/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/cohencu-ll_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 11:02:59,247 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 11:02:59,278 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 11:02:59,295 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-06 11:02:59,296 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-06 11:02:59,296 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-06 11:02:59,297 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-06 11:02:59,298 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-06 11:02:59,299 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-06 11:02:59,300 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-06 11:02:59,300 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-06 11:02:59,301 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-06 11:02:59,301 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 11:02:59,302 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 11:02:59,302 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 11:02:59,303 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 11:02:59,303 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 11:02:59,304 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 11:02:59,305 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 11:02:59,306 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 11:02:59,307 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 11:02:59,307 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 11:02:59,308 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 11:02:59,309 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 11:02:59,309 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 11:02:59,311 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-06 11:02:59,316 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 11:02:59,317 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 11:02:59,317 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 11:02:59,318 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-04-06 11:02:59,332 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 11:02:59,332 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 11:02:59,332 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-06 11:02:59,332 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-06 11:02:59,333 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-06 11:02:59,333 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-06 11:02:59,333 INFO L138 SettingsManager]: * Use SBE=true [2022-04-06 11:02:59,333 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 11:02:59,333 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 11:02:59,334 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 11:02:59,334 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 11:02:59,334 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 11:02:59,334 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 11:02:59,334 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 11:02:59,334 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 11:02:59,334 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 11:02:59,335 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 11:02:59,335 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 11:02:59,335 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 11:02:59,335 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 11:02:59,335 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 11:02:59,335 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-06 11:02:59,335 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-06 11:02:59,336 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-06 11:02:59,336 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-06 11:02:59,336 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 11:02:59,336 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-06 11:02:59,336 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-06 11:02:59,337 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-06 11:02:59,337 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 11:02:59,506 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 11:02:59,526 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 11:02:59,527 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 11:02:59,528 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 11:02:59,529 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 11:02:59,530 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_unwindbound5.c [2022-04-06 11:02:59,577 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0b48a971/ddbc8fa8fbef4eda8be93b8ad338a4c6/FLAG862990d53 [2022-04-06 11:02:59,924 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 11:02:59,924 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_unwindbound5.c [2022-04-06 11:02:59,928 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0b48a971/ddbc8fa8fbef4eda8be93b8ad338a4c6/FLAG862990d53 [2022-04-06 11:02:59,936 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0b48a971/ddbc8fa8fbef4eda8be93b8ad338a4c6 [2022-04-06 11:02:59,938 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 11:02:59,939 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-06 11:02:59,940 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 11:02:59,940 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 11:02:59,941 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 11:02:59,942 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 11:02:59" (1/1) ... [2022-04-06 11:02:59,942 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d8ded71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:02:59, skipping insertion in model container [2022-04-06 11:02:59,943 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 11:02:59" (1/1) ... [2022-04-06 11:02:59,946 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 11:02:59,954 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 11:03:00,060 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/cohencu-ll_unwindbound5.c[588,601] [2022-04-06 11:03:00,074 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 11:03:00,078 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 11:03:00,085 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/cohencu-ll_unwindbound5.c[588,601] [2022-04-06 11:03:00,092 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 11:03:00,099 INFO L208 MainTranslator]: Completed translation [2022-04-06 11:03:00,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:03:00 WrapperNode [2022-04-06 11:03:00,099 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 11:03:00,100 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 11:03:00,100 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 11:03:00,100 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 11:03:00,106 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:03:00" (1/1) ... [2022-04-06 11:03:00,106 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:03:00" (1/1) ... [2022-04-06 11:03:00,110 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:03:00" (1/1) ... [2022-04-06 11:03:00,110 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:03:00" (1/1) ... [2022-04-06 11:03:00,113 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:03:00" (1/1) ... [2022-04-06 11:03:00,115 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:03:00" (1/1) ... [2022-04-06 11:03:00,116 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:03:00" (1/1) ... [2022-04-06 11:03:00,117 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 11:03:00,117 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 11:03:00,117 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 11:03:00,117 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 11:03:00,118 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:03:00" (1/1) ... [2022-04-06 11:03:00,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 11:03:00,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:03:00,137 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) [2022-04-06 11:03:00,142 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 [2022-04-06 11:03:00,165 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 11:03:00,165 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 11:03:00,165 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 11:03:00,165 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 11:03:00,165 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 11:03:00,166 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 11:03:00,166 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 11:03:00,166 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 11:03:00,166 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 11:03:00,166 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 11:03:00,166 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ushort [2022-04-06 11:03:00,166 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 11:03:00,171 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 11:03:00,171 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 11:03:00,171 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 11:03:00,171 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 11:03:00,171 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 11:03:00,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 11:03:00,172 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 11:03:00,172 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 11:03:00,213 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 11:03:00,214 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 11:03:00,354 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 11:03:00,358 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 11:03:00,358 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 11:03:00,359 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 11:03:00 BoogieIcfgContainer [2022-04-06 11:03:00,360 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 11:03:00,360 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-06 11:03:00,360 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-06 11:03:00,376 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-06 11:03:00,378 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 11:03:00" (1/1) ... [2022-04-06 11:03:00,379 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-04-06 11:03:00,390 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 11:03:00 BasicIcfg [2022-04-06 11:03:00,390 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-06 11:03:00,398 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 11:03:00,398 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 11:03:00,400 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 11:03:00,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 11:02:59" (1/4) ... [2022-04-06 11:03:00,401 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b2f3a58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 11:03:00, skipping insertion in model container [2022-04-06 11:03:00,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:03:00" (2/4) ... [2022-04-06 11:03:00,401 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b2f3a58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 11:03:00, skipping insertion in model container [2022-04-06 11:03:00,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 11:03:00" (3/4) ... [2022-04-06 11:03:00,402 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b2f3a58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 11:03:00, skipping insertion in model container [2022-04-06 11:03:00,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 11:03:00" (4/4) ... [2022-04-06 11:03:00,419 INFO L111 eAbstractionObserver]: Analyzing ICFG cohencu-ll_unwindbound5.cqvasr [2022-04-06 11:03:00,422 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-06 11:03:00,423 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 11:03:00,449 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 11:03:00,453 INFO L340 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 [2022-04-06 11:03:00,453 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 11:03:00,482 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-06 11:03:00,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-04-06 11:03:00,485 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:03:00,486 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:03:00,486 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:03:00,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:03:00,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1427487266, now seen corresponding path program 1 times [2022-04-06 11:03:00,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:03:00,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422681429] [2022-04-06 11:03:00,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:03:00,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:03:00,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:03:00,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 11:03:00,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:03:00,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 11:03:00,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:03:00,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422681429] [2022-04-06 11:03:00,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422681429] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 11:03:00,658 