/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_NONE.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/divbin2_unwindbound20.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 20:34:39,475 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 20:34:39,477 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 20:34:39,519 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 20:34:39,536 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 20:34:39,537 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 20:34:39,539 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 20:34:39,541 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 20:34:39,547 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 20:34:39,548 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 20:34:39,550 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 20:34:39,555 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 20:34:39,556 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 20:34:39,557 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 20:34:39,558 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 20:34:39,559 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 20:34:39,564 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 20:34:39,572 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 20:34:39,573 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 20:34:39,573 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 20:34:39,574 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_NONE.epf [2022-01-10 20:34:39,607 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 20:34:39,607 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 20:34:39,608 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 20:34:39,608 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 20:34:39,609 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 20:34:39,609 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 20:34:39,609 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 20:34:39,609 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 20:34:39,609 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 20:34:39,610 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 20:34:39,610 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 20:34:39,610 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 20:34:39,610 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 20:34:39,611 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 20:34:39,611 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 20:34:39,611 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 20:34:39,611 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 20:34:39,611 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 20:34:39,611 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 20:34:39,611 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 20:34:39,611 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 20:34:39,612 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 20:34:39,613 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 20:34:39,613 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 20:34:39,613 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 20:34:39,613 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 20:34:39,613 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 20:34:39,613 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 20:34:39,613 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 20:34:39,613 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 20:34:39,613 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 20:34:39,614 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 20:34:39,614 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 20:34:39,614 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_NONE 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 20:34:39,793 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 20:34:39,812 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 20:34:39,814 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 20:34:39,815 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 20:34:39,816 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 20:34:39,817 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin2_unwindbound20.i [2022-01-10 20:34:39,877 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/baec0d0da/8417486b3c684d95ad122f942fc71992/FLAG3c4322136 [2022-01-10 20:34:40,216 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 20:34:40,217 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin2_unwindbound20.i [2022-01-10 20:34:40,222 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/baec0d0da/8417486b3c684d95ad122f942fc71992/FLAG3c4322136 [2022-01-10 20:34:40,235 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/baec0d0da/8417486b3c684d95ad122f942fc71992 [2022-01-10 20:34:40,237 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 20:34:40,238 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 20:34:40,239 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 20:34:40,239 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 20:34:40,247 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 20:34:40,248 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 08:34:40" (1/1) ... [2022-01-10 20:34:40,249 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76f18b16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:34:40, skipping insertion in model container [2022-01-10 20:34:40,249 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 08:34:40" (1/1) ... [2022-01-10 20:34:40,255 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 20:34:40,266 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 20:34:40,475 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_unwindbound20.i[951,964] [2022-01-10 20:34:40,493 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 20:34:40,502 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 20:34:40,518 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_unwindbound20.i[951,964] [2022-01-10 20:34:40,531 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 20:34:40,543 INFO L208 MainTranslator]: Completed translation [2022-01-10 20:34:40,544 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:34:40 WrapperNode [2022-01-10 20:34:40,544 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 20:34:40,545 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 20:34:40,545 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 20:34:40,545 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 20:34:40,549 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:34:40" (1/1) ... [2022-01-10 20:34:40,559 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:34:40" (1/1) ... [2022-01-10 20:34:40,580 INFO L137 Inliner]: procedures = 16, calls = 8, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 61 [2022-01-10 20:34:40,581 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 20:34:40,581 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 20:34:40,582 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 20:34:40,582 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 20:34:40,588 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:34:40" (1/1) ... [2022-01-10 20:34:40,588 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:34:40" (1/1) ... [2022-01-10 20:34:40,589 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:34:40" (1/1) ... [2022-01-10 20:34:40,590 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:34:40" (1/1) ... [2022-01-10 20:34:40,606 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:34:40" (1/1) ... [2022-01-10 20:34:40,609 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:34:40" (1/1) ... [2022-01-10 20:34:40,610 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:34:40" (1/1) ... [2022-01-10 20:34:40,611 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 20:34:40,612 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 20:34:40,612 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 20:34:40,612 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 20:34:40,617 