/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/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_BITWISE.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_7-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 12:33:05,158 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 12:33:05,161 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 12:33:05,209 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 12:33:05,218 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 12:33:05,219 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 12:33:05,220 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 12:33:05,221 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 12:33:05,222 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 12:33:05,223 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 12:33:05,224 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 12:33:05,225 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 12:33:05,227 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 12:33:05,228 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 12:33:05,229 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 12:33:05,229 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 12:33:05,232 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 12:33:05,238 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 12:33:05,239 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 12:33:05,240 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 12:33:05,250 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_BITWISE.epf [2022-01-10 12:33:05,269 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 12:33:05,269 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 12:33:05,270 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 12:33:05,270 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 12:33:05,271 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 12:33:05,271 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 12:33:05,271 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 12:33:05,271 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 12:33:05,272 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 12:33:05,272 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 12:33:05,272 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 12:33:05,272 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 12:33:05,272 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 12:33:05,273 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 12:33:05,273 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 12:33:05,273 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 12:33:05,273 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 12:33:05,273 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 12:33:05,273 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 12:33:05,274 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 12:33:05,274 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 12:33:05,274 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 12:33:05,274 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 12:33:05,274 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 12:33:05,275 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 12:33:05,275 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 12:33:05,277 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 12:33:05,277 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 12:33:05,278 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 12:33:05,278 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 12:33:05,278 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 12:33:05,278 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 12:33:05,280 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 12:33:05,280 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_BITWISE 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 12:33:05,508 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 12:33:05,524 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 12:33:05,526 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 12:33:05,527 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 12:33:05,529 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 12:33:05,530 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_7-2.c [2022-01-10 12:33:05,587 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a8a12b29/3062a528fae648da8857bf616ce2dd6a/FLAG4c0f739de [2022-01-10 12:33:05,912 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 12:33:05,913 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_7-2.c [2022-01-10 12:33:05,920 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a8a12b29/3062a528fae648da8857bf616ce2dd6a/FLAG4c0f739de [2022-01-10 12:33:06,354 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a8a12b29/3062a528fae648da8857bf616ce2dd6a [2022-01-10 12:33:06,358 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 12:33:06,360 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 12:33:06,362 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 12:33:06,362 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 12:33:06,364 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 12:33:06,365 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 12:33:06" (1/1) ... [2022-01-10 12:33:06,365 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b647be7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:33:06, skipping insertion in model container [2022-01-10 12:33:06,366 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 12:33:06" (1/1) ... [2022-01-10 12:33:06,373 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 12:33:06,381 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 12:33:06,560 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_7-2.c[741,754] [2022-01-10 12:33:06,563 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 12:33:06,575 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 12:33:06,610 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_7-2.c[741,754] [2022-01-10 12:33:06,613 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 12:33:06,626 INFO L208 MainTranslator]: Completed translation [2022-01-10 12:33:06,627 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:33:06 WrapperNode [2022-01-10 12:33:06,627 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 12:33:06,629 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 12:33:06,629 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 12:33:06,629 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 12:33:06,635 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:33:06" (1/1) ... [2022-01-10 12:33:06,643 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:33:06" (1/1) ... [2022-01-10 12:33:06,656 INFO L137 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2022-01-10 12:33:06,657 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 12:33:06,658 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 12:33:06,658 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 12:33:06,658 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 12:33:06,664 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:33:06" (1/1) ... [2022-01-10 12:33:06,664 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:33:06" (1/1) ... [2022-01-10 12:33:06,668 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:33:06" (1/1) ... [2022-01-10 12:33:06,668 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:33:06" (1/1) ... [2022-01-10 12:33:06,672 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:33:06" (1/1) ... [2022-01-10 12:33:06,675 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:33:06" (1/1) ... [2022-01-10 12:33:06,679 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:33:06" (1/1) ... [2022-01-10 12:33:06,681 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 12:33:06,682 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 12:33:06,682 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 12:33:06,683 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 12:33:06,684 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:33:06" (1/1) ... [2022-01-10 12:33:06,690 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 12:33:06,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:33:06,712 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) [2022-01-10 12:33:06,737 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 [2022-01-10 12:33:06,757 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 12:33:06,757 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 12:33:06,757 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 12:33:06,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 12:33:06,757 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2022-01-10 