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 11:03:00,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 11:03:00,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500267022] [2022-04-06 11:03:00,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 11:03:00,662 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 11:03:00,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:03:00,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 11:03:00,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 11:03:00,685 INFO L87 Difference]: Start difference. First operand has 31 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 11:03:00,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:03:00,790 INFO L93 Difference]: Finished difference Result 57 states and 95 transitions. [2022-04-06 11:03:00,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 11:03:00,791 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-04-06 11:03:00,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:03:00,796 INFO L225 Difference]: With dead ends: 57 [2022-04-06 11:03:00,796 INFO L226 Difference]: Without dead ends: 27 [2022-04-06 11:03:00,799 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 11:03:00,802 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 11:03:00,802 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 45 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 11:03:00,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-04-06 11:03:00,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-04-06 11:03:00,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 13 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 11:03:00,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2022-04-06 11:03:00,836 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 11 [2022-04-06 11:03:00,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:03:00,837 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2022-04-06 11:03:00,837 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 11:03:00,837 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2022-04-06 11:03:00,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-06 11:03:00,838 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:03:00,838 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:03:00,838 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 11:03:00,839 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:03:00,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:03:00,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1331862890, now seen corresponding path program 1 times [2022-04-06 11:03:00,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:03:00,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322977434] [2022-04-06 11:03:00,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:03:00,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:03:00,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:03:00,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 11:03:00,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:03:00,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 11:03:00,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:03:00,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322977434] [2022-04-06 11:03:00,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322977434] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 11:03:00,952 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 11:03:00,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 11:03:00,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608991825] [2022-04-06 11:03:00,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 11:03:00,953 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 11:03:00,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:03:00,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 11:03:00,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 11:03:00,954 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 11:03:01,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:03:01,040 INFO L93 Difference]: Finished difference Result 40 states and 56 transitions. [2022-04-06 11:03:01,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 11:03:01,041 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-04-06 11:03:01,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:03:01,043 INFO L225 Difference]: With dead ends: 40 [2022-04-06 11:03:01,043 INFO L226 Difference]: Without dead ends: 28 [2022-04-06 11:03:01,047 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 11:03:01,048 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 6 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 11:03:01,049 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 69 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 11:03:01,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-04-06 11:03:01,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-04-06 11:03:01,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 13 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 11:03:01,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 39 transitions. [2022-04-06 11:03:01,055 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 39 transitions. Word has length 12 [2022-04-06 11:03:01,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:03:01,056 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 39 transitions. [2022-04-06 11:03:01,056 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 11:03:01,056 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 39 transitions. [2022-04-06 11:03:01,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-06 11:03:01,056 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:03:01,056 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:03:01,056 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 11:03:01,056 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:03:01,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:03:01,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1332935366, now seen corresponding path program 1 times [2022-04-06 11:03:01,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:03:01,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721960496] [2022-04-06 11:03:01,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:03:01,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:03:01,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:03:01,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 11:03:01,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:03:01,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 11:03:01,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:03:01,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721960496] [2022-04-06 11:03:01,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721960496] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 11:03:01,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 11:03:01,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 11:03:01,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966230396] [2022-04-06 11:03:01,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 11:03:01,205 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 11:03:01,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:03:01,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 11:03:01,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 11:03:01,206 INFO L87 Difference]: Start difference. First operand 28 states and 39 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 11:03:01,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:03:01,317 INFO L93 Difference]: Finished difference Result 34 states and 44 transitions. [2022-04-06 11:03:01,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 11:03:01,317 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-04-06 11:03:01,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:03:01,318 INFO L225 Difference]: With dead ends: 34 [2022-04-06 11:03:01,318 INFO L226 Difference]: Without dead ends: 32 [2022-04-06 11:03:01,318 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-04-06 11:03:01,319 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 17 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 11:03:01,319 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 51 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 11:03:01,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-04-06 11:03:01,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-04-06 11:03:01,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 11:03:01,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2022-04-06 11:03:01,329 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 12 [2022-04-06 11:03:01,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:03:01,330 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2022-04-06 11:03:01,330 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 11:03:01,330 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2022-04-06 11:03:01,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 11:03:01,330 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:03:01,330 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:03:01,331 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-04-06 11:03:01,331 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:03:01,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:03:01,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1273314772, now seen corresponding path program 1 times [2022-04-06 11:03:01,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:03:01,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527291630] [2022-04-06 11:03:01,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:03:01,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:03:01,339 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:03:01,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [9957325] [2022-04-06 11:03:01,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:03:01,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:03:01,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:03:01,348 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) [2022-04-06 11:03:01,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 11:03:01,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:03:01,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 11:03:01,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:03:01,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 11:03:01,495 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 11:03:01,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:03:01,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527291630] [2022-04-06 11:03:01,496 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:03:01,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9957325] [2022-04-06 11:03:01,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9957325] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 11:03:01,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 11:03:01,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 11:03:01,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125731414] [2022-04-06 11:03:01,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 11:03:01,497 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 11:03:01,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:03:01,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 11:03:01,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 11:03:01,497 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 11:03:01,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:03:01,558 INFO L93 Difference]: Finished difference Result 50 states and 70 transitions. [2022-04-06 11:03:01,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 11:03:01,558 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2022-04-06 11:03:01,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:03:01,561 INFO L225 Difference]: With dead ends: 50 [2022-04-06 11:03:01,561 INFO L226 Difference]: Without dead ends: 48 [2022-04-06 11:03:01,562 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 11:03:01,562 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 6 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 11:03:01,563 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 137 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 11:03:01,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-04-06 11:03:01,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38. [2022-04-06 11:03:01,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 20 states have internal predecessors, (21), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-06 11:03:01,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 49 transitions. [2022-04-06 11:03:01,575 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 49 transitions. Word has length 17 [2022-04-06 11:03:01,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:03:01,576 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 49 transitions. [2022-04-06 11:03:01,576 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 11:03:01,576 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 49 transitions. [2022-04-06 11:03:01,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-06 11:03:01,576 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:03:01,576 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:03:01,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 11:03:01,777 