/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/egcd-ll_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-19 10:22:17,934 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 10:22:17,935 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 10:22:17,966 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-19 10:22:17,966 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-19 10:22:17,967 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-19 10:22:17,972 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-19 10:22:17,977 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-19 10:22:17,978 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-19 10:22:17,982 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-19 10:22:17,982 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-19 10:22:17,983 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-19 10:22:17,984 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-19 10:22:17,985 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-19 10:22:17,986 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-19 10:22:17,987 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-19 10:22:17,987 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-19 10:22:17,987 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-19 10:22:17,991 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-19 10:22:17,995 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-19 10:22:17,997 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-19 10:22:17,998 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-19 10:22:17,998 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-19 10:22:17,999 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-19 10:22:18,000 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-19 10:22:18,005 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-19 10:22:18,005 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-19 10:22:18,006 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-19 10:22:18,006 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-19 10:22:18,006 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-19 10:22:18,007 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-19 10:22:18,008 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-19 10:22:18,009 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-19 10:22:18,009 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-19 10:22:18,010 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-19 10:22:18,010 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-19 10:22:18,010 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-19 10:22:18,011 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-19 10:22:18,011 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-19 10:22:18,011 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 10:22:18,011 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 10:22:18,013 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 10:22:18,013 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-19 10:22:18,022 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 10:22:18,022 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 10:22:18,024 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 10:22:18,024 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 10:22:18,025 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 10:22:18,025 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 10:22:18,025 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 10:22:18,025 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 10:22:18,025 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 10:22:18,026 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 10:22:18,026 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 10:22:18,026 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 10:22:18,026 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 10:22:18,026 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-19 10:22:18,026 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 10:22:18,026 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 10:22:18,026 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 10:22:18,026 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-19 10:22:18,026 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-19 10:22:18,026 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-19 10:22:18,027 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 10:22:18,027 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-19 10:22:18,027 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 10:22:18,194 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 10:22:18,217 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 10:22:18,219 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 10:22:18,219 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 10:22:18,220 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 10:22:18,221 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound5.c [2022-03-19 10:22:18,271 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f62e3bb2/76c805975d8f4085851ac9364fbca4d1/FLAGe4452cec6 [2022-03-19 10:22:18,576 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 10:22:18,576 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound5.c [2022-03-19 10:22:18,581 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f62e3bb2/76c805975d8f4085851ac9364fbca4d1/FLAGe4452cec6 [2022-03-19 10:22:19,019 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f62e3bb2/76c805975d8f4085851ac9364fbca4d1 [2022-03-19 10:22:19,022 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 10:22:19,023 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 10:22:19,033 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 10:22:19,033 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 10:22:19,037 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 10:22:19,042 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 10:22:19" (1/1) ... [2022-03-19 10:22:19,042 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b21549d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:22:19, skipping insertion in model container [2022-03-19 10:22:19,043 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 10:22:19" (1/1) ... [2022-03-19 10:22:19,047 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 10:22:19,063 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 10:22:19,236 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/egcd-ll_valuebound5.c[489,502] [2022-03-19 10:22:19,280 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 10:22:19,291 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 10:22:19,300 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/egcd-ll_valuebound5.c[489,502] [2022-03-19 10:22:19,319 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 10:22:19,328 INFO L208 MainTranslator]: Completed translation [2022-03-19 10:22:19,329 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:22:19 WrapperNode [2022-03-19 10:22:19,329 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 10:22:19,329 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 10:22:19,330 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 10:22:19,330 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 10:22:19,339 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:22:19" (1/1) ... [2022-03-19 10:22:19,339 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:22:19" (1/1) ... [2022-03-19 10:22:19,346 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:22:19" (1/1) ... [2022-03-19 10:22:19,346 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:22:19" (1/1) ... [2022-03-19 10:22:19,356 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:22:19" (1/1) ... [2022-03-19 10:22:19,361 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:22:19" (1/1) ... [2022-03-19 10:22:19,368 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:22:19" (1/1) ... [2022-03-19 10:22:19,370 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 10:22:19,371 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 10:22:19,371 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 10:22:19,371 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 10:22:19,372 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:22:19" (1/1) ... [2022-03-19 10:22:19,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 10:22:19,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:22:19,405 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) [2022-03-19 10:22:19,423 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 [2022-03-19 10:22:19,442 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 10:22:19,442 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 10:22:19,442 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 10:22:19,442 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-19 10:22:19,443 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 10:22:19,443 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 10:22:19,443 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 10:22:19,443 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 10:22:19,443 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 10:22:19,443 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 10:22:19,443 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-19 10:22:19,444 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-19 10:22:19,444 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 10:22:19,444 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 10:22:19,445 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 10:22:19,445 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 10:22:19,445 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 10:22:19,445 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 10:22:19,445 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 10:22:19,445 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 10:22:19,496 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 10:22:19,497 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 10:22:19,596 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 10:22:19,601 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 10:22:19,601 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-19 10:22:19,602 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 10:22:19 BoogieIcfgContainer [2022-03-19 10:22:19,602 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 10:22:19,604 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 10:22:19,604 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 10:22:19,606 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 10:22:19,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 10:22:19" (1/3) ... [2022-03-19 10:22:19,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a73888b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 10:22:19, skipping insertion in model container [2022-03-19 10:22:19,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:22:19" (2/3) ... [2022-03-19 