12:33:06,758 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2022-01-10 12:33:06,813 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 12:33:06,814 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 12:33:06,924 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 12:33:06,929 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 12:33:06,929 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-10 12:33:06,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 12:33:06 BoogieIcfgContainer [2022-01-10 12:33:06,931 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 12:33:06,932 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 12:33:06,932 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 12:33:06,936 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 12:33:06,939 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 12:33:06" (1/1) ... [2022-01-10 12:33:06,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 12:33:06 BasicIcfg [2022-01-10 12:33:06,988 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 12:33:06,989 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 12:33:06,989 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 12:33:06,992 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 12:33:06,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 12:33:06" (1/4) ... [2022-01-10 12:33:06,993 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ea7561a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 12:33:06, skipping insertion in model container [2022-01-10 12:33:06,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:33:06" (2/4) ... [2022-01-10 12:33:06,993 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ea7561a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 12:33:06, skipping insertion in model container [2022-01-10 12:33:06,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 12:33:06" (3/4) ... [2022-01-10 12:33:06,994 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ea7561a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 12:33:06, skipping insertion in model container [2022-01-10 12:33:06,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 12:33:06" (4/4) ... [2022-01-10 12:33:06,995 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_7-2.cTransformedIcfg [2022-01-10 12:33:06,999 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 12:33:06,999 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 12:33:07,052 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 12:33:07,070 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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=FAST_UPR [2022-01-10 12:33:07,070 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 12:33:07,102 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 12:33:07,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-10 12:33:07,106 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:33:07,107 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:33:07,107 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:33:07,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:33:07,112 INFO L85 PathProgramCache]: Analyzing trace with hash 2142902620, now seen corresponding path program 1 times [2022-01-10 12:33:07,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:33:07,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592061424] [2022-01-10 12:33:07,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:33:07,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:33:07,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:07,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:33:07,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:07,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 12:33:07,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:33:07,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592061424] [2022-01-10 12:33:07,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592061424] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 12:33:07,397 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 12:33:07,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 12:33:07,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214330927] [2022-01-10 12:33:07,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 12:33:07,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 12:33:07,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:33:07,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 12:33:07,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 12:33:07,433 INFO L87 Difference]: Start difference. First operand has 19 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 12:33:07,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:33:07,480 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2022-01-10 12:33:07,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 12:33:07,482 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2022-01-10 12:33:07,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:33:07,489 INFO L225 Difference]: With dead ends: 33 [2022-01-10 12:33:07,489 INFO L226 Difference]: Without dead ends: 17 [2022-01-10 12:33:07,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 12:33:07,497 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 4 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 12:33:07,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 74 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 12:33:07,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-01-10 12:33:07,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-01-10 12:33:07,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 12 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-10 12:33:07,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-01-10 12:33:07,541 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 10 [2022-01-10 12:33:07,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:33:07,542 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-01-10 12:33:07,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 12:33:07,543 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-01-10 12:33:07,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-10 12:33:07,546 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:33:07,546 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:33:07,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 12:33:07,547 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:33:07,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:33:07,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1380246405, now seen corresponding path program 1 times [2022-01-10 12:33:07,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:33:07,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249013780] [2022-01-10 12:33:07,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:33:07,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:33:07,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:07,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:33:07,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:07,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 12:33:07,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:33:07,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249013780] [2022-01-10 12:33:07,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249013780] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 12:33:07,655 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 12:33:07,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 12:33:07,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745178024] [2022-01-10 12:33:07,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 12:33:07,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 12:33:07,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:33:07,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 12:33:07,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 12:33:07,658 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 12:33:07,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:33:07,726 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2022-01-10 12:33:07,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 12:33:07,727 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-01-10 12:33:07,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:33:07,729 INFO L225 Difference]: With dead ends: 23 [2022-01-10 12:33:07,729 INFO L226 Difference]: Without dead ends: 19 [2022-01-10 12:33:07,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 12:33:07,735 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 8 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 30 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 [2022-01-10 