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:03:01,777 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:03:01,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:03:01,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1649805282, now seen corresponding path program 1 times [2022-04-06 11:03:01,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:03:01,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36998369] [2022-04-06 11:03:01,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:03:01,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:03:01,785 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:03:01,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1199687801] [2022-04-06 11:03:01,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:03:01,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:03:01,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:03:01,788 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) [2022-04-06 11:03:01,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 11:03:01,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:03:01,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 11:03:01,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:03:01,889 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 11:03:01,889 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 11:03:01,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:03:01,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36998369] [2022-04-06 11:03:01,890 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:03:01,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199687801] [2022-04-06 11:03:01,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199687801] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 11:03:01,890 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 11:03:01,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 11:03:01,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412431103] [2022-04-06 11:03:01,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 11:03:01,890 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 11:03:01,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:03:01,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 11:03:01,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 11:03:01,891 INFO L87 Difference]: Start difference. First operand 38 states and 49 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 11:03:01,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:03:01,942 INFO L93 Difference]: Finished difference Result 54 states and 73 transitions. [2022-04-06 11:03:01,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 11:03:01,943 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 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 22 [2022-04-06 11:03:01,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:03:01,945 INFO L225 Difference]: With dead ends: 54 [2022-04-06 11:03:01,945 INFO L226 Difference]: Without dead ends: 52 [2022-04-06 11:03:01,945 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 11:03:01,947 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 6 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 11:03:01,948 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 142 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 11:03:01,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-04-06 11:03:01,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2022-04-06 11:03:01,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 20 states have call successors, (20), 6 states have call predecessors, (20), 5 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 11:03:01,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 64 transitions. [2022-04-06 11:03:01,963 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 64 transitions. Word has length 22 [2022-04-06 11:03:01,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:03:01,963 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 64 transitions. [2022-04-06 11:03:01,963 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 11:03:01,963 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 64 transitions. [2022-04-06 11:03:01,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-06 11:03:01,964 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:03:01,964 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:03:01,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 11:03:02,171 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:03:02,172 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:03:02,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:03:02,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1442767915, now seen corresponding path program 1 times [2022-04-06 11:03:02,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:03:02,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818108126] [2022-04-06 11:03:02,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:03:02,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:03:02,179 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:03:02,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1032909173] [2022-04-06 11:03:02,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:03:02,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:03:02,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:03:02,186 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) [2022-04-06 11:03:02,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 11:03:02,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:03:02,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 11:03:02,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:03:02,315 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 11:03:02,316 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 11:03:02,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:03:02,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818108126] [2022-04-06 11:03:02,316 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:03:02,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032909173] [2022-04-06 11:03:02,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032909173] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 11:03:02,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 11:03:02,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 11:03:02,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180959798] [2022-04-06 11:03:02,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 11:03:02,317 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 11:03:02,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:03:02,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 11:03:02,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 11:03:02,317 INFO L87 Difference]: Start difference. First operand 48 states and 64 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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) [2022-04-06 11:03:02,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:03:02,373 INFO L93 Difference]: Finished difference Result 62 states and 79 transitions. [2022-04-06 11:03:02,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 11:03:02,374 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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 27 [2022-04-06 11:03:02,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:03:02,374 INFO L225 Difference]: With dead ends: 62 [2022-04-06 11:03:02,374 INFO L226 Difference]: Without dead ends: 50 [2022-04-06 11:03:02,375 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 11:03:02,375 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 6 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 11:03:02,375 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 130 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 11:03:02,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-04-06 11:03:02,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-04-06 11:03:02,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 25 states have (on average 1.12) internal successors, (28), 26 states have internal predecessors, (28), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 11:03:02,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2022-04-06 11:03:02,380 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 27 [2022-04-06 11:03:02,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:03:02,381 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2022-04-06 11:03:02,381 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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) [2022-04-06 11:03:02,381 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2022-04-06 11:03:02,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-06 11:03:02,381 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:03:02,382 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 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] [2022-04-06 11:03:02,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 11:03:02,595 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:03:02,596 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:03:02,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:03:02,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1251454759, now seen corresponding path program 1 times [2022-04-06 11:03:02,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:03:02,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333767546] [2022-04-06 11:03:02,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:03:02,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:03:02,617 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:03:02,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1970054854] [2022-04-06 11:03:02,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:03:02,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:03:02,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:03:02,622 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) [2022-04-06 11:03:02,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 11:03:02,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:03:02,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 11:03:02,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:03:02,735 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-06 11:03:02,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:03:02,815 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 11:03:02,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:03:02,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333767546] [2022-04-06 11:03:02,816 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:03:02,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970054854] [2022-04-06 11:03:02,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970054854] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 11:03:02,816 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 11:03:02,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-04-06 11:03:02,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380693711] [2022-04-06 11:03:02,816 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 11:03:02,816 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 11:03:02,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:03:02,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 11:03:02,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-04-06 11:03:02,817 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 6 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2022-04-06 11:03:02,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:03:02,914 INFO L93 Difference]: Finished difference Result 120 states and 155 transitions. [2022-04-06 11:03:02,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 11:03:02,915 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 6 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) Word has length 45 [2022-04-06 11:03:02,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:03:02,917 INFO L225 Difference]: With dead ends: 120 [2022-04-06 11:03:02,917 INFO L226 Difference]: Without dead ends: 104 [2022-04-06 11:03:02,920 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-04-06 11:03:02,920 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 58 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 11:03:02,920 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 238 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 11:03:02,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-04-06 11:03:02,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2022-04-06 11:03:02,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 51 states have internal predecessors, (55), 40 states have call successors, (40), 12 states have call predecessors, (40), 11 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-04-06 11:03:02,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 131 transitions. [2022-04-06 11:03:02,950 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 131 transitions. Word has length 45 [2022-04-06 11:03:02,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:03:02,951 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 131 transitions. [2022-04-06 11:03:02,951 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 6 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2022-04-06 11:03:02,951 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 131 transitions. [2022-04-06 11:03:02,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-06 