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:34:40" (1/1) ... [2022-01-10 20:34:40,621 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 20:34:40,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 20:34:40,642 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 20:34:40,651 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 20:34:40,670 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 20:34:40,671 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 20:34:40,671 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 20:34:40,671 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 20:34:40,715 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 20:34:40,717 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 20:34:40,837 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 20:34:40,842 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 20:34:40,842 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-10 20:34:40,844 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:34:40 BoogieIcfgContainer [2022-01-10 20:34:40,844 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 20:34:40,845 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 20:34:40,845 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 20:34:40,846 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 20:34:40,849 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:34:40" (1/1) ... [2022-01-10 20:34:40,905 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 08:34:40 BasicIcfg [2022-01-10 20:34:40,905 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 20:34:40,906 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 20:34:40,906 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 20:34:40,908 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 20:34:40,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 08:34:40" (1/4) ... [2022-01-10 20:34:40,909 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17e212ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 08:34:40, skipping insertion in model container [2022-01-10 20:34:40,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:34:40" (2/4) ... [2022-01-10 20:34:40,910 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17e212ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 08:34:40, skipping insertion in model container [2022-01-10 20:34:40,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:34:40" (3/4) ... [2022-01-10 20:34:40,910 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17e212ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 08:34:40, skipping insertion in model container [2022-01-10 20:34:40,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 08:34:40" (4/4) ... [2022-01-10 20:34:40,911 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2_unwindbound20.iTransformedIcfg [2022-01-10 20:34:40,915 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 20:34:40,915 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-01-10 20:34:40,947 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 20:34:40,966 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 20:34:40,966 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-01-10 20:34:40,989 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 20:34:40,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-01-10 20:34:40,993 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:34:40,994 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-01-10 20:34:40,994 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:34:40,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:34:40,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1545003950, now seen corresponding path program 1 times [2022-01-10 20:34:41,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:34:41,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51312265] [2022-01-10 20:34:41,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:34:41,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:34:41,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:34:41,179 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 20:34:41,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:34:41,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51312265] [2022-01-10 20:34:41,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51312265] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 20:34:41,180 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 20:34:41,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 20:34:41,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412606987] [2022-01-10 20:34:41,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 20:34:41,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 20:34:41,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:34:41,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 20:34:41,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 20:34:41,214 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 20:34:41,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:34:41,227 INFO L93 Difference]: Finished difference Result 37 states and 50 transitions. [2022-01-10 20:34:41,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 20:34:41,229 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 20:34:41,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:34:41,235 INFO L225 Difference]: With dead ends: 37 [2022-01-10 20:34:41,235 INFO L226 Difference]: Without dead ends: 17 [2022-01-10 20:34:41,238 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 20:34:41,242 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 20:34:41,245 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 20:34:41,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-01-10 20:34:41,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-01-10 20:34:41,277 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 20:34:41,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-01-10 20:34:41,279 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 7 [2022-01-10 20:34:41,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:34:41,280 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-01-10 20:34:41,280 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 20:34:41,281 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-01-10 20:34:41,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-01-10 20:34:41,282 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:34:41,282 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 20:34:41,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 20:34:41,283 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:34:41,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:34:41,290 INFO L85 PathProgramCache]: Analyzing trace with hash 680866159, now seen corresponding path program 1 times [2022-01-10 20:34:41,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:34:41,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140908093] [2022-01-10 20:34:41,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:34:41,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:34:41,343 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-10 20:34:41,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1921890521] [2022-01-10 20:34:41,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:34:41,344 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:34:41,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 20:34:41,351 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 20:34:41,389 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 20:34:41,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:34:41,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 20:34:41,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 20:34:41,582 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 20:34:41,583 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 20:34:41,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:34:41,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140908093] [2022-01-10 20:34:41,583 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-10 20:34:41,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921890521] [2022-01-10 