/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/nla-digbench-scaling/divbin2_unwindbound5.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 08:54:50,236 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 08:54:50,238 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 08:54:50,293 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 08:54:50,307 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 08:54:50,308 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 08:54:50,309 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 08:54:50,311 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 08:54:50,312 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 08:54:50,312 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 08:54:50,314 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 08:54:50,315 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 08:54:50,316 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 08:54:50,320 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 08:54:50,321 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 08:54:50,322 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 08:54:50,327 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 08:54:50,331 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 08:54:50,332 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 08:54:50,332 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 08:54:50,334 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 08:54:50,347 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 08:54:50,347 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 08:54:50,347 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 08:54:50,347 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 08:54:50,348 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 08:54:50,348 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 08:54:50,348 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 08:54:50,348 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 08:54:50,348 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 08:54:50,349 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 08:54:50,349 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 08:54:50,349 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 08:54:50,349 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 08:54:50,349 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 08:54:50,349 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 08:54:50,349 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 08:54:50,349 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 08:54:50,349 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 08:54:50,349 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 08:54:50,349 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 08:54:50,349 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 08:54:50,350 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 08:54:50,350 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 08:54:50,350 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 08:54:50,350 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 08:54:50,350 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 08:54:50,350 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 08:54:50,350 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 08:54:50,350 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 08:54:50,350 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 08:54:50,350 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 08:54:50,350 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 08:54:50,351 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 08:54:50,352 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 08:54:50,509 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 08:54:50,524 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 08:54:50,526 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 08:54:50,526 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 08:54:50,528 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 08:54:50,528 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin2_unwindbound5.i [2022-01-10 08:54:50,583 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d15d1ef46/42138b4d8c9646d0b47c7d5046140c50/FLAG14bef631b [2022-01-10 08:54:50,931 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 08:54:50,932 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin2_unwindbound5.i [2022-01-10 08:54:50,938 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d15d1ef46/42138b4d8c9646d0b47c7d5046140c50/FLAG14bef631b [2022-01-10 08:54:50,951 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d15d1ef46/42138b4d8c9646d0b47c7d5046140c50 [2022-01-10 08:54:50,952 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 08:54:50,953 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 08:54:50,954 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 08:54:50,954 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 08:54:50,959 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 08:54:50,959 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 08:54:50" (1/1) ... [2022-01-10 08:54:50,960 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28b2624a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:54:50, skipping insertion in model container [2022-01-10 08:54:50,960 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 08:54:50" (1/1) ... [2022-01-10 08:54:50,965 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 08:54:50,975 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 08:54:51,098 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin2_unwindbound5.i[951,964] [2022-01-10 08:54:51,106 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 08:54:51,112 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 08:54:51,120 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin2_unwindbound5.i[951,964] [2022-01-10 08:54:51,123 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 08:54:51,132 INFO L208 MainTranslator]: Completed translation [2022-01-10 08:54:51,132 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:54:51 WrapperNode [2022-01-10 08:54:51,132 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 08:54:51,133 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 08:54:51,133 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 08:54:51,133 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 08:54:51,137 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:54:51" (1/1) ... [2022-01-10 08:54:51,142 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:54:51" (1/1) ... [2022-01-10 08:54:51,153 INFO L137 Inliner]: procedures = 16, calls = 8, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 61 [2022-01-10 08:54:51,153 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 08:54:51,153 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 08:54:51,154 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 08:54:51,154 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 08:54:51,158 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:54:51" (1/1) ... [2022-01-10 08:54:51,158 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:54:51" (1/1) ... [2022-01-10 08:54:51,160 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:54:51" (1/1) ... [2022-01-10 08:54:51,160 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:54:51" (1/1) ... [2022-01-10 08:54:51,162 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:54:51" (1/1) ... [2022-01-10 08:54:51,164 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:54:51" (1/1) ... [2022-01-10 08:54:51,165 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:54:51" (1/1) ... [2022-01-10 08:54:51,166 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 08:54:51,167 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 08:54:51,167 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 08:54:51,167 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 08:54:51,168 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:54:51" (1/1) ... [2022-01-10 08:54:51,174 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 08:54:51,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 08:54:51,191 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 08:54:51,219 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 08:54:51,234 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 08:54:51,234 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 08:54:51,235 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 08:54:51,235 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 08:54:51,273 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 08:54:51,274 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 08:54:51,383 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 08:54:51,387 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 08:54:51,387 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-10 08:54:51,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:54:51 BoogieIcfgContainer [2022-01-10 08:54:51,389 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 08:54:51,389 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 08:54:51,389 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 08:54:51,403 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 08:54:51,405 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:54:51" (1/1) ... [2022-01-10 08:54:51,476 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 08:54:51 BasicIcfg [2022-01-10 08:54:51,479 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 08:54:51,480 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 08:54:51,480 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 08:54:51,482 