11:03:02,953 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:03:02,953 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:03:02,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 11:03:03,164 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:03:03,164 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:03:03,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:03:03,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1899744846, now seen corresponding path program 1 times [2022-04-06 11:03:03,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:03:03,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933916912] [2022-04-06 11:03:03,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:03:03,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:03:03,171 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:03:03,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1247455833] [2022-04-06 11:03:03,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:03:03,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:03:03,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:03:03,172 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) [2022-04-06 11:03:03,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 11:03:03,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:03:03,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 11:03:03,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:03:03,330 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 11:03:03,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:03:03,430 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 11:03:03,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:03:03,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933916912] [2022-04-06 11:03:03,431 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:03:03,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247455833] [2022-04-06 11:03:03,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247455833] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 11:03:03,431 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 11:03:03,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-04-06 11:03:03,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563890795] [2022-04-06 11:03:03,431 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 11:03:03,431 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 11:03:03,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:03:03,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 11:03:03,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-04-06 11:03:03,432 INFO L87 Difference]: Start difference. First operand 100 states and 131 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-04-06 11:03:03,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:03:03,661 INFO L93 Difference]: Finished difference Result 118 states and 147 transitions. [2022-04-06 11:03:03,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 11:03:03,661 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 45 [2022-04-06 11:03:03,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:03:03,662 INFO L225 Difference]: With dead ends: 118 [2022-04-06 11:03:03,662 INFO L226 Difference]: Without dead ends: 116 [2022-04-06 11:03:03,663 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-04-06 11:03:03,663 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 12 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 11:03:03,663 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 116 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 11:03:03,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-04-06 11:03:03,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2022-04-06 11:03:03,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 60 states have (on average 1.1166666666666667) internal successors, (67), 63 states have internal predecessors, (67), 40 states have call successors, (40), 16 states have call predecessors, (40), 15 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-04-06 11:03:03,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 143 transitions. [2022-04-06 11:03:03,676 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 143 transitions. Word has length 45 [2022-04-06 11:03:03,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:03:03,676 INFO L478 AbstractCegarLoop]: Abstraction has 116 states and 143 transitions. [2022-04-06 11:03:03,676 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-04-06 11:03:03,677 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 143 transitions. [2022-04-06 11:03:03,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 11:03:03,677 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:03:03,677 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:03:03,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 11:03:03,894 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:03:03,895 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:03:03,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:03:03,895 INFO L85 PathProgramCache]: Analyzing trace with hash 400776220, now seen corresponding path program 2 times [2022-04-06 11:03:03,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:03:03,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028447475] [2022-04-06 11:03:03,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:03:03,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:03:03,901 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:03:03,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [314005877] [2022-04-06 11:03:03,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 11:03:03,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:03:03,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:03:03,908 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) [2022-04-06 11:03:03,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 11:03:03,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 11:03:03,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 11:03:03,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 11:03:03,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:03:04,068 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 11:03:04,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:03:04,150 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 11:03:04,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:03:04,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028447475] [2022-04-06 11:03:04,151 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:03:04,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314005877] [2022-04-06 11:03:04,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314005877] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 11:03:04,151 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 11:03:04,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-04-06 11:03:04,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594222088] [2022-04-06 11:03:04,151 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 11:03:04,151 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 11:03:04,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:03:04,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 11:03:04,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-04-06 11:03:04,152 INFO L87 Difference]: Start difference. First operand 116 states and 143 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-04-06 11:03:04,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:03:04,242 INFO L93 Difference]: Finished difference Result 122 states and 148 transitions. [2022-04-06 11:03:04,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 11:03:04,243 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 50 [2022-04-06 11:03:04,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:03:04,243 INFO L225 Difference]: With dead ends: 122 [2022-04-06 11:03:04,244 INFO L226 Difference]: Without dead ends: 120 [2022-04-06 11:03:04,244 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-04-06 11:03:04,244 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 6 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 11:03:04,244 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 208 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 11:03:04,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-04-06 11:03:04,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2022-04-06 11:03:04,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 63 states have (on average 1.1111111111111112) internal successors, (70), 66 states have internal predecessors, (70), 40 states have call successors, (40), 17 states have call predecessors, (40), 16 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-04-06 11:03:04,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 146 transitions. [2022-04-06 11:03:04,256 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 146 transitions. Word has length 50 [2022-04-06 11:03:04,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:03:04,256 INFO L478 AbstractCegarLoop]: Abstraction has 120 states and 146 transitions. [2022-04-06 11:03:04,256 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-04-06 11:03:04,256 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 146 transitions. [2022-04-06 11:03:04,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 11:03:04,257 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:03:04,257 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:03:04,273 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-04-06 11:03:04,472 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:03:04,473 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:03:04,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:03:04,473 INFO L85 PathProgramCache]: Analyzing trace with hash -895540175, now seen corresponding path program 3 times [2022-04-06 11:03:04,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:03:04,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369169431] [2022-04-06 11:03:04,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:03:04,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:03:04,479 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:03:04,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1160923133] [2022-04-06 11:03:04,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 11:03:04,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:03:04,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:03:04,480 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) [2022-04-06 11:03:04,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 11:03:04,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-04-06 11:03:04,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 11:03:04,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 11:03:04,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:03:04,644 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 11:03:04,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:03:04,968 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 11:03:04,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:03:04,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369169431] [2022-04-06 11:03:04,968 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:03:04,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160923133] [2022-04-06 11:03:04,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160923133] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 11:03:04,968 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 11:03:04,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-04-06 11:03:04,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965502754] [2022-04-06 11:03:04,969 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 11:03:04,969 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 11:03:04,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:03:04,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 11:03:04,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-06 11:03:04,969 INFO L87 Difference]: Start difference. First operand 120 states and 146 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2022-04-06 11:03:05,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:03:05,217 INFO L93 Difference]: Finished difference Result 146 states and 168 transitions. [2022-04-06 11:03:05,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 11:03:05,218 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) Word has length 55 [2022-04-06 11:03:05,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:03:05,218 INFO L225 Difference]: With dead ends: 146 [2022-04-06 11:03:05,218 INFO L226 Difference]: Without dead ends: 135 [2022-04-06 11:03:05,219 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-04-06 11:03:05,219 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 12 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 11:03:05,219 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 120 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 11:03:05,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-04-06 11:03:05,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2022-04-06 11:03:05,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 81 states have (on average 1.0864197530864197) internal successors, (88), 84 states have internal predecessors, (88), 31 states have call successors, (31), 23 states have call predecessors, (31), 22 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-04-06 