/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/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-24 00:00:07,820 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-24 00:00:07,821 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-24 00:00:07,860 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-24 00:00:07,860 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-24 00:00:07,863 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-24 00:00:07,865 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-24 00:00:07,869 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-24 00:00:07,871 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-24 00:00:07,875 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-24 00:00:07,875 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-24 00:00:07,876 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-24 00:00:07,876 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-24 00:00:07,877 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-24 00:00:07,877 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-24 00:00:07,878 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-24 00:00:07,878 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-24 00:00:07,879 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-24 00:00:07,879 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-24 00:00:07,880 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-24 00:00:07,881 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-24 00:00:07,885 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-24 00:00:07,888 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-24 00:00:07,890 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-24 00:00:07,894 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-24 00:00:07,902 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-24 00:00:07,902 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-24 00:00:07,903 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-24 00:00:07,904 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-02-24 00:00:07,928 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-24 00:00:07,928 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-24 00:00:07,929 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-24 00:00:07,929 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-24 00:00:07,930 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-24 00:00:07,930 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-24 00:00:07,930 INFO L138 SettingsManager]: * Use SBE=true [2022-02-24 00:00:07,931 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-24 00:00:07,931 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-24 00:00:07,931 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-24 00:00:07,931 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-24 00:00:07,932 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-24 00:00:07,932 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-24 00:00:07,932 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-24 00:00:07,932 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-24 00:00:07,932 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-24 00:00:07,932 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-24 00:00:07,932 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-24 00:00:07,932 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-24 00:00:07,932 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 00:00:07,932 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-24 00:00:07,932 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-24 00:00:07,933 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-24 00:00:07,933 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-24 00:00:07,933 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-24 00:00:07,933 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-24 00:00:07,933 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-02-24 00:00:07,933 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-02-24 00:00:07,934 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-24 00:00:07,934 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-24 00:00:08,146 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-24 00:00:08,176 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-24 00:00:08,177 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-24 00:00:08,178 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-24 00:00:08,180 INFO L275 PluginConnector]: CDTParser initialized [2022-02-24 00:00:08,180 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound10.c [2022-02-24 00:00:08,229 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2eb72829/30ebb2cdb1824fa3b780eb84324693a0/FLAG6c56a086a [2022-02-24 00:00:08,662 INFO L306 CDTParser]: Found 1 translation units. [2022-02-24 00:00:08,663 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound10.c [2022-02-24 00:00:08,667 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2eb72829/30ebb2cdb1824fa3b780eb84324693a0/FLAG6c56a086a [2022-02-24 00:00:09,106 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2eb72829/30ebb2cdb1824fa3b780eb84324693a0 [2022-02-24 00:00:09,108 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-24 00:00:09,109 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-24 00:00:09,112 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-24 00:00:09,112 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-24 00:00:09,115 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-24 00:00:09,115 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 12:00:09" (1/1) ... [2022-02-24 00:00:09,138 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cbaa0f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:00:09, skipping insertion in model container [2022-02-24 00:00:09,138 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 12:00:09" (1/1) ... [2022-02-24 00:00:09,143 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-24 00:00:09,151 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-24 00:00:09,247 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/prodbin-ll_unwindbound10.c[537,550] [2022-02-24 00:00:09,273 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 00:00:09,293 INFO L203 MainTranslator]: Completed pre-run [2022-02-24 00:00:09,301 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/prodbin-ll_unwindbound10.c[537,550] [2022-02-24 00:00:09,304 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 00:00:09,318 INFO L208 MainTranslator]: Completed translation [2022-02-24 00:00:09,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:00:09 WrapperNode [2022-02-24 00:00:09,319 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-24 00:00:09,321 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-24 00:00:09,321 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-24 00:00:09,321 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-24 00:00:09,328 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:00:09" (1/1) ... [2022-02-24 00:00:09,329 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:00:09" (1/1) ... [2022-02-24 00:00:09,333 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:00:09" (1/1) ... [2022-02-24 00:00:09,333 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:00:09" (1/1) ... [2022-02-24 00:00:09,336 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:00:09" (1/1) ... [2022-02-24 00:00:09,339 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:00:09" (1/1) ... [2022-02-24 00:00:09,339 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:00:09" (1/1) ... [2022-02-24 00:00:09,341 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-24 00:00:09,341 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-24 00:00:09,341 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-24 00:00:09,341 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-24 00:00:09,343 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:00:09" (1/1) ... [2022-02-24 00:00:09,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 00:00:09,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 00:00:09,366 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-24 00:00:09,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-24 00:00:09,393 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-24 00:00:09,393 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-24 00:00:09,393 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-24 00:00:09,393 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-24 00:00:09,393 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-24 00:00:09,393 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-24 00:00:09,394 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-24 00:00:09,394 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-24 00:00:09,394 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-24 