10:22:19,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a73888b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 10:22:19, skipping insertion in model container [2022-03-19 10:22:19,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 10:22:19" (3/3) ... [2022-03-19 10:22:19,608 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_valuebound5.c [2022-03-19 10:22:19,612 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-19 10:22:19,612 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 10:22:19,642 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 10:22:19,647 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 [2022-03-19 10:22:19,647 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 10:22:19,657 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-19 10:22:19,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-19 10:22:19,664 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:22:19,664 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:22:19,665 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:22:19,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:22:19,669 INFO L85 PathProgramCache]: Analyzing trace with hash 870870740, now seen corresponding path program 1 times [2022-03-19 10:22:19,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:22:19,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [253869581] [2022-03-19 10:22:19,682 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:22:19,683 INFO L85 PathProgramCache]: Analyzing trace with hash 870870740, now seen corresponding path program 2 times [2022-03-19 10:22:19,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:22:19,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771768513] [2022-03-19 10:22:19,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:22:19,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:22:19,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 10:22:19,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 10:22:19,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 10:22:19,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 10:22:19,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 10:22:19,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 10:22:19,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 10:22:19,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 10:22:19,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 10:22:19,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-19 10:22:19,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 10:22:19,932 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 10:22:19,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:22:19,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771768513] [2022-03-19 10:22:19,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771768513] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:22:19,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:22:19,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 10:22:19,938 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:22:19,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [253869581] [2022-03-19 10:22:19,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [253869581] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:22:19,941 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:22:19,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 10:22:19,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546987827] [2022-03-19 10:22:19,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:22:19,948 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-19 10:22:19,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:22:19,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-19 10:22:19,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 10:22:19,981 INFO L87 Difference]: Start difference. First operand has 37 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 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 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 10:22:20,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:22:20,109 INFO L93 Difference]: Finished difference Result 67 states and 105 transitions. [2022-03-19 10:22:20,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-19 10:22:20,112 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-03-19 10:22:20,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:22:20,118 INFO L225 Difference]: With dead ends: 67 [2022-03-19 10:22:20,119 INFO L226 Difference]: Without dead ends: 32 [2022-03-19 10:22:20,121 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 10:22:20,125 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 18 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:22:20,125 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 39 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:22:20,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-19 10:22:20,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-19 10:22:20,154 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) [2022-03-19 10:22:20,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2022-03-19 10:22:20,156 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 33 [2022-03-19 10:22:20,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:22:20,157 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2022-03-19 10:22:20,157 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 10:22:20,157 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2022-03-19 10:22:20,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-19 10:22:20,159 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:22:20,159 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:22:20,159 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 10:22:20,159 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:22:20,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:22:20,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1006914976, now seen corresponding path program 1 times [2022-03-19 10:22:20,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:22:20,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2007796874] [2022-03-19 10:22:20,161 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:22:20,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1006914976, now seen corresponding path program 2 times [2022-03-19 10:22:20,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:22:20,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014949318] [2022-03-19 10:22:20,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:22:20,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:22:20,183 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:22:20,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [458821079] [2022-03-19 10:22:20,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:22:20,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:22:20,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:22:20,199 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) [2022-03-19 10:22:20,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 10:22:20,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-19 10:22:20,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:22:20,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 10:22:20,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:22:20,399 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 10:22:20,399 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 10:22:20,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:22:20,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014949318] [2022-03-19 10:22:20,399 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:22:20,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458821079] [2022-03-19 10:22:20,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458821079] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:22:20,400 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:22:20,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 10:22:20,401 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:22:20,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2007796874] [2022-03-19 10:22:20,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2007796874] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:22:20,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:22:20,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 10:22:20,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314782022] [2022-03-19 10:22:20,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:22:20,402 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 10:22:20,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:22:20,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 10:22:20,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 10:22:20,403 INFO L87 Difference]: Start difference. First operand 32 states and 42 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-19 10:22:20,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:22:20,443 INFO L93 Difference]: Finished difference Result 48 states and 65 transitions. [2022-03-19 10:22:20,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 10:22:20,443 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 33 [2022-03-19 10:22:20,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:22:20,444 INFO L225 Difference]: With dead ends: 48 [2022-03-19 10:22:20,444 INFO L226 Difference]: Without dead ends: 46 [2022-03-19 10:22:20,445 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 10:22:20,445 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 7 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 10:22:20,446 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 155 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 10:22:20,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-03-19 10:22:20,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2022-03-19 10:22:20,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 23 states have internal predecessors, (26), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-19 10:22:20,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2022-03-19 10:22:20,457 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 33 [2022-03-19 10:22:20,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:22:20,458 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2022-03-19 10:22:20,458 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-19 10:22:20,458 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2022-03-19 10:22:20,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-19 10:22:20,459 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:22:20,459 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:22:20,476 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-19 10:22:20,663 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 [2022-03-19 10:22:20,664 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:22:20,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:22:20,666 INFO L85 PathProgramCache]: Analyzing trace with hash -124657161, now seen corresponding path