11:03:05,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 146 transitions. [2022-04-06 11:03:05,230 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 146 transitions. Word has length 55 [2022-04-06 11:03:05,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:03:05,230 INFO L478 AbstractCegarLoop]: Abstraction has 135 states and 146 transitions. [2022-04-06 11:03:05,230 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2022-04-06 11:03:05,230 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 146 transitions. [2022-04-06 11:03:05,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-04-06 11:03:05,231 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:03:05,231 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 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] [2022-04-06 11:03:05,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 11:03:05,451 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:03:05,451 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:03:05,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:03:05,452 INFO L85 PathProgramCache]: Analyzing trace with hash 999510626, now seen corresponding path program 1 times [2022-04-06 11:03:05,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:03:05,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629017578] [2022-04-06 11:03:05,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:03:05,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:03:05,458 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:03:05,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [942522144] [2022-04-06 11:03:05,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:03:05,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:03:05,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:03:05,459 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) [2022-04-06 11:03:05,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 11:03:05,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:03:05,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-06 11:03:05,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:03:06,096 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 22 proven. 8 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-06 11:03:06,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:03:06,344 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 22 proven. 8 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-06 11:03:06,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:03:06,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629017578] [2022-04-06 11:03:06,345 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:03:06,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942522144] [2022-04-06 11:03:06,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942522144] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 11:03:06,345 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 11:03:06,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-04-06 11:03:06,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464972097] [2022-04-06 11:03:06,346 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 11:03:06,346 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 11:03:06,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:03:06,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 11:03:06,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-04-06 11:03:06,347 INFO L87 Difference]: Start difference. First operand 135 states and 146 transitions. Second operand has 10 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 7 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) [2022-04-06 11:03:06,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:03:06,596 INFO L93 Difference]: Finished difference Result 148 states and 160 transitions. [2022-04-06 11:03:06,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 11:03:06,596 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 7 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) Word has length 71 [2022-04-06 11:03:06,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:03:06,597 INFO L225 Difference]: With dead ends: 148 [2022-04-06 11:03:06,597 INFO L226 Difference]: Without dead ends: 144 [2022-04-06 11:03:06,597 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-04-06 11:03:06,598 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 10 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 11:03:06,598 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 189 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 11:03:06,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-04-06 11:03:06,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 141. [2022-04-06 11:03:06,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 86 states have (on average 1.069767441860465) internal successors, (92), 88 states have internal predecessors, (92), 31 states have call successors, (31), 25 states have call predecessors, (31), 23 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-04-06 11:03:06,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 150 transitions. [2022-04-06 11:03:06,610 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 150 transitions. Word has length 71 [2022-04-06 11:03:06,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:03:06,611 INFO L478 AbstractCegarLoop]: Abstraction has 141 states and 150 transitions. [2022-04-06 11:03:06,611 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 7 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) [2022-04-06 11:03:06,611 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 150 transitions. [2022-04-06 11:03:06,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-04-06 11:03:06,611 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:03:06,611 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 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] [2022-04-06 11:03:06,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 11:03:06,828 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-04-06 11:03:06,828 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:03:06,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:03:06,828 INFO L85 PathProgramCache]: Analyzing trace with hash -601883655, now seen corresponding path program 1 times [2022-04-06 11:03:06,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:03:06,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529517562] [2022-04-06 11:03:06,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:03:06,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:03:06,835 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:03:06,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [106278069] [2022-04-06 11:03:06,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:03:06,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:03:06,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:03:06,838 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) [2022-04-06 11:03:06,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 11:03:06,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:03:06,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 11:03:06,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:03:07,103 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 24 proven. 8 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-06 11:03:07,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:03:07,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:03:07,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529517562] [2022-04-06 11:03:07,346 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:03:07,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106278069] [2022-04-06 11:03:07,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106278069] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 11:03:07,346 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 11:03:07,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-04-06 11:03:07,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576217928] [2022-04-06 11:03:07,346 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-06 11:03:07,347 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 11:03:07,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:03:07,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 11:03:07,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-04-06 11:03:07,347 INFO L87 Difference]: Start difference. First operand 141 states and 150 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-04-06 11:03:07,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:03:07,437 INFO L93 Difference]: Finished difference Result 143 states and 151 transitions. [2022-04-06 11:03:07,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 11:03:07,438 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 76 [2022-04-06 11:03:07,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:03:07,439 INFO L225 Difference]: With dead ends: 143 [2022-04-06 11:03:07,439 INFO L226 Difference]: Without dead ends: 132 [2022-04-06 11:03:07,439 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-04-06 11:03:07,439 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 6 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 11:03:07,439 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 177 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 11:03:07,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-04-06 11:03:07,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2022-04-06 11:03:07,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 81 states have (on average 1.0617283950617284) internal successors, (86), 83 states have internal predecessors, (86), 28 states have call successors, (28), 23 states have call predecessors, (28), 22 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-04-06 11:03:07,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 139 transitions. [2022-04-06 11:03:07,450 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 139 transitions. Word has length 76 [2022-04-06 11:03:07,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:03:07,450 INFO L478 AbstractCegarLoop]: Abstraction has 132 states and 139 transitions. [2022-04-06 11:03:07,450 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-04-06 11:03:07,450 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 139 transitions. [2022-04-06 11:03:07,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-04-06 11:03:07,450 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:03:07,451 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:03:07,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 11:03:07,666 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:03:07,667 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:03:07,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:03:07,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1157335722, now seen corresponding path program 4 times [2022-04-06 11:03:07,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:03:07,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130581688] [2022-04-06 11:03:07,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:03:07,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:03:07,672 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:03:07,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1943452584] [2022-04-06 11:03:07,673 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 11:03:07,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:03:07,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:03:07,673 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) [2022-04-06 11:03:07,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 11:03:08,681 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 11:03:08,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 11:03:08,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 59 conjunts are in the unsatisfiable core [2022-04-06 11:03:08,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:03:09,282 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 86 proven. 47 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2022-04-06 11:03:09,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:03:09,869 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 111 proven. 