/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/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/lcm2_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 22:17:28,270 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 22:17:28,272 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 22:17:28,304 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 22:17:28,305 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 22:17:28,306 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 22:17:28,307 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 22:17:28,308 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 22:17:28,309 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 22:17:28,309 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 22:17:28,310 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 22:17:28,311 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 22:17:28,311 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 22:17:28,312 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 22:17:28,312 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 22:17:28,313 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 22:17:28,314 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 22:17:28,315 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 22:17:28,316 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 22:17:28,317 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 22:17:28,318 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 22:17:28,320 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 22:17:28,320 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 22:17:28,321 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 22:17:28,322 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 22:17:28,324 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-20 22:17:28,324 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-20 22:17:28,324 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-20 22:17:28,325 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-20 22:17:28,325 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-20 22:17:28,326 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-20 22:17:28,326 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-20 22:17:28,327 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-20 22:17:28,328 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-20 22:17:28,328 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-20 22:17:28,329 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-20 22:17:28,329 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-20 22:17:28,330 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-20 22:17:28,330 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-20 22:17:28,330 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 22:17:28,336 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 22:17:28,338 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 22:17:28,339 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-20 22:17:28,356 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 22:17:28,356 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 22:17:28,358 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 22:17:28,358 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 22:17:28,359 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 22:17:28,359 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 22:17:28,359 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 22:17:28,359 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 22:17:28,359 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 22:17:28,360 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 22:17:28,360 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 22:17:28,360 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 22:17:28,360 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 22:17:28,360 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 22:17:28,360 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 22:17:28,361 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 22:17:28,361 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 22:17:28,361 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 22:17:28,361 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 22:17:28,361 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 22:17:28,361 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 22:17:28,361 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-20 22:17:28,361 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 22:17:28,554 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 22:17:28,574 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 22:17:28,576 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 22:17:28,577 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 22:17:28,578 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 22:17:28,578 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/lcm2_valuebound5.c [2022-03-20 22:17:28,620 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ddd161785/dbbadbd593d24122ab12bc6b11d6e5e2/FLAGc7ae29874 [2022-03-20 22:17:28,974 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 22:17:28,974 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/lcm2_valuebound5.c [2022-03-20 22:17:28,979 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ddd161785/dbbadbd593d24122ab12bc6b11d6e5e2/FLAGc7ae29874 [2022-03-20 22:17:29,394 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ddd161785/dbbadbd593d24122ab12bc6b11d6e5e2 [2022-03-20 22:17:29,396 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 22:17:29,397 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 22:17:29,400 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 22:17:29,400 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 22:17:29,404 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 22:17:29,405 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 10:17:29" (1/1) ... [2022-03-20 22:17:29,406 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fbb4a0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:17:29, skipping insertion in model container [2022-03-20 22:17:29,406 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 10:17:29" (1/1) ... [2022-03-20 22:17:29,411 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 22:17:29,424 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 22:17:29,561 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/lcm2_valuebound5.c[537,550] [2022-03-20 22:17:29,573 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 22:17:29,579 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 22:17:29,589 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/lcm2_valuebound5.c[537,550] [2022-03-20 22:17:29,594 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 22:17:29,603 INFO L208 MainTranslator]: Completed translation [2022-03-20 22:17:29,603 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:17:29 WrapperNode [2022-03-20 22:17:29,603 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 22:17:29,604 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 22:17:29,604 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 22:17:29,604 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 22:17:29,615 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:17:29" (1/1) ... [2022-03-20 22:17:29,615 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:17:29" (1/1) ... [2022-03-20 22:17:29,620 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:17:29" (1/1) ... [2022-03-20 22:17:29,620 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:17:29" (1/1) ... [2022-03-20 22:17:29,624 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:17:29" (1/1) ... [2022-03-20 22:17:29,626 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:17:29" (1/1) ... [2022-03-20 22:17:29,627 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:17:29" (1/1) ... [2022-03-20 22:17:29,629 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 22:17:29,629 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 22:17:29,630 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 22:17:29,630 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 22:17:29,630 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:17:29" (1/1) ... [2022-03-20 22:17:29,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 22:17:29,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:17:29,665 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) [2022-03-20 22:17:29,677 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 [2022-03-20 22:17:29,702 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 22:17:29,702 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 22:17:29,703 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 22:17:29,703 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 22:17:29,703 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 22:17:29,704 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 22:17:29,704 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 22:17:29,704 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 22:17:29,704 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 22:17:29,705 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 22:17:29,705 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-20 22:17:29,705 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 22:17:29,705 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 22:17:29,706 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 22:17:29,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 22:17:29,708 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 22:17:29,708 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 22:17:29,708 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 22:17:29,708 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 22:17:29,708 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 22:17:29,766 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 22:17:29,767 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 22:17:29,918 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 22:17:29,923 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 22:17:29,923 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 22:17:29,932 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 10:17:29 BoogieIcfgContainer [2022-03-20 22:17:29,932 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 22:17:29,936 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 22:17:29,936 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 22:17:29,955 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 22:17:29,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 10:17:29" (1/3) ... [2022-03-20 22:17:29,956 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51814073 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 10:17:29, skipping insertion in model container [2022-03-20 22:17:29,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:17:29" (2/3) ... [2022-03-20 22:17:29,956 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51814073 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 10:17:29, skipping insertion in model container [2022-03-20 22:17:29,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 10:17:29" (3/3) ... [2022-03-20 22:17:29,957 INFO L111 eAbstractionObserver]: Analyzing ICFG lcm2_valuebound5.c [2022-03-20 22:17:29,961 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 22:17:29,961 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 22:17:30,014 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 