program 1 times [2022-03-19 10:22:20,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:22:20,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [177909636] [2022-03-19 10:22:20,667 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:22:20,667 INFO L85 PathProgramCache]: Analyzing trace with hash -124657161, now seen corresponding path program 2 times [2022-03-19 10:22:20,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:22:20,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474118818] [2022-03-19 10:22:20,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:22:20,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:22:20,699 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:22:20,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [918116628] [2022-03-19 10:22:20,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:22:20,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:22:20,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:22:20,703 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) [2022-03-19 10:22:20,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 10:22:20,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:22:20,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:22:20,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 10:22:20,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:22:20,839 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 10:22:20,839 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 10:22:20,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:22:20,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474118818] [2022-03-19 10:22:20,840 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:22:20,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918116628] [2022-03-19 10:22:20,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918116628] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:22:20,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:22:20,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 10:22:20,840 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:22:20,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [177909636] [2022-03-19 10:22:20,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [177909636] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:22:20,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:22:20,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 10:22:20,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359186434] [2022-03-19 10:22:20,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:22:20,841 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 10:22:20,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:22:20,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 10:22:20,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 10:22:20,842 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-19 10:22:20,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:22:20,878 INFO L93 Difference]: Finished difference Result 52 states and 68 transitions. [2022-03-19 10:22:20,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 10:22:20,879 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2022-03-19 10:22:20,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:22:20,882 INFO L225 Difference]: With dead ends: 52 [2022-03-19 10:22:20,882 INFO L226 Difference]: Without dead ends: 50 [2022-03-19 10:22:20,883 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 10:22:20,884 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 8 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 10:22:20,884 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 156 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 10:22:20,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-19 10:22:20,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-03-19 10:22:20,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 26 states have internal predecessors, (29), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-19 10:22:20,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 65 transitions. [2022-03-19 10:22:20,892 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 65 transitions. Word has length 38 [2022-03-19 10:22:20,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:22:20,893 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 65 transitions. [2022-03-19 10:22:20,893 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-19 10:22:20,893 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 65 transitions. [2022-03-19 10:22:20,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-19 10:22:20,894 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:22:20,894 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:22:20,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-19 10:22:21,123 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-19 10:22:21,124 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:22:21,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:22:21,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1732898944, now seen corresponding path program 1 times [2022-03-19 10:22:21,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:22:21,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [513521526] [2022-03-19 10:22:21,125 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:22:21,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1732898944, now seen corresponding path program 2 times [2022-03-19 10:22:21,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:22:21,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935407983] [2022-03-19 10:22:21,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:22:21,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:22:21,136 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:22:21,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1343815183] [2022-03-19 10:22:21,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:22:21,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:22:21,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:22:21,138 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) [2022-03-19 10:22:21,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 10:22:21,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:22:21,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:22:21,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 10:22:21,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:22:21,277 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-19 10:22:21,277 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 10:22:21,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:22:21,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935407983] [2022-03-19 10:22:21,278 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:22:21,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343815183] [2022-03-19 10:22:21,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343815183] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:22:21,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:22:21,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 10:22:21,278 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:22:21,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [513521526] [2022-03-19 10:22:21,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [513521526] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:22:21,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:22:21,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 10:22:21,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897749390] [2022-03-19 10:22:21,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:22:21,279 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 10:22:21,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:22:21,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 10:22:21,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 10:22:21,280 INFO L87 Difference]: Start difference. First operand 49 states and 65 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 10:22:21,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:22:21,332 INFO L93 Difference]: Finished difference Result 74 states and 105 transitions. [2022-03-19 10:22:21,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 10:22:21,332 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2022-03-19 10:22:21,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:22:21,334 INFO L225 Difference]: With dead ends: 74 [2022-03-19 10:22:21,334 INFO L226 Difference]: Without dead ends: 70 [2022-03-19 10:22:21,335 INFO L911 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 [2022-03-19 10:22:21,335 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 8 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 10:22:21,336 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 155 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 10:22:21,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-03-19 10:22:21,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-03-19 10:22:21,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 37 states have internal predecessors, (42), 30 states have call successors, (30), 7 states have call predecessors, (30), 6 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2022-03-19 10:22:21,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 98 transitions. [2022-03-19 10:22:21,346 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 98 transitions. Word has length 43 [2022-03-19 10:22:21,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:22:21,346 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 98 transitions. [2022-03-19 10:22:21,346 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 10:22:21,346 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 98 transitions. [2022-03-19 10:22:21,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-19 10:22:21,347 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:22:21,347 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:22:21,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-19 10:22:21,564 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:22:21,564 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:22:21,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:22:21,565 INFO L85 PathProgramCache]: Analyzing trace with hash -301191846, now seen corresponding path program 1 times [2022-03-19 10:22:21,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:22:21,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [845118306] [2022-03-19 10:22:21,565 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:22:21,565 INFO L85 PathProgramCache]: Analyzing trace with hash -301191846, now seen corresponding path program 2 times [2022-03-19 10:22:21,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:22:21,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14802917] [2022-03-19 10:22:21,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:22:21,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:22:21,585 