00:00:09,394 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-24 00:00:09,394 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-24 00:00:09,394 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-24 00:00:09,394 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-24 00:00:09,394 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-24 00:00:09,394 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-24 00:00:09,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-24 00:00:09,394 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-24 00:00:09,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-24 00:00:09,395 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-24 00:00:09,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-24 00:00:09,438 INFO L234 CfgBuilder]: Building ICFG [2022-02-24 00:00:09,439 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-24 00:00:09,533 INFO L275 CfgBuilder]: Performing block encoding [2022-02-24 00:00:09,552 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-24 00:00:09,552 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-24 00:00:09,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:00:09 BoogieIcfgContainer [2022-02-24 00:00:09,554 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-24 00:00:09,555 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-24 00:00:09,555 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-24 00:00:09,556 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-24 00:00:09,558 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:00:09" (1/1) ... [2022-02-24 00:00:09,579 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 24.02 12:00:09 BasicIcfg [2022-02-24 00:00:09,580 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-24 00:00:09,581 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-24 00:00:09,581 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-24 00:00:09,583 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-24 00:00:09,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 12:00:09" (1/4) ... [2022-02-24 00:00:09,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a973922 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 12:00:09, skipping insertion in model container [2022-02-24 00:00:09,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:00:09" (2/4) ... [2022-02-24 00:00:09,586 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a973922 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 12:00:09, skipping insertion in model container [2022-02-24 00:00:09,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:00:09" (3/4) ... [2022-02-24 00:00:09,586 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a973922 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 12:00:09, skipping insertion in model container [2022-02-24 00:00:09,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 24.02 12:00:09" (4/4) ... [2022-02-24 00:00:09,587 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_unwindbound10.cqvasr [2022-02-24 00:00:09,593 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-24 00:00:09,594 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-24 00:00:09,636 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-24 00:00:09,642 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=FINITE_AUTOMATA, 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 [2022-02-24 00:00:09,643 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-24 00:00:09,664 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-24 00:00:09,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-24 00:00:09,667 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:00:09,668 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:00:09,668 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:00:09,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:00:09,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1957529129, now seen corresponding path program 1 times [2022-02-24 00:00:09,678 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:00:09,679 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155502393] [2022-02-24 00:00:09,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:00:09,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:00:09,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:00:09,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 00:00:09,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:00:09,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 00:00:09,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:00:09,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 00:00:09,868 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:00:09,868 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155502393] [2022-02-24 00:00:09,868 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155502393] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 00:00:09,868 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 00:00:09,869 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-24 00:00:09,870 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633886957] [2022-02-24 00:00:09,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 00:00:09,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-24 00:00:09,903 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:00:09,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-24 00:00:09,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-24 00:00:09,943 INFO L87 Difference]: Start difference. First operand has 30 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-24 00:00:10,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:00:10,007 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2022-02-24 00:00:10,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-24 00:00:10,009 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-02-24 00:00:10,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:00:10,016 INFO L225 Difference]: With dead ends: 52 [2022-02-24 00:00:10,016 INFO L226 Difference]: Without dead ends: 26 [2022-02-24 00:00:10,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-24 00:00:10,022 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 00:00:10,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 35 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 00:00:10,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-02-24 00:00:10,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-02-24 00:00:10,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 00:00:10,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-02-24 00:00:10,054 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2022-02-24 00:00:10,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:00:10,055 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-02-24 00:00:10,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-24 00:00:10,055 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-02-24 00:00:10,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-24 00:00:10,056 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:00:10,056 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:00:10,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-24 00:00:10,057 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:00:10,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:00:10,057 INFO L85 PathProgramCache]: Analyzing trace with hash 583261658, now seen corresponding path program 1 times [2022-02-24 00:00:10,058 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:00:10,058 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341266557] [2022-02-24 00:00:10,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:00:10,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:00:10,084 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-24 00:00:10,085 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1902059109] [2022-02-24 00:00:10,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:00:10,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-24 00:00:10,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 00:00:10,087 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) [2022-02-24 00:00:10,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-24 00:00:10,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:00:10,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-24 00:00:10,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-24 00:00:10,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 00:00:10,192 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-24 00:00:10,192 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:00:10,192 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341266557] [2022-02-24 00:00:10,193 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-24 00:00:10,193 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902059109] [2022-02-24 00:00:10,193 