12:33:07,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 30 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 12:33:07,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-01-10 12:33:07,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2022-01-10 12:33:07,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 12 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-10 12:33:07,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-01-10 12:33:07,746 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 11 [2022-01-10 12:33:07,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:33:07,749 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-01-10 12:33:07,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 12:33:07,754 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-01-10 12:33:07,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-10 12:33:07,755 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:33:07,755 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:33:07,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 12:33:07,755 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:33:07,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:33:07,756 INFO L85 PathProgramCache]: Analyzing trace with hash -794894887, now seen corresponding path program 1 times [2022-01-10 12:33:07,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:33:07,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485646847] [2022-01-10 12:33:07,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:33:07,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:33:07,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:07,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:33:07,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:07,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:33:07,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:07,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 12:33:08,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:08,006 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 12:33:08,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:33:08,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485646847] [2022-01-10 12:33:08,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485646847] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:33:08,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117427670] [2022-01-10 12:33:08,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:33:08,007 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:33:08,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:33:08,008 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) [2022-01-10 12:33:08,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-10 12:33:08,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:08,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 12:33:08,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 12:33:08,211 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 12:33:08,212 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 12:33:08,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117427670] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 12:33:08,214 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 12:33:08,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-01-10 12:33:08,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107054479] [2022-01-10 12:33:08,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 12:33:08,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 12:33:08,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:33:08,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 12:33:08,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-01-10 12:33:08,219 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-10 12:33:08,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:33:08,256 INFO L93 Difference]: Finished difference Result 28 states and 38 transitions. [2022-01-10 12:33:08,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 12:33:08,257 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-01-10 12:33:08,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:33:08,258 INFO L225 Difference]: With dead ends: 28 [2022-01-10 12:33:08,258 INFO L226 Difference]: Without dead ends: 24 [2022-01-10 12:33:08,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-01-10 12:33:08,262 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 12:33:08,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 93 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 12:33:08,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-01-10 12:33:08,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2022-01-10 12:33:08,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-01-10 12:33:08,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 29 transitions. [2022-01-10 12:33:08,269 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 29 transitions. Word has length 22 [2022-01-10 12:33:08,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:33:08,269 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 29 transitions. [2022-01-10 12:33:08,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-10 12:33:08,269 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 29 transitions. [2022-01-10 12:33:08,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-10 12:33:08,271 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:33:08,271 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:33:08,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-10 12:33:08,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:33:08,495 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:33:08,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:33:08,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1731891524, now seen corresponding path program 1 times [2022-01-10 12:33:08,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:33:08,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729351331] [2022-01-10 12:33:08,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:33:08,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:33:08,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:08,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:33:08,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:08,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:33:08,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:08,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 12:33:08,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:08,657 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 12:33:08,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:33:08,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729351331] [2022-01-10 12:33:08,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729351331] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:33:08,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196366993] [2022-01-10 12:33:08,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:33:08,658 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:33:08,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:33:08,659 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) [2022-01-10 12:33:08,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-10 12:33:08,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:08,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 12:33:08,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 12:33:08,955 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 12:33:08,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 12:33:09,408 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 12:33:09,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196366993] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 12:33:09,409 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 12:33:09,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 12 [2022-01-10 12:33:09,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86456322] [2022-01-10 12:33:09,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 12:33:09,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 12:33:09,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:33:09,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 12:33:09,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-01-10 12:33:09,411 INFO L87 Difference]: Start difference. First operand 21 states and 29 transitions. Second operand has 12 states, 10 states have (on average 2.8) internal successors, (28), 12 states have internal predecessors, (28), 5 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2022-01-10 12:33:09,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:33:09,623 INFO L93 Difference]: Finished difference Result 46 states