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:22:21,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [187122950] [2022-03-19 10:22:21,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:22:21,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:22:21,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:22:21,586 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) [2022-03-19 10:22:21,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-19 10:22:21,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:22:21,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:22:21,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-19 10:22:21,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:22:21,711 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-19 10:22:21,711 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 10:22:21,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:22:21,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14802917] [2022-03-19 10:22:21,716 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:22:21,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187122950] [2022-03-19 10:22:21,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187122950] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:22:21,716 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:22:21,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 10:22:21,716 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:22:21,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [845118306] [2022-03-19 10:22:21,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [845118306] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:22:21,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:22:21,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 10:22:21,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910794829] [2022-03-19 10:22:21,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:22:21,718 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 10:22:21,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:22:21,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 10:22:21,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 10:22:21,719 INFO L87 Difference]: Start difference. First operand 70 states and 98 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2022-03-19 10:22:21,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:22:21,756 INFO L93 Difference]: Finished difference Result 76 states and 103 transitions. [2022-03-19 10:22:21,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 10:22:21,756 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) Word has length 49 [2022-03-19 10:22:21,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:22:21,759 INFO L225 Difference]: With dead ends: 76 [2022-03-19 10:22:21,759 INFO L226 Difference]: Without dead ends: 74 [2022-03-19 10:22:21,759 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 10:22:21,761 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 5 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 10:22:21,762 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 147 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 10:22:21,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-03-19 10:22:21,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-03-19 10:22:21,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 36 states have (on average 1.25) internal successors, (45), 40 states have internal predecessors, (45), 30 states have call successors, (30), 8 states have call predecessors, (30), 7 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2022-03-19 10:22:21,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 101 transitions. [2022-03-19 10:22:21,778 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 101 transitions. Word has length 49 [2022-03-19 10:22:21,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:22:21,778 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 101 transitions. [2022-03-19 10:22:21,778 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2022-03-19 10:22:21,778 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 101 transitions. [2022-03-19 10:22:21,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-19 10:22:21,779 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:22:21,779 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 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] [2022-03-19 10:22:21,803 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-19 10:22:22,001 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:22:22,001 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:22:22,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:22:22,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1164909737, now seen corresponding path program 1 times [2022-03-19 10:22:22,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:22:22,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1500731793] [2022-03-19 10:22:22,002 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:22:22,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1164909737, now seen corresponding path program 2 times [2022-03-19 10:22:22,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:22:22,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205973336] [2022-03-19 10:22:22,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:22:22,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:22:22,011 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:22:22,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1955125431] [2022-03-19 10:22:22,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:22:22,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:22:22,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:22:22,015 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) [2022-03-19 10:22:22,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-19 10:22:22,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:22:22,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:22:22,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-19 10:22:22,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:22:22,189 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-03-19 10:22:22,189 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 10:22:22,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:22:22,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205973336] [2022-03-19 10:22:22,189 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:22:22,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955125431] [2022-03-19 10:22:22,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955125431] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:22:22,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:22:22,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 10:22:22,190 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:22:22,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1500731793] [2022-03-19 10:22:22,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1500731793] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:22:22,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:22:22,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 10:22:22,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185414083] [2022-03-19 10:22:22,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:22:22,190 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 10:22:22,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:22:22,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 10:22:22,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 10:22:22,191 INFO L87 Difference]: Start difference. First operand 74 states and 101 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-19 10:22:22,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:22:22,227 INFO L93 Difference]: Finished difference Result 84 states and 109 transitions. [2022-03-19 10:22:22,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 10:22:22,228 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2022-03-19 10:22:22,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:22:22,228 INFO L225 Difference]: With dead ends: 84 [2022-03-19 10:22:22,228 INFO L226 Difference]: Without dead ends: 81 [2022-03-19 10:22:22,229 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 10:22:22,229 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 10:22:22,229 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 158 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 10:22:22,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-03-19 10:22:22,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2022-03-19 10:22:22,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 45 states have internal predecessors, (51), 27 states have call successors, (27), 10 states have call predecessors, (27), 9 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-19 10:22:22,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 102 transitions. [2022-03-19 10:22:22,237 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 102 transitions. Word has length 51 [2022-03-19 10:22:22,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:22:22,238 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 102 transitions. [2022-03-19 10:22:22,238 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-19 10:22:22,238 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 102 transitions. [2022-03-19 10:22:22,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-19 10:22:22,239 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:22:22,239 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 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, 1, 1] [2022-03-19 10:22:22,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-19 10:22:22,455 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:22:22,456 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:22:22,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:22:22,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1924168317, now seen corresponding path program 1 times [2022-03-19 10:22:22,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:22:22,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1596419941] [2022-03-19 10:22:22,457 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:22:22,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1924168317, now seen corresponding path program 2 times [2022-03-19 10:22:22,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:22:22,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542516158] [2022-03-19 10:22:22,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:22:22,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:22:22,466 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:22:22,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1615151192] [2022-03-19 10:22:22,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:22:22,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:22:22,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:22:22,468 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) [2022-03-19 10:22:22,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-19 