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 08:54:51,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 08:54:50" (1/4) ... [2022-01-10 08:54:51,483 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@aa7a33f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 08:54:51, skipping insertion in model container [2022-01-10 08:54:51,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:54:51" (2/4) ... [2022-01-10 08:54:51,484 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@aa7a33f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 08:54:51, skipping insertion in model container [2022-01-10 08:54:51,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:54:51" (3/4) ... [2022-01-10 08:54:51,484 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@aa7a33f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 08:54:51, skipping insertion in model container [2022-01-10 08:54:51,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 08:54:51" (4/4) ... [2022-01-10 08:54:51,485 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2_unwindbound5.iTransformedIcfg [2022-01-10 08:54:51,488 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 08:54:51,488 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-01-10 08:54:51,521 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 08:54:51,526 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 08:54:51,526 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-01-10 08:54:51,536 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:54:51,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-01-10 08:54:51,540 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:54:51,540 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:54:51,540 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:54:51,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:54:51,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1545003950, now seen corresponding path program 1 times [2022-01-10 08:54:51,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 08:54:51,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093371641] [2022-01-10 08:54:51,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:54:51,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 08:54:51,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:54:51,703 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 08:54:51,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 08:54:51,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093371641] [2022-01-10 08:54:51,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093371641] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:54:51,705 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:54:51,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 08:54:51,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432512883] [2022-01-10 08:54:51,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:54:51,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 08:54:51,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 08:54:51,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 08:54:51,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 08:54:51,738 INFO L87 Difference]: Start difference. First operand has 21 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:54:51,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:54:51,756 INFO L93 Difference]: Finished difference Result 37 states and 50 transitions. [2022-01-10 08:54:51,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 08:54:51,758 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-01-10 08:54:51,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:54:51,763 INFO L225 Difference]: With dead ends: 37 [2022-01-10 08:54:51,763 INFO L226 Difference]: Without dead ends: 17 [2022-01-10 08:54:51,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 08:54:51,769 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:54:51,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:54:51,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-01-10 08:54:51,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-01-10 08:54:51,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:54:51,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-01-10 08:54:51,793 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 7 [2022-01-10 08:54:51,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:54:51,794 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-01-10 08:54:51,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:54:51,795 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-01-10 08:54:51,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-01-10 08:54:51,796 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:54:51,796 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:54:51,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 08:54:51,797 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:54:51,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:54:51,800 INFO L85 PathProgramCache]: Analyzing trace with hash 680866159, now seen corresponding path program 1 times [2022-01-10 08:54:51,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 08:54:51,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863341084] [2022-01-10 08:54:51,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:54:51,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 08:54:51,834 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-10 08:54:51,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1811915924] [2022-01-10 08:54:51,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:54:51,835 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 08:54:51,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 08:54:51,848 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 08:54:51,849 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 08:54:51,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:54:51,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 08:54:51,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:54:52,046 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 08:54:52,047 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:54:52,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 08:54:52,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863341084] [2022-01-10 08:54:52,048 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-10 08:54:52,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811915924] [2022-01-10 08:54:52,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811915924] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:54:52,051 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:54:52,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:54:52,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015142048] [2022-01-10 08:54:52,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:54:52,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 08:54:52,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 08:54:52,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 08:54:52,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 08:54:52,055 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:54:52,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:54:52,079 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2022-01-10 08:54:52,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:54:52,080 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-01-10 08:54:52,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:54:52,081 INFO L225 Difference]: With dead ends: 31 [2022-01-10 08:54:52,081 INFO L226 Difference]: Without dead ends: 19 [2022-01-10 08:54:52,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 08:54:52,082 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:54:52,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 52 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:54:52,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-01-10 08:54:52,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-01-10 08:54:52,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:54:52,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2022-01-10 08:54:52,086 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 8 [2022-01-10 08:54:52,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:54:52,086 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2022-01-10 08:54:52,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:54:52,086 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2022-01-10 08:54:52,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-01-10 08:54:52,087 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:54:52,087 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:54:52,104 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 08:54:52,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 08:54:52,296 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:54:52,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:54:52,296 INFO L85 PathProgramCache]: Analyzing trace with hash -333969099, now seen corresponding path program 1 times [2022-01-10 08:54:52,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 08:54:52,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27790180] [2022-01-10 08:54:52,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:54:52,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 08:54:52,311 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-10 08:54:52,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1973319822] [2022-01-10 08:54:52,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:54:52,311 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 08:54:52,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 08:54:52,312 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 