22:17:30,020 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 [2022-03-20 22:17:30,021 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 22:17:30,031 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 22:17:30,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-20 22:17:30,038 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:17:30,038 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:17:30,039 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:17:30,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:17:30,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1830914611, now seen corresponding path program 1 times [2022-03-20 22:17:30,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:17:30,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [804129966] [2022-03-20 22:17:30,061 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:17:30,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1830914611, now seen corresponding path program 2 times [2022-03-20 22:17:30,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:17:30,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645772379] [2022-03-20 22:17:30,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:17:30,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:17:30,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 22:17:30,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 22:17:30,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 22:17:30,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 22:17:30,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 22:17:30,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 22:17:30,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 22:17:30,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 22:17:30,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 22:17:30,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-20 22:17:30,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 22:17:30,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-03-20 22:17:30,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 22:17:30,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-20 22:17:30,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 22:17:30,237 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-20 22:17:30,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:17:30,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645772379] [2022-03-20 22:17:30,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645772379] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:17:30,238 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:17:30,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 22:17:30,240 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:17:30,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [804129966] [2022-03-20 22:17:30,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [804129966] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:17:30,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:17:30,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 22:17:30,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495234120] [2022-03-20 22:17:30,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:17:30,245 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 22:17:30,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:17:30,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 22:17:30,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 22:17:30,278 INFO L87 Difference]: Start difference. First operand has 34 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 22:17:30,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:17:30,339 INFO L93 Difference]: Finished difference Result 61 states and 90 transitions. [2022-03-20 22:17:30,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 22:17:30,345 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2022-03-20 22:17:30,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:17:30,351 INFO L225 Difference]: With dead ends: 61 [2022-03-20 22:17:30,351 INFO L226 Difference]: Without dead ends: 29 [2022-03-20 22:17:30,354 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 22:17:30,357 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 18 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 22:17:30,358 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 36 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 22:17:30,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-03-20 22:17:30,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-03-20 22:17:30,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 22:17:30,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2022-03-20 22:17:30,393 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 43 [2022-03-20 22:17:30,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:17:30,393 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2022-03-20 22:17:30,393 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 22:17:30,394 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2022-03-20 22:17:30,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-20 22:17:30,395 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:17:30,395 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:17:30,396 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 22:17:30,396 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:17:30,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:17:30,397 INFO L85 PathProgramCache]: Analyzing trace with hash 206107499, now seen corresponding path program 1 times [2022-03-20 22:17:30,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:17:30,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [888266785] [2022-03-20 22:17:30,398 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:17:30,398 INFO L85 PathProgramCache]: Analyzing trace with hash 206107499, now seen corresponding path program 2 times [2022-03-20 22:17:30,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:17:30,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883860423] [2022-03-20 22:17:30,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:17:30,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:17:30,451 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:17:30,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1198769186] [2022-03-20 22:17:30,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 22:17:30,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:17:30,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:17:30,454 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) [2022-03-20 22:17:30,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 22:17:30,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-20 22:17:30,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:17:30,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 22:17:30,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:17:30,809 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-20 22:17:30,810 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 22:17:30,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:17:30,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883860423] [2022-03-20 22:17:30,810 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:17:30,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198769186] [2022-03-20 22:17:30,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198769186] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:17:30,811 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:17:30,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 22:17:30,811 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:17:30,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [888266785] [2022-03-20 22:17:30,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [888266785] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:17:30,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:17:30,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 22:17:30,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213284860] [2022-03-20 22:17:30,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:17:30,813 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 22:17:30,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:17:30,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 22:17:30,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 22:17:30,814 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-03-20 22:17:30,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:17:30,876 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2022-03-20 22:17:30,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 22:17:30,876 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 43 [2022-03-20 22:17:30,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:17:30,878 INFO L225 Difference]: With dead ends: 40 [2022-03-20 22:17:30,878 INFO L226 Difference]: Without dead ends: 37 [2022-03-20 22:17:30,878 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 22:17:30,880 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 7 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 22:17:30,880 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 115 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 22:17:30,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-20 22:17:30,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2022-03-20 22:17:30,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 22:17:30,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2022-03-20 22:17:30,890 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 43 [2022-03-20 22:17:30,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:17:30,891 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2022-03-20 22:17:30,891 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-03-20 22:17:30,891 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2022-03-20 22:17:30,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-20 22:17:30,892 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:17:30,893 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:17:30,918 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 22:17:31,107 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:17:31,108 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:17:31,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:17:31,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1555618915, now seen corresponding path program 1 times [2022-03-20 22:17:31,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:17:31,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1628984391] [2022-03-20 22:17:31,109 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:17:31,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1555618915, now seen corresponding path program 2 times [2022-03-20 22:17:31,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:17:31,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219818870] [2022-03-20 22:17:31,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:17:31,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:17:31,141 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:17:31,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [267732052] [2022-03-20 22:17:31,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 22:17:31,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:17:31,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:17:31,143 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) [2022-03-20 22:17:31,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process