/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/hard-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-23 23:00:12,408 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-23 23:00:12,409 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-23 23:00:12,427 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-23 23:00:12,428 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-23 23:00:12,428 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-23 23:00:12,429 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-23 23:00:12,430 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-23 23:00:12,431 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-23 23:00:12,432 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-23 23:00:12,432 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-23 23:00:12,433 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-23 23:00:12,433 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-23 23:00:12,434 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-23 23:00:12,435 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-23 23:00:12,435 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-23 23:00:12,436 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-23 23:00:12,437 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-23 23:00:12,438 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-23 23:00:12,439 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-23 23:00:12,440 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-23 23:00:12,441 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-23 23:00:12,442 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-23 23:00:12,442 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-23 23:00:12,444 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-23 23:00:12,449 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-23 23:00:12,450 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-23 23:00:12,450 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-23 23:00:12,453 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-02-23 23:00:12,468 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-23 23:00:12,469 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-23 23:00:12,469 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-23 23:00:12,469 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-23 23:00:12,470 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-23 23:00:12,470 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-23 23:00:12,470 INFO L138 SettingsManager]: * Use SBE=true [2022-02-23 23:00:12,470 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-23 23:00:12,470 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-23 23:00:12,470 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-23 23:00:12,470 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-23 23:00:12,470 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-23 23:00:12,470 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-23 23:00:12,471 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-23 23:00:12,471 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-23 23:00:12,471 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-23 23:00:12,471 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-23 23:00:12,471 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-23 23:00:12,471 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-23 23:00:12,471 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 23:00:12,471 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-23 23:00:12,471 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-23 23:00:12,471 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-23 23:00:12,472 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-23 23:00:12,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-23 23:00:12,472 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-23 23:00:12,472 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-02-23 23:00:12,472 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-02-23 23:00:12,472 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-23 23:00:12,472 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-23 23:00:12,611 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-23 23:00:12,625 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-23 23:00:12,627 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-23 23:00:12,628 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-23 23:00:12,628 INFO L275 PluginConnector]: CDTParser initialized [2022-02-23 23:00:12,629 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound50.c [2022-02-23 23:00:12,685 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b290c1b65/2e3ea5e35f6f4966b15e011d7ac598da/FLAG68a42ae31 [2022-02-23 23:00:13,043 INFO L306 CDTParser]: Found 1 translation units. [2022-02-23 23:00:13,043 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound50.c [2022-02-23 23:00:13,047 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b290c1b65/2e3ea5e35f6f4966b15e011d7ac598da/FLAG68a42ae31 [2022-02-23 23:00:13,056 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b290c1b65/2e3ea5e35f6f4966b15e011d7ac598da [2022-02-23 23:00:13,058 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-23 23:00:13,059 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-23 23:00:13,061 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-23 23:00:13,062 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-23 23:00:13,064 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-23 23:00:13,064 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 11:00:13" (1/1) ... [2022-02-23 23:00:13,065 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f73a88e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:00:13, skipping insertion in model container [2022-02-23 23:00:13,065 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 11:00:13" (1/1) ... [2022-02-23 23:00:13,070 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-23 23:00:13,079 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-23 23:00:13,214 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/hard-ll_unwindbound50.c[538,551] [2022-02-23 23:00:13,242 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 23:00:13,247 INFO L203 MainTranslator]: Completed pre-run [2022-02-23 23:00:13,255 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/hard-ll_unwindbound50.c[538,551] [2022-02-23 23:00:13,259 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 23:00:13,268 INFO L208 MainTranslator]: Completed translation [2022-02-23 23:00:13,268 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:00:13 WrapperNode [2022-02-23 23:00:13,269 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-23 23:00:13,270 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-23 23:00:13,270 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-23 23:00:13,270 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-23 23:00:13,277 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:00:13" (1/1) ... [2022-02-23 23:00:13,278 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:00:13" (1/1) ... [2022-02-23 23:00:13,282 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:00:13" (1/1) ... [2022-02-23 23:00:13,282 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:00:13" (1/1) ... [2022-02-23 23:00:13,285 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:00:13" (1/1) ... [2022-02-23 23:00:13,288 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:00:13" (1/1) ... [2022-02-23 23:00:13,289 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:00:13" (1/1) ... [2022-02-23 23:00:13,290 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-23 23:00:13,291 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-23 23:00:13,291 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-23 23:00:13,291 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-23 23:00:13,304 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:00:13" (1/1) ... [2022-02-23 23:00:13,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 23:00:13,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 23:00:13,329 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) [2022-02-23 23:00:13,333 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 [2022-02-23 23:00:13,354 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-23 23:00:13,354 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-23 23:00:13,354 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-23 23:00:13,354 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-23 23:00:13,354 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-23 23:00:13,354 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-23 23:00:13,354 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-23 23:00:13,354 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-23 23:00:13,354 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-23 23:00:13,355 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-23 23:00:13,355 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-02-23 23:00:13,355 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-23 23:00:13,355 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-23 23:00:13,355 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-23 23:00:13,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-23 23:00:13,355 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-23 23:00:13,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-23 23:00:13,355 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-23 23:00:13,355 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-23 23:00:13,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-23 23:00:13,396 INFO L234 CfgBuilder]: Building ICFG [2022-02-23 23:00:13,397 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-23 23:00:13,487 INFO L275 CfgBuilder]: Performing block encoding [2022-02-23 23:00:13,491 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-23 23:00:13,491 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-23 23:00:13,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 11:00:13 BoogieIcfgContainer [2022-02-23 23:00:13,492 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-23 23:00:13,493 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-23 23:00:13,493 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-23 23:00:13,494 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-23 23:00:13,496 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 11:00:13" (1/1) ... [2022-02-23 23:00:13,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 11:00:13 BasicIcfg [2022-02-23 23:00:13,509 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-23 23:00:13,510 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-23 23:00:13,510 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-23 23:00:13,512 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-23 23:00:13,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 11:00:13" (1/4) ... [2022-02-23 23:00:13,513 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7727c556 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 11:00:13, skipping insertion in model container [2022-02-23 23:00:13,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:00:13" (2/4) ... [2022-02-23 23:00:13,513 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7727c556 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 11:00:13, skipping insertion in model container [2022-02-23 23:00:13,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 11:00:13" (3/4) ... [2022-02-23 23:00:13,513 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7727c556 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 11:00:13, skipping insertion in model container [2022-02-23 23:00:13,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 11:00:13" (4/4) ... [2022-02-23 23:00:13,514 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_unwindbound50.cqvasr [2022-02-23 23:00:13,518 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-23 23:00:13,518 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-23 23:00:13,559 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-23 23:00:13,564 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 [2022-02-23 23:00:13,564 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-23 23:00:13,577 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-23 23:00:13,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-23 23:00:13,582 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 23:00:13,583 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 23:00:13,583 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 23:00:13,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 23:00:13,587 INFO L85 PathProgramCache]: Analyzing trace with hash 79654685, now seen corresponding path program 1 times [2022-02-23 23:00:13,593 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 23:00:13,593 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718348501] [2022-02-23 23:00:13,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:00:13,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 23:00:13,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:00:13,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 23:00:13,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:00:13,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-23 23:00:13,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:00:13,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 23:00:13,811 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 23:00:13,812 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718348501] [2022-02-23 23:00:13,812 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718348501] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 23:00:13,812 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 23:00:13,812 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-23 23:00:13,814 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285015963] [2022-02-23 23:00:13,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 23:00:13,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-23 23:00:13,817 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 23:00:13,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-23 23:00:13,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 