08:54:52,313 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 08:54:52,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:54:52,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-10 08:54:52,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:54:52,545 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 08:54:52,546 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:54:52,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 08:54:52,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27790180] [2022-01-10 08:54:52,546 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-10 08:54:52,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973319822] [2022-01-10 08:54:52,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973319822] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:54:52,546 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:54:52,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:54:52,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985006727] [2022-01-10 08:54:52,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:54:52,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:54:52,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 08:54:52,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:54:52,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:54:52,548 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:54:52,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:54:52,623 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2022-01-10 08:54:52,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 08:54:52,623 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-01-10 08:54:52,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:54:52,625 INFO L225 Difference]: With dead ends: 38 [2022-01-10 08:54:52,625 INFO L226 Difference]: Without dead ends: 31 [2022-01-10 08:54:52,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:54:52,628 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 19 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:54:52,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 54 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:54:52,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-01-10 08:54:52,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2022-01-10 08:54:52,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 25 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:54:52,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2022-01-10 08:54:52,636 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 9 [2022-01-10 08:54:52,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:54:52,636 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2022-01-10 08:54:52,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:54:52,637 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2022-01-10 08:54:52,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-10 08:54:52,637 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:54:52,638 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:54:52,656 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 08:54:52,847 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,SelfDestructingSolverStorable2 [2022-01-10 08:54:52,848 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:54:52,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:54:52,848 INFO L85 PathProgramCache]: Analyzing trace with hash 2004489561, now seen corresponding path program 1 times [2022-01-10 08:54:52,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 08:54:52,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285398775] [2022-01-10 08:54:52,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:54:52,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 08:54:52,862 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-10 08:54:52,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1121434800] [2022-01-10 08:54:52,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:54:52,862 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 08:54:52,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 08:54:52,866 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 08:54:52,867 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 08:54:52,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:54:52,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 08:54:52,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:54:53,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:54:53,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 08:54:53,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:54:53,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 08:54:53,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285398775] [2022-01-10 08:54:53,210 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-10 08:54:53,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121434800] [2022-01-10 08:54:53,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121434800] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 08:54:53,210 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 08:54:53,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-01-10 08:54:53,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242286231] [2022-01-10 08:54:53,210 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 08:54:53,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 08:54:53,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 08:54:53,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 08:54:53,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-01-10 08:54:53,211 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:54:53,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:54:53,352 INFO L93 Difference]: Finished difference Result 72 states and 89 transitions. [2022-01-10 08:54:53,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 08:54:53,353 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-01-10 08:54:53,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:54:53,354 INFO L225 Difference]: With dead ends: 72 [2022-01-10 08:54:53,354 INFO L226 Difference]: Without dead ends: 60 [2022-01-10 08:54:53,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2022-01-10 08:54:53,355 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 32 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 08:54:53,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 99 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 08:54:53,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-01-10 08:54:53,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 34. [2022-01-10 08:54:53,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 32 states have (on average 1.3125) internal successors, (42), 33 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:54:53,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2022-01-10 08:54:53,360 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 11 [2022-01-10 08:54:53,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:54:53,360 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2022-01-10 08:54:53,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:54:53,360 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2022-01-10 08:54:53,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-10 08:54:53,360 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:54:53,360 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:54:53,379 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 08:54:53,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 08:54:53,569 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:54:53,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:54:53,570 INFO L85 PathProgramCache]: Analyzing trace with hash 2043650699, now seen corresponding path program 1 times [2022-01-10 08:54:53,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 08:54:53,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246836745] [2022-01-10 08:54:53,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:54:53,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 08:54:53,582 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-10 08:54:53,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [300319658] [2022-01-10 08:54:53,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:54:53,583 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 08:54:53,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 08:54:53,584 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 08:54:53,585 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 08:54:53,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:54:53,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-10 08:54:53,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:54:53,852 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:54:53,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 08:54:55,378 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:54:55,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 08:54:55,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246836745] [2022-01-10 08:54:55,379 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-10 08:54:55,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300319658] [2022-01-10 08:54:55,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300319658] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 08:54:55,379 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 08:54:55,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-01-10 08:54:55,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135039836] [2022-01-10 08:54:55,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:54:55,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:54:55,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 