/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/nested3-2.c
--------------------------------------------------------------------------------
This is Ultimate 0.2.2-dev-6c470ae
[2022-02-15 02:05:00,989 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2022-02-15 02:05:01,016 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
[2022-02-15 02:05:01,060 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2022-02-15 02:05:01,060 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2022-02-15 02:05:01,063 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2022-02-15 02:05:01,066 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2022-02-15 02:05:01,068 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values
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[2022-02-15 02:05:01,075 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values
[2022-02-15 02:05:01,076 INFO L181 SettingsManager]: Resetting Sifa preferences to default values
[2022-02-15 02:05:01,077 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2022-02-15 02:05:01,077 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values
[2022-02-15 02:05:01,079 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values
[2022-02-15 02:05:01,080 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2022-02-15 02:05:01,083 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values
[2022-02-15 02:05:01,083 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2022-02-15 02:05:01,084 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2022-02-15 02:05:01,086 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2022-02-15 02:05:01,091 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values
[2022-02-15 02:05:01,092 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2022-02-15 02:05:01,093 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values
[2022-02-15 02:05:01,094 INFO L181 SettingsManager]: Resetting Referee preferences to default values
[2022-02-15 02:05:01,095 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values
[2022-02-15 02:05:01,101 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
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[2022-02-15 02:05:01,102 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values
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[2022-02-15 02:05:01,110 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values
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[2022-02-15 02:05:01,111 INFO L188 SettingsManager]: Finished resetting all preferences to default values...
[2022-02-15 02:05:01,112 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf
[2022-02-15 02:05:01,124 INFO L113 SettingsManager]: Loading preferences was successful
[2022-02-15 02:05:01,124 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2022-02-15 02:05:01,126 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2022-02-15 02:05:01,126 INFO L138 SettingsManager]: * sizeof long=4
[2022-02-15 02:05:01,126 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2022-02-15 02:05:01,126 INFO L138 SettingsManager]: * sizeof POINTER=4
[2022-02-15 02:05:01,126 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2022-02-15 02:05:01,126 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2022-02-15 02:05:01,127 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2022-02-15 02:05:01,127 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2022-02-15 02:05:01,128 INFO L138 SettingsManager]: * sizeof long double=12
[2022-02-15 02:05:01,128 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2022-02-15 02:05:01,128 INFO L138 SettingsManager]: * Use constant arrays=true
[2022-02-15 02:05:01,128 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2022-02-15 02:05:01,128 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2022-02-15 02:05:01,129 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements
[2022-02-15 02:05:01,129 INFO L138 SettingsManager]: * To the following directory=./dump/
[2022-02-15 02:05:01,129 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2022-02-15 02:05:01,129 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-02-15 02:05:01,129 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2022-02-15 02:05:01,129 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation
[2022-02-15 02:05:01,130 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2022-02-15 02:05:01,130 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN
[2022-02-15 02:05:01,130 INFO L138 SettingsManager]: * Use separate solver for trace checks=false
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int)
WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN;
[2022-02-15 02:05:01,378 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp
[2022-02-15 02:05:01,407 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2022-02-15 02:05:01,410 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2022-02-15 02:05:01,410 INFO L271 PluginConnector]: Initializing CDTParser...
[2022-02-15 02:05:01,411 INFO L275 PluginConnector]: CDTParser initialized
[2022-02-15 02:05:01,412 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/nested3-2.c
[2022-02-15 02:05:01,471 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cbc16f1fc/ac7935d087004e52adbe7aa92fb27786/FLAGe30b57dd9
[2022-02-15 02:05:01,834 INFO L306 CDTParser]: Found 1 translation units.
[2022-02-15 02:05:01,834 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested3-2.c
[2022-02-15 02:05:01,842 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cbc16f1fc/ac7935d087004e52adbe7aa92fb27786/FLAGe30b57dd9
[2022-02-15 02:05:02,254 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cbc16f1fc/ac7935d087004e52adbe7aa92fb27786
[2022-02-15 02:05:02,256 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2022-02-15 02:05:02,257 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements.
[2022-02-15 02:05:02,260 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2022-02-15 02:05:02,260 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2022-02-15 02:05:02,263 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2022-02-15 02:05:02,263 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 02:05:02" (1/1) ...