10:22:22,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:22:22,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:22:22,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-19 10:22:22,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:22:22,614 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-03-19 10:22:22,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:22:22,753 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-03-19 10:22:22,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:22:22,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542516158] [2022-03-19 10:22:22,753 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:22:22,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615151192] [2022-03-19 10:22:22,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615151192] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:22:22,753 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:22:22,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-19 10:22:22,754 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:22:22,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1596419941] [2022-03-19 10:22:22,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1596419941] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:22:22,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:22:22,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 10:22:22,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118470004] [2022-03-19 10:22:22,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:22:22,754 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 10:22:22,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:22:22,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 10:22:22,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-19 10:22:22,755 INFO L87 Difference]: Start difference. First operand 79 states and 102 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-19 10:22:22,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:22:22,854 INFO L93 Difference]: Finished difference Result 88 states and 112 transitions. [2022-03-19 10:22:22,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 10:22:22,854 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 54 [2022-03-19 10:22:22,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:22:22,855 INFO L225 Difference]: With dead ends: 88 [2022-03-19 10:22:22,855 INFO L226 Difference]: Without dead ends: 84 [2022-03-19 10:22:22,856 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-19 10:22:22,856 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 14 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:22:22,856 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 158 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:22:22,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-03-19 10:22:22,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-03-19 10:22:22,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 49 states have internal predecessors, (53), 27 states have call successors, (27), 11 states have call predecessors, (27), 10 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-19 10:22:22,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 105 transitions. [2022-03-19 10:22:22,865 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 105 transitions. Word has length 54 [2022-03-19 10:22:22,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:22:22,865 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 105 transitions. [2022-03-19 10:22:22,865 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-19 10:22:22,865 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 105 transitions. [2022-03-19 10:22:22,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-19 10:22:22,866 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:22:22,866 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:22:22,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-19 10:22:23,082 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:22:23,083 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:22:23,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:22:23,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1698149216, now seen corresponding path program 3 times [2022-03-19 10:22:23,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:22:23,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [586548449] [2022-03-19 10:22:23,084 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:22:23,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1698149216, now seen corresponding path program 4 times [2022-03-19 10:22:23,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:22:23,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448345571] [2022-03-19 10:22:23,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:22:23,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:22:23,095 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:22:23,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [317413662] [2022-03-19 10:22:23,095 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:22:23,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:22:23,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:22:23,104 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) [2022-03-19 10:22:23,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-19 10:22:23,137 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:22:23,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:22:23,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-19 10:22:23,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:22:23,368 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-03-19 10:22:23,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:22:23,500 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-19 10:22:23,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:22:23,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448345571] [2022-03-19 10:22:23,500 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:22:23,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317413662] [2022-03-19 10:22:23,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317413662] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:22:23,501 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:22:23,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 11 [2022-03-19 10:22:23,501 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:22:23,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [586548449] [2022-03-19 10:22:23,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [586548449] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:22:23,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:22:23,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 10:22:23,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831845491] [2022-03-19 10:22:23,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:22:23,502 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 10:22:23,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:22:23,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 10:22:23,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-03-19 10:22:23,503 INFO L87 Difference]: Start difference. First operand 84 states and 105 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-19 10:22:23,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:22:23,643 INFO L93 Difference]: Finished difference Result 118 states and 147 transitions. [2022-03-19 10:22:23,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 10:22:23,643 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) Word has length 56 [2022-03-19 10:22:23,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:22:23,644 INFO L225 Difference]: With dead ends: 118 [2022-03-19 10:22:23,644 INFO L226 Difference]: Without dead ends: 116 [2022-03-19 10:22:23,644 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-03-19 10:22:23,645 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 21 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:22:23,645 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 224 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:22:23,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-03-19 10:22:23,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 112. [2022-03-19 10:22:23,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 64 states have (on average 1.15625) internal successors, (74), 67 states have internal predecessors, (74), 33 states have call successors, (33), 15 states have call predecessors, (33), 14 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2022-03-19 10:22:23,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 138 transitions. [2022-03-19 10:22:23,655 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 138 transitions. Word has length 56 [2022-03-19 10:22:23,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:22:23,656 INFO L478 AbstractCegarLoop]: Abstraction has 112 states and 138 transitions. [2022-03-19 10:22:23,656 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-19 10:22:23,656 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 138 transitions. [2022-03-19 10:22:23,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-19 10:22:23,656 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:22:23,657 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:22:23,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-19 10:22:23,873 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:22:23,873 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:22:23,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:22:23,874 INFO L85 PathProgramCache]: Analyzing trace with hash 888099957, now seen corresponding path program 1 times [2022-03-19 10:22:23,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:22:23,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1845750532] [2022-03-19 10:22:23,874 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:22:23,874 INFO L85 PathProgramCache]: Analyzing trace with hash 888099957, now seen corresponding path program 2 times [2022-03-19 10:22:23,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:22:23,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103447439] [2022-03-19 10:22:23,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:22:23,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:22:23,882 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:22:23,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1376697987] [2022-03-19 10:22:23,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:22:23,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:22:23,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:22:23,884 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) [2022-03-19 10:22:23,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-19 10:22:23,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:22:23,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:22:23,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-19 10:22:23,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:22:24,140 