08:54:55,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:54:55,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:54:55,380 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:54:55,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:54:55,408 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2022-01-10 08:54:55,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:54:55,409 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-01-10 08:54:55,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:54:55,410 INFO L225 Difference]: With dead ends: 45 [2022-01-10 08:54:55,410 INFO L226 Difference]: Without dead ends: 43 [2022-01-10 08:54:55,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-01-10 08:54:55,411 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 15 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:54:55,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 61 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 23 Unchecked, 0.0s Time] [2022-01-10 08:54:55,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-01-10 08:54:55,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2022-01-10 08:54:55,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 36 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:54:55,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2022-01-10 08:54:55,420 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 12 [2022-01-10 08:54:55,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:54:55,421 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2022-01-10 08:54:55,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:54:55,421 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2022-01-10 08:54:55,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-10 08:54:55,421 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:54:55,421 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:54:55,427 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 08:54:55,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 08:54:55,625 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:54:55,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:54:55,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1071374419, now seen corresponding path program 1 times [2022-01-10 08:54:55,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 08:54:55,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105953055] [2022-01-10 08:54:55,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:54:55,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 08:54:55,640 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-10 08:54:55,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [977823992] [2022-01-10 08:54:55,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:54:55,641 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 08:54:55,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 08:54:55,644 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 08:54:55,645 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 08:54:55,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:54:55,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-10 08:54:55,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:54:55,909 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:54:55,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 08:54:56,026 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:54:56,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 08:54:56,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105953055] [2022-01-10 08:54:56,027 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-10 08:54:56,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977823992] [2022-01-10 08:54:56,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977823992] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 08:54:56,027 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 08:54:56,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-01-10 08:54:56,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830610879] [2022-01-10 08:54:56,027 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 08:54:56,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-10 08:54:56,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 08:54:56,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-10 08:54:56,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-01-10 08:54:56,028 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:54:56,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:54:56,526 INFO L93 Difference]: Finished difference Result 96 states and 116 transitions. [2022-01-10 08:54:56,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-10 08:54:56,528 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-01-10 08:54:56,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:54:56,529 INFO L225 Difference]: With dead ends: 96 [2022-01-10 08:54:56,529 INFO L226 Difference]: Without dead ends: 92 [2022-01-10 08:54:56,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2022-01-10 08:54:56,529 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 63 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 08:54:56,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 193 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 21 Invalid, 0 Unknown, 19 Unchecked, 0.2s Time] [2022-01-10 08:54:56,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-01-10 08:54:56,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 75. [2022-01-10 08:54:56,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 73 states have (on average 1.2876712328767124) internal successors, (94), 74 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:54:56,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 94 transitions. [2022-01-10 08:54:56,537 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 94 transitions. Word has length 13 [2022-01-10 08:54:56,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:54:56,537 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 94 transitions. [2022-01-10 08:54:56,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:54:56,537 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 94 transitions. [2022-01-10 08:54:56,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-10 08:54:56,538 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:54:56,538 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:54:56,569 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 08:54:56,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 08:54:56,739 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:54:56,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:54:56,739 INFO L85 PathProgramCache]: Analyzing trace with hash -14955902, now seen corresponding path program 1 times [2022-01-10 08:54:56,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 08:54:56,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180898359] [2022-01-10 08:54:56,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:54:56,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 08:54:56,747 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-10 08:54:56,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1515684800] [2022-01-10 08:54:56,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:54:56,748 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 08:54:56,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 08:54:56,755 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 08:54:56,758 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 08:54:56,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:54:56,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 08:54:56,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:54:56,814 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:54:56,814 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:54:56,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 08:54:56,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180898359] [2022-01-10 08:54:56,815 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-10 08:54:56,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515684800] [2022-01-10 08:54:56,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515684800] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:54:56,815 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:54:56,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:54:56,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148924099] [2022-01-10 08:54:56,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:54:56,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:54:56,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 08:54:56,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:54:56,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:54:56,816 INFO L87 Difference]: Start difference. First operand 75 states and 94 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:54:56,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:54:56,851 INFO L93 Difference]: Finished difference Result 96 states and 118 transitions. [2022-01-10 08:54:56,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:54:56,851 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-10 08:54:56,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:54:56,852 INFO L225 Difference]: With dead ends: 96 [2022-01-10 08:54:56,852 INFO L226 Difference]: Without dead ends: 46 [2022-01-10 08:54:56,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:54:56,853 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 3 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:54:56,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 29 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:54:56,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-01-10 