[2022-02-15 02:05:02,264 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d80dfdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:05:02, skipping insertion in model container
[2022-02-15 02:05:02,265 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 02:05:02" (1/1) ...
[2022-02-15 02:05:02,271 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2022-02-15 02:05:02,282 INFO L178 MainTranslator]: Built tables and reachable declarations
[2022-02-15 02:05:02,432 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested3-2.c[321,334]
[2022-02-15 02:05:02,443 INFO L210 PostProcessor]: Analyzing one entry point: main
[2022-02-15 02:05:02,449 INFO L203 MainTranslator]: Completed pre-run
[2022-02-15 02:05:02,456 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested3-2.c[321,334]
[2022-02-15 02:05:02,460 INFO L210 PostProcessor]: Analyzing one entry point: main
[2022-02-15 02:05:02,469 INFO L208 MainTranslator]: Completed translation
[2022-02-15 02:05:02,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:05:02 WrapperNode
[2022-02-15 02:05:02,470 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2022-02-15 02:05:02,471 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2022-02-15 02:05:02,471 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2022-02-15 02:05:02,471 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2022-02-15 02:05:02,480 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:05:02" (1/1) ...
[2022-02-15 02:05:02,481 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:05:02" (1/1) ...
[2022-02-15 02:05:02,485 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:05:02" (1/1) ...
[2022-02-15 02:05:02,485 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:05:02" (1/1) ...
[2022-02-15 02:05:02,489 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:05:02" (1/1) ...
[2022-02-15 02:05:02,492 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:05:02" (1/1) ...
[2022-02-15 02:05:02,493 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:05:02" (1/1) ...
[2022-02-15 02:05:02,494 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2022-02-15 02:05:02,495 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2022-02-15 02:05:02,495 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2022-02-15 02:05:02,495 INFO L275 PluginConnector]: RCFGBuilder initialized
[2022-02-15 02:05:02,496 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:05:02" (1/1) ...
[2022-02-15 02:05:02,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-02-15 02:05:02,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-15 02:05:02,528 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2022-02-15 02:05:02,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2022-02-15 02:05:02,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2022-02-15 02:05:02,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2022-02-15 02:05:02,570 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error
[2022-02-15 02:05:02,570 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2022-02-15 02:05:02,570 INFO L138 BoogieDeclarations]: Found implementation of procedure main
[2022-02-15 02:05:02,571 INFO L130 BoogieDeclarations]: Found specification of procedure abort
[2022-02-15 02:05:02,571 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail
[2022-02-15 02:05:02,571 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error
[2022-02-15 02:05:02,571 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2022-02-15 02:05:02,572 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2022-02-15 02:05:02,572 INFO L130 BoogieDeclarations]: Found specification of procedure main
[2022-02-15 02:05:02,572 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2022-02-15 02:05:02,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int
[2022-02-15 02:05:02,572 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2022-02-15 02:05:02,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~int
[2022-02-15 02:05:02,575 INFO L130 BoogieDeclarations]: Found specification of procedure read~int
[2022-02-15 02:05:02,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2022-02-15 02:05:02,630 INFO L234 CfgBuilder]: Building ICFG
[2022-02-15 02:05:02,631 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation
[2022-02-15 02:05:02,714 INFO L275 CfgBuilder]: Performing block encoding
[2022-02-15 02:05:02,719 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2022-02-15 02:05:02,719 INFO L299 CfgBuilder]: Removed 3 assume(true) statements.
[2022-02-15 02:05:02,721 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 02:05:02 BoogieIcfgContainer
[2022-02-15 02:05:02,721 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2022-02-15 02:05:02,722 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2022-02-15 02:05:02,722 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2022-02-15 02:05:02,725 INFO L275 PluginConnector]: TraceAbstraction initialized
[2022-02-15 02:05:02,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 02:05:02" (1/3) ...
[2022-02-15 02:05:02,726 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@368b0c5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 02:05:02, skipping insertion in model container
[2022-02-15 02:05:02,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:05:02" (2/3) ...
[2022-02-15 02:05:02,726 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@368b0c5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 02:05:02, skipping insertion in model container
[2022-02-15 02:05:02,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 02:05:02" (3/3) ...