23:00:13,845 INFO L87 Difference]: Start difference. First operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-23 23:00:13,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 23:00:13,953 INFO L93 Difference]: Finished difference Result 66 states and 101 transitions. [2022-02-23 23:00:13,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-23 23:00:13,957 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-02-23 23:00:13,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 23:00:13,971 INFO L225 Difference]: With dead ends: 66 [2022-02-23 23:00:13,971 INFO L226 Difference]: Without dead ends: 33 [2022-02-23 23:00:13,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 23:00:13,980 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 23:00:13,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 49 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 23:00:13,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-02-23 23:00:14,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2022-02-23 23:00:14,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-23 23:00:14,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2022-02-23 23:00:14,019 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18 [2022-02-23 23:00:14,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 23:00:14,020 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2022-02-23 23:00:14,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-23 23:00:14,020 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2022-02-23 23:00:14,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-23 23:00:14,021 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 23:00:14,021 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 23:00:14,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-23 23:00:14,021 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 23:00:14,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 23:00:14,022 INFO L85 PathProgramCache]: Analyzing trace with hash -85369733, now seen corresponding path program 1 times [2022-02-23 23:00:14,022 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 23:00:14,022 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670925890] [2022-02-23 23:00:14,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:00:14,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 23:00:14,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:00:14,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 23:00:14,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:00:14,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-23 23:00:14,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:00:14,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 23:00:14,136 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 23:00:14,137 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670925890] [2022-02-23 23:00:14,137 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670925890] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 23:00:14,137 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 23:00:14,137 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-23 23:00:14,137 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185425328] [2022-02-23 23:00:14,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 23:00:14,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-23 23:00:14,138 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 23:00:14,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-23 23:00:14,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-23 23:00:14,139 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2022-02-23 23:00:14,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 23:00:14,305 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2022-02-23 23:00:14,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-23 23:00:14,306 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 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 18 [2022-02-23 23:00:14,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 23:00:14,309 INFO L225 Difference]: With dead ends: 47 [2022-02-23 23:00:14,309 INFO L226 Difference]: Without dead ends: 45 [2022-02-23 23:00:14,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-02-23 23:00:14,316 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 28 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 23:00:14,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 96 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 23:00:14,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-02-23 23:00:14,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2022-02-23 23:00:14,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-23 23:00:14,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2022-02-23 23:00:14,337 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 18 [2022-02-23 23:00:14,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 23:00:14,338 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2022-02-23 23:00:14,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2022-02-23 23:00:14,338 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2022-02-23 23:00:14,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-23 23:00:14,339 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 23:00:14,340 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 23:00:14,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-23 23:00:14,341 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 23:00:14,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 23:00:14,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1527809342, now seen corresponding path program 1 times [2022-02-23 23:00:14,342 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 23:00:14,342 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204843116] [2022-02-23 23:00:14,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:00:14,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 23:00:14,357 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 23:00:14,358 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2144963769] [2022-02-23 23:00:14,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:00:14,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:00:14,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 23:00:14,379 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) [2022-02-23 23:00:14,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-23 23:00:14,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:00:14,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-23 23:00:14,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 23:00:14,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 23:00:14,550 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 23:00:14,550 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 23:00:14,550 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204843116] [2022-02-23 23:00:14,550 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 23:00:14,551 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144963769] [2022-02-23 23:00:14,552 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144963769] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 23:00:14,553 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 23:00:14,553 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 23:00:14,554 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838505090] [2022-02-23 23:00:14,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 23:00:14,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 23:00:14,555 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 23:00:14,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 23:00:14,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 23:00:14,556 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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) [2022-02-23 23:00:14,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 23:00:14,573 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2022-02-23 23:00:14,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 23:00:14,573 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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 20 [2022-02-23 23:00:14,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 23:00:14,576 INFO L225 Difference]: With dead ends: 52 [2022-02-23 23:00:14,576 INFO L226 Difference]: Without dead ends: 38 [2022-02-23 23:00:14,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 23:00:14,579 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 23:00:14,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 107 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 23:00:14,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-02-23 23:00:14,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-02-23 23:00:14,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-23 23:00:14,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2022-02-23 23:00:14,588 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 20 [2022-02-23 23:00:14,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 23:00:14,588 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2022-02-23 23:00:14,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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) [2022-02-23 23:00:14,589 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2022-02-23 23:00:14,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-23 23:00:14,589 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 23:00:14,589 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] [2022-02-23 23:00:14,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-23 23:00:14,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:00:14,810 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 23:00:14,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 23:00:14,810 INFO L85 PathProgramCache]: Analyzing trace with hash 2128444854, now seen corresponding path program 1 times [2022-02-23 23:00:14,810 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 23:00:14,810 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038356833] [2022-02-23 23:00:14,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:00:14,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 23:00:14,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:00:14,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 23:00:14,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:00:14,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-23 23:00:14,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:00:14,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-02-23 23:00:14,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:00:14,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 23:00:14,880 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 23:00:14,880 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038356833] [2022-02-23 23:00:14,881 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038356833] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 23:00:14,881 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 23:00:14,881 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-23 23:00:14,881 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249940536] [2022-02-23 23:00:14,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 23:00:14,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-23 23:00:14,882 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 23:00:14,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-23 23:00:14,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-23 23:00:14,882 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 23:00:15,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 23:00:15,007 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2022-02-23 23:00:15,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-23 23:00:15,008 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-02-23 23:00:15,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 23:00:15,008 INFO L225 Difference]: With dead ends: 52 [2022-02-23 23:00:15,009 INFO L226 Difference]: Without dead ends: 50 [2022-02-23 23:00:15,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-02-23 23:00:15,009 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 23 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 23:00:15,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 89 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 23:00:15,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-02-23 23:00:15,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2022-02-23 23:00:15,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-23 23:00:15,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2022-02-23 23:00:15,017 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 23 [2022-02-23 23:00:15,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 23:00:15,017 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2022-02-23 23:00:15,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 23:00:15,017 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2022-02-23 23:00:15,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-23 23:00:15,018 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 23:00:15,018 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 23:00:15,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-23 23:00:15,018 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 23:00:15,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 23:00:15,027 INFO L85 PathProgramCache]: Analyzing trace with hash 135546551, now seen corresponding path program 1 times [2022-02-23 23:00:15,028 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 23:00:15,028 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571189216] [2022-02-23 23:00:15,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:00:15,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 23:00:15,037 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 23:00:15,038 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [911603354] [2022-02-23 23:00:15,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:00:15,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:00:15,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 