08:54:56,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2022-01-10 08:54:56,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 40 states have (on average 1.3) internal successors, (52), 41 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:54:56,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2022-01-10 08:54:56,860 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 15 [2022-01-10 08:54:56,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:54:56,861 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2022-01-10 08:54:56,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:54:56,861 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2022-01-10 08:54:56,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-10 08:54:56,861 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:54:56,861 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:54:56,885 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 08:54:57,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 08:54:57,076 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:54:57,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:54:57,076 INFO L85 PathProgramCache]: Analyzing trace with hash -288205120, now seen corresponding path program 1 times [2022-01-10 08:54:57,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 08:54:57,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270497442] [2022-01-10 08:54:57,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:54:57,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 08:54:57,085 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-10 08:54:57,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1776584128] [2022-01-10 08:54:57,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:54:57,086 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 08:54:57,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 08:54:57,087 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 08:54:57,087 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 08:54:57,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:54:57,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:54:57,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:54:57,151 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:54:57,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 08:54:57,180 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:54:57,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 08:54:57,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270497442] [2022-01-10 08:54:57,181 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-10 08:54:57,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776584128] [2022-01-10 08:54:57,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776584128] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 08:54:57,181 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 08:54:57,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2022-01-10 08:54:57,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108005497] [2022-01-10 08:54:57,181 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 08:54:57,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:54:57,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 08:54:57,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:54:57,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:54:57,182 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:54:57,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:54:57,228 INFO L93 Difference]: Finished difference Result 77 states and 87 transitions. [2022-01-10 08:54:57,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:54:57,229 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-10 08:54:57,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:54:57,229 INFO L225 Difference]: With dead ends: 77 [2022-01-10 08:54:57,229 INFO L226 Difference]: Without dead ends: 73 [2022-01-10 08:54:57,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:54:57,230 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 43 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:54:57,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 59 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:54:57,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-01-10 08:54:57,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 55. [2022-01-10 08:54:57,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 53 states have (on average 1.3018867924528301) internal successors, (69), 54 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:54:57,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 69 transitions. [2022-01-10 08:54:57,235 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 69 transitions. Word has length 16 [2022-01-10 08:54:57,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:54:57,235 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 69 transitions. [2022-01-10 08:54:57,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:54:57,235 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 69 transitions. [2022-01-10 08:54:57,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-10 08:54:57,235 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:54:57,236 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:54:57,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-10 08:54:57,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 08:54:57,451 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:54:57,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:54:57,452 INFO L85 PathProgramCache]: Analyzing trace with hash -2041279656, now seen corresponding path program 1 times [2022-01-10 08:54:57,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 08:54:57,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123356689] [2022-01-10 08:54:57,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:54:57,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 08:54:57,460 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-10 08:54:57,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [498680778] [2022-01-10 08:54:57,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:54:57,461 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 08:54:57,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 08:54:57,462 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 08:54:57,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-10 08:54:57,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:54:57,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-10 08:54:57,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:54:57,897 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:54:57,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 08:55:00,424 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:55:00,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 08:55:00,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123356689] [2022-01-10 08:55:00,425 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-10 08:55:00,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498680778] [2022-01-10 08:55:00,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498680778] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 08:55:00,426 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 08:55:00,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2022-01-10 08:55:00,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976585761] [2022-01-10 08:55:00,428 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 08:55:00,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-10 08:55:00,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 08:55:00,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-10 08:55:00,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-01-10 08:55:00,429 INFO L87 Difference]: Start difference. First operand 55 states and 69 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:55:04,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:55:04,716 INFO L93 Difference]: Finished difference Result 75 states and 93 transitions. [2022-01-10 08:55:04,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-10 08:55:04,716 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-10 08:55:04,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:55:04,717 INFO L225 Difference]: With dead ends: 75 [2022-01-10 08:55:04,717 INFO L226 Difference]: Without dead ends: 73 [2022-01-10 08:55:04,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2022-01-10 08:55:04,718 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 58 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 08:55:04,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 107 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 35 Invalid, 0 Unknown, 51 Unchecked, 0.1s Time] [2022-01-10 08:55:04,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-01-10 08:55:04,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 64. [2022-01-10 08:55:04,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 62 states have (on average 1.2903225806451613) internal successors, (80), 63 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:55:04,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 80 transitions. [2022-01-10 08:55:04,723 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 80 transitions. Word has length 18 [2022-01-10 08:55:04,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:55:04,723 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 80 transitions. [2022-01-10 08:55:04,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:55:04,723 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 80 transitions. [2022-01-10 08:55:04,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-10 08:55:04,724 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:55:04,724 