[2022-02-15 02:05:02,727 INFO L111 eAbstractionObserver]: Analyzing ICFG nested3-2.c
[2022-02-15 02:05:02,731 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION
[2022-02-15 02:05:02,732 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2022-02-15 02:05:02,781 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2022-02-15 02:05:02,787 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=JORDAN
[2022-02-15 02:05:02,787 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2022-02-15 02:05:02,814 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5)
[2022-02-15 02:05:02,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12
[2022-02-15 02:05:02,820 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:05:02,821 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 02:05:02,821 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:05:02,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:05:02,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1794590667, now seen corresponding path program 1 times
[2022-02-15 02:05:02,849 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:05:02,850 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1491706729]
[2022-02-15 02:05:02,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:05:02,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:05:02,918 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2022-02-15 02:05:02,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:03,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:05:03,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:03,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:05:03,056 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:05:03,057 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1491706729]
[2022-02-15 02:05:03,059 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1491706729] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:05:03,060 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:05:03,060 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2022-02-15 02:05:03,061 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933060862]
[2022-02-15 02:05:03,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:05:03,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-02-15 02:05:03,066 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:05:03,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-02-15 02:05:03,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-02-15 02:05:03,096 INFO L87 Difference]: Start difference. First operand has 25 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2022-02-15 02:05:03,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:05:03,172 INFO L93 Difference]: Finished difference Result 44 states and 63 transitions.
[2022-02-15 02:05:03,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2022-02-15 02:05:03,175 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11
[2022-02-15 02:05:03,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:05:03,181 INFO L225 Difference]: With dead ends: 44
[2022-02-15 02:05:03,181 INFO L226 Difference]: Without dead ends: 20
[2022-02-15 02:05:03,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-02-15 02:05:03,190 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 16 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-02-15 02:05:03,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 29 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-02-15 02:05:03,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states.
[2022-02-15 02:05:03,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20.
[2022-02-15 02:05:03,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3)
[2022-02-15 02:05:03,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions.
[2022-02-15 02:05:03,238 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 11
[2022-02-15 02:05:03,239 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:05:03,239 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions.
[2022-02-15 02:05:03,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2022-02-15 02:05:03,241 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions.
[2022-02-15 02:05:03,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12
[2022-02-15 02:05:03,242 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:05:03,242 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 02:05:03,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2022-02-15 02:05:03,245 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:05:03,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:05:03,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1824143339, now seen corresponding path program 1 times
[2022-02-15 02:05:03,247 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:05:03,247 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1484572093]
[2022-02-15 02:05:03,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:05:03,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:05:03,252 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2022-02-15 02:05:03,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:03,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:05:03,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:03,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:05:03,374 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:05:03,374 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1484572093]
[2022-02-15 02:05:03,375 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1484572093] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:05:03,375 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:05:03,375 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2022-02-15 02:05:03,375 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26895975]
[2022-02-15 02:05:03,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:05:03,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2022-02-15 02:05:03,376 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:05:03,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2022-02-15 02:05:03,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2022-02-15 02:05:03,377 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2022-02-15 02:05:03,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:05:03,459 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions.
[2022-02-15 02:05:03,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states.
[2022-02-15 02:05:03,460 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11
[2022-02-15 02:05:03,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:05:03,462 INFO L225 Difference]: With dead ends: 34
[2022-02-15 02:05:03,462 INFO L226 Difference]: Without dead ends: 27
[2022-02-15 02:05:03,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2022-02-15 02:05:03,467 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 26 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 27 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
[2022-02-15 02:05:03,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 27 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-02-15 02:05:03,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states.
[2022-02-15 02:05:03,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 21.
[2022-02-15 02:05:03,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3)
[2022-02-15 02:05:03,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions.
[2022-02-15 02:05:03,481 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 11
[2022-02-15 02:05:03,481 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:05:03,481 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions.
[2022-02-15 02:05:03,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2022-02-15 02:05:03,482 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions.