6 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2022-04-06 11:03:09,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:03:09,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130581688] [2022-04-06 11:03:09,870 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:03:09,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943452584] [2022-04-06 11:03:09,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943452584] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 11:03:09,870 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 11:03:09,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2022-04-06 11:03:09,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467616285] [2022-04-06 11:03:09,870 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 11:03:09,870 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 11:03:09,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:03:09,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 11:03:09,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-04-06 11:03:09,871 INFO L87 Difference]: Start difference. First operand 132 states and 139 transitions. Second operand has 13 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (20), 7 states have call predecessors, (20), 6 states have call successors, (20) [2022-04-06 11:03:10,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:03:10,407 INFO L93 Difference]: Finished difference Result 142 states and 148 transitions. [2022-04-06 11:03:10,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 11:03:10,407 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (20), 7 states have call predecessors, (20), 6 states have call successors, (20) Word has length 78 [2022-04-06 11:03:10,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:03:10,408 INFO L225 Difference]: With dead ends: 142 [2022-04-06 11:03:10,408 INFO L226 Difference]: Without dead ends: 138 [2022-04-06 11:03:10,408 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 139 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-04-06 11:03:10,409 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 24 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 11:03:10,409 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 85 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 11:03:10,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-04-06 11:03:10,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2022-04-06 11:03:10,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 86 states have (on average 1.0465116279069768) internal successors, (90), 87 states have internal predecessors, (90), 28 states have call successors, (28), 25 states have call predecessors, (28), 23 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-04-06 11:03:10,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 143 transitions. [2022-04-06 11:03:10,421 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 143 transitions. Word has length 78 [2022-04-06 11:03:10,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:03:10,421 INFO L478 AbstractCegarLoop]: Abstraction has 138 states and 143 transitions. [2022-04-06 11:03:10,421 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (20), 7 states have call predecessors, (20), 6 states have call successors, (20) [2022-04-06 11:03:10,421 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 143 transitions. [2022-04-06 11:03:10,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-04-06 11:03:10,422 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:03:10,422 INFO L499 BasicCegarLoop]: trace histogram [18, 17, 17, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:03:10,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-06 11:03:10,622 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-04-06 11:03:10,622 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:03:10,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:03:10,623 INFO L85 PathProgramCache]: Analyzing trace with hash -821976909, now seen corresponding path program 2 times [2022-04-06 11:03:10,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:03:10,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972827449] [2022-04-06 11:03:10,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:03:10,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:03:10,629 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:03:10,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1698610103] [2022-04-06 11:03:10,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 11:03:10,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:03:10,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:03:10,630 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) [2022-04-06 11:03:10,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 11:03:10,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 11:03:10,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 11:03:10,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 11:03:10,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:03:11,000 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 34 proven. 24 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-04-06 11:03:11,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:03:11,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:03:11,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972827449] [2022-04-06 11:03:11,156 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:03:11,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698610103] [2022-04-06 11:03:11,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698610103] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 11:03:11,156 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 11:03:11,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-04-06 11:03:11,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709856469] [2022-04-06 11:03:11,156 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-06 11:03:11,156 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 11:03:11,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:03:11,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 11:03:11,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-04-06 11:03:11,157 INFO L87 Difference]: Start difference. First operand 138 states and 143 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-04-06 11:03:11,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:03:11,319 INFO L93 Difference]: Finished difference Result 140 states and 144 transitions. [2022-04-06 11:03:11,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 11:03:11,320 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) Word has length 104 [2022-04-06 11:03:11,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:03:11,321 INFO L225 Difference]: With dead ends: 140 [2022-04-06 11:03:11,321 INFO L226 Difference]: Without dead ends: 129 [2022-04-06 11:03:11,321 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 137 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-04-06 11:03:11,321 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 6 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 11:03:11,321 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 187 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 11:03:11,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-04-06 11:03:11,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2022-04-06 11:03:11,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 81 states have (on average 1.037037037037037) internal successors, (84), 82 states have internal predecessors, (84), 25 states have call successors, (25), 23 states have call predecessors, (25), 22 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-04-06 11:03:11,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 132 transitions. [2022-04-06 11:03:11,331 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 132 transitions. Word has length 104 [2022-04-06 11:03:11,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:03:11,332 INFO L478 AbstractCegarLoop]: Abstraction has 129 states and 132 transitions. [2022-04-06 11:03:11,332 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-04-06 11:03:11,332 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 132 transitions. [2022-04-06 11:03:11,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-04-06 11:03:11,332 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:03:11,332 INFO L499 BasicCegarLoop]: trace histogram [22, 21, 21, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:03:11,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 11:03:11,548 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-04-06 11:03:11,549 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:03:11,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:03:11,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1992307858, now seen corresponding path program 2 times [2022-04-06 11:03:11,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:03:11,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457782516] [2022-04-06 11:03:11,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:03:11,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:03:11,560 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:03:11,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1034170557] [2022-04-06 11:03:11,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 11:03:11,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:03:11,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:03:11,562 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) [2022-04-06 11:03:11,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 11:03:11,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 11:03:11,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 11:03:11,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-06 11:03:11,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:03:12,042 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 42 proven. 48 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2022-04-06 11:03:12,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:03:12,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:03:12,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457782516] [2022-04-06 11:03:12,226 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:03:12,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034170557] [2022-04-06 11:03:12,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034170557] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 11:03:12,226 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 11:03:12,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-04-06 11:03:12,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608580130] [2022-04-06 11:03:12,226 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-06 11:03:12,226 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 11:03:12,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:03:12,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 11:03:12,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-04-06 11:03:12,227 INFO L87 Difference]: Start difference. First operand 129 states and 132 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2022-04-06 11:03:12,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:03:12,435 INFO L93 Difference]: Finished difference Result 152 states and 160 transitions. [2022-04-06 11:03:12,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 11:03:12,436 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) Word has length 127 [2022-04-06 11:03:12,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:03:12,437 INFO L225 Difference]: With dead ends: 152 [2022-04-06 11:03:12,437 INFO L226 Difference]: Without dead ends: 150 [2022-04-06 11:03:12,437 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 154 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-04-06 11:03:12,437 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 6 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 11:03:12,437 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 223 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 11:03:12,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-04-06 11:03:12,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2022-04-06 11:03:12,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 91 states have (on average 1.043956043956044) internal successors, (95), 93 states have internal predecessors, (95), 32 states have call successors, (32), 26 states have call predecessors, (32), 25 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2022-04-06 11:03:12,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 157 transitions. [2022-04-06 11:03:12,449 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 157 transitions. Word has length 127 [2022-04-06 11:03:12,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:03:12,449 INFO L478 AbstractCegarLoop]: Abstraction has 149 states and 157 transitions. [2022-04-06 11:03:12,450 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2022-04-06 11:03:12,450 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 157 transitions. [2022-04-06 11:03:12,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-04-06 11:03:12,450 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:03:12,450 INFO L499 BasicCegarLoop]: trace histogram [22, 21, 21, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:03:12,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-06 11:03:12,663 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-04-06 11:03:12,663 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:03:12,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:03:12,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1089028459, now seen corresponding path program 2 times [2022-04-06 11:03:12,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:03:12,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164375204] [2022-04-06 11:03:12,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:03:12,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:03:12,671 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:03:12,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1770998669] [2022-04-06 11:03:12,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 11:03:12,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:03:12,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:03:12,678 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) [2022-04-06 11:03:12,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-06 11:03:12,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 11:03:12,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 11:03:12,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 11:03:12,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:03:12,916 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 120 proven. 