23:00:15,039 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) [2022-02-23 23:00:15,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-23 23:00:15,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:00:15,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 23:00:15,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 23:00:15,168 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 23:00:15,168 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 23:00:15,168 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 23:00:15,168 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571189216] [2022-02-23 23:00:15,168 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 23:00:15,168 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911603354] [2022-02-23 23:00:15,169 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911603354] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 23:00:15,169 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 23:00:15,169 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 23:00:15,169 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732690117] [2022-02-23 23:00:15,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 23:00:15,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 23:00:15,169 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 23:00:15,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 23:00:15,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 23:00:15,170 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-23 23:00:15,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 23:00:15,211 INFO L93 Difference]: Finished difference Result 71 states and 93 transitions. [2022-02-23 23:00:15,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 23:00:15,211 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-02-23 23:00:15,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 23:00:15,212 INFO L225 Difference]: With dead ends: 71 [2022-02-23 23:00:15,212 INFO L226 Difference]: Without dead ends: 56 [2022-02-23 23:00:15,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-23 23:00:15,213 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 10 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 23:00:15,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 154 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 23:00:15,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-02-23 23:00:15,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-02-23 23:00:15,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 35 states have internal predecessors, (41), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-02-23 23:00:15,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2022-02-23 23:00:15,220 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 28 [2022-02-23 23:00:15,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 23:00:15,220 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2022-02-23 23:00:15,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-23 23:00:15,220 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2022-02-23 23:00:15,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-23 23:00:15,221 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 23:00:15,221 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 23:00:15,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-23 23:00:15,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:00:15,436 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 23:00:15,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 23:00:15,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1016025214, now seen corresponding path program 1 times [2022-02-23 23:00:15,436 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 23:00:15,436 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939607976] [2022-02-23 23:00:15,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:00:15,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 23:00:15,445 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 23:00:15,445 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1507133370] [2022-02-23 23:00:15,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:00:15,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:00:15,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 23:00:15,448 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) [2022-02-23 23:00:15,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-23 23:00:15,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:00:15,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 23:00:15,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 23:00:15,553 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-23 23:00:15,553 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 23:00:15,553 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 23:00:15,553 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939607976] [2022-02-23 23:00:15,553 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 23:00:15,553 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507133370] [2022-02-23 23:00:15,553 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507133370] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 23:00:15,553 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 23:00:15,554 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 23:00:15,554 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734878464] [2022-02-23 23:00:15,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 23:00:15,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 23:00:15,554 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 23:00:15,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 23:00:15,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-23 23:00:15,555 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-23 23:00:15,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 23:00:15,593 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2022-02-23 23:00:15,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 23:00:15,594 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2022-02-23 23:00:15,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 23:00:15,596 INFO L225 Difference]: With dead ends: 76 [2022-02-23 23:00:15,596 INFO L226 Difference]: Without dead ends: 69 [2022-02-23 23:00:15,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-23 23:00:15,598 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 7 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 23:00:15,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 136 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 23:00:15,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-02-23 23:00:15,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2022-02-23 23:00:15,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 44 states have internal predecessors, (49), 16 states have call successors, (16), 10 states have call predecessors, (16), 9 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-02-23 23:00:15,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2022-02-23 23:00:15,627 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 36 [2022-02-23 23:00:15,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 23:00:15,629 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2022-02-23 23:00:15,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-23 23:00:15,629 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2022-02-23 23:00:15,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-23 23:00:15,630 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 23:00:15,630 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 23:00:15,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-23 23:00:15,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:00:15,849 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 23:00:15,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 23:00:15,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1017127481, now seen corresponding path program 1 times [2022-02-23 23:00:15,849 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 23:00:15,849 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534582335] [2022-02-23 23:00:15,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:00:15,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 23:00:15,861 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 23:00:15,862 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [660807872] [2022-02-23 23:00:15,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:00:15,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:00:15,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 23:00:15,868 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) [2022-02-23 23:00:15,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-23 23:00:15,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:00:15,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-23 23:00:15,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 23:00:16,050 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-23 23:00:16,050 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 23:00:16,050 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 23:00:16,051 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534582335] [2022-02-23 23:00:16,051 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 23:00:16,051 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660807872] [2022-02-23 23:00:16,051 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660807872] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 23:00:16,051 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 23:00:16,051 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-23 23:00:16,051 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501014432] [2022-02-23 23:00:16,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 23:00:16,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-23 23:00:16,052 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 23:00:16,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-23 23:00:16,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-23 23:00:16,052 INFO L87 Difference]: Start difference. First operand 68 states and 78 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-23 23:00:16,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 23:00:16,107 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2022-02-23 23:00:16,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-23 23:00:16,107 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2022-02-23 23:00:16,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 23:00:16,108 INFO L225 Difference]: With dead ends: 74 [2022-02-23 23:00:16,108 INFO L226 Difference]: Without dead ends: 58 [2022-02-23 23:00:16,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-02-23 23:00:16,108 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 10 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 23:00:16,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 184 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 23:00:16,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-02-23 23:00:16,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-02-23 23:00:16,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 37 states have internal predecessors, (42), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-02-23 23:00:16,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2022-02-23 23:00:16,113 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 36 [2022-02-23 23:00:16,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 23:00:16,113 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2022-02-23 23:00:16,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-23 23:00:16,113 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2022-02-23 23:00:16,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-23 23:00:16,114 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 23:00:16,114 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 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, 1, 1] [2022-02-23 23:00:16,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-23 23:00:16,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:00:16,330 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 23:00:16,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 23:00:16,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1880362404, now seen corresponding path program 1 times [2022-02-23 23:00:16,331 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 23:00:16,331 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279998711] [2022-02-23 23:00:16,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:00:16,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 23:00:16,338 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 23:00:16,338 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [557800652] [2022-02-23 23:00:16,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:00:16,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:00:16,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 23:00:16,340 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) [2022-02-23 23:00:16,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-23 23:00:16,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:00:16,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 23:00:16,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 23:00:16,434 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-23 23:00:16,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 23:00:16,507 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-23 23:00:16,507 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 23:00:16,507 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279998711] [2022-02-23 23:00:16,507 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 23:00:16,507 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557800652] [2022-02-23 23:00:16,507 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557800652] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 23:00:16,507 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 23:00:16,508 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-02-23 23:00:16,508 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637562150] [2022-02-23 