[2022-02-15 02:05:03,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13
[2022-02-15 02:05:03,482 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:05:03,482 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 02:05:03,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2022-02-15 02:05:03,483 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:05:03,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:05:03,484 INFO L85 PathProgramCache]: Analyzing trace with hash -699512288, now seen corresponding path program 1 times
[2022-02-15 02:05:03,484 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:05:03,484 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1862890307]
[2022-02-15 02:05:03,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:05:03,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:05:03,486 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2022-02-15 02:05:03,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:03,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:05:03,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:03,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:05:03,567 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:05:03,567 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1862890307]
[2022-02-15 02:05:03,567 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1862890307] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:05:03,567 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:05:03,567 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2022-02-15 02:05:03,568 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562018871]
[2022-02-15 02:05:03,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:05:03,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2022-02-15 02:05:03,568 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:05:03,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2022-02-15 02:05:03,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2022-02-15 02:05:03,569 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2022-02-15 02:05:03,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:05:03,640 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions.
[2022-02-15 02:05:03,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states.
[2022-02-15 02:05:03,640 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12
[2022-02-15 02:05:03,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:05:03,643 INFO L225 Difference]: With dead ends: 39
[2022-02-15 02:05:03,643 INFO L226 Difference]: Without dead ends: 25
[2022-02-15 02:05:03,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2022-02-15 02:05:03,646 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 21 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-02-15 02:05:03,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 27 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-02-15 02:05:03,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states.
[2022-02-15 02:05:03,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22.
[2022-02-15 02:05:03,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3)
[2022-02-15 02:05:03,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions.
[2022-02-15 02:05:03,654 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 12
[2022-02-15 02:05:03,654 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:05:03,654 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions.
[2022-02-15 02:05:03,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2022-02-15 02:05:03,655 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions.
[2022-02-15 02:05:03,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14
[2022-02-15 02:05:03,655 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:05:03,655 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 02:05:03,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2022-02-15 02:05:03,656 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:05:03,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:05:03,656 INFO L85 PathProgramCache]: Analyzing trace with hash -185588926, now seen corresponding path program 1 times
[2022-02-15 02:05:03,656 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:05:03,657 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [670607503]
[2022-02-15 02:05:03,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:05:03,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:05:03,658 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2022-02-15 02:05:03,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:03,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-15 02:05:03,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-15 02:05:03,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-15 02:05:03,745 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-15 02:05:03,745 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [670607503]
[2022-02-15 02:05:03,745 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [670607503] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-15 02:05:03,745 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-15 02:05:03,745 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2022-02-15 02:05:03,745 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760939775]
[2022-02-15 02:05:03,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-15 02:05:03,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2022-02-15 02:05:03,746 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-15 02:05:03,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2022-02-15 02:05:03,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2022-02-15 02:05:03,747 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2022-02-15 02:05:03,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-15 02:05:03,822 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions.
[2022-02-15 02:05:03,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states.
[2022-02-15 02:05:03,823 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13
[2022-02-15 02:05:03,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-15 02:05:03,823 INFO L225 Difference]: With dead ends: 39
[2022-02-15 02:05:03,823 INFO L226 Difference]: Without dead ends: 24
[2022-02-15 02:05:03,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2022-02-15 02:05:03,825 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-02-15 02:05:03,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 28 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-02-15 02:05:03,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states.
[2022-02-15 02:05:03,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23.
[2022-02-15 02:05:03,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3)
[2022-02-15 02:05:03,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions.
[2022-02-15 02:05:03,830 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 13
[2022-02-15 02:05:03,830 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-02-15 02:05:03,830 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions.
[2022-02-15 02:05:03,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2022-02-15 02:05:03,830 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions.
[2022-02-15 02:05:03,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15
[2022-02-15 02:05:03,831 INFO L506 BasicCegarLoop]: Found error trace
[2022-02-15 02:05:03,831 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-15 02:05:03,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2022-02-15 02:05:03,831 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-15 02:05:03,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-02-15 02:05:03,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1431986846, now seen corresponding path program 1 times
[2022-02-15 02:05:03,832 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-15 02:05:03,832 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1948188960]
[2022-02-15 02:05:03,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-15 02:05:03,946 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult
[2022-02-15 02:05:03,947 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE
[2022-02-15 02:05:03,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-15 02:05:03,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat
[2022-02-15 02:05:03,980 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2022-02-15 02:05:03,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat
[2022-02-15 02:05:04,009 INFO L138 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace
[2022-02-15 02:05:04,009 INFO L628 BasicCegarLoop]: Counterexample is feasible
[2022-02-15 02:05:04,011 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining)
[2022-02-15 02:05:04,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2022-02-15 02:05:04,014 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1]
[2022-02-15 02:05:04,017 INFO L180 ceAbstractionStarter]: Computing trace abstraction results
[2022-02-15 02:05:04,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.02 02:05:04 BoogieIcfgContainer
[2022-02-15 02:05:04,029 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2022-02-15 02:05:04,029 INFO L158 Benchmark]: Toolchain (without parser) took 1772.63ms. Allocated memory was 190.8MB in the beginning and 268.4MB in the end (delta: 77.6MB). Free memory was 137.6MB in the beginning and 226.1MB in the end (delta: -88.5MB). There was no memory consumed. Max. memory is 8.0GB.