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:55:04,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-10 08:55:04,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-01-10 08:55:04,932 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:55:04,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:55:04,932 INFO L85 PathProgramCache]: Analyzing trace with hash -2040356135, now seen corresponding path program 1 times [2022-01-10 08:55:04,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 08:55:04,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800124694] [2022-01-10 08:55:04,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:55:04,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 08:55:04,940 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-10 08:55:04,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1909654681] [2022-01-10 08:55:04,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:55:04,941 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 08:55:04,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 08:55:04,951 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 08:55:04,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-10 08:55:05,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:55:05,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 08:55:05,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:55:07,156 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:55:07,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 08:55:07,285 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:55:07,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 08:55:07,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800124694] [2022-01-10 08:55:07,285 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-10 08:55:07,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909654681] [2022-01-10 08:55:07,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909654681] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 08:55:07,285 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 08:55:07,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-01-10 08:55:07,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299804106] [2022-01-10 08:55:07,286 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 08:55:07,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 08:55:07,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 08:55:07,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 08:55:07,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=37, Unknown=1, NotChecked=0, Total=56 [2022-01-10 08:55:07,287 INFO L87 Difference]: Start difference. First operand 64 states and 80 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:55:07,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:55:07,875 INFO L93 Difference]: Finished difference Result 91 states and 109 transitions. [2022-01-10 08:55:07,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 08:55:07,876 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-10 08:55:07,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:55:07,876 INFO L225 Difference]: With dead ends: 91 [2022-01-10 08:55:07,877 INFO L226 Difference]: Without dead ends: 71 [2022-01-10 08:55:07,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=34, Invalid=75, Unknown=1, NotChecked=0, Total=110 [2022-01-10 08:55:07,877 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 15 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:55:07,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 95 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 28 Invalid, 0 Unknown, 14 Unchecked, 0.0s Time] [2022-01-10 08:55:07,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-01-10 08:55:07,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 59. [2022-01-10 08:55:07,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 57 states have (on average 1.2280701754385965) internal successors, (70), 58 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:55:07,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2022-01-10 08:55:07,883 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 18 [2022-01-10 08:55:07,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:55:07,883 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2022-01-10 08:55:07,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:55:07,883 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2022-01-10 08:55:07,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-10 08:55:07,883 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:55:07,883 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:55:07,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-10 08:55:08,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-10 08:55:08,100 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:55:08,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:55:08,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1144803456, now seen corresponding path program 1 times [2022-01-10 08:55:08,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 08:55:08,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896954547] [2022-01-10 08:55:08,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:55:08,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 08:55:08,117 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-10 08:55:08,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [12438401] [2022-01-10 08:55:08,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:55:08,117 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 08:55:08,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 08:55:08,118 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 08:55:08,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-10 08:55:08,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:55:08,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-10 08:55:08,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:55:21,293 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:55:21,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 08:55:25,351 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:55:25,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 08:55:25,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896954547] [2022-01-10 08:55:25,351 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-10 08:55:25,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12438401] [2022-01-10 08:55:25,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12438401] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 08:55:25,351 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 08:55:25,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2022-01-10 08:55:25,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578833222] [2022-01-10 08:55:25,352 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 08:55:25,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 08:55:25,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 08:55:25,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 08:55:25,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=91, Unknown=6, NotChecked=0, Total=132 [2022-01-10 08:55:25,352 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:55:35,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:55:35,589 INFO L93 Difference]: Finished difference Result 74 states and 86 transitions. [2022-01-10 08:55:35,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 08:55:35,590 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-10 08:55:35,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:55:35,591 INFO L225 Difference]: With dead ends: 74 [2022-01-10 08:55:35,591 INFO L226 Difference]: Without dead ends: 70 [2022-01-10 08:55:35,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 26.4s TimeCoverageRelationStatistics Valid=46, Invalid=126, Unknown=10, NotChecked=0, Total=182 [2022-01-10 08:55:35,592 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 26 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 08:55:35,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 148 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 11 Invalid, 0 Unknown, 26 Unchecked, 0.1s Time] [2022-01-10 08:55:35,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-01-10 08:55:35,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2022-01-10 08:55:35,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 63 states have (on average 1.2222222222222223) internal successors, (77), 64 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:55:35,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2022-01-10 08:55:35,610 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 19 [2022-01-10 08:55:35,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:55:35,611 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2022-01-10 08:55:35,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:55:35,611 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2022-01-10 08:55:35,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-10 08:55:35,612 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:55:35,612 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:55:35,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-10 08:55:35,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-10 08:55:35,813 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:55:35,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:55:35,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1391579703, now seen corresponding path program 1 times [2022-01-10 08:55:35,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 08:55:35,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901589697] [2022-01-10 08:55:35,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:55:35,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 