23:00:16,508 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 23:00:16,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-23 23:00:16,508 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 23:00:16,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-23 23:00:16,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-02-23 23:00:16,509 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2022-02-23 23:00:16,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 23:00:16,577 INFO L93 Difference]: Finished difference Result 123 states and 147 transitions. [2022-02-23 23:00:16,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-23 23:00:16,577 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 38 [2022-02-23 23:00:16,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 23:00:16,578 INFO L225 Difference]: With dead ends: 123 [2022-02-23 23:00:16,578 INFO L226 Difference]: Without dead ends: 109 [2022-02-23 23:00:16,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-02-23 23:00:16,579 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 54 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 23:00:16,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 217 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 23:00:16,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-02-23 23:00:16,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 103. [2022-02-23 23:00:16,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 65 states have (on average 1.1846153846153846) internal successors, (77), 67 states have internal predecessors, (77), 23 states have call successors, (23), 15 states have call predecessors, (23), 14 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-02-23 23:00:16,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2022-02-23 23:00:16,587 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 38 [2022-02-23 23:00:16,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 23:00:16,587 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2022-02-23 23:00:16,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2022-02-23 23:00:16,587 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2022-02-23 23:00:16,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-23 23:00:16,588 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 23:00:16,588 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 23:00:16,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-23 23:00:16,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:00:16,804 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 23:00:16,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 23:00:16,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1525733273, now seen corresponding path program 1 times [2022-02-23 23:00:16,805 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 23:00:16,805 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953904563] [2022-02-23 23:00:16,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:00:16,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 23:00:16,813 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 23:00:16,813 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [541111596] [2022-02-23 23:00:16,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:00:16,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:00:16,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 23:00:16,814 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) [2022-02-23 23:00:16,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-23 23:00:16,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:00:16,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-23 23:00:16,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 23:00:17,009 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-02-23 23:00:17,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 23:00:17,108 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-02-23 23:00:17,109 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 23:00:17,109 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953904563] [2022-02-23 23:00:17,109 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 23:00:17,109 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541111596] [2022-02-23 23:00:17,109 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541111596] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-23 23:00:17,109 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-23 23:00:17,109 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-02-23 23:00:17,109 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74592310] [2022-02-23 23:00:17,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 23:00:17,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 23:00:17,109 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 23:00:17,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 23:00:17,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-02-23 23:00:17,110 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-23 23:00:17,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 23:00:17,225 INFO L93 Difference]: Finished difference Result 120 states and 141 transitions. [2022-02-23 23:00:17,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 23:00:17,225 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 46 [2022-02-23 23:00:17,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 23:00:17,226 INFO L225 Difference]: With dead ends: 120 [2022-02-23 23:00:17,226 INFO L226 Difference]: Without dead ends: 118 [2022-02-23 23:00:17,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-02-23 23:00:17,227 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 11 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 23:00:17,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 136 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 23:00:17,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-02-23 23:00:17,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 115. [2022-02-23 23:00:17,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 73 states have (on average 1.1643835616438356) internal successors, (85), 76 states have internal predecessors, (85), 25 states have call successors, (25), 17 states have call predecessors, (25), 16 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2022-02-23 23:00:17,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 132 transitions. [2022-02-23 23:00:17,234 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 132 transitions. Word has length 46 [2022-02-23 23:00:17,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 23:00:17,234 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 132 transitions. [2022-02-23 23:00:17,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-23 23:00:17,234 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 132 transitions. [2022-02-23 23:00:17,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-23 23:00:17,235 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 23:00:17,235 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 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] [2022-02-23 23:00:17,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-23 23:00:17,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:00:17,438 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 23:00:17,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 23:00:17,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1447419744, now seen corresponding path program 1 times [2022-02-23 23:00:17,438 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 23:00:17,438 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118045193] [2022-02-23 23:00:17,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:00:17,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 23:00:17,445 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 23:00:17,445 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2103902117] [2022-02-23 23:00:17,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:00:17,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:00:17,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 23:00:17,447 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) [2022-02-23 23:00:17,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-23 23:00:17,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:00:17,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-23 23:00:17,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 23:00:17,587 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-23 23:00:17,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 23:00:17,686 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-02-23 23:00:17,687 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 23:00:17,687 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118045193] [2022-02-23 23:00:17,687 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 23:00:17,687 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103902117] [2022-02-23 23:00:17,687 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103902117] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 23:00:17,687 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 23:00:17,687 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-02-23 23:00:17,687 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895585479] [2022-02-23 23:00:17,687 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 23:00:17,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-23 23:00:17,688 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 23:00:17,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-23 23:00:17,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-02-23 23:00:17,688 INFO L87 Difference]: Start difference. First operand 115 states and 132 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 8 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) [2022-02-23 23:00:17,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 23:00:17,817 INFO L93 Difference]: Finished difference Result 207 states and 246 transitions. [2022-02-23 23:00:17,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-23 23:00:17,817 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 8 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) Word has length 54 [2022-02-23 23:00:17,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 23:00:17,819 INFO L225 Difference]: With dead ends: 207 [2022-02-23 23:00:17,819 INFO L226 Difference]: Without dead ends: 193 [2022-02-23 23:00:17,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-02-23 23:00:17,820 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 106 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 23:00:17,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 224 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 23:00:17,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-02-23 23:00:17,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 186. [2022-02-23 23:00:17,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 118 states have (on average 1.1779661016949152) internal successors, (139), 125 states have internal predecessors, (139), 43 states have call successors, (43), 25 states have call predecessors, (43), 24 states have return successors, (38), 35 states have call predecessors, (38), 38 states have call successors, (38) [2022-02-23 23:00:17,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 220 transitions. [2022-02-23 23:00:17,830 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 220 transitions. Word has length 54 [2022-02-23 23:00:17,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 23:00:17,831 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 220 transitions. [2022-02-23 23:00:17,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 8 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) [2022-02-23 23:00:17,831 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 220 transitions. [2022-02-23 23:00:17,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-23 23:00:17,831 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 23:00:17,831 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 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] [2022-02-23 23:00:17,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-23 23:00:18,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:00:18,048 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 23:00:18,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 23:00:18,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1448522011, now seen corresponding path program 1 times [2022-02-23 23:00:18,049 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 23:00:18,049 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368398348] [2022-02-23 23:00:18,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:00:18,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 23:00:18,056 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 23:00:18,057 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [657957553] [2022-02-23 23:00:18,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:00:18,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:00:18,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 23:00:18,058 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) [2022-02-23 23:00:18,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-23 23:00:18,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:00:18,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-23 23:00:18,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 23:00:18,441 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-02-23 23:00:18,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 23:00:18,627 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-02-23 23:00:18,628 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 23:00:18,628 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368398348] [2022-02-23 23:00:18,628 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 23:00:18,628 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657957553] [2022-02-23 23:00:18,628 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657957553] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 23:00:18,628 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 23:00:18,628 