656 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-04-06 11:03:12,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:03:13,119 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 42 proven. 56 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2022-04-06 11:03:13,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:03:13,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164375204] [2022-04-06 11:03:13,120 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:03:13,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770998669] [2022-04-06 11:03:13,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770998669] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 11:03:13,120 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 11:03:13,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-04-06 11:03:13,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029119719] [2022-04-06 11:03:13,120 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 11:03:13,120 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 11:03:13,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:03:13,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 11:03:13,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-04-06 11:03:13,121 INFO L87 Difference]: Start difference. First operand 149 states and 157 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 7 states have call successors, (45), 7 states have call predecessors, (45), 7 states have return successors, (43), 6 states have call predecessors, (43), 6 states have call successors, (43) [2022-04-06 11:03:13,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:03:13,210 INFO L93 Difference]: Finished difference Result 183 states and 188 transitions. [2022-04-06 11:03:13,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 11:03:13,211 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 7 states have call successors, (45), 7 states have call predecessors, (45), 7 states have return successors, (43), 6 states have call predecessors, (43), 6 states have call successors, (43) Word has length 129 [2022-04-06 11:03:13,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:03:13,212 INFO L225 Difference]: With dead ends: 183 [2022-04-06 11:03:13,212 INFO L226 Difference]: Without dead ends: 168 [2022-04-06 11:03:13,212 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 250 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2022-04-06 11:03:13,212 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 10 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 11:03:13,212 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 177 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 11:03:13,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-04-06 11:03:13,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 166. [2022-04-06 11:03:13,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 104 states have (on average 1.0384615384615385) internal successors, (108), 105 states have internal predecessors, (108), 33 states have call successors, (33), 30 states have call predecessors, (33), 28 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-04-06 11:03:13,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 171 transitions. [2022-04-06 11:03:13,225 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 171 transitions. Word has length 129 [2022-04-06 11:03:13,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:03:13,225 INFO L478 AbstractCegarLoop]: Abstraction has 166 states and 171 transitions. [2022-04-06 11:03:13,226 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 7 states have call successors, (45), 7 states have call predecessors, (45), 7 states have return successors, (43), 6 states have call predecessors, (43), 6 states have call successors, (43) [2022-04-06 11:03:13,226 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 171 transitions. [2022-04-06 11:03:13,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-04-06 11:03:13,226 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:03:13,226 INFO L499 BasicCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:03:13,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-06 11:03:13,443 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-04-06 11:03:13,443 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:03:13,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:03:13,443 INFO L85 PathProgramCache]: Analyzing trace with hash -925808019, now seen corresponding path program 3 times [2022-04-06 11:03:13,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:03:13,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838839136] [2022-04-06 11:03:13,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:03:13,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:03:13,453 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:03:13,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1358372681] [2022-04-06 11:03:13,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 11:03:13,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:03:13,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:03:13,454 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) [2022-04-06 11:03:13,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-06 11:03:13,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-04-06 11:03:13,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 11:03:13,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 29 conjunts are in the unsatisfiable core [2022-04-06 11:03:13,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:03:14,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1016 backedges. 44 proven. 48 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2022-04-06 11:03:14,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:03:14,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:03:14,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838839136] [2022-04-06 11:03:14,447 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:03:14,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358372681] [2022-04-06 11:03:14,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358372681] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 11:03:14,447 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 11:03:14,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-04-06 11:03:14,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452275775] [2022-04-06 11:03:14,447 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-06 11:03:14,447 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 11:03:14,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:03:14,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 11:03:14,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-04-06 11:03:14,448 INFO L87 Difference]: Start difference. First operand 166 states and 171 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) [2022-04-06 11:03:14,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:03:14,661 INFO L93 Difference]: Finished difference Result 168 states and 172 transitions. [2022-04-06 11:03:14,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 11:03:14,671 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) Word has length 132 [2022-04-06 11:03:14,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:03:14,674 INFO L225 Difference]: With dead ends: 168 [2022-04-06 11:03:14,674 INFO L226 Difference]: Without dead ends: 157 [2022-04-06 11:03:14,674 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 164 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-04-06 11:03:14,674 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 6 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 11:03:14,674 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 234 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 11:03:14,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-04-06 11:03:14,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2022-04-06 11:03:14,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 99 states have (on average 1.0303030303030303) internal successors, (102), 100 states have internal predecessors, (102), 30 states have call successors, (30), 28 states have call predecessors, (30), 27 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-04-06 11:03:14,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 160 transitions. [2022-04-06 11:03:14,688 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 160 transitions. Word has length 132 [2022-04-06 11:03:14,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:03:14,688 INFO L478 AbstractCegarLoop]: Abstraction has 157 states and 160 transitions. [2022-04-06 11:03:14,688 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) [2022-04-06 11:03:14,688 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 160 transitions. [2022-04-06 11:03:14,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-04-06 11:03:14,690 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:03:14,690 INFO L499 BasicCegarLoop]: trace histogram [27, 26, 26, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:03:14,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-04-06 11:03:14,895 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:03:14,895 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:03:14,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:03:14,896 INFO L85 PathProgramCache]: Analyzing trace with hash 386125940, now seen corresponding path program 3 times [2022-04-06 11:03:14,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:03:14,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198169434] [2022-04-06 11:03:14,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:03:14,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:03:14,902 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:03:14,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1000311909] [2022-04-06 11:03:14,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 11:03:14,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:03:14,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:03:14,903 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) [2022-04-06 11:03:14,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-06 11:03:15,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-04-06 11:03:15,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 11:03:15,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 11:03:15,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:03:15,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1432 backedges. 143 proven. 16 refuted. 0 times theorem prover too weak. 1273 trivial. 0 not checked. [2022-04-06 11:03:15,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:03:16,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1432 backedges. 143 proven. 16 refuted. 0 times theorem prover too weak. 1273 trivial. 0 not checked. [2022-04-06 11:03:16,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:03:16,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198169434] [2022-04-06 11:03:16,035 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:03:16,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000311909] [2022-04-06 11:03:16,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000311909] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 11:03:16,036 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 11:03:16,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-04-06 11:03:16,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884548671] [2022-04-06 11:03:16,036 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 11:03:16,036 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 11:03:16,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:03:16,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 11:03:16,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-04-06 11:03:16,037 INFO L87 Difference]: Start difference. First operand 157 states and 160 transitions. Second operand has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 4 states have call predecessors, (17), 6 states have call successors, (17) [2022-04-06 11:03:18,199 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 11:03:20,324 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:03:21,976 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:03:23,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:03:23,148 INFO L93 Difference]: Finished difference Result 166 states and 170 transitions. [2022-04-06 11:03:23,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 11:03:23,149 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 4 states have call predecessors, (17), 6 states have call successors, (17) Word has length 155 [2022-04-06 11:03:23,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:03:23,150 INFO L225 Difference]: With dead ends: 166 [2022-04-06 11:03:23,150 INFO L226 Difference]: Without dead ends: 164 [2022-04-06 11:03:23,150 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 297 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-04-06 11:03:23,150 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 20 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 25 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2022-04-06 11:03:23,150 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 137 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 221 Invalid, 1 