and 77 transitions. [2022-01-10 12:33:09,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 12:33:09,624 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.8) internal successors, (28), 12 states have internal predecessors, (28), 5 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 23 [2022-01-10 12:33:09,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:33:09,625 INFO L225 Difference]: With dead ends: 46 [2022-01-10 12:33:09,625 INFO L226 Difference]: Without dead ends: 28 [2022-01-10 12:33:09,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-01-10 12:33:09,627 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 23 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 12:33:09,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 63 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 12:33:09,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-10 12:33:09,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-01-10 12:33:09,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 states have internal predecessors, (19), 5 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (20), 8 states have call predecessors, (20), 5 states have call successors, (20) [2022-01-10 12:33:09,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 44 transitions. [2022-01-10 12:33:09,635 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 44 transitions. Word has length 23 [2022-01-10 12:33:09,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:33:09,635 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 44 transitions. [2022-01-10 12:33:09,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.8) internal successors, (28), 12 states have internal predecessors, (28), 5 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2022-01-10 12:33:09,635 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 44 transitions. [2022-01-10 12:33:09,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-10 12:33:09,637 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:33:09,637 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:33:09,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-10 12:33:09,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-10 12:33:09,838 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:33:09,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:33:09,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1995795547, now seen corresponding path program 2 times [2022-01-10 12:33:09,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:33:09,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381532974] [2022-01-10 12:33:09,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:33:09,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:33:09,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:09,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:33:09,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:09,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:33:09,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:10,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 12:33:10,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:10,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:33:10,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:10,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 12:33:10,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:10,063 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-10 12:33:10,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:33:10,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381532974] [2022-01-10 12:33:10,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381532974] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:33:10,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084071822] [2022-01-10 12:33:10,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 12:33:10,063 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:33:10,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:33:10,065 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) [2022-01-10 12:33:10,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-10 12:33:10,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 12:33:10,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 12:33:10,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 12:33:10,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 12:33:13,088 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-10 12:33:13,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 12:33:13,844 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-10 12:33:13,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084071822] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 12:33:13,845 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 12:33:13,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 9] total 18 [2022-01-10 12:33:13,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875314917] [2022-01-10 12:33:13,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 12:33:13,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 12:33:13,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:33:13,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 12:33:13,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=252, Unknown=1, NotChecked=0, Total=306 [2022-01-10 12:33:13,848 INFO L87 Difference]: Start difference. First operand 28 states and 44 transitions. Second operand has 18 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 17 states have internal predecessors, (43), 8 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (14), 11 states have call predecessors, (14), 8 states have call successors, (14) [2022-01-10 12:33:16,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:33:16,326 INFO L93 Difference]: Finished difference Result 65 states and 134 transitions. [2022-01-10 12:33:16,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 12:33:16,328 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 17 states have internal predecessors, (43), 8 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (14), 11 states have call predecessors, (14), 8 states have call successors, (14) Word has length 35 [2022-01-10 12:33:16,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:33:16,330 INFO L225 Difference]: With dead ends: 65 [2022-01-10 12:33:16,330 INFO L226 Difference]: Without dead ends: 40 [2022-01-10 12:33:16,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 64 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=100, Invalid=405, Unknown=1, NotChecked=0, Total=506 [2022-01-10 12:33:16,331 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 31 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 12:33:16,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 123 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 180 Invalid, 0 Unknown, 16 Unchecked, 0.3s Time] [2022-01-10 12:33:16,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-01-10 12:33:16,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2022-01-10 12:33:16,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 20 states have (on average 1.1) internal successors, (22), 22 states have internal predecessors, (22), 6 states have call successors, (6), 1 states have call predecessors, (6), 7 states have return successors, (32), 10 states have call predecessors, (32), 6 states have call successors, (32) [2022-01-10 12:33:16,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 60 transitions. [2022-01-10 12:33:16,346 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 60 transitions. Word has length 35 [2022-01-10 12:33:16,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:33:16,347 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 60 transitions. [2022-01-10 12:33:16,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 17 states have internal predecessors, (43), 8 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (14), 11 states have call predecessors, (14), 8 states have call successors, (14) [2022-01-10 12:33:16,347 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 60 transitions. [2022-01-10 12:33:16,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-10 12:33:16,353 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:33:16,353 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:33:16,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-10 12:33:16,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:33:16,568 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:33:16,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:33:16,568 INFO L85 PathProgramCache]: Analyzing trace with hash -176654579, now seen corresponding path program 3 times [2022-01-10 12:33:16,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:33:16,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751672280] [2022-01-10 12:33:16,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:33:16,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:33:16,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:16,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:33:16,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:16,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:33:16,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:16,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:33:16,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:16,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 12:33:16,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:16,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 12:33:16,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:16,812 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 9 proven. 