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902059109] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 00:00:10,193 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 00:00:10,193 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 00:00:10,194 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357954000] [2022-02-24 00:00:10,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 00:00:10,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 00:00:10,194 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:00:10,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 00:00:10,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 00:00:10,195 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 00:00:10,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:00:10,203 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2022-02-24 00:00:10,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 00:00:10,203 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-02-24 00:00:10,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:00:10,204 INFO L225 Difference]: With dead ends: 34 [2022-02-24 00:00:10,204 INFO L226 Difference]: Without dead ends: 27 [2022-02-24 00:00:10,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 00:00:10,205 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 00:00:10,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 66 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 00:00:10,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-02-24 00:00:10,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-02-24 00:00:10,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 00:00:10,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-02-24 00:00:10,210 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 18 [2022-02-24 00:00:10,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:00:10,210 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-02-24 00:00:10,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 00:00:10,210 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-02-24 00:00:10,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-24 00:00:10,211 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:00:10,211 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:00:10,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-24 00:00:10,432 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 [2022-02-24 00:00:10,432 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:00:10,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:00:10,433 INFO L85 PathProgramCache]: Analyzing trace with hash 584363925, now seen corresponding path program 1 times [2022-02-24 00:00:10,433 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:00:10,433 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348714709] [2022-02-24 00:00:10,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:00:10,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:00:10,450 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-24 00:00:10,450 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1954031977] [2022-02-24 00:00:10,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:00:10,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-24 00:00:10,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 00:00:10,466 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) [2022-02-24 00:00:10,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-24 00:00:10,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:00:10,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-24 00:00:10,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-24 00:00:10,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 00:00:10,606 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-24 00:00:10,606 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:00:10,606 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348714709] [2022-02-24 00:00:10,606 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-24 00:00:10,606 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954031977] [2022-02-24 00:00:10,606 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954031977] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 00:00:10,606 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 00:00:10,606 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-24 00:00:10,607 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796230277] [2022-02-24 00:00:10,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 00:00:10,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-24 00:00:10,607 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:00:10,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-24 00:00:10,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-24 00:00:10,608 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-24 00:00:10,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:00:10,653 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2022-02-24 00:00:10,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-24 00:00:10,654 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-02-24 00:00:10,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:00:10,655 INFO L225 Difference]: With dead ends: 38 [2022-02-24 00:00:10,655 INFO L226 Difference]: Without dead ends: 36 [2022-02-24 00:00:10,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-24 00:00:10,656 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 8 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 00:00:10,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 83 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 00:00:10,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-02-24 00:00:10,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2022-02-24 00:00:10,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-24 00:00:10,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2022-02-24 00:00:10,661 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 18 [2022-02-24 00:00:10,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:00:10,662 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2022-02-24 00:00:10,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-24 00:00:10,662 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2022-02-24 00:00:10,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-24 00:00:10,662 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:00:10,662 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:00:10,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-24 00:00:10,881 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 [2022-02-24 00:00:10,882 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:00:10,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:00:10,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1698322804, now seen corresponding path program 1 times [2022-02-24 00:00:10,882 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:00:10,882 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958460103] [2022-02-24 00:00:10,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:00:10,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:00:10,891 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-24 00:00:10,891 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1913124060] [2022-02-24 00:00:10,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:00:10,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-24 00:00:10,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 00:00:10,892 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) [2022-02-24 00:00:10,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-24 00:00:10,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:00:10,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-24 00:00:10,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-24 00:00:10,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 00:00:10,992 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-24 00:00:10,992 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:00:10,992 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958460103] [2022-02-24 00:00:10,992 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-24 00:00:10,992 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913124060] [2022-02-24 00:00:10,992 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913124060] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 00:00:10,992 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 00:00:10,992 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 00:00:10,992 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633315509] [2022-02-24 00:00:10,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 00:00:10,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 00:00:10,993 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:00:10,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 