08:55:35,824 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-10 08:55:35,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1794326148] [2022-01-10 08:55:35,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:55:35,825 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 08:55:35,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 08:55:35,829 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 08:55:35,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-10 08:55:35,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:55:35,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-10 08:55:35,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:55:36,468 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:55:36,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 08:55:36,987 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:55:36,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 08:55:36,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901589697] [2022-01-10 08:55:36,988 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-10 08:55:36,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794326148] [2022-01-10 08:55:36,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794326148] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 08:55:36,988 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 08:55:36,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-01-10 08:55:36,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424544344] [2022-01-10 08:55:36,988 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 08:55:36,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-10 08:55:36,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 08:55:36,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-10 08:55:36,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-01-10 08:55:36,989 INFO L87 Difference]: Start difference. First operand 65 states and 77 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:55:37,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:55:37,246 INFO L93 Difference]: Finished difference Result 85 states and 102 transitions. [2022-01-10 08:55:37,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 08:55:37,247 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-10 08:55:37,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:55:37,247 INFO L225 Difference]: With dead ends: 85 [2022-01-10 08:55:37,247 INFO L226 Difference]: Without dead ends: 67 [2022-01-10 08:55:37,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-01-10 08:55:37,248 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 12 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 08:55:37,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 172 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 18 Invalid, 0 Unknown, 22 Unchecked, 0.1s Time] [2022-01-10 08:55:37,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-01-10 08:55:37,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-01-10 08:55:37,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 66 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:55:37,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2022-01-10 08:55:37,253 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 21 [2022-01-10 08:55:37,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:55:37,253 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2022-01-10 08:55:37,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:55:37,253 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2022-01-10 08:55:37,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-10 08:55:37,253 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:55:37,253 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:55:37,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-10 08:55:37,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-10 08:55:37,457 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:55:37,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:55:37,457 INFO L85 PathProgramCache]: Analyzing trace with hash -370405107, now seen corresponding path program 1 times [2022-01-10 08:55:37,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 08:55:37,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117967975] [2022-01-10 08:55:37,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:55:37,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 08:55:37,465 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-10 08:55:37,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [433788634] [2022-01-10 08:55:37,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:55:37,465 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 08:55:37,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 08:55:37,466 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 08:55:37,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-10 08:55:37,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:55:37,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-10 08:55:37,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:55:37,564 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 08:55:37,564 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:55:37,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 08:55:37,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117967975] [2022-01-10 08:55:37,564 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-10 08:55:37,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433788634] [2022-01-10 08:55:37,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433788634] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:55:37,565 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:55:37,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:55:37,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037667427] [2022-01-10 08:55:37,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:55:37,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:55:37,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 08:55:37,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:55:37,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:55:37,565 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:55:38,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:55:38,092 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2022-01-10 08:55:38,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:55:38,092 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-10 08:55:38,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:55:38,093 INFO L225 Difference]: With dead ends: 72 [2022-01-10 08:55:38,093 INFO L226 Difference]: Without dead ends: 68 [2022-01-10 08:55:38,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:55:38,093 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 15 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-10 08:55:38,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 45 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-10 08:55:38,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-01-10 08:55:38,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 62. [2022-01-10 08:55:38,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 60 states have (on average 1.1666666666666667) internal successors, (70), 61 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:55:38,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2022-01-10 08:55:38,098 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 22 [2022-01-10 08:55:38,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:55:38,098 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2022-01-10 08:55:38,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:55:38,098 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2022-01-10 08:55:38,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-10 08:55:38,099 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:55:38,099 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:55:38,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-10 08:55:38,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-10 08:55:38,308 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:55:38,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:55:38,308 INFO L85 PathProgramCache]: Analyzing trace with hash 866311619, now seen corresponding path program 2 times [2022-01-10 08:55:38,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 08:55:38,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931552590] [2022-01-10 08:55:38,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:55:38,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 08:55:38,317 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-10 08:55:38,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1781610784] [2022-01-10 08:55:38,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 08:55:38,317 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 08:55:38,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 08:55:38,319 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 08:55:38,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-10 08:55:38,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-01-10 08:55:38,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 08:55:38,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 08:55:38,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:55:38,522 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-10 08:55:38,522 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:55:38,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 08:55:38,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931552590] [2022-01-10 08:55:38,523 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-10 08:55:38,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781610784] [2022-01-10 