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-02-23 23:00:18,628 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070440622] [2022-02-23 23:00:18,628 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 23:00:18,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-23 23:00:18,629 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 23:00:18,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-23 23:00:18,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-02-23 23:00:18,629 INFO L87 Difference]: Start difference. First operand 186 states and 220 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 7 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-02-23 23:00:18,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 23:00:18,823 INFO L93 Difference]: Finished difference Result 268 states and 340 transitions. [2022-02-23 23:00:18,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-23 23:00:18,824 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 7 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 54 [2022-02-23 23:00:18,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 23:00:18,825 INFO L225 Difference]: With dead ends: 268 [2022-02-23 23:00:18,825 INFO L226 Difference]: Without dead ends: 264 [2022-02-23 23:00:18,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-02-23 23:00:18,826 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 58 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 23:00:18,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 294 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 23:00:18,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-02-23 23:00:18,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 239. [2022-02-23 23:00:18,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 155 states have (on average 1.2193548387096773) internal successors, (189), 163 states have internal predecessors, (189), 56 states have call successors, (56), 29 states have call predecessors, (56), 27 states have return successors, (51), 46 states have call predecessors, (51), 51 states have call successors, (51) [2022-02-23 23:00:18,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 296 transitions. [2022-02-23 23:00:18,842 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 296 transitions. Word has length 54 [2022-02-23 23:00:18,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 23:00:18,842 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 296 transitions. [2022-02-23 23:00:18,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 7 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-02-23 23:00:18,843 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 296 transitions. [2022-02-23 23:00:18,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-23 23:00:18,843 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 23:00:18,843 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 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, 1, 1] [2022-02-23 23:00:18,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-23 23:00:19,058 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,SelfDestructingSolverStorable10 [2022-02-23 23:00:19,058 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 23:00:19,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 23:00:19,059 INFO L85 PathProgramCache]: Analyzing trace with hash 113245770, now seen corresponding path program 1 times [2022-02-23 23:00:19,059 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 23:00:19,059 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266971543] [2022-02-23 23:00:19,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:00:19,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 23:00:19,066 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 23:00:19,066 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [142369816] [2022-02-23 23:00:19,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:00:19,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:00:19,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 23:00:19,068 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) [2022-02-23 23:00:19,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-23 23:00:19,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:00:19,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-23 23:00:19,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 23:00:19,807 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 36 proven. 10 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-02-23 23:00:19,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 23:00:50,494 WARN L232 SmtUtils]: Spent 16.88s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-23 23:02:04,395 WARN L232 SmtUtils]: Spent 21.33s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-23 23:03:20,922 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 36 proven. 10 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-02-23 23:03:20,922 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 23:03:20,922 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266971543] [2022-02-23 23:03:20,922 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 23:03:20,922 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142369816] [2022-02-23 23:03:20,922 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142369816] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 23:03:20,922 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 23:03:20,922 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2022-02-23 23:03:20,923 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870892751] [2022-02-23 23:03:20,923 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 23:03:20,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-23 23:03:20,923 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 23:03:20,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-23 23:03:20,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=270, Unknown=2, NotChecked=0, Total=342 [2022-02-23 23:03:20,924 INFO L87 Difference]: Start difference. First operand 239 states and 296 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 16 states have internal predecessors, (43), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (18), 9 states have call predecessors, (18), 7 states have call successors, (18) [2022-02-23 23:03:36,310 WARN L232 SmtUtils]: Spent 13.85s on a formula simplification. DAG size of input: 57 DAG size of output: 27 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-23 23:03:56,165 WARN L232 SmtUtils]: Spent 16.08s on a formula simplification that was a NOOP. DAG size: 70 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-23 23:04:02,072 WARN L232 SmtUtils]: Spent 5.33s on a formula simplification. DAG size of input: 58 DAG size of output: 27 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-23 23:04:08,165 WARN L232 SmtUtils]: Spent 5.20s on a formula simplification. DAG size of input: 63 DAG size of output: 29 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-23 23:04:11,288 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 23:04:12,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 23:04:12,684 INFO L93 Difference]: Finished difference Result 369 states and 471 transitions. [2022-02-23 23:04:12,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-23 23:04:12,685 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 16 states have internal predecessors, (43), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (18), 9 states have call predecessors, (18), 7 states have call successors, (18) Word has length 68 [2022-02-23 23:04:12,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 23:04:12,687 INFO L225 Difference]: With dead ends: 369 [2022-02-23 23:04:12,687 INFO L226 Difference]: Without dead ends: 293 [2022-02-23 23:04:12,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 86.9s TimeCoverageRelationStatistics Valid=162, Invalid=648, Unknown=2, NotChecked=0, Total=812 [2022-02-23 23:04:12,688 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 86 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2022-02-23 23:04:12,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 350 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 9.1s Time] [2022-02-23 23:04:12,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-02-23 23:04:12,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 252. [2022-02-23 23:04:12,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 168 states have (on average 1.1904761904761905) internal successors, (200), 176 states have internal predecessors, (200), 53 states have call successors, (53), 31 states have call predecessors, (53), 30 states have return successors, (49), 44 states have call predecessors, (49), 49 states have call successors, (49) [2022-02-23 23:04:12,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 302 transitions. [2022-02-23 23:04:12,743 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 302 transitions. Word has length 68 [2022-02-23 23:04:12,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 23:04:12,744 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 302 transitions. [2022-02-23 23:04:12,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 16 states have internal predecessors, (43), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (18), 9 states have call predecessors, (18), 7 states have call successors, (18) [2022-02-23 23:04:12,744 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 302 transitions. [2022-02-23 23:04:12,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-02-23 23:04:12,745 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 23:04:12,745 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1] [2022-02-23 23:04:12,774 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-02-23 23:04:12,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:04:12,946 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 23:04:12,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 23:04:12,946 INFO L85 PathProgramCache]: Analyzing trace with hash -742748636, now seen corresponding path program 1 times [2022-02-23 23:04:12,946 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 23:04:12,946 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149325548] [2022-02-23 23:04:12,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:04:12,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 23:04:12,953 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 23:04:12,953 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1238809737] [2022-02-23 23:04:12,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:04:12,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:04:12,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 23:04:12,958 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) [2022-02-23 23:04:12,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-23 23:04:13,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:04:13,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-23 23:04:13,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 23:04:13,473 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 25 proven. 33 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-02-23 23:04:13,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 23:04:16,113 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 23:04:16,113 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149325548] [2022-02-23 23:04:16,113 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 23:04:16,113 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238809737] [2022-02-23 23:04:16,113 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238809737] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 23:04:16,113 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 23:04:16,113 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-02-23 23:04:16,113 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618807104] [2022-02-23 23:04:16,113 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 23:04:16,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-23 23:04:16,114 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 23:04:16,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-23 23:04:16,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2022-02-23 23:04:16,114 INFO L87 Difference]: Start difference. First operand 252 states and 302 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2022-02-23 23:04:17,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 23:04:17,126 INFO L93 Difference]: Finished difference Result 350 states and 433 transitions. [2022-02-23 23:04:17,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-23 23:04:17,126 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 79 [2022-02-23 23:04:17,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 23:04:17,129 INFO L225 Difference]: With dead ends: 350 [2022-02-23 23:04:17,129 INFO L226 Difference]: Without dead ends: 287 [2022-02-23 23:04:17,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2022-02-23 23:04:17,134 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 30 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-23 23:04:17,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 528 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-23 23:04:17,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-02-23 23:04:17,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 268. [2022-02-23 23:04:17,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 178 states have (on average 1.1797752808988764) internal successors, (210), 186 states have internal predecessors, (210), 57 states have call successors, (57), 34 states have call predecessors, (57), 32 states have return successors, (53), 47 states have call predecessors, (53), 53 states have call successors, (53) [2022-02-23 23:04:17,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 320 transitions. [2022-02-23 23:04:17,164 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 320 transitions. Word has length 79 [2022-02-23 23:04:17,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 23:04:17,164 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 320 transitions. [2022-02-23 23:04:17,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2022-02-23 