00:00:10,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-24 00:00:10,994 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-24 00:00:11,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:00:11,023 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2022-02-24 00:00:11,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-24 00:00:11,024 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-02-24 00:00:11,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:00:11,024 INFO L225 Difference]: With dead ends: 42 [2022-02-24 00:00:11,024 INFO L226 Difference]: Without dead ends: 35 [2022-02-24 00:00:11,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-02-24 00:00:11,025 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 17 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 00:00:11,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 97 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 00:00:11,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-02-24 00:00:11,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2022-02-24 00:00:11,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-24 00:00:11,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2022-02-24 00:00:11,029 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 24 [2022-02-24 00:00:11,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:00:11,029 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2022-02-24 00:00:11,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-24 00:00:11,030 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2022-02-24 00:00:11,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-24 00:00:11,030 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:00:11,030 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:00:11,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-24 00:00:11,243 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 [2022-02-24 00:00:11,244 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:00:11,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:00:11,244 INFO L85 PathProgramCache]: Analyzing trace with hash 919545147, now seen corresponding path program 1 times [2022-02-24 00:00:11,244 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:00:11,244 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400906442] [2022-02-24 00:00:11,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:00:11,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:00:11,252 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-24 00:00:11,253 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1150982883] [2022-02-24 00:00:11,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:00:11,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-24 00:00:11,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 00:00:11,254 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) [2022-02-24 00:00:11,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-24 00:00:11,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:00:11,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-24 00:00:11,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-24 00:00:11,339 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 00:00:11,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-24 00:00:11,403 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 00:00:11,404 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:00:11,404 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400906442] [2022-02-24 00:00:11,404 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-24 00:00:11,404 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150982883] [2022-02-24 00:00:11,404 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150982883] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-24 00:00:11,404 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-24 00:00:11,404 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-02-24 00:00:11,404 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553334003] [2022-02-24 00:00:11,404 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-24 00:00:11,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 00:00:11,405 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:00:11,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 00:00:11,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-02-24 00:00:11,405 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-02-24 00:00:11,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:00:11,449 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2022-02-24 00:00:11,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-24 00:00:11,449 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 28 [2022-02-24 00:00:11,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:00:11,450 INFO L225 Difference]: With dead ends: 70 [2022-02-24 00:00:11,450 INFO L226 Difference]: Without dead ends: 63 [2022-02-24 00:00:11,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-02-24 00:00:11,451 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 42 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 00:00:11,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 105 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 00:00:11,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-02-24 00:00:11,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2022-02-24 00:00:11,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 45 states have internal predecessors, (53), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-24 00:00:11,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2022-02-24 00:00:11,457 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 28 [2022-02-24 00:00:11,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:00:11,457 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2022-02-24 00:00:11,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-02-24 00:00:11,457 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2022-02-24 00:00:11,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-24 00:00:11,458 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:00:11,458 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:00:11,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-24 00:00:11,674 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 [2022-02-24 00:00:11,674 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:00:11,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:00:11,675 INFO L85 PathProgramCache]: Analyzing trace with hash 920647414, now seen corresponding path program 1 times [2022-02-24 00:00:11,675 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:00:11,675 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113710039] [2022-02-24 00:00:11,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:00:11,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:00:11,682 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-24 00:00:11,682 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1478412483] [2022-02-24 00:00:11,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:00:11,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-24 00:00:11,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 00:00:11,684 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) [2022-02-24 00:00:11,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-24 00:00:11,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:00:11,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-24 00:00:11,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-24 00:00:14,529 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 00:00:14,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-24 00:00:25,779 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 00:00:25,779 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:00:25,779 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113710039] [2022-02-24 00:00:25,779 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-24 00:00:25,780 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478412483] [2022-02-24 00:00:25,780 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478412483] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-24 00:00:25,780 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-24 00:00:25,780 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2022-02-24 00:00:25,780 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054849870] [2022-02-24 00:00:25,780 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-24 00:00:25,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 00:00:25,781 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:00:25,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 00:00:25,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=142, Unknown=1, NotChecked=0, Total=182 [2022-02-24 00:00:25,782 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-24 00:00:28,557 