24 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-10 12:33:16,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:33:16,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751672280] [2022-01-10 12:33:16,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751672280] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:33:16,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234460111] [2022-01-10 12:33:16,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 12:33:16,813 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:33:16,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:33:16,814 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) [2022-01-10 12:33:16,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-10 12:33:16,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-10 12:33:16,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 12:33:16,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 12:33:16,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 12:33:17,018 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-10 12:33:17,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 12:33:17,518 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 17 proven. 9 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-10 12:33:17,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234460111] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 12:33:17,518 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 12:33:17,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 19 [2022-01-10 12:33:17,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987987875] [2022-01-10 12:33:17,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 12:33:17,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-10 12:33:17,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:33:17,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-10 12:33:17,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-01-10 12:33:17,520 INFO L87 Difference]: Start difference. First operand 34 states and 60 transitions. Second operand has 19 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 17 states have internal predecessors, (41), 9 states have call successors, (12), 1 states have call predecessors, (12), 7 states have return successors, (13), 9 states have call predecessors, (13), 9 states have call successors, (13) [2022-01-10 12:33:18,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:33:18,133 INFO L93 Difference]: Finished difference Result 98 states and 204 transitions. [2022-01-10 12:33:18,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-10 12:33:18,133 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 17 states have internal predecessors, (41), 9 states have call successors, (12), 1 states have call predecessors, (12), 7 states have return successors, (13), 9 states have call predecessors, (13), 9 states have call successors, (13) Word has length 35 [2022-01-10 12:33:18,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:33:18,135 INFO L225 Difference]: With dead ends: 98 [2022-01-10 12:33:18,135 INFO L226 Difference]: Without dead ends: 67 [2022-01-10 12:33:18,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=192, Invalid=620, Unknown=0, NotChecked=0, Total=812 [2022-01-10 12:33:18,138 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 58 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 12:33:18,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 71 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 12:33:18,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-01-10 12:33:18,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 58. [2022-01-10 12:33:18,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 38 states have internal predecessors, (41), 9 states have call successors, (9), 4 states have call predecessors, (9), 12 states have return successors, (42), 15 states have call predecessors, (42), 9 states have call successors, (42) [2022-01-10 12:33:18,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 92 transitions. [2022-01-10 12:33:18,151 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 92 transitions. Word has length 35 [2022-01-10 12:33:18,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:33:18,152 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 92 transitions. [2022-01-10 12:33:18,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 17 states have internal predecessors, (41), 9 states have call successors, (12), 1 states have call predecessors, (12), 7 states have return successors, (13), 9 states have call predecessors, (13), 9 states have call successors, (13) [2022-01-10 12:33:18,152 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 92 transitions. [2022-01-10 12:33:18,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-10 12:33:18,154 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:33:18,154 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:33:18,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-10 12:33:18,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:33:18,371 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:33:18,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:33:18,372 INFO L85 PathProgramCache]: Analyzing trace with hash 103619678, now seen corresponding path program 4 times [2022-01-10 12:33:18,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:33:18,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567828981] [2022-01-10 12:33:18,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:33:18,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:33:18,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:18,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:33:18,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:18,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:33:18,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:18,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:33:18,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:18,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 12:33:18,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:18,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-10 12:33:18,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:18,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:33:18,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:18,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 12:33:18,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:18,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:33:18,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:18,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 12:33:18,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:18,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:33:18,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:18,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 12:33:18,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:18,701 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 62 proven. 28 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2022-01-10 12:33:18,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:33:18,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567828981] [2022-01-10 12:33:18,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567828981] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:33:18,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881653204] [2022-01-10 12:33:18,702 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 12:33:18,702 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:33:18,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:33:18,703 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) [2022-01-10 12:33:18,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-10 12:33:18,862 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 12:33:18,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 12:33:18,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-10 12:33:18,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 12:33:19,094 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 90 proven. 