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-19 10:22:24,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:22:24,245 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-19 10:22:24,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:22:24,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103447439] [2022-03-19 10:22:24,245 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:22:24,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376697987] [2022-03-19 10:22:24,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376697987] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:22:24,245 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:22:24,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-03-19 10:22:24,246 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:22:24,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1845750532] [2022-03-19 10:22:24,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1845750532] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:22:24,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:22:24,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 10:22:24,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092356898] [2022-03-19 10:22:24,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:22:24,246 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 10:22:24,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:22:24,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 10:22:24,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-19 10:22:24,247 INFO L87 Difference]: Start difference. First operand 112 states and 138 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-03-19 10:22:24,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:22:24,317 INFO L93 Difference]: Finished difference Result 137 states and 178 transitions. [2022-03-19 10:22:24,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 10:22:24,318 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 61 [2022-03-19 10:22:24,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:22:24,319 INFO L225 Difference]: With dead ends: 137 [2022-03-19 10:22:24,319 INFO L226 Difference]: Without dead ends: 131 [2022-03-19 10:22:24,319 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-19 10:22:24,320 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 8 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:22:24,320 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 198 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:22:24,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-03-19 10:22:24,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2022-03-19 10:22:24,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 73 states have (on average 1.178082191780822) internal successors, (86), 77 states have internal predecessors, (86), 42 states have call successors, (42), 16 states have call predecessors, (42), 15 states have return successors, (39), 37 states have call predecessors, (39), 39 states have call successors, (39) [2022-03-19 10:22:24,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 167 transitions. [2022-03-19 10:22:24,331 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 167 transitions. Word has length 61 [2022-03-19 10:22:24,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:22:24,331 INFO L478 AbstractCegarLoop]: Abstraction has 131 states and 167 transitions. [2022-03-19 10:22:24,332 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-03-19 10:22:24,332 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 167 transitions. [2022-03-19 10:22:24,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-19 10:22:24,332 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:22:24,332 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:22:24,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-19 10:22:24,549 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,SelfDestructingSolverStorable8 [2022-03-19 10:22:24,549 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:22:24,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:22:24,550 INFO L85 PathProgramCache]: Analyzing trace with hash 2064127436, now seen corresponding path program 1 times [2022-03-19 10:22:24,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:22:24,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1377538961] [2022-03-19 10:22:24,550 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:22:24,550 INFO L85 PathProgramCache]: Analyzing trace with hash 2064127436, now seen corresponding path program 2 times [2022-03-19 10:22:24,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:22:24,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527047058] [2022-03-19 10:22:24,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:22:24,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:22:24,559 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:22:24,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1806308820] [2022-03-19 10:22:24,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:22:24,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:22:24,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:22:24,560 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) [2022-03-19 10:22:24,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-19 10:22:24,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:22:24,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:22:24,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-19 10:22:24,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:22:24,808 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-19 10:22:24,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:22:24,933 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-03-19 10:22:24,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:22:24,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527047058] [2022-03-19 10:22:24,934 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:22:24,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806308820] [2022-03-19 10:22:24,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806308820] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-19 10:22:24,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 10:22:24,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2022-03-19 10:22:24,934 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:22:24,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1377538961] [2022-03-19 10:22:24,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1377538961] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:22:24,935 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:22:24,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 10:22:24,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361284669] [2022-03-19 10:22:24,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:22:24,935 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 10:22:24,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:22:24,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 10:22:24,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-19 10:22:24,936 INFO L87 Difference]: Start difference. First operand 131 states and 167 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-19 10:22:24,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:22:24,987 INFO L93 Difference]: Finished difference Result 137 states and 172 transitions. [2022-03-19 10:22:24,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 10:22:24,987 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 69 [2022-03-19 10:22:24,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:22:24,988 INFO L225 Difference]: With dead ends: 137 [2022-03-19 10:22:24,988 INFO L226 Difference]: Without dead ends: 132 [2022-03-19 10:22:24,988 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 128 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-19 10:22:24,989 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 6 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 10:22:24,989 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 128 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 10:22:24,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-03-19 10:22:24,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2022-03-19 10:22:24,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 76 states have (on average 1.1578947368421053) internal successors, (88), 79 states have internal predecessors, (88), 39 states have call successors, (39), 17 states have call predecessors, (39), 16 states have return successors, (37), 35 states have call predecessors, (37), 37 states have call successors, (37) [2022-03-19 10:22:25,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 164 transitions. [2022-03-19 10:22:25,000 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 164 transitions. Word has length 69 [2022-03-19 10:22:25,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:22:25,000 INFO L478 AbstractCegarLoop]: Abstraction has 132 states and 164 transitions. [2022-03-19 10:22:25,000 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-19 10:22:25,000 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 164 transitions. [2022-03-19 10:22:25,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-19 10:22:25,001 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:22:25,001 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:22:25,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-19 10:22:25,217 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-19 10:22:25,217 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:22:25,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:22:25,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1196252297, now seen corresponding path program 5 times [2022-03-19 10:22:25,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:22:25,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2007455820] [2022-03-19 10:22:25,218 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:22:25,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1196252297, now seen corresponding path program 6 times [2022-03-19 10:22:25,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:22:25,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557680782] [2022-03-19 10:22:25,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:22:25,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:22:25,230 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:22:25,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [326027062] [2022-03-19 10:22:25,230 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 10:22:25,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:22:25,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:22:25,233 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) [2022-03-19 10:22:25,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-19 10:22:25,297 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 10:22:25,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:22:25,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-19 10:22:25,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:22:25,974 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 45 proven. 