23:04:17,164 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 320 transitions. [2022-02-23 23:04:17,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-02-23 23:04:17,165 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 23:04:17,165 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 23:04:17,181 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-02-23 23:04:17,378 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,SelfDestructingSolverStorable12 [2022-02-23 23:04:17,378 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 23:04:17,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 23:04:17,379 INFO L85 PathProgramCache]: Analyzing trace with hash -911798983, now seen corresponding path program 2 times [2022-02-23 23:04:17,379 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 23:04:17,379 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337608741] [2022-02-23 23:04:17,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:04:17,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 23:04:17,385 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 23:04:17,385 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [243263331] [2022-02-23 23:04:17,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 23:04:17,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:04:17,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 23:04:17,386 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) [2022-02-23 23:04:17,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-23 23:04:17,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 23:04:17,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 23:04:17,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 23:04:17,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 23:04:17,559 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-02-23 23:04:17,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 23:04:17,719 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-02-23 23:04:17,719 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 23:04:17,719 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337608741] [2022-02-23 23:04:17,719 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 23:04:17,719 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243263331] [2022-02-23 23:04:17,719 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243263331] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 23:04:17,719 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 23:04:17,719 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2022-02-23 23:04:17,720 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246581826] [2022-02-23 23:04:17,720 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 23:04:17,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 23:04:17,720 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 23:04:17,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 23:04:17,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-23 23:04:17,720 INFO L87 Difference]: Start difference. First operand 268 states and 320 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2022-02-23 23:04:17,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 23:04:17,787 INFO L93 Difference]: Finished difference Result 306 states and 366 transitions. [2022-02-23 23:04:17,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 23:04:17,787 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 82 [2022-02-23 23:04:17,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 23:04:17,788 INFO L225 Difference]: With dead ends: 306 [2022-02-23 23:04:17,788 INFO L226 Difference]: Without dead ends: 259 [2022-02-23 23:04:17,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 159 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-23 23:04:17,789 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 0 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 23:04:17,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 141 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 23:04:17,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-02-23 23:04:17,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 248. [2022-02-23 23:04:17,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 166 states have (on average 1.1686746987951808) internal successors, (194), 171 states have internal predecessors, (194), 51 states have call successors, (51), 32 states have call predecessors, (51), 30 states have return successors, (48), 44 states have call predecessors, (48), 48 states have call successors, (48) [2022-02-23 23:04:17,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 293 transitions. [2022-02-23 23:04:17,803 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 293 transitions. Word has length 82 [2022-02-23 23:04:17,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 23:04:17,804 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 293 transitions. [2022-02-23 23:04:17,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2022-02-23 23:04:17,804 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 293 transitions. [2022-02-23 23:04:17,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-02-23 23:04:17,804 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 23:04:17,804 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1] [2022-02-23 23:04:17,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-23 23:04:18,018 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,SelfDestructingSolverStorable13 [2022-02-23 23:04:18,018 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 23:04:18,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 23:04:18,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1053492757, now seen corresponding path program 1 times [2022-02-23 23:04:18,018 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 23:04:18,018 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304504858] [2022-02-23 23:04:18,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:04:18,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 23:04:18,024 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 23:04:18,025 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [169990672] [2022-02-23 23:04:18,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:04:18,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:04:18,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 23:04:18,029 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) [2022-02-23 23:04:18,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-23 23:04:18,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:04:18,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-23 23:04:18,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 23:04:18,309 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-02-23 23:04:18,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 23:04:18,656 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-02-23 23:04:18,656 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 23:04:18,656 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304504858] [2022-02-23 23:04:18,656 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 23:04:18,656 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169990672] [2022-02-23 23:04:18,656 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169990672] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 23:04:18,656 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 23:04:18,656 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-02-23 23:04:18,656 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672189156] [2022-02-23 23:04:18,656 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 23:04:18,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-23 23:04:18,657 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 23:04:18,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-23 23:04:18,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-02-23 23:04:18,657 INFO L87 Difference]: Start difference. First operand 248 states and 293 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 8 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-02-23 23:04:18,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 23:04:18,884 INFO L93 Difference]: Finished difference Result 254 states and 299 transitions. [2022-02-23 23:04:18,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-23 23:04:18,884 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 8 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 84 [2022-02-23 23:04:18,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 23:04:18,885 INFO L225 Difference]: With dead ends: 254 [2022-02-23 23:04:18,885 INFO L226 Difference]: Without dead ends: 229 [2022-02-23 23:04:18,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 157 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-02-23 23:04:18,885 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 12 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-23 23:04:18,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 296 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-23 23:04:18,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-02-23 23:04:18,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2022-02-23 23:04:18,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 153 states have (on average 1.1764705882352942) internal successors, (180), 158 states have internal predecessors, (180), 47 states have call successors, (47), 30 states have call predecessors, (47), 28 states have return successors, (44), 40 states have call predecessors, (44), 44 states have call successors, (44) [2022-02-23 23:04:18,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 271 transitions. [2022-02-23 23:04:18,903 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 271 transitions. Word has length 84 [2022-02-23 23:04:18,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 23:04:18,904 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 271 transitions. [2022-02-23 23:04:18,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 8 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-02-23 23:04:18,904 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 271 transitions. [2022-02-23 23:04:18,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-02-23 23:04:18,907 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 23:04:18,907 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1] [2022-02-23 23:04:18,932 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-02-23 23:04:19,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-02-23 23:04:19,120 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 23:04:19,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 23:04:19,120 INFO L85 PathProgramCache]: Analyzing trace with hash -883405496, now seen corresponding path program 1 times [2022-02-23 23:04:19,120 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 23:04:19,121 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2724936] [2022-02-23 23:04:19,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:04:19,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 23:04:19,133 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 23:04:19,133 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [714921867] [2022-02-23 23:04:19,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:04:19,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:04:19,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 23:04:19,141 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 23:04:19,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-23 23:04:19,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:04:19,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-23 23:04:19,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 23:04:19,331 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-02-23 23:04:19,331 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 23:04:19,331 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 23:04:19,331 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2724936] [2022-02-23 23:04:19,331 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 23:04:19,331 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714921867] [2022-02-23 23:04:19,331 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714921867] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 23:04:19,331 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 23:04:19,331 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 23:04:19,332 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511897823] [2022-02-23 23:04:19,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 23:04:19,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 23:04:19,332 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 23:04:19,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 23:04:19,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-02-23 23:04:19,332 INFO L87 Difference]: Start difference. First operand 229 states and 271 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-02-23 23:04:19,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 23:04:19,382 INFO L93 Difference]: Finished difference Result 249 states and 296 transitions. [2022-02-23 23:04:19,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 23:04:19,382 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 88 [2022-02-23 23:04:19,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 23:04:19,385 INFO L225 Difference]: With dead ends: 249 [2022-02-23 23:04:19,385 INFO L226 Difference]: Without dead ends: 228 [2022-02-23 23:04:19,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-02-23 23:04:19,385 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 26 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 23:04:19,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 105 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 23:04:19,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-02-23 23:04:19,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 218. [2022-02-23 23:04:19,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 147 states have (on average 1.1360544217687074) internal successors, (167), 150 states have internal predecessors, (167), 43 states have call successors, (43), 28 states have call