08:55:38,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781610784] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:55:38,523 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:55:38,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:55:38,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446485409] [2022-01-10 08:55:38,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:55:38,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:55:38,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 08:55:38,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:55:38,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:55:38,524 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:55:38,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:55:38,577 INFO L93 Difference]: Finished difference Result 73 states and 81 transitions. [2022-01-10 08:55:38,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 08:55:38,578 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-10 08:55:38,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:55:38,578 INFO L225 Difference]: With dead ends: 73 [2022-01-10 08:55:38,578 INFO L226 Difference]: Without dead ends: 67 [2022-01-10 08:55:38,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:55:38,579 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 26 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:55:38,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 41 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:55:38,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-01-10 08:55:38,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 60. [2022-01-10 08:55:38,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 59 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:55:38,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2022-01-10 08:55:38,583 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 22 [2022-01-10 08:55:38,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:55:38,583 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2022-01-10 08:55:38,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:55:38,584 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2022-01-10 08:55:38,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-10 08:55:38,584 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:55:38,584 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-01-10 08:55:38,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-10 08:55:38,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-10 08:55:38,799 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:55:38,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:55:38,800 INFO L85 PathProgramCache]: Analyzing trace with hash 568911461, now seen corresponding path program 2 times [2022-01-10 08:55:38,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 08:55:38,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003760187] [2022-01-10 08:55:38,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:55:38,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 08:55:38,806 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-10 08:55:38,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1041036818] [2022-01-10 08:55:38,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 08:55:38,806 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 08:55:38,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 08:55:38,811 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 08:55:38,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-10 08:55:38,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 08:55:38,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 08:55:38,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 08:55:38,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:55:39,022 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:55:39,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 08:55:49,798 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:55:49,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 08:55:49,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003760187] [2022-01-10 08:55:49,798 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-10 08:55:49,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041036818] [2022-01-10 08:55:49,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041036818] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 08:55:49,798 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 08:55:49,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2022-01-10 08:55:49,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154758438] [2022-01-10 08:55:49,799 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 08:55:49,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-10 08:55:49,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 08:55:49,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-10 08:55:49,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=48, Unknown=1, NotChecked=0, Total=72 [2022-01-10 08:55:49,799 INFO L87 Difference]: Start difference. First operand 60 states and 67 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:55:51,811 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 08:55:54,014 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 08:55:56,133 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 08:55:58,270 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-10 08:55:58,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:55:58,403 INFO L93 Difference]: Finished difference Result 72 states and 80 transitions. [2022-01-10 08:55:58,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:55:58,404 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-10 08:55:58,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:55:58,404 INFO L225 Difference]: With dead ends: 72 [2022-01-10 08:55:58,404 INFO L226 Difference]: Without dead ends: 46 [2022-01-10 08:55:58,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=29, Invalid=60, Unknown=1, NotChecked=0, Total=90 [2022-01-10 08:55:58,405 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 18 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 5 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2022-01-10 08:55:58,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 59 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 30 Invalid, 4 Unknown, 0 Unchecked, 8.6s Time] [2022-01-10 08:55:58,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-01-10 08:55:58,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-01-10 08:55:58,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 45 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:55:58,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2022-01-10 08:55:58,409 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 24 [2022-01-10 08:55:58,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:55:58,409 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2022-01-10 08:55:58,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:55:58,409 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2022-01-10 08:55:58,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-10 08:55:58,410 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:55:58,410 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:55:58,414 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-01-10 08:55:58,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 08:55:58,610 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:55:58,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:55:58,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1914479848, now seen corresponding path program 3 times [2022-01-10 08:55:58,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 08:55:58,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515508778] [2022-01-10 08:55:58,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:55:58,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 08:55:58,623 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-10 08:55:58,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [391620016] [2022-01-10 08:55:58,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 08:55:58,623 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 08:55:58,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 08:55:58,627 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 08:55:58,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-10 08:55:58,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-10 08:55:58,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 08:55:58,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-10 08:55:58,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:56:07,491 WARN L838 $PredicateComparison]: unable to prove that (and (= (mod (+ |c_ULTIMATE.start_ULTIMATE.start_main_~A~0#1Int| (mod (* 4294967295 |c_ULTIMATE.start_ULTIMATE.start_main_~b~0#1Int|) 4294967296)) 4294967296) |c_ULTIMATE.start_ULTIMATE.start_main_~r~0#1Int|) (<= |c_ULTIMATE.start_ULTIMATE.start_main_~b~0#1Int| |c_ULTIMATE.start_ULTIMATE.start_main_~A~0#1Int|) (exists ((|v_ULTIMATE.start_ULTIMATE.start_main_~b~0#1Int_37| Int)) (let ((.cse0 (mod (* 2 |v_ULTIMATE.start_ULTIMATE.start_main_~b~0#1Int_37|) 4294967296))) (and (not (<= .cse0 |c_ULTIMATE.start_ULTIMATE.start_main_~A~0#1Int|)) (<= (div .cse0 2) |c_ULTIMATE.start_ULTIMATE.start_main_~b~0#1Int|)))) (exists ((|v_ULTIMATE.start_ULTIMATE.start_main_~q~0#1Int_21| Int)) (and (<= |v_ULTIMATE.start_ULTIMATE.start_main_~q~0#1Int_21| 0) (<= 0 |v_ULTIMATE.start_ULTIMATE.start_main_~q~0#1Int_21|) (= (mod (+ (mod (* 2 |v_ULTIMATE.start_ULTIMATE.start_main_~q~0#1Int_21|) 4294967296) 1) 4294967296) |c_ULTIMATE.start_ULTIMATE.start_main_~q~0#1Int|)))) is different from false