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 [] [2022-02-24 00:00:30,559 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 [] [2022-02-24 00:00:40,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:00:40,142 INFO L93 Difference]: Finished difference Result 94 states and 109 transitions. [2022-02-24 00:00:40,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 00:00:40,143 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-02-24 00:00:40,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:00:40,146 INFO L225 Difference]: With dead ends: 94 [2022-02-24 00:00:40,147 INFO L226 Difference]: Without dead ends: 92 [2022-02-24 00:00:40,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 19.0s TimeCoverageRelationStatistics Valid=73, Invalid=266, Unknown=3, NotChecked=0, Total=342 [2022-02-24 00:00:40,147 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 36 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 21 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-02-24 00:00:40,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 202 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 157 Invalid, 2 Unknown, 0 Unchecked, 5.9s Time] [2022-02-24 00:00:40,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-02-24 00:00:40,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 88. [2022-02-24 00:00:40,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 70 states have internal predecessors, (79), 13 states have call successors, (13), 10 states have call predecessors, (13), 9 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-24 00:00:40,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 101 transitions. [2022-02-24 00:00:40,156 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 101 transitions. Word has length 28 [2022-02-24 00:00:40,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:00:40,156 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 101 transitions. [2022-02-24 00:00:40,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-24 00:00:40,156 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 101 transitions. [2022-02-24 00:00:40,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-24 00:00:40,157 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:00:40,157 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:00:40,176 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-02-24 00:00:40,362 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 [2022-02-24 00:00:40,363 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:00:40,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:00:40,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1631509547, now seen corresponding path program 1 times [2022-02-24 00:00:40,363 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:00:40,363 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646447769] [2022-02-24 00:00:40,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:00:40,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:00:40,370 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-24 00:00:40,370 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1016250034] [2022-02-24 00:00:40,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:00:40,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-24 00:00:40,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 00:00:40,396 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) [2022-02-24 00:00:40,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-24 00:00:40,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:00:40,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-24 00:00:40,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-24 00:00:43,340 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 00:00:43,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-24 00:00:43,977 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 00:00:43,977 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:00:43,978 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646447769] [2022-02-24 00:00:43,978 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-24 00:00:43,978 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016250034] [2022-02-24 00:00:43,978 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016250034] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-24 00:00:43,978 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-24 00:00:43,978 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2022-02-24 00:00:43,978 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280172918] [2022-02-24 00:00:43,978 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-24 00:00:43,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-24 00:00:43,979 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:00:43,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-24 00:00:43,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-02-24 00:00:43,979 INFO L87 Difference]: Start difference. First operand 88 states and 101 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 17 states have internal predecessors, (32), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-24 00:00:45,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:00:45,145 INFO L93 Difference]: Finished difference Result 123 states and 138 transitions. [2022-02-24 00:00:45,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 00:00:45,146 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 17 states have internal predecessors, (32), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 28 [2022-02-24 00:00:45,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:00:45,147 INFO L225 Difference]: With dead ends: 123 [2022-02-24 00:00:45,147 INFO L226 Difference]: Without dead ends: 112 [2022-02-24 00:00:45,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2022-02-24 00:00:45,148 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 53 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 00:00:45,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 211 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 00:00:45,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-02-24 00:00:45,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 91. [2022-02-24 00:00:45,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 69 states have (on average 1.1884057971014492) internal successors, (82), 71 states have internal predecessors, (82), 12 states have call successors, (12), 11 states have call predecessors, (12), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-24 00:00:45,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 103 transitions. [2022-02-24 00:00:45,158 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 103 transitions. Word has length 28 [2022-02-24 00:00:45,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:00:45,159 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 103 transitions. [2022-02-24 00:00:45,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 17 states have internal predecessors, (32), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-24 00:00:45,159 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 103 transitions. [2022-02-24 00:00:45,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-24 00:00:45,160 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:00:45,160 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:00:45,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-24 00:00:45,379 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 [2022-02-24 00:00:45,380 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:00:45,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:00:45,380 INFO L85 PathProgramCache]: Analyzing trace with hash -357510123, now seen corresponding path program 1 times [2022-02-24 00:00:45,380 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:00:45,380 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536435637] [2022-02-24 00:00:45,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:00:45,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:00:45,388 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-24 00:00:45,388 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [852087688] [2022-02-24 00:00:45,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:00:45,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-24 00:00:45,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 00:00:45,394 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) [2022-02-24 00:00:45,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-24 00:00:45,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:00:45,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-24 00:00:45,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-24 00:00:45,568 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-24 00:00:45,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-24 00:00:45,797 