8MB in the beginning and 153.3MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB.
[2022-03-18 02:38:00,143 INFO L158 Benchmark]: TraceAbstraction took 31002.35ms. Allocated memory was 189.8MB in the beginning and 299.9MB in the end (delta: 110.1MB). Free memory was 152.8MB in the beginning and 245.2MB in the end (delta: -92.4MB). Peak memory consumption was 18.7MB. Max. memory is 8.0GB.
[2022-03-18 02:38:00,143 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] #######################
--- Results ---
* Results from de.uni_freiburg.informatik.ultimate.core:
- StatisticsResult: Toolchain Benchmarks
Benchmark results are:
* CDTParser took 0.14ms. Allocated memory is still 189.8MB. Free memory was 156.1MB in the beginning and 155.9MB in the end (delta: 146.8kB). There was no memory consumed. Max. memory is 8.0GB.
* CACSL2BoogieTranslator took 184.97ms. Allocated memory is still 189.8MB. Free memory was 139.8MB in the beginning and 166.4MB in the end (delta: -26.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB.
* Boogie Preprocessor took 21.13ms. Allocated memory is still 189.8MB. Free memory was 166.4MB in the beginning and 164.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB.
* RCFGBuilder took 236.45ms. Allocated memory is still 189.8MB. Free memory was 164.8MB in the beginning and 153.3MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB.
* TraceAbstraction took 31002.35ms. Allocated memory was 189.8MB in the beginning and 299.9MB in the end (delta: 110.1MB). Free memory was 152.8MB in the beginning and 245.2MB in the end (delta: -92.4MB). Peak memory consumption was 18.7MB. Max. memory is 8.0GB.
* Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
- StatisticsResult: ErrorAutomatonStatistics
NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0
- CounterExampleResult [Line: 13]: a call to reach_error is reachable
a call to reach_error is reachable
We found a FailurePath:
[L18] int counter = 0;
[L20] int x, y;
[L21] long long a, b, p, q, r, s, c, k, xy, yy;
[L22] x = __VERIFIER_nondet_int()
[L23] y = __VERIFIER_nondet_int()
[L24] CALL assume_abort_if_not(x >= 1)
[L8] COND FALSE !(!cond)
[L24] RET assume_abort_if_not(x >= 1)
[L25] CALL assume_abort_if_not(y >= 1)
[L8] COND FALSE !(!cond)
[L25] RET assume_abort_if_not(y >= 1)
[L27] a = x
[L28] b = y
[L29] p = 1
[L30] q = 0
[L31] r = 0
[L32] s = 1
[L33] c = 0
[L34] k = 0
[L35] xy = (long long) x * y
[L36] yy = (long long) y * y
[L37] CALL assume_abort_if_not(xy < 2147483647)
[L8] COND FALSE !(!cond)
[L37] RET assume_abort_if_not(xy < 2147483647)
[L38] CALL assume_abort_if_not(yy < 2147483647)
[L8] COND FALSE !(!cond)
[L38] RET assume_abort_if_not(yy < 2147483647)
[L40] EXPR counter++
[L40] COND TRUE counter++<5
[L41] COND FALSE !(!(b != 0))
[L43] c = a
[L44] k = 0
[L46] EXPR counter++
[L46] COND TRUE counter++<5
[L47] CALL __VERIFIER_assert(a == k * b + c)
[L11] COND FALSE !(!(cond))
[L47] RET __VERIFIER_assert(a == k * b + c)
[L48] CALL __VERIFIER_assert(a == y*r + x*p)
[L11] COND FALSE !(!(cond))
[L48] RET __VERIFIER_assert(a == y*r + x*p)
[L49] CALL __VERIFIER_assert(b == x * q + y * s)
[L11] COND FALSE !(!(cond))
[L49] RET __VERIFIER_assert(b == x * q + y * s)
[L50] CALL __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0)
[L11] COND FALSE !(!(cond))
[L50] RET __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0)
[L51] COND TRUE !(c >= b)
[L57] a = b
[L58] b = c
[L60] long long temp;
[L61] temp = p
[L62] p = q
[L63] q = temp - q * k
[L64] temp = r
[L65] r = s
[L66] s = temp - s * k
[L40] EXPR counter++
[L40] COND TRUE counter++<5
[L41] COND FALSE !(!(b != 0))
[L43] c = a
[L44] k = 0
[L46] EXPR counter++
[L46] COND TRUE counter++<5
[L47] CALL __VERIFIER_assert(a == k * b + c)
[L11] COND FALSE !(!(cond))
[L47] RET __VERIFIER_assert(a == k * b + c)
[L48] CALL __VERIFIER_assert(a == y*r + x*p)
[L11] COND FALSE !(!(cond))
[L48] RET __VERIFIER_assert(a == y*r + x*p)
[L49] CALL __VERIFIER_assert(b == x * q + y * s)
[L11] COND FALSE !(!(cond))
[L49] RET __VERIFIER_assert(b == x * q + y * s)
[L50] CALL __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0)
[L11] COND FALSE !(!(cond))
[L50] RET __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0)
[L51] COND FALSE !(!(c >= b))
[L53] c = c - b
[L54] k = k + 1
[L46] EXPR counter++
[L46] COND TRUE counter++<5
[L47] CALL __VERIFIER_assert(a == k * b + c)
[L11] COND FALSE !(!(cond))
[L47] RET __VERIFIER_assert(a == k * b + c)
[L48] CALL __VERIFIER_assert(a == y*r + x*p)
[L11] COND FALSE !(!(cond))
[L48] RET __VERIFIER_assert(a == y*r + x*p)
[L49] CALL __VERIFIER_assert(b == x * q + y * s)
[L11] COND FALSE !(!(cond))
[L49] RET __VERIFIER_assert(b == x * q + y * s)
[L50] CALL __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0)
[L11] COND FALSE !(!(cond))
[L50] RET __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0)
[L51] COND TRUE !(c >= b)
[L57] a = b
[L58] b = c
[L60] long long temp;
[L61] temp = p
[L62] p = q
[L63] q = temp - q * k
[L64] temp = r
[L65] r = s
[L66] s = temp - s * k
[L40] EXPR counter++
[L40] COND FALSE !(counter++<5)
[L70] CALL __VERIFIER_assert(q*x + s*y == 0)
[L11] COND TRUE !(cond)
[L13] reach_error()
- StatisticsResult: Ultimate Automizer benchmark data
CFG has 6 procedures, 42 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 30.9s, OverallIterations: 27, TraceHistogramMax: 13, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 6.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 705 SdHoareTripleChecker+Valid, 3.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 602 mSDsluCounter, 5888 SdHoareTripleChecker+Invalid, 3.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 4641 mSDsCounter, 494 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3338 IncrementalHoareTripleChecker+Invalid, 3832 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 494 mSolverCounterUnsat, 1247 mSDtfsCounter, 3338 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3065 GetRequests, 2777 SyntacticMatches, 26 SemanticMatches, 262 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 8.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=364occurred in iteration=26, InterpolantAutomatonStates: 212, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 26 MinimizatonAttempts, 120 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available
RESULT: Ultimate proved your program to be incorrect!
[2022-03-18 02:38:00,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0
Received shutdown request...