Unknown, 0 Unchecked, 7.1s Time] [2022-04-06 11:03:23,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-04-06 11:03:23,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 163. [2022-04-06 11:03:23,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 102 states have (on average 1.0294117647058822) internal successors, (105), 104 states have internal predecessors, (105), 32 states have call successors, (32), 29 states have call predecessors, (32), 28 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2022-04-06 11:03:23,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 167 transitions. [2022-04-06 11:03:23,178 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 167 transitions. Word has length 155 [2022-04-06 11:03:23,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:03:23,178 INFO L478 AbstractCegarLoop]: Abstraction has 163 states and 167 transitions. [2022-04-06 11:03:23,178 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 4 states have call predecessors, (17), 6 states have call successors, (17) [2022-04-06 11:03:23,178 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 167 transitions. [2022-04-06 11:03:23,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-04-06 11:03:23,179 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:03:23,179 INFO L499 BasicCegarLoop]: trace histogram [27, 26, 26, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:03:23,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-04-06 11:03:23,387 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-04-06 11:03:23,387 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:03:23,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:03:23,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1841306865, now seen corresponding path program 3 times [2022-04-06 11:03:23,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:03:23,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240200337] [2022-04-06 11:03:23,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:03:23,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:03:23,394 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:03:23,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2077738770] [2022-04-06 11:03:23,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 11:03:23,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:03:23,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:03:23,395 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) [2022-04-06 11:03:23,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-06 11:03:23,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2022-04-06 11:03:23,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-04-06 11:03:23,768 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 11:03:23,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 11:03:23,857 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 11:03:23,857 INFO L618 BasicCegarLoop]: Counterexample is feasible [2022-04-06 11:03:23,858 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 11:03:23,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-04-06 11:03:24,064 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:03:24,067 INFO L719 BasicCegarLoop]: Path program histogram: [4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2022-04-06 11:03:24,069 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-06 11:03:24,104 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 11:03:24 BasicIcfg [2022-04-06 11:03:24,105 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-06 11:03:24,105 INFO L158 Benchmark]: Toolchain (without parser) took 24166.19ms. Allocated memory was 186.6MB in the beginning and 311.4MB in the end (delta: 124.8MB). Free memory was 136.0MB in the beginning and 259.4MB in the end (delta: -123.4MB). Peak memory consumption was 786.4kB. Max. memory is 8.0GB. [2022-04-06 11:03:24,105 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 186.6MB. Free memory was 152.3MB in the beginning and 152.2MB in the end (delta: 75.0kB). There was no memory consumed. Max. memory is 8.0GB. [2022-04-06 11:03:24,105 INFO L158 Benchmark]: CACSL2BoogieTranslator took 159.99ms. Allocated memory is still 186.6MB. Free memory was 135.8MB in the beginning and 161.9MB in the end (delta: -26.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-04-06 11:03:24,105 INFO L158 Benchmark]: Boogie Preprocessor took 16.51ms. Allocated memory is still 186.6MB. Free memory was 161.9MB in the beginning and 160.6MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-06 11:03:24,105 INFO L158 Benchmark]: RCFGBuilder took 242.38ms. Allocated memory is still 186.6MB. Free memory was 160.4MB in the beginning and 149.6MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-04-06 11:03:24,106 INFO L158 Benchmark]: IcfgTransformer took 29.99ms. Allocated memory is still 186.6MB. Free memory was 149.6MB in the beginning and 148.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-04-06 11:03:24,106 INFO L158 Benchmark]: TraceAbstraction took 23706.47ms. Allocated memory was 186.6MB in the beginning and 311.4MB in the end (delta: 124.8MB). Free memory was 147.5MB in the beginning and 259.4MB in the end (delta: -111.9MB). Peak memory consumption was 13.9MB. Max. memory is 8.0GB. [2022-04-06 11:03:24,107 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 186.6MB. Free memory was 152.3MB in the beginning and 152.2MB in the end (delta: 75.0kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 159.99ms. Allocated memory is still 186.6MB. Free memory was 135.8MB in the beginning and 161.9MB in the end (delta: -26.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * Boogie Preprocessor took 16.51ms. Allocated memory is still 186.6MB. Free memory was 161.9MB in the beginning and 160.6MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 242.38ms. Allocated memory is still 186.6MB. Free memory was 160.4MB in the beginning and 149.6MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 29.99ms. Allocated memory is still 186.6MB. Free memory was 149.6MB in the beginning and 148.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * TraceAbstraction took 23706.47ms. Allocated memory was 186.6MB in the beginning and 311.4MB in the end (delta: 124.8MB). Free memory was 147.5MB in the beginning and 259.4MB in the end (delta: -111.9MB). Peak memory consumption was 13.9MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 17]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; VAL [\old(counter)=10, counter=0] [L24] short a; [L25] long long n, x, y, z; [L26] a = __VERIFIER_nondet_ushort() [L28] n = 0 [L29] x = 0 [L30] y = 1 [L31] z = 6 VAL [\old(counter)=0, a=5, counter=0, n=0, x=0, y=1, z=6] [L33] EXPR counter++ VAL [\old(counter)=0, a=5, counter=1, counter++=0, n=0, x=0, y=1, z=6] [L33] COND TRUE counter++<5 [L34] CALL __VERIFIER_assert(z == 6 * n + 6) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L34] RET __VERIFIER_assert(z == 6 * n + 6) VAL [\old(counter)=0, a=5, counter=1, n=0, x=0, y=1, z=6] [L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(counter)=0, a=5, counter=1, n=0, x=0, y=1, z=6] [L36] CALL __VERIFIER_assert(x == n * n * n) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L36] RET __VERIFIER_assert(x == n * n * n) VAL [\old(counter)=0, a=5, counter=1, n=0, x=0, y=1, z=6] [L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(counter)=0, a=5, counter=1, n=0, x=0, y=1, z=6] [L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(counter)=0, a=5, counter=1, n=0, x=0, y=1, z=6] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [\old(counter)=0, a=5, counter=1, n=1, x=1, y=7, z=12] [L33] EXPR counter++ VAL [\old(counter)=0, a=5, counter=2, counter++=1, n=1, x=1, y=7, z=12] [L33] COND TRUE counter++<5 [L34] CALL __VERIFIER_assert(z == 6 * n + 6) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L34] RET __VERIFIER_assert(z == 6 * n + 6) VAL [\old(counter)=0, a=5, counter=2, n=1, x=1, y=7, z=12] [L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(counter)=0, a=5, counter=2, n=1, x=1, y=7, z=12] [L36] CALL __VERIFIER_assert(x == n * n * n) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L36] RET __VERIFIER_assert(x == n * n * n) VAL [\old(counter)=0, a=5, counter=2, n=1, x=1, y=7, z=12] [L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(counter)=0, a=5, counter=2, n=1, x=1, y=7, z=12] [L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(counter)=0, a=5, counter=2, n=1, x=1, y=7, z=12] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [\old(counter)=0, a=5, counter=2, n=2, x=8, y=19, z=18] [L33] EXPR counter++ VAL [\old(counter)=0, a=5, counter=3, counter++=2, n=2, x=8, y=19, z=18] [L33] COND TRUE counter++<5 [L34] CALL __VERIFIER_assert(z == 6 * n + 6) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L34] RET __VERIFIER_assert(z == 6 * n + 6) VAL [\old(counter)=0, a=5, counter=3, n=2, x=8, y=19, z=18] [L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(counter)=0, a=5, counter=3, n=2, x=8, y=19, z=18] [L36] CALL __VERIFIER_assert(x == n * n * n) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L36] RET __VERIFIER_assert(x == n * n * n) VAL [\old(counter)=0, a=5, counter=3, n=2, x=8, y=19, z=18] [L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(counter)=0, a=5, counter=3, n=2, x=8, y=19, z=18] [L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(counter)=0, a=5, counter=3, n=2, x=8, y=19, z=18] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [\old(counter)=0, a=5, counter=3, n=3, x=27, y=37, z=24] [L33] EXPR counter++ VAL [\old(counter)=0, a=5, counter=4, counter++=3, n=3, x=27, y=37, z=24] [L33] COND TRUE counter++<5 [L34] CALL __VERIFIER_assert(z == 6 * n + 6) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L34] RET __VERIFIER_assert(z == 6 * n + 6) VAL [\old(counter)=0, a=5, counter=4, n=3, x=27, y=37, z=24] [L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(counter)=0, a=5, counter=4, n=3, x=27, y=37, z=24] [L36] CALL __VERIFIER_assert(x == n * n * n) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L36] RET __VERIFIER_assert(x == n * n * n) VAL [\old(counter)=0, a=5, counter=4, n=3, x=27, y=37, z=24] [L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(counter)=0, a=5, counter=4, n=3, x=27, y=37, z=24] [L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(counter)=0, a=5, counter=4, n=3, x=27, y=37, z=24] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [\old(counter)=0, a=5, counter=4, n=4, x=64, y=61, z=30] [L33] EXPR counter++ VAL [\old(counter)=0, a=5, counter=5, counter++=4, n=4, x=64, y=61, z=30] [L33] COND TRUE counter++<5 [L34] CALL __VERIFIER_assert(z == 6 * n + 6) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L34] RET __VERIFIER_assert(z == 6 * n + 6) VAL [\old(counter)=0, a=5, counter=5, n=4, x=64, y=61, z=30] [L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(counter)=0, a=5, counter=5, n=4, x=64, y=61, z=30] [L36] CALL __VERIFIER_assert(x == n * n * n) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L36] RET __VERIFIER_assert(x == n * n * n) VAL [\old(counter)=0, a=5, counter=5, n=4, x=64, y=61, z=30] [L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(counter)=0, a=5, counter=5, n=4, x=64, y=61, z=30] [L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(counter)=0, a=5, counter=5, n=4, x=64, y=61, z=30] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [\old(counter)=0, a=5, counter=5, n=5, x=125, y=91, z=36] [L33] EXPR counter++ VAL [\old(counter)=0, a=5, counter=6, counter++=5, n=5, x=125, y=91, z=36] [L33] COND FALSE !(counter++<5) [L48] CALL __VERIFIER_assert(z == 6*n + 6) VAL [\old(cond)=1, \old(counter)=0, counter=6] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=6] [L48] RET __VERIFIER_assert(z == 6*n + 6) VAL [\old(counter)=0, a=5, counter=6, n=5, x=125, y=91, z=36] [L49] CALL __VERIFIER_assert(6*a*x - x*z + 12*x == 0) VAL [\old(cond)=0, \old(counter)=0, counter=6] [L15] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=6] [L17] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=6] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 23.6s, OverallIterations: 19, TraceHistogramMax: 27, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 9.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 279 SdHoareTripleChecker+Valid, 9.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 223 mSDsluCounter, 2665 SdHoareTripleChecker+Invalid, 8.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1866 mSDsCounter, 301 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2480 IncrementalHoareTripleChecker+Invalid, 2782 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 301 mSolverCounterUnsat, 799 mSDtfsCounter, 2480 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1972 GetRequests, 1805 SyntacticMatches, 16 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=166occurred in iteration=16, InterpolantAutomatonStates: 133, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 18 MinimizatonAttempts, 26 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 2.6s SatisfiabilityAnalysisTime, 6.8s InterpolantComputationTime, 1325 NumberOfCodeBlocks, 1115 NumberOfCodeBlocksAsserted, 46 NumberOfCheckSat, 1770 ConstructedInterpolants, 0 QuantifiedInterpolants, 7221 SizeOfPredicates, 43 NumberOfNonLiveVariables, 2551 ConjunctsInSsa, 282 ConjunctsInUnsatCore, 26 InterpolantComputations, 6 PerfectInterpolantSequences, 8523/9498 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-04-06 11:03:24,132 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...