23 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-03-19 10:22:25,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:22:26,565 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:22:33,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:22:33,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557680782] [2022-03-19 10:22:33,100 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:22:33,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326027062] [2022-03-19 10:22:33,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326027062] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 10:22:33,100 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 10:22:33,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-03-19 10:22:33,100 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:22:33,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2007455820] [2022-03-19 10:22:33,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2007455820] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:22:33,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:22:33,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 10:22:33,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749336960] [2022-03-19 10:22:33,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:22:33,101 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 10:22:33,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:22:33,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 10:22:33,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=381, Unknown=3, NotChecked=0, Total=462 [2022-03-19 10:22:33,101 INFO L87 Difference]: Start difference. First operand 132 states and 164 transitions. Second operand has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) [2022-03-19 10:22:33,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:22:33,662 INFO L93 Difference]: Finished difference Result 162 states and 204 transitions. [2022-03-19 10:22:33,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 10:22:33,663 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) Word has length 74 [2022-03-19 10:22:33,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:22:33,664 INFO L225 Difference]: With dead ends: 162 [2022-03-19 10:22:33,664 INFO L226 Difference]: Without dead ends: 160 [2022-03-19 10:22:33,665 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=96, Invalid=501, Unknown=3, NotChecked=0, Total=600 [2022-03-19 10:22:33,665 INFO L912 BasicCegarLoop]: 37 mSDtfsCounter, 31 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 10:22:33,665 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 292 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 422 Invalid, 0 Unknown, 67 Unchecked, 0.5s Time] [2022-03-19 10:22:33,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-03-19 10:22:33,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 142. [2022-03-19 10:22:33,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 82 states have (on average 1.1585365853658536) internal successors, (95), 85 states have internal predecessors, (95), 42 states have call successors, (42), 18 states have call predecessors, (42), 17 states have return successors, (40), 38 states have call predecessors, (40), 40 states have call successors, (40) [2022-03-19 10:22:33,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 177 transitions. [2022-03-19 10:22:33,695 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 177 transitions. Word has length 74 [2022-03-19 10:22:33,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:22:33,695 INFO L478 AbstractCegarLoop]: Abstraction has 142 states and 177 transitions. [2022-03-19 10:22:33,695 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) [2022-03-19 10:22:33,695 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 177 transitions. [2022-03-19 10:22:33,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-19 10:22:33,696 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:22:33,696 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:22:33,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-19 10:22:33,912 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,SelfDestructingSolverStorable10 [2022-03-19 10:22:33,912 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:22:33,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:22:33,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1712511605, now seen corresponding path program 3 times [2022-03-19 10:22:33,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:22:33,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1153210537] [2022-03-19 10:22:33,913 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:22:33,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1712511605, now seen corresponding path program 4 times [2022-03-19 10:22:33,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:22:33,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368762721] [2022-03-19 10:22:33,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:22:33,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:22:33,924 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:22:33,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1248689333] [2022-03-19 10:22:33,924 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:22:33,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:22:33,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:22:33,925 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) [2022-03-19 10:22:33,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-19 10:22:33,974 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:22:33,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:22:33,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-19 10:22:33,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:22:34,426 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 34 proven. 19 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-03-19 10:22:34,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:22:34,831 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 34 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-03-19 10:22:34,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:22:34,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368762721] [2022-03-19 10:22:34,832 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:22:34,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248689333] [2022-03-19 10:22:34,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248689333] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:22:34,832 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:22:34,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 19 [2022-03-19 10:22:34,832 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:22:34,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1153210537] [2022-03-19 10:22:34,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1153210537] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:22:34,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:22:34,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 10:22:34,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655700238] [2022-03-19 10:22:34,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:22:34,833 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 10:22:34,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:22:34,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 10:22:34,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-03-19 10:22:34,833 INFO L87 Difference]: Start difference. First operand 142 states and 177 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-03-19 10:22:35,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:22:35,112 INFO L93 Difference]: Finished difference Result 180 states and 222 transitions. [2022-03-19 10:22:35,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 10:22:35,113 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 74 [2022-03-19 10:22:35,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:22:35,114 INFO L225 Difference]: With dead ends: 180 [2022-03-19 10:22:35,114 INFO L226 Difference]: Without dead ends: 178 [2022-03-19 10:22:35,114 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2022-03-19 10:22:35,114 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 26 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 10:22:35,115 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 209 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 10:22:35,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-03-19 10:22:35,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 164. [2022-03-19 10:22:35,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 97 states have (on average 1.1443298969072164) internal successors, (111), 100 states have internal predecessors, (111), 45 states have call successors, (45), 22 states have call predecessors, (45), 21 states have return successors, (43), 41 states have call predecessors, (43), 43 states have call successors, (43) [2022-03-19 10:22:35,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 199 transitions. [2022-03-19 10:22:35,133 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 199 transitions. Word has length 74 [2022-03-19 10:22:35,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:22:35,133 INFO L478 AbstractCegarLoop]: Abstraction has 164 states and 199 transitions. [2022-03-19 10:22:35,133 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-03-19 10:22:35,133 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 199 transitions. [2022-03-19 10:22:35,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-19 10:22:35,136 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:22:35,136 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:22:35,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-19 10:22:35,353 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,SelfDestructingSolverStorable11 [2022-03-19 10:22:35,353 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:22:35,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:22:35,353 INFO L85 PathProgramCache]: Analyzing trace with hash 15858924, now seen corresponding path program 5 times [2022-03-19 10:22:35,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:22:35,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1658666752] [2022-03-19 10:22:35,354 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:22:35,354 INFO L85 PathProgramCache]: Analyzing trace with hash 15858924, now seen corresponding path program 6 times [2022-03-19 10:22:35,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:22:35,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022717434] [2022-03-19 10:22:35,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:22:35,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:22:35,365 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:22:35,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1869413731] [2022-03-19 10:22:35,365 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 10:22:35,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:22:35,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:22:35,387 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) [2022-03-19 10:22:35,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-19 10:22:35,447 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 10:22:35,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:22:35,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-19 10:22:35,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:22:35,650 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-03-19 10:22:35,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:22:35,849 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 27 proven. 