20:34:41,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921890521] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 20:34:41,584 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 20:34:41,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 20:34:41,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608731107] [2022-01-10 20:34:41,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 20:34:41,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 20:34:41,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:34:41,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 20:34:41,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 20:34:41,586 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 20:34:41,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:34:41,606 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2022-01-10 20:34:41,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 20:34:41,607 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 20:34:41,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:34:41,608 INFO L225 Difference]: With dead ends: 31 [2022-01-10 20:34:41,608 INFO L226 Difference]: Without dead ends: 19 [2022-01-10 20:34:41,609 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 20:34:41,611 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 20:34:41,612 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 20:34:41,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-01-10 20:34:41,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-01-10 20:34:41,624 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 20:34:41,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2022-01-10 20:34:41,624 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 8 [2022-01-10 20:34:41,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:34:41,625 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2022-01-10 20:34:41,625 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 20:34:41,625 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2022-01-10 20:34:41,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-01-10 20:34:41,625 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:34:41,625 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 20:34:41,647 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-10 20:34:41,840 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 20:34:41,841 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:34:41,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:34:41,842 INFO L85 PathProgramCache]: Analyzing trace with hash -333969099, now seen corresponding path program 1 times [2022-01-10 20:34:41,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:34:41,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524044406] [2022-01-10 20:34:41,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:34:41,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:34:41,871 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-10 20:34:41,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [176753538] [2022-01-10 20:34:41,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:34:41,872 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:34:41,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 20:34:41,873 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 20:34:41,876 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 20:34:41,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:34:41,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-10 20:34:41,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 20:34:42,210 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 20:34:42,210 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 20:34:42,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:34:42,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524044406] [2022-01-10 20:34:42,210 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-10 20:34:42,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176753538] [2022-01-10 20:34:42,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176753538] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 20:34:42,211 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 20:34:42,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 20:34:42,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896207281] [2022-01-10 20:34:42,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 20:34:42,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 20:34:42,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:34:42,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 20:34:42,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-10 20:34:42,213 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 20:34:42,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:34:42,381 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2022-01-10 20:34:42,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 20:34:42,382 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 20:34:42,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:34:42,383 INFO L225 Difference]: With dead ends: 38 [2022-01-10 20:34:42,383 INFO L226 Difference]: Without dead ends: 31 [2022-01-10 20:34:42,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-10 20:34:42,384 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 19 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 20:34:42,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 54 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 20:34:42,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-01-10 20:34:42,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2022-01-10 20:34:42,388 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 20:34:42,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2022-01-10 20:34:42,389 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 9 [2022-01-10 20:34:42,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:34:42,389 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2022-01-10 20:34:42,389 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 20:34:42,389 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2022-01-10 20:34:42,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-10 20:34:42,390 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:34:42,390 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 20:34:42,414 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 20:34:42,611 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 20:34:42,612 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:34:42,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:34:42,612 INFO L85 PathProgramCache]: Analyzing trace with hash 2004489561, now seen corresponding path program 1 times [2022-01-10 20:34:42,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:34:42,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284113618] [2022-01-10 20:34:42,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:34:42,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:34:42,629 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-10 20:34:42,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1720044301] [2022-01-10 20:34:42,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:34:42,630 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:34:42,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 20:34:42,633 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 20:34:42,648 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 20:34:42,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:34:42,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 20:34:42,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 20:34:42,898 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 20:34:42,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 20:34:43,020 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 20:34:43,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:34:43,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284113618] [2022-01-10 20:34:43,021 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-10 20:34:43,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720044301] [2022-01-10 