[2022-02-15 02:05:04,030 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 190.8MB. Free memory is still 153.6MB. There was no memory consumed. Max. memory is 8.0GB.
[2022-02-15 02:05:04,030 INFO L158 Benchmark]: CACSL2BoogieTranslator took 210.02ms. Allocated memory was 190.8MB in the beginning and 268.4MB in the end (delta: 77.6MB). Free memory was 137.4MB in the beginning and 240.6MB in the end (delta: -103.2MB). Peak memory consumption was 9.9MB. Max. memory is 8.0GB.
[2022-02-15 02:05:04,030 INFO L158 Benchmark]: Boogie Preprocessor took 23.85ms. Allocated memory is still 268.4MB. Free memory was 240.6MB in the beginning and 239.2MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB.
[2022-02-15 02:05:04,031 INFO L158 Benchmark]: RCFGBuilder took 225.65ms. Allocated memory is still 268.4MB. Free memory was 239.2MB in the beginning and 228.7MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB.
[2022-02-15 02:05:04,033 INFO L158 Benchmark]: TraceAbstraction took 1306.69ms. Allocated memory is still 268.4MB. Free memory was 228.1MB in the beginning and 226.1MB in the end (delta: 2.0MB). Peak memory consumption was 2.4MB. Max. memory is 8.0GB.
[2022-02-15 02:05:04,035 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] #######################
--- Results ---
* Results from de.uni_freiburg.informatik.ultimate.core:
- StatisticsResult: Toolchain Benchmarks
Benchmark results are:
* CDTParser took 0.11ms. Allocated memory is still 190.8MB. Free memory is still 153.6MB. There was no memory consumed. Max. memory is 8.0GB.
* CACSL2BoogieTranslator took 210.02ms. Allocated memory was 190.8MB in the beginning and 268.4MB in the end (delta: 77.6MB). Free memory was 137.4MB in the beginning and 240.6MB in the end (delta: -103.2MB). Peak memory consumption was 9.9MB. Max. memory is 8.0GB.
* Boogie Preprocessor took 23.85ms. Allocated memory is still 268.4MB. Free memory was 240.6MB in the beginning and 239.2MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB.
* RCFGBuilder took 225.65ms. Allocated memory is still 268.4MB. Free memory was 239.2MB in the beginning and 228.7MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB.
* TraceAbstraction took 1306.69ms. Allocated memory is still 268.4MB. Free memory was 228.1MB in the beginning and 226.1MB in the end (delta: 2.0MB). Peak memory consumption was 2.4MB. 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: 7]: a call to reach_error is reachable
a call to reach_error is reachable
We found a FailurePath:
[L14] unsigned int x = 0;
[L15] unsigned int y = 0;
[L16] unsigned int z = 0;
[L17] unsigned int w = 0;
[L19] COND TRUE x < 0x0fffffff
[L20] y = 0
[L22] COND TRUE y < 0x0fffffff
[L23] z =0
[L24] COND TRUE z <0x0fffffff
[L25] z++
[L24] COND FALSE !(z <0x0fffffff)
[L27] CALL __VERIFIER_assert(!(z % 4))
[L6] COND TRUE !(cond)
[L7] reach_error()
- StatisticsResult: Ultimate Automizer benchmark data
CFG has 5 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.2s, OverallIterations: 5, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 89 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 80 mSDsluCounter, 111 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 24 mSDsCounter, 30 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 74 IncrementalHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 30 mSolverCounterUnsat, 87 mSDtfsCounter, 74 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=0, InterpolantAutomatonStates: 15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 4 MinimizatonAttempts, 10 StatesRemovedByMinimization, 3 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!
[2022-02-15 02:05:04,058 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0
Received shutdown request...