predecessors, (43), 27 states have return successors, (41), 39 states have call predecessors, (41), 41 states have call successors, (41) [2022-02-23 23:04:19,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 251 transitions. [2022-02-23 23:04:19,409 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 251 transitions. Word has length 88 [2022-02-23 23:04:19,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 23:04:19,410 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 251 transitions. [2022-02-23 23:04:19,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-02-23 23:04:19,410 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 251 transitions. [2022-02-23 23:04:19,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-02-23 23:04:19,410 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 23:04:19,410 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 23:04:19,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-02-23 23:04:19,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-02-23 23:04:19,625 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 23:04:19,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 23:04:19,625 INFO L85 PathProgramCache]: Analyzing trace with hash -873799525, now seen corresponding path program 3 times [2022-02-23 23:04:19,625 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 23:04:19,625 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058806445] [2022-02-23 23:04:19,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:04:19,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 23:04:19,635 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 23:04:19,635 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1928373024] [2022-02-23 23:04:19,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 23:04:19,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:04:19,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 23:04:19,636 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 23:04:19,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-23 23:04:19,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-23 23:04:19,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 23:04:19,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 54 conjunts are in the unsatisfiable core [2022-02-23 23:04:19,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 23:04:20,591 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 69 proven. 53 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2022-02-23 23:04:20,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 23:05:08,476 WARN L232 SmtUtils]: Spent 5.97s on a formula simplification. DAG size of input: 54 DAG size of output: 28 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-23 23:06:08,351 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 81 proven. 41 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2022-02-23 23:06:08,352 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 23:06:08,352 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058806445] [2022-02-23 23:06:08,352 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 23:06:08,352 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928373024] [2022-02-23 23:06:08,352 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928373024] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 23:06:08,352 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 23:06:08,352 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 23 [2022-02-23 23:06:08,352 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743386319] [2022-02-23 23:06:08,352 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 23:06:08,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-23 23:06:08,353 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 23:06:08,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-23 23:06:08,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-02-23 23:06:08,353 INFO L87 Difference]: Start difference. First operand 218 states and 251 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 20 states have internal predecessors, (60), 11 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (29), 10 states have call predecessors, (29), 9 states have call successors, (29) [2022-02-23 23:06:49,182 WARN L232 SmtUtils]: Spent 38.97s on a formula simplification. DAG size of input: 180 DAG size of output: 49 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-23 23:06:51,118 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 23:06:56,171 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 23:07:26,336 WARN L232 SmtUtils]: Spent 18.94s on a formula simplification. DAG size of input: 143 DAG size of output: 46 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-23 23:07:39,443 WARN L232 SmtUtils]: Spent 9.18s on a formula simplification. DAG size of input: 67 DAG size of output: 37 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-23 23:08:45,624 WARN L232 SmtUtils]: Spent 52.90s on a formula simplification. DAG size of input: 167 DAG size of output: 100 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-23 23:09:22,882 WARN L232 SmtUtils]: Spent 30.17s on a formula simplification. DAG size of input: 187 DAG size of output: 65 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-23 23:09:44,758 WARN L232 SmtUtils]: Spent 15.18s on a formula simplification. DAG size of input: 136 DAG size of output: 39 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-23 23:10:18,209 WARN L232 SmtUtils]: Spent 24.97s on a formula simplification. DAG size of input: 138 DAG size of output: 88 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-23 23:10:19,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 23:10:19,129 INFO L93 Difference]: Finished difference Result 311 states and 400 transitions. [2022-02-23 23:10:19,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-23 23:10:19,130 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 20 states have internal predecessors, (60), 11 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (29), 10 states have call predecessors, (29), 9 states have call successors, (29) Word has length 100 [2022-02-23 23:10:19,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 23:10:19,131 INFO L225 Difference]: With dead ends: 311 [2022-02-23 23:10:19,131 INFO L226 Difference]: Without dead ends: 283 [2022-02-23 23:10:19,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 174 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 236.7s TimeCoverageRelationStatistics Valid=274, Invalid=1284, Unknown=2, NotChecked=0, Total=1560 [2022-02-23 23:10:19,132 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 197 mSDsluCounter, 751 mSDsCounter, 0 mSdLazyCounter, 1087 mSolverCounterSat, 296 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 814 SdHoareTripleChecker+Invalid, 1383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 296 IncrementalHoareTripleChecker+Valid, 1087 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.8s IncrementalHoareTripleChecker+Time [2022-02-23 23:10:19,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 814 Invalid, 1383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [296 Valid, 1087 Invalid, 0 Unknown, 0 Unchecked, 30.8s Time] [2022-02-23 23:10:19,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-02-23 23:10:19,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 245. [2022-02-23 23:10:19,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 163 states have (on average 1.177914110429448) internal successors, (192), 170 states have internal predecessors, (192), 53 states have call successors, (53), 29 states have call predecessors, (53), 28 states have return successors, (51), 45 states have call predecessors, (51), 51 states have call successors, (51) [2022-02-23 23:10:19,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 296 transitions. [2022-02-23 23:10:19,154 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 296 transitions. Word has length 100 [2022-02-23 23:10:19,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 23:10:19,155 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 296 transitions. [2022-02-23 23:10:19,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 20 states have internal predecessors, (60), 11 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (29), 10 states have call predecessors, (29), 9 states have call successors, (29) [2022-02-23 23:10:19,156 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 296 transitions. [2022-02-23 23:10:19,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-02-23 23:10:19,159 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 23:10:19,159 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-02-23 23:10:19,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-02-23 23:10:19,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:10:19,375 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 23:10:19,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 23:10:19,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1055508743, now seen corresponding path program 1 times [2022-02-23 23:10:19,375 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 23:10:19,375 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395755572] [2022-02-23 23:10:19,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:10:19,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 23:10:19,381 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 23:10:19,381 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1071745885] [2022-02-23 23:10:19,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:10:19,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:10:19,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 23:10:19,386 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 23:10:19,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-02-23 23:10:19,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:10:19,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-23 23:10:19,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 23:10:19,585 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 120 proven. 260 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-02-23 23:10:19,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 23:10:19,748 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 28 proven. 44 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2022-02-23 23:10:19,748 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 23:10:19,748 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395755572] [2022-02-23 23:10:19,748 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 23:10:19,748 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071745885] [2022-02-23 23:10:19,748 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071745885] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 23:10:19,748 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 23:10:19,748 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-02-23 23:10:19,748 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468556817] [2022-02-23 23:10:19,748 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 23:10:19,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-23 23:10:19,749 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 23:10:19,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-23 23:10:19,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-02-23 23:10:19,749 INFO L87 Difference]: Start difference. First operand 245 states and 296 transitions. Second operand has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 14 states have internal predecessors, (67), 12 states have call successors, (34), 8 states have call predecessors, (34), 8 states have return successors, (32), 11 states have call predecessors, (32), 12 states have call successors, (32) [2022-02-23 23:10:20,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 23:10:20,164 INFO L93 Difference]: Finished difference Result 578 states and 711 transitions. [2022-02-23 23:10:20,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-23 23:10:20,165 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 14 states have internal predecessors, (67), 12 states have call successors, (34), 8 states have call predecessors, (34), 8 states have return successors, (32), 11 states have call predecessors, (32), 12 states have call successors, (32) Word has length 106 [2022-02-23 23:10:20,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 23:10:20,168 INFO L225 Difference]: With dead ends: 578 [2022-02-23 23:10:20,168 INFO L226 Difference]: Without dead ends: 503 [2022-02-23 23:10:20,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2022-02-23 23:10:20,170 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 221 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-23 23:10:20,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 398 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-23 23:10:20,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2022-02-23 23:10:20,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 484. [2022-02-23 23:10:20,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 317 states have (on average 1.1892744479495267) internal successors, (377), 340 states have internal predecessors, (377), 107 states have call successors, (107), 60 states have call predecessors, (107), 59 states have return successors, (101), 83 states have call predecessors, (101), 101 states have call successors, (101) [2022-02-23 23:10:20,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 585 transitions. [2022-02-23 23:10:20,217 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 585 transitions. Word has length 106 [2022-02-23 23:10:20,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 23:10:20,217 INFO L470 AbstractCegarLoop]: Abstraction has 484 states and 585 transitions. [2022-02-23 23:10:20,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 14 states have internal predecessors, (67), 12 states have call successors, (34), 8 states have call predecessors, (34), 8 states have return successors, (32), 11 states have call predecessors, (32), 12 states have call successors, (32) [2022-02-23 23:10:20,217 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 585 transitions. [2022-02-23 23:10:20,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-02-23 23:10:20,218 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 23:10:20,218 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 23:10:20,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-02-23 23:10:20,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-02-23 23:10:20,434 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 23:10:20,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 23:10:20,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1401143091, now seen corresponding path program 2 times [2022-02-23 23:10:20,435 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 23:10:20,435 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946734661] [2022-02-23 23:10:20,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:10:20,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 23:10:20,443 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 23:10:20,443 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2127142288] [2022-02-23 23:10:20,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 23:10:20,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:10:20,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 23:10:20,444 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 23:10:20,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-02-23 23:10:20,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 23:10:20,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 23:10:20,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 44 conjunts are in the unsatisfiable core [2022-02-23 23:10:20,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 23:10:21,312 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-23 23:10:21,805 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 71 proven. 