20:34:43,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720044301] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 20:34:43,021 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 20:34:43,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-01-10 20:34:43,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763155596] [2022-01-10 20:34:43,022 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 20:34:43,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 20:34:43,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:34:43,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 20:34:43,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-01-10 20:34:43,023 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 20:34:43,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:34:43,158 INFO L93 Difference]: Finished difference Result 72 states and 89 transitions. [2022-01-10 20:34:43,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 20:34:43,159 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 20:34:43,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:34:43,160 INFO L225 Difference]: With dead ends: 72 [2022-01-10 20:34:43,160 INFO L226 Difference]: Without dead ends: 60 [2022-01-10 20:34:43,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-01-10 20:34:43,161 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 32 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 20:34:43,161 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 20:34:43,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-01-10 20:34:43,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 34. [2022-01-10 20:34:43,167 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 20:34:43,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2022-01-10 20:34:43,168 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 11 [2022-01-10 20:34:43,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:34:43,168 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2022-01-10 20:34:43,168 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 20:34:43,168 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2022-01-10 20:34:43,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-10 20:34:43,169 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:34:43,169 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 20:34:43,191 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-01-10 20:34:43,384 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 20:34:43,385 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:34:43,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:34:43,386 INFO L85 PathProgramCache]: Analyzing trace with hash 2043650699, now seen corresponding path program 1 times [2022-01-10 20:34:43,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:34:43,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302870119] [2022-01-10 20:34:43,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:34:43,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:34:43,403 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-10 20:34:43,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1001485515] [2022-01-10 20:34:43,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:34:43,404 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:34:43,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 20:34:43,405 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 20:34:43,407 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 20:34:43,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:34:43,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-10 20:34:43,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 20:34:43,675 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 20:34:43,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 20:34:43,894 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 20:34:43,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:34:43,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302870119] [2022-01-10 20:34:43,895 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-10 20:34:43,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001485515] [2022-01-10 20:34:43,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001485515] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 20:34:43,895 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 20:34:43,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-01-10 20:34:43,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071597535] [2022-01-10 20:34:43,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 20:34:43,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 20:34:43,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:34:43,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 20:34:43,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-10 20:34:43,897 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 20:34:43,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:34:43,929 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2022-01-10 20:34:43,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 20:34:43,930 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 20:34:43,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:34:43,931 INFO L225 Difference]: With dead ends: 45 [2022-01-10 20:34:43,931 INFO L226 Difference]: Without dead ends: 43 [2022-01-10 20:34:43,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-01-10 20:34:43,934 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, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 20:34:43,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 61 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 24 Unchecked, 0.0s Time] [2022-01-10 20:34:43,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-01-10 20:34:43,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2022-01-10 20:34:43,945 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 20:34:43,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2022-01-10 20:34:43,946 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 12 [2022-01-10 20:34:43,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:34:43,946 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2022-01-10 20:34:43,947 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 20:34:43,947 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2022-01-10 20:34:43,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-10 20:34:43,948 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:34:43,948 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 20:34:43,971 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-01-10 20:34:44,163 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 20:34:44,163 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:34:44,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:34:44,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1071374419, now seen corresponding path program 1 times [2022-01-10 20:34:44,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:34:44,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908637424] [2022-01-10 20:34:44,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:34:44,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:34:44,180 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-10 20:34:44,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1046241767] [2022-01-10 20:34:44,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:34:44,181 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:34:44,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 20:34:44,182 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 20:34:44,207 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 20:34:44,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:34:44,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-10 20:34:44,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 20:34:44,530 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 20:34:44,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 20:34:44,789 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 20:34:44,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:34:44,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908637424] [2022-01-10 