46 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2022-01-10 12:33:19,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 12:33:20,237 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 90 proven. 75 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-01-10 12:33:20,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881653204] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 12:33:20,238 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 12:33:20,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 13] total 24 [2022-01-10 12:33:20,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789302214] [2022-01-10 12:33:20,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 12:33:20,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-10 12:33:20,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:33:20,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-10 12:33:20,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2022-01-10 12:33:20,239 INFO L87 Difference]: Start difference. First operand 58 states and 92 transitions. Second operand has 24 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 24 states have internal predecessors, (56), 12 states have call successors, (17), 1 states have call predecessors, (17), 12 states have return successors, (22), 13 states have call predecessors, (22), 12 states have call successors, (22) [2022-01-10 12:33:20,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:33:20,937 INFO L93 Difference]: Finished difference Result 116 states and 185 transitions. [2022-01-10 12:33:20,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-10 12:33:20,938 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 24 states have internal predecessors, (56), 12 states have call successors, (17), 1 states have call predecessors, (17), 12 states have return successors, (22), 13 states have call predecessors, (22), 12 states have call successors, (22) Word has length 71 [2022-01-10 12:33:20,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:33:20,939 INFO L225 Difference]: With dead ends: 116 [2022-01-10 12:33:20,939 INFO L226 Difference]: Without dead ends: 59 [2022-01-10 12:33:20,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 148 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=204, Invalid=852, Unknown=0, NotChecked=0, Total=1056 [2022-01-10 12:33:20,941 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 54 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 12:33:20,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 202 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 12:33:20,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-01-10 12:33:20,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 50. [2022-01-10 12:33:20,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 33 states have (on average 1.121212121212121) internal successors, (37), 34 states have internal predecessors, (37), 6 states have call successors, (6), 4 states have call predecessors, (6), 10 states have return successors, (23), 11 states have call predecessors, (23), 6 states have call successors, (23) [2022-01-10 12:33:20,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 66 transitions. [2022-01-10 12:33:20,950 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 66 transitions. Word has length 71 [2022-01-10 12:33:20,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:33:20,951 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 66 transitions. [2022-01-10 12:33:20,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 24 states have internal predecessors, (56), 12 states have call successors, (17), 1 states have call predecessors, (17), 12 states have return successors, (22), 13 states have call predecessors, (22), 12 states have call successors, (22) [2022-01-10 12:33:20,951 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 66 transitions. [2022-01-10 12:33:20,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-01-10 12:33:20,953 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:33:20,953 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 16, 9, 9, 9, 9, 9, 9, 7, 3, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:33:20,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-10 12:33:21,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:33:21,176 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:33:21,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:33:21,176 INFO L85 PathProgramCache]: Analyzing trace with hash 536940144, now seen corresponding path program 5 times [2022-01-10 12:33:21,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:33:21,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612273446] [2022-01-10 12:33:21,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:33:21,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:33:21,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:21,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:33:21,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:21,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:33:21,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:21,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:33:21,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:21,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:33:21,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:21,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 12:33:21,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:21,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 12:33:21,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:21,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-10 12:33:21,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:21,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:33:21,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:21,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:33:21,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:21,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:33:21,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:21,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 12:33:21,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:21,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 12:33:21,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:21,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-10 12:33:21,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:21,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:33:21,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:21,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:33:21,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:21,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:33:21,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:21,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 12:33:21,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:21,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 12:33:21,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:21,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-10 12:33:21,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:21,622 INFO L134 CoverageAnalysis]: Checked inductivity of 912 backedges. 59 proven. 181 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2022-01-10 12:33:21,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:33:21,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612273446] [2022-01-10 12:33:21,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612273446] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:33:21,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773018087] [2022-01-10 12:33:21,623 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 12:33:21,623 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:33:21,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:33:21,624 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) [2022-01-10 12:33:21,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-10 12:33:21,925 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-01-10 12:33:21,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 12:33:21,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-10 12:33:21,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 12:33:22,874 INFO L134 CoverageAnalysis]: Checked inductivity of 912 backedges. 288 proven. 118 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2022-01-10 12:33:22,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 12:33:27,292 INFO L134 CoverageAnalysis]: Checked inductivity of 912 backedges. 