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-24 00:00:45,797 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:00:45,797 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536435637] [2022-02-24 00:00:45,797 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-24 00:00:45,797 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852087688] [2022-02-24 00:00:45,798 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852087688] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-24 00:00:45,798 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-24 00:00:45,798 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-02-24 00:00:45,798 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961409474] [2022-02-24 00:00:45,798 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-24 00:00:45,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 00:00:45,798 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:00:45,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 00:00:45,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-02-24 00:00:45,799 INFO L87 Difference]: Start difference. First operand 91 states and 103 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-24 00:00:47,804 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 [] [2022-02-24 00:00:47,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:00:47,982 INFO L93 Difference]: Finished difference Result 100 states and 111 transitions. [2022-02-24 00:00:47,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 00:00:47,982 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2022-02-24 00:00:47,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:00:47,983 INFO L225 Difference]: With dead ends: 100 [2022-02-24 00:00:47,983 INFO L226 Difference]: Without dead ends: 90 [2022-02-24 00:00:47,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-02-24 00:00:47,984 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 15 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-02-24 00:00:47,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 114 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 63 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-02-24 00:00:47,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-02-24 00:00:47,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2022-02-24 00:00:47,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 67 states have (on average 1.1343283582089552) internal successors, (76), 69 states have internal predecessors, (76), 11 states have call successors, (11), 10 states have call predecessors, (11), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-24 00:00:47,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 96 transitions. [2022-02-24 00:00:47,993 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 96 transitions. Word has length 34 [2022-02-24 00:00:47,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:00:47,993 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 96 transitions. [2022-02-24 00:00:47,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-24 00:00:47,993 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 96 transitions. [2022-02-24 00:00:47,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-24 00:00:47,994 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:00:47,994 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:00:48,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-24 00:00:48,194 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 [2022-02-24 00:00:48,195 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:00:48,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:00:48,195 INFO L85 PathProgramCache]: Analyzing trace with hash 199111383, now seen corresponding path program 1 times [2022-02-24 00:00:48,195 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:00:48,195 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122549444] [2022-02-24 00:00:48,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:00:48,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:00:48,202 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-24 00:00:48,202 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1244742465] [2022-02-24 00:00:48,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:00:48,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-24 00:00:48,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 00:00:48,210 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) [2022-02-24 00:00:48,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-24 00:00:48,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:00:48,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 42 conjunts are in the unsatisfiable core [2022-02-24 00:00:48,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-24 00:00:51,814 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-24 00:01:10,315 WARN L232 SmtUtils]: Spent 11.57s on a formula simplification that was a NOOP. DAG size: 63 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-24 00:01:21,066 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-24 00:01:21,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-24 00:01:26,018 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-24 00:01:32,280 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 29 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-02-24 00:01:32,280 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:01:32,280 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122549444] [2022-02-24 00:01:32,280 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-24 00:01:32,280 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244742465] [2022-02-24 00:01:32,280 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244742465] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-24 00:01:32,280 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-24 00:01:32,280 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11] total 24 [2022-02-24 00:01:32,282 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877053563] [2022-02-24 00:01:32,282 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-24 00:01:32,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-24 00:01:32,283 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:01:32,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-24 00:01:32,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=456, Unknown=2, NotChecked=0, Total=552 [2022-02-24 00:01:32,283 INFO L87 Difference]: Start difference. First operand 88 states and 96 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 22 states have internal predecessors, (50), 7 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-02-24 00:02:49,056 WARN L232 SmtUtils]: Spent 1.11m on a formula simplification. DAG size of input: 68 DAG size of output: 60 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-24 00:02:50,684 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-24 00:02:52,120 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-24 00:02:53,773 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-24 00:03:07,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:03:07,828 INFO L93 Difference]: Finished difference Result 121 states and 134 transitions. [2022-02-24 00:03:07,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-24 00:03:07,829 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 22 states have internal predecessors, (50), 7 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 48 [2022-02-24 00:03:07,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:03:07,830 INFO L225 Difference]: With dead ends: 121 [2022-02-24 00:03:07,830 INFO L226 Difference]: Without dead ends: 119 [2022-02-24 00:03:07,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 74 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 112.1s TimeCoverageRelationStatistics Valid=178, Invalid=936, Unknown=8, NotChecked=0, Total=1122 [2022-02-24 00:03:07,831 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 58 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2022-02-24 00:03:07,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 282 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 246 Invalid, 0 Unknown, 40 Unchecked, 7.6s Time] [2022-02-24 00:03:07,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-02-24 00:03:07,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 116. [2022-02-24 00:03:07,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 89 states have (on average 1.1348314606741574) internal successors, (101), 93 states have internal predecessors, (101), 15 states have call successors, (15), 12 states have call predecessors, (15), 11 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2022-02-24 00:03:07,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 129 transitions. [2022-02-24 00:03:07,854 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 129 transitions. Word has length 48 [2022-02-24 00:03:07,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:03:07,854 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 129 transitions. [2022-02-24 00:03:07,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 22 states have internal predecessors, (50), 7 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-02-24 00:03:07,854 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 129 transitions. [2022-02-24 00:03:07,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-24 00:03:07,856 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:03:07,856 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:03:07,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-24 00:03:08,057 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 [2022-02-24 00:03:08,057 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:03:08,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:03:08,058 INFO L85 PathProgramCache]: Analyzing trace with hash -831185954, now seen corresponding path program 2 times [2022-02-24 00:03:08,058 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:03:08,058 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648690753] [2022-02-24 00:03:08,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:03:08,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:03:08,066 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-24 00:03:08,067 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1180504177] [2022-02-24 00:03:08,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-24 00:03:08,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-24 00:03:08,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 00:03:08,092 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) [2022-02-24 00:03:08,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-24 00:03:08,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-24 00:03:08,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-24 00:03:08,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-24 00:03:08,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-24 00:03:08,326 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 00:03:08,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-24 00:03:08,526 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 44 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-24 00:03:08,526 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:03:08,526 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648690753] [2022-02-24 00:03:08,526 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-24 00:03:08,526 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180504177] [2022-02-24 00:03:08,527 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180504177] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-24 00:03:08,527 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-24 00:03:08,527 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-02-24 00:03:08,527 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3798584] [2022-02-24 00:03:08,527 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-24 00:03:08,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 00:03:08,527 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:03:08,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 00:03:08,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-02-24 00:03:08,528 INFO L87 Difference]: Start difference. First operand 116 states and 129 transitions. Second operand has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 12 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2022-02-24 00:03:08,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:03:08,740 INFO L93 Difference]: Finished difference Result 296 states and 338 transitions. [2022-02-24 00:03:08,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-24 00:03:08,740 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 12 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) Word has length 58 [2022-02-24 00:03:08,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:03:08,742 INFO L225 Difference]: With dead ends: 296 [2022-02-24 00:03:08,742 INFO L226 Difference]: Without dead ends: 289 [2022-02-24 00:03:08,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2022-02-24 00:03:08,743 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 110 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 00:03:08,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 199 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 00:03:08,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-02-24 00:03:08,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 279. [2022-02-24 00:03:08,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 218 states have (on average 1.1330275229357798) internal successors, (247), 227 states have internal predecessors, (247), 32 states have call successors, (32), 29 states have call predecessors, (32), 28 states have return successors, (30), 22 states have call predecessors, (30), 30 states have call successors, (30) [2022-02-24 00:03:08,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 309 transitions. [2022-02-24 00:03:08,763 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 309 transitions. Word has length 58 [2022-02-24 00:03:08,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:03:08,763 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 309 transitions. [2022-02-24 00:03:08,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 12 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2022-02-24 00:03:08,763 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 309 transitions. [2022-02-24 00:03:08,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-24 00:03:08,764 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:03:08,764 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:03:08,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-24 00:03:08,981 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 [2022-02-24 00:03:08,981 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:03:08,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:03:08,982 INFO L85 PathProgramCache]: Analyzing trace with hash -339082250, now seen corresponding path program 2 times [2022-02-24 00:03:08,982 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:03:08,982 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468249186] [2022-02-24 00:03:08,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:03:08,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:03:08,992 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-24 00:03:08,992 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [395121409] [2022-02-24 00:03:08,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-24 00:03:08,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-24 00:03:08,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 00:03:08,994 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) [2022-02-24 00:03:08,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-24 00:03:09,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-24 00:03:09,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-24 00:03:09,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-24 00:03:09,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-24 00:03:12,299 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 16 proven. 49 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-02-24 00:03:12,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-24 00:03:17,735 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:03:17,736 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468249186] [2022-02-24 00:03:17,736 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-24 00:03:17,736 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395121409] [2022-02-24 00:03:17,736 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395121409] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-24 00:03:17,736 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-24 00:03:17,736 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-02-24 00:03:17,736 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677906901] [2022-02-24 00:03:17,736 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-24 00:03:17,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-24 00:03:17,737 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:03:17,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-24 00:03:17,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2022-02-24 00:03:17,738 INFO L87 Difference]: Start difference. First operand 279 states and 309 transitions. Second operand has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 21 states have internal predecessors, (38), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-02-24 00:03:19,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:03:19,145 INFO L93 Difference]: Finished