20:34:44,790 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-10 20:34:44,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046241767] [2022-01-10 20:34:44,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046241767] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 20:34:44,790 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 20:34:44,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-01-10 20:34:44,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039667221] [2022-01-10 20:34:44,791 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 20:34:44,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-10 20:34:44,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:34:44,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-10 20:34:44,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-01-10 20:34:44,792 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 20:34:45,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:34:45,631 INFO L93 Difference]: Finished difference Result 96 states and 116 transitions. [2022-01-10 20:34:45,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-10 20:34:45,632 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 20:34:45,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:34:45,633 INFO L225 Difference]: With dead ends: 96 [2022-01-10 20:34:45,633 INFO L226 Difference]: Without dead ends: 92 [2022-01-10 20:34:45,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2022-01-10 20:34:45,634 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 62 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-10 20:34:45,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 187 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 28 Invalid, 0 Unknown, 17 Unchecked, 0.5s Time] [2022-01-10 20:34:45,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-01-10 20:34:45,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 75. [2022-01-10 20:34:45,642 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 20:34:45,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 94 transitions. [2022-01-10 20:34:45,643 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 94 transitions. Word has length 13 [2022-01-10 20:34:45,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:34:45,644 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 94 transitions. [2022-01-10 20:34:45,644 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 20:34:45,644 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 94 transitions. [2022-01-10 20:34:45,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-10 20:34:45,644 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:34:45,644 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 20:34:45,665 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 20:34:45,859 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 20:34:45,859 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:34:45,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:34:45,860 INFO L85 PathProgramCache]: Analyzing trace with hash -14955902, now seen corresponding path program 1 times [2022-01-10 20:34:45,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:34:45,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796029215] [2022-01-10 20:34:45,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:34:45,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:34:45,871 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-10 20:34:45,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [901911784] [2022-01-10 20:34:45,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:34:45,872 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:34:45,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 20:34:45,873 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 20:34:45,877 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 20:34:45,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:34:45,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 20:34:45,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 20:34:45,957 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 20:34:45,958 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 20:34:45,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:34:45,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796029215] [2022-01-10 20:34:45,958 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-10 20:34:45,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901911784] [2022-01-10 20:34:45,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901911784] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 20:34:45,958 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 20:34:45,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 20:34:45,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443906924] [2022-01-10 20:34:45,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 20:34:45,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 20:34:45,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:34:45,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 20:34:45,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 20:34:45,960 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 20:34:45,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:34:45,980 INFO L93 Difference]: Finished difference Result 96 states and 118 transitions. [2022-01-10 20:34:45,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 20:34:45,981 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 20:34:45,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:34:45,981 INFO L225 Difference]: With dead ends: 96 [2022-01-10 20:34:45,981 INFO L226 Difference]: Without dead ends: 46 [2022-01-10 20:34:45,982 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 20:34:45,983 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 20:34:45,983 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 20:34:45,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-01-10 20:34:45,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2022-01-10 20:34:45,997 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 20:34:45,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2022-01-10 20:34:45,998 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 15 [2022-01-10 20:34:45,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:34:45,998 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2022-01-10 20:34:45,998 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 20:34:45,998 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2022-01-10 20:34:45,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-10 20:34:45,999 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:34:45,999 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 20:34:46,017 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 20:34:46,204 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 20:34:46,205 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:34:46,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:34:46,205 INFO L85 PathProgramCache]: Analyzing trace with hash -288205120, now seen corresponding path program 1 times [2022-01-10 20:34:46,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:34:46,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997229259] [2022-01-10 20:34:46,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:34:46,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:34:46,217 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-10 20:34:46,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1815369880] [2022-01-10 20:34:46,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:34:46,217 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:34:46,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 20:34:46,219 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 20:34:46,222 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 20:34:46,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:34:46,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 20:34:46,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 20:34:46,301 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 