277 proven. 106 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2022-01-10 12:33:27,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773018087] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 12:33:27,293 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 12:33:27,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 14] total 35 [2022-01-10 12:33:27,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867003709] [2022-01-10 12:33:27,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 12:33:27,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-10 12:33:27,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:33:27,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-10 12:33:27,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=992, Unknown=0, NotChecked=0, Total=1190 [2022-01-10 12:33:27,295 INFO L87 Difference]: Start difference. First operand 50 states and 66 transitions. Second operand has 35 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 32 states have internal predecessors, (69), 16 states have call successors, (23), 1 states have call predecessors, (23), 14 states have return successors, (26), 17 states have call predecessors, (26), 16 states have call successors, (26) [2022-01-10 12:33:29,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:33:29,447 INFO L93 Difference]: Finished difference Result 121 states and 212 transitions. [2022-01-10 12:33:29,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-10 12:33:29,448 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 32 states have internal predecessors, (69), 16 states have call successors, (23), 1 states have call predecessors, (23), 14 states have return successors, (26), 17 states have call predecessors, (26), 16 states have call successors, (26) Word has length 125 [2022-01-10 12:33:29,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:33:29,450 INFO L225 Difference]: With dead ends: 121 [2022-01-10 12:33:29,450 INFO L226 Difference]: Without dead ends: 68 [2022-01-10 12:33:29,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=520, Invalid=1832, Unknown=0, NotChecked=0, Total=2352 [2022-01-10 12:33:29,452 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 97 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-10 12:33:29,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 167 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-10 12:33:29,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-01-10 12:33:29,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 65. [2022-01-10 12:33:29,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 44 states have internal predecessors, (50), 9 states have call successors, (9), 8 states have call predecessors, (9), 10 states have return successors, (29), 12 states have call predecessors, (29), 9 states have call successors, (29) [2022-01-10 12:33:29,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 88 transitions. [2022-01-10 12:33:29,463 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 88 transitions. Word has length 125 [2022-01-10 12:33:29,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:33:29,463 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 88 transitions. [2022-01-10 12:33:29,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 32 states have internal predecessors, (69), 16 states have call successors, (23), 1 states have call predecessors, (23), 14 states have return successors, (26), 17 states have call predecessors, (26), 16 states have call successors, (26) [2022-01-10 12:33:29,464 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 88 transitions. [2022-01-10 12:33:29,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-01-10 12:33:29,465 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:33:29,465 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 19, 12, 12, 12, 12, 12, 12, 7, 6, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:33:29,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-10 12:33:29,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:33:29,667 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:33:29,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:33:29,668 INFO L85 PathProgramCache]: Analyzing trace with hash 686923417, now seen corresponding path program 6 times [2022-01-10 12:33:29,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:33:29,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413350777] [2022-01-10 12:33:29,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:33:29,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:33:29,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:29,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:33:29,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:29,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:33:29,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:30,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:33:30,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:30,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:33:30,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:30,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 12:33:30,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:30,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 12:33:30,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:30,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:33:30,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:30,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 12:33:30,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:30,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-10 12:33:30,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:30,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:33:30,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:30,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:33:30,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:30,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:33:30,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:30,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 12:33:30,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:30,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 12:33:30,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:30,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:33:30,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:30,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 12:33:30,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:30,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-10 12:33:30,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:30,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:33:30,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:30,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:33:30,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:30,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:33:30,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:30,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 12:33:30,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:30,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 12:33:30,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:30,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:33:30,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:30,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 12:33:30,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:30,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-10 12:33:30,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:30,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1569 backedges. 63 proven. 360 refuted. 0 times theorem prover too weak. 1146 trivial. 0 not checked. [2022-01-10 12:33:30,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:33:30,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413350777] [2022-01-10 12:33:30,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413350777] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:33:30,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506032728] [2022-01-10 12:33:30,260 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-10 12:33:30,260 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:33:30,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:33:30,261 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) [2022-01-10 12:33:30,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-10 12:33:30,527 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-01-10 12:33:30,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 12:33:30,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-10 12:33:30,535 INFO L286 TraceCheckSpWp]: Computing forward predicates...