35 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2022-02-23 23:10:21,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 23:10:30,249 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 71 proven. 35 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2022-02-23 23:10:30,249 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 23:10:30,249 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946734661] [2022-02-23 23:10:30,249 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 23:10:30,249 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127142288] [2022-02-23 23:10:30,249 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127142288] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 23:10:30,249 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 23:10:30,249 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 26 [2022-02-23 23:10:30,249 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307599804] [2022-02-23 23:10:30,249 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 23:10:30,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-23 23:10:30,250 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 23:10:30,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-23 23:10:30,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2022-02-23 23:10:30,250 INFO L87 Difference]: Start difference. First operand 484 states and 585 transitions. Second operand has 26 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 15 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (32), 15 states have call predecessors, (32), 13 states have call successors, (32) [2022-02-23 23:10:36,602 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 [] [2022-02-23 23:10:45,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 23:10:45,546 INFO L93 Difference]: Finished difference Result 616 states and 756 transitions. [2022-02-23 23:10:45,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-23 23:10:45,546 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 15 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (32), 15 states have call predecessors, (32), 13 states have call successors, (32) Word has length 111 [2022-02-23 23:10:45,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 23:10:45,548 INFO L225 Difference]: With dead ends: 616 [2022-02-23 23:10:45,548 INFO L226 Difference]: Without dead ends: 495 [2022-02-23 23:10:45,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 195 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=374, Invalid=1108, Unknown=0, NotChecked=0, Total=1482 [2022-02-23 23:10:45,549 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 151 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 767 mSolverCounterSat, 256 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 570 SdHoareTripleChecker+Invalid, 1024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 767 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2022-02-23 23:10:45,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 570 Invalid, 1024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 767 Invalid, 1 Unknown, 0 Unchecked, 8.1s Time] [2022-02-23 23:10:45,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-02-23 23:10:45,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 440. [2022-02-23 23:10:45,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 288 states have (on average 1.1840277777777777) internal successors, (341), 309 states have internal predecessors, (341), 96 states have call successors, (96), 56 states have call predecessors, (96), 55 states have return successors, (91), 74 states have call predecessors, (91), 91 states have call successors, (91) [2022-02-23 23:10:45,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 528 transitions. [2022-02-23 23:10:45,608 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 528 transitions. Word has length 111 [2022-02-23 23:10:45,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 23:10:45,610 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 528 transitions. [2022-02-23 23:10:45,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 15 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (32), 15 states have call predecessors, (32), 13 states have call successors, (32) [2022-02-23 23:10:45,610 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 528 transitions. [2022-02-23 23:10:45,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-02-23 23:10:45,611 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 23:10:45,611 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 23:10:45,627 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-02-23 23:10:45,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:10:45,826 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 23:10:45,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 23:10:45,826 INFO L85 PathProgramCache]: Analyzing trace with hash 220761538, now seen corresponding path program 1 times [2022-02-23 23:10:45,826 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 23:10:45,826 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189738699] [2022-02-23 23:10:45,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:10:45,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 23:10:45,834 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 23:10:45,835 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1759603032] [2022-02-23 23:10:45,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:10:45,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:10:45,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 23:10:45,836 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 23:10:45,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-02-23 23:10:45,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:10:45,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-23 23:10:45,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 23:10:46,115 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 32 proven. 470 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-02-23 23:10:46,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 23:10:46,352 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 32 proven. 46 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-02-23 23:10:46,352 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 23:10:46,352 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189738699] [2022-02-23 23:10:46,352 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 23:10:46,352 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759603032] [2022-02-23 23:10:46,352 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759603032] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 23:10:46,352 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 23:10:46,352 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-02-23 23:10:46,352 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338452078] [2022-02-23 23:10:46,352 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 23:10:46,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-23 23:10:46,353 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 23:10:46,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-23 23:10:46,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-02-23 23:10:46,354 INFO L87 Difference]: Start difference. First operand 440 states and 528 transitions. Second operand has 18 states, 18 states have (on average 4.555555555555555) internal successors, (82), 18 states have internal predecessors, (82), 16 states have call successors, (38), 10 states have call predecessors, (38), 9 states have return successors, (36), 14 states have call predecessors, (36), 15 states have call successors, (36) [2022-02-23 23:10:47,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 23:10:47,057 INFO L93 Difference]: Finished difference Result 809 states and 984 transitions. [2022-02-23 23:10:47,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-23 23:10:47,058 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.555555555555555) internal successors, (82), 18 states have internal predecessors, (82), 16 states have call successors, (38), 10 states have call predecessors, (38), 9 states have return successors, (36), 14 states have call predecessors, (36), 15 states have call successors, (36) Word has length 118 [2022-02-23 23:10:47,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 23:10:47,060 INFO L225 Difference]: With dead ends: 809 [2022-02-23 23:10:47,060 INFO L226 Difference]: Without dead ends: 761 [2022-02-23 23:10:47,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=236, Invalid=466, Unknown=0, NotChecked=0, Total=702 [2022-02-23 23:10:47,061 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 281 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-23 23:10:47,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 520 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-23 23:10:47,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2022-02-23 23:10:47,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 746. [2022-02-23 23:10:47,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 500 states have (on average 1.128) internal successors, (564), 531 states have internal predecessors, (564), 159 states have call successors, (159), 88 states have call predecessors, (159), 86 states have return successors, (150), 126 states have call predecessors, (150), 150 states have call successors, (150) [2022-02-23 23:10:47,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 873 transitions. [2022-02-23 23:10:47,143 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 873 transitions. Word has length 118 [2022-02-23 23:10:47,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 23:10:47,143 INFO L470 AbstractCegarLoop]: Abstraction has 746 states and 873 transitions. [2022-02-23 23:10:47,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.555555555555555) internal successors, (82), 18 states have internal predecessors, (82), 16 states have call successors, (38), 10 states have call predecessors, (38), 9 states have return successors, (36), 14 states have call predecessors, (36), 15 states have call successors, (36) [2022-02-23 23:10:47,143 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 873 transitions. [2022-02-23 23:10:47,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-02-23 23:10:47,144 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 23:10:47,144 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 23:10:47,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-02-23 23:10:47,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:10:47,361 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 23:10:47,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 23:10:47,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1839670996, now seen corresponding path program 4 times [2022-02-23 23:10:47,362 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 23:10:47,362 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894446119] [2022-02-23 23:10:47,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:10:47,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 23:10:47,371 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 23:10:47,372 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1681290077] [2022-02-23 23:10:47,372 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-23 23:10:47,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:10:47,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 23:10:47,373 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 23:10:47,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-02-23 23:10:47,452 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-23 23:10:47,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 23:10:47,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 52 conjunts are in the unsatisfiable core [2022-02-23 23:10:47,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 23:10:48,573 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 36 proven. 63 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-02-23 23:10:48,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 23:11:51,418 WARN L232 SmtUtils]: Spent 7.63s on a formula simplification that was a NOOP. DAG size: 150 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-23 23:13:14,910 WARN L232 SmtUtils]: Spent 36.19s on a formula simplification that was a NOOP. DAG size: 453 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)