20:34:46,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 20:34:46,330 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 20:34:46,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:34:46,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997229259] [2022-01-10 20:34:46,330 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-10 20:34:46,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815369880] [2022-01-10 20:34:46,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815369880] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 20:34:46,330 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 20:34:46,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2022-01-10 20:34:46,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393792129] [2022-01-10 20:34:46,331 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 20:34:46,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 20:34:46,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:34:46,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 20:34:46,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-10 20:34:46,332 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 20:34:46,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:34:46,376 INFO L93 Difference]: Finished difference Result 77 states and 87 transitions. [2022-01-10 20:34:46,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 20:34:46,377 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 20:34:46,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:34:46,377 INFO L225 Difference]: With dead ends: 77 [2022-01-10 20:34:46,377 INFO L226 Difference]: Without dead ends: 73 [2022-01-10 20:34:46,378 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 20:34:46,378 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 37 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 20:34:46,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 77 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 20:34:46,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-01-10 20:34:46,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 55. [2022-01-10 20:34:46,384 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 20:34:46,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 69 transitions. [2022-01-10 20:34:46,385 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 69 transitions. Word has length 16 [2022-01-10 20:34:46,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:34:46,385 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 69 transitions. [2022-01-10 20:34:46,385 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 20:34:46,386 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 69 transitions. [2022-01-10 20:34:46,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-10 20:34:46,386 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:34:46,386 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 20:34:46,412 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 20:34:46,602 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 20:34:46,602 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:34:46,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:34:46,603 INFO L85 PathProgramCache]: Analyzing trace with hash -2041279656, now seen corresponding path program 1 times [2022-01-10 20:34:46,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:34:46,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146062163] [2022-01-10 20:34:46,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:34:46,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:34:46,615 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-10 20:34:46,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1246378672] [2022-01-10 20:34:46,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:34:46,615 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:34:46,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 20:34:46,621 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 20:34:46,622 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 20:34:46,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:34:46,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-10 20:34:46,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 20:34:47,115 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 20:34:47,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 20:34:47,952 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 20:34:47,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:34:47,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146062163] [2022-01-10 20:34:47,952 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-10 20:34:47,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246378672] [2022-01-10 20:34:47,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246378672] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 20:34:47,953 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 20:34:47,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2022-01-10 20:34:47,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912699963] [2022-01-10 20:34:47,953 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 20:34:47,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-10 20:34:47,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:34:47,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-10 20:34:47,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-01-10 20:34:47,954 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 20:34:57,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:34:57,957 INFO L93 Difference]: Finished difference Result 75 states and 93 transitions. [2022-01-10 20:34:57,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-10 20:34:57,958 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 20:34:57,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:34:57,958 INFO L225 Difference]: With dead ends: 75 [2022-01-10 20:34:57,958 INFO L226 Difference]: Without dead ends: 73 [2022-01-10 20:34:57,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=133, Invalid=283, Unknown=4, NotChecked=0, Total=420 [2022-01-10 20:34:57,959 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 55 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 20:34:57,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 140 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 44 Invalid, 0 Unknown, 82 Unchecked, 0.1s Time] [2022-01-10 20:34:57,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-01-10 20:34:57,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 64. [2022-01-10 20:34:57,966 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 20:34:57,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 80 transitions. [2022-01-10 20:34:57,967 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 80 transitions. Word has length 18 [2022-01-10 20:34:57,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:34:57,967 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 80 transitions. [2022-01-10 20:34:57,968 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 20:34:57,968 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 80 transitions. [2022-01-10 20:34:57,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-10 20:34:57,968 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:34:57,968 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 20:34:57,976 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 20:34:58,173 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 20:34:58,173 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:34:58,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:34:58,174 INFO L85 PathProgramCache]: Analyzing trace with hash -2040356135, now seen corresponding path program 1 times [2022-01-10 20:34:58,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:34:58,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110096591] [2022-01-10 20:34:58,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:34:58,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:34:58,194 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-10 20:34:58,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [893662146] [2022-01-10 