difference Result 389 states and 451 transitions. [2022-02-24 00:03:19,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-24 00:03:19,146 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 21 states have internal predecessors, (38), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 58 [2022-02-24 00:03:19,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:03:19,150 INFO L225 Difference]: With dead ends: 389 [2022-02-24 00:03:19,150 INFO L226 Difference]: Without dead ends: 387 [2022-02-24 00:03:19,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 00:03:19,151 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 35 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 00:03:19,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 434 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 344 Invalid, 0 Unknown, 104 Unchecked, 0.9s Time] [2022-02-24 00:03:19,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-02-24 00:03:19,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 271. [2022-02-24 00:03:19,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 212 states have (on average 1.1367924528301887) internal successors, (241), 220 states have internal predecessors, (241), 31 states have call successors, (31), 28 states have call predecessors, (31), 27 states have return successors, (29), 22 states have call predecessors, (29), 29 states have call successors, (29) [2022-02-24 00:03:19,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 301 transitions. [2022-02-24 00:03:19,173 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 301 transitions. Word has length 58 [2022-02-24 00:03:19,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:03:19,173 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 301 transitions. [2022-02-24 00:03:19,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 21 states have internal predecessors, (38), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-02-24 00:03:19,174 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 301 transitions. [2022-02-24 00:03:19,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-24 00:03:19,175 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:03:19,175 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:03:19,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-24 00:03:19,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-02-24 00:03:19,400 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:03:19,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:03:19,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1548458294, now seen corresponding path program 3 times [2022-02-24 00:03:19,401 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:03:19,401 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125659977] [2022-02-24 00:03:19,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:03:19,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:03:19,410 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-24 00:03:19,410 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [764670256] [2022-02-24 00:03:19,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-24 00:03:19,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-24 00:03:19,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 00:03:19,428 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-24 00:03:19,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-24 00:03:19,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-24 00:03:19,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-24 00:03:19,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-24 00:03:19,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-24 00:03:22,535 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-24 00:03:25,544 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 54 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-02-24 00:03:25,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-24 00:03:26,899 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 46 proven. 14 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-02-24 00:03:26,900 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:03:26,900 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125659977] [2022-02-24 00:03:26,900 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-24 00:03:26,900 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764670256] [2022-02-24 00:03:26,900 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764670256] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-24 00:03:26,900 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-24 00:03:26,900 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2022-02-24 00:03:26,900 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280234606] [2022-02-24 00:03:26,900 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-24 00:03:26,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-24 00:03:26,900 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:03:26,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-24 00:03:26,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2022-02-24 00:03:26,901 INFO L87 Difference]: Start difference. First operand 271 states and 301 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-02-24 00:03:29,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:03:29,728 INFO L93 Difference]: Finished difference Result 356 states and 401 transitions. [2022-02-24 00:03:29,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-24 00:03:29,728 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 58 [2022-02-24 00:03:29,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:03:29,730 INFO L225 Difference]: With dead ends: 356 [2022-02-24 00:03:29,730 INFO L226 Difference]: Without dead ends: 354 [2022-02-24 00:03:29,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 98 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2022-02-24 00:03:29,731 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 23 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 00:03:29,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 291 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 147 Invalid, 0 Unknown, 20 Unchecked, 0.5s Time] [2022-02-24 00:03:29,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2022-02-24 00:03:29,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 210. [2022-02-24 00:03:29,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 165 states have (on average 1.1575757575757575) internal successors, (191), 166 states have internal predecessors, (191), 23 states have call successors, (23), 22 states have call predecessors, (23), 21 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-02-24 00:03:29,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 235 transitions. [2022-02-24 00:03:29,748 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 235 transitions. Word has length 58 [2022-02-24 00:03:29,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:03:29,749 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 235 transitions. [2022-02-24 00:03:29,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-02-24 00:03:29,749 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 235 transitions. [2022-02-24 00:03:29,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 00:03:29,750 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:03:29,750 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:03:29,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-24 00:03:29,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-02-24 00:03:29,967 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:03:29,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:03:29,969 INFO L85 PathProgramCache]: Analyzing trace with hash 680514773, now seen corresponding path program 2 times [2022-02-24 00:03:29,969 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:03:29,969 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536153389] [2022-02-24 00:03:29,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:03:29,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:03:29,979 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-24 00:03:29,980 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [258060314] [2022-02-24 00:03:29,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-24 00:03:29,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-24 00:03:29,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 00:03:29,982 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-24 00:03:29,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-24 00:03:30,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-24 00:03:30,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-24 00:03:30,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 46 conjunts are in the unsatisfiable core [2022-02-24 00:03:30,045 INFO L286 TraceCheckSpWp]: Computing forward predicates...