14 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2022-03-19 10:22:35,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:22:35,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022717434] [2022-03-19 10:22:35,850 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:22:35,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869413731] [2022-03-19 10:22:35,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869413731] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:22:35,850 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:22:35,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2022-03-19 10:22:35,850 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:22:35,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1658666752] [2022-03-19 10:22:35,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1658666752] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:22:35,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:22:35,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 10:22:35,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799049350] [2022-03-19 10:22:35,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:22:35,851 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 10:22:35,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:22:35,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 10:22:35,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-19 10:22:35,851 INFO L87 Difference]: Start difference. First operand 164 states and 199 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-03-19 10:22:35,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:22:35,971 INFO L93 Difference]: Finished difference Result 178 states and 218 transitions. [2022-03-19 10:22:35,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 10:22:35,971 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 79 [2022-03-19 10:22:35,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:22:35,972 INFO L225 Difference]: With dead ends: 178 [2022-03-19 10:22:35,972 INFO L226 Difference]: Without dead ends: 165 [2022-03-19 10:22:35,972 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 145 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-03-19 10:22:35,973 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 14 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:22:35,973 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 180 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:22:35,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-03-19 10:22:35,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 145. [2022-03-19 10:22:35,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 88 states have (on average 1.0909090909090908) internal successors, (96), 92 states have internal predecessors, (96), 36 states have call successors, (36), 21 states have call predecessors, (36), 20 states have return successors, (35), 31 states have call predecessors, (35), 35 states have call successors, (35) [2022-03-19 10:22:35,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 167 transitions. [2022-03-19 10:22:35,988 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 167 transitions. Word has length 79 [2022-03-19 10:22:35,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:22:35,988 INFO L478 AbstractCegarLoop]: Abstraction has 145 states and 167 transitions. [2022-03-19 10:22:35,988 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-03-19 10:22:35,988 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 167 transitions. [2022-03-19 10:22:35,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-19 10:22:35,989 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:22:35,989 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:22:36,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-19 10:22:36,205 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,SelfDestructingSolverStorable12 [2022-03-19 10:22:36,205 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:22:36,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:22:36,206 INFO L85 PathProgramCache]: Analyzing trace with hash 2066842922, now seen corresponding path program 3 times [2022-03-19 10:22:36,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:22:36,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1355812661] [2022-03-19 10:22:36,206 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:22:36,206 INFO L85 PathProgramCache]: Analyzing trace with hash 2066842922, now seen corresponding path program 4 times [2022-03-19 10:22:36,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:22:36,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647901143] [2022-03-19 10:22:36,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:22:36,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:22:36,214 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:22:36,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [644616099] [2022-03-19 10:22:36,215 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:22:36,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:22:36,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:22:36,244 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) [2022-03-19 10:22:36,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-19 10:22:36,285 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:22:36,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:22:36,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-19 10:22:36,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:22:36,680 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 38 proven. 37 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-03-19 10:22:36,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:22:37,001 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 40 proven. 26 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-03-19 10:22:37,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:22:37,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647901143] [2022-03-19 10:22:37,002 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:22:37,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644616099] [2022-03-19 10:22:37,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644616099] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:22:37,002 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:22:37,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 18 [2022-03-19 10:22:37,002 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:22:37,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1355812661] [2022-03-19 10:22:37,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1355812661] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:22:37,002 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:22:37,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 10:22:37,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669156256] [2022-03-19 10:22:37,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:22:37,003 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 10:22:37,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:22:37,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 10:22:37,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-03-19 10:22:37,003 INFO L87 Difference]: Start difference. First operand 145 states and 167 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-19 10:22:37,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:22:37,288 INFO L93 Difference]: Finished difference Result 167 states and 195 transitions. [2022-03-19 10:22:37,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 10:22:37,288 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 79 [2022-03-19 10:22:37,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:22:37,289 INFO L225 Difference]: With dead ends: 167 [2022-03-19 10:22:37,290 INFO L226 Difference]: Without dead ends: 165 [2022-03-19 10:22:37,290 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 139 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-03-19 10:22:37,291 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 25 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 10:22:37,291 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 163 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 10:22:37,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-03-19 10:22:37,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 155. [2022-03-19 10:22:37,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 94 states have (on average 1.0957446808510638) internal successors, (103), 98 states have internal predecessors, (103), 39 states have call successors, (39), 22 states have call predecessors, (39), 21 states have return successors, (38), 34 states have call predecessors, (38), 38 states have call successors, (38) [2022-03-19 10:22:37,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 180 transitions. [2022-03-19 10:22:37,311 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 180 transitions. Word has length 79 [2022-03-19 10:22:37,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:22:37,314 INFO L478 AbstractCegarLoop]: Abstraction has 155 states and 180 transitions. [2022-03-19 10:22:37,314 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-19 10:22:37,314 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 180 transitions. [2022-03-19 10:22:37,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-03-19 10:22:37,315 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:22:37,315 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:22:37,357 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-03-19 10:22:37,528 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,SelfDestructingSolverStorable13 [2022-03-19 10:22:37,529 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:22:37,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:22:37,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1804875380, now seen corresponding path program 7 times [2022-03-19 10:22:37,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:22:37,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1265255522] [2022-03-19 10:22:37,529 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:22:37,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1804875380, now seen corresponding path program 8