20:34:58,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:34:58,195 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:34:58,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 20:34:58,202 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 20:34:58,203 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 20:34:58,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:34:58,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 20:34:58,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 20:35:02,603 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 20:35:02,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 20:35:15,628 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 20:35:15,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:35:15,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110096591] [2022-01-10 20:35:15,629 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-10 20:35:15,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893662146] [2022-01-10 20:35:15,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893662146] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 20:35:15,629 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 20:35:15,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-01-10 20:35:15,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401432045] [2022-01-10 20:35:15,629 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 20:35:15,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 20:35:15,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:35:15,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 20:35:15,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=36, Unknown=4, NotChecked=0, Total=56 [2022-01-10 20:35:15,630 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 20:35:20,093 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_ULTIMATE.start_main_~b~0#1Int_17| Int)) (and (<= 1 |v_ULTIMATE.start_ULTIMATE.start_main_~b~0#1Int_17|) (<= |v_ULTIMATE.start_ULTIMATE.start_main_~b~0#1Int_17| |c_ULTIMATE.start_ULTIMATE.start_main_~r~0#1Int|) (= (mod (* 2 |v_ULTIMATE.start_ULTIMATE.start_main_~b~0#1Int_17|) 4294967296) |c_ULTIMATE.start_ULTIMATE.start_main_~b~0#1Int|))) (<= (div (mod (* 2 |c_ULTIMATE.start_ULTIMATE.start_main_~b~0#1Int|) 4294967296) 2) |c_ULTIMATE.start_ULTIMATE.start_main_~b~0#1Int|)) is different from false [2022-01-10 20:35:22,229 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_ULTIMATE.start_main_~b~0#1Int_17| Int)) (and (<= 1 |v_ULTIMATE.start_ULTIMATE.start_main_~b~0#1Int_17|) (<= |v_ULTIMATE.start_ULTIMATE.start_main_~b~0#1Int_17| |c_ULTIMATE.start_ULTIMATE.start_main_~r~0#1Int|) (= (mod (* 2 |v_ULTIMATE.start_ULTIMATE.start_main_~b~0#1Int_17|) 4294967296) |c_ULTIMATE.start_ULTIMATE.start_main_~b~0#1Int|))) (<= (div (mod (* 2 |c_ULTIMATE.start_ULTIMATE.start_main_~b~0#1Int|) 4294967296) 2) |c_ULTIMATE.start_ULTIMATE.start_main_~b~0#1Int|)) is different from true [2022-01-10 20:35:24,243 WARN L534 Checker$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 20:35:34,957 WARN L228 SmtUtils]: Spent 6.53s on a formula simplification. DAG size of input: 12 DAG size of output: 10 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-10 20:35:36,961 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-10 20:35:43,180 WARN L534 Checker$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 20:35:45,317 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-10 20:35:47,529 WARN L534 Checker$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 20:35:49,676 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 20:35:49,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:35:49,812 INFO L93 Difference]: Finished difference Result 103 states and 120 transitions. [2022-01-10 20:35:49,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 20:35:49,817 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 20:35:49,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:35:49,817 INFO L225 Difference]: With dead ends: 103 [2022-01-10 20:35:49,817 INFO L226 Difference]: Without dead ends: 83 [2022-01-10 20:35:49,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 34.1s TimeCoverageRelationStatistics Valid=34, Invalid=71, Unknown=9, NotChecked=18, Total=132 [2022-01-10 20:35:49,818 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 37 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 13 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 12.9s IncrementalHoareTripleChecker+Time [2022-01-10 20:35:49,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 141 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 48 Invalid, 6 Unknown, 49 Unchecked, 12.9s Time] [2022-01-10 20:35:49,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-01-10 20:35:49,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 59. [2022-01-10 20:35:49,827 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 20:35:49,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2022-01-10 20:35:49,828 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 18 [2022-01-10 20:35:49,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:35:49,828 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2022-01-10 20:35:49,828 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 20:35:49,828 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2022-01-10 20:35:49,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-10 20:35:49,829 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:35:49,829 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 20:35:49,841 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 20:35:50,037 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 20:35:50,038 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:35:50,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:35:50,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1144803456, now seen corresponding path program 1 times [2022-01-10 20:35:50,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:35:50,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546197511] [2022-01-10 20:35:50,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:35:50,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:35:50,050 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-10 20:35:50,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1212672567] [2022-01-10 20:35:50,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:35:50,050 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:35:50,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 20:35:50,060 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 20:35:50,063 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 20:35:50,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:35:50,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-10 20:35:50,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 20:35:54,857 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 20:35:54,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 20:35:57,214 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 20:35:57,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:35:57,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546197511] [2022-01-10 20:35:57,214 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-10 20:35:57,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212672567] [2022-01-10 20:35:57,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212672567] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 20:35:57,215 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 20:35:57,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-01-10 20:35:57,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101651335] [2022-01-10 20:35:57,215 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 20:35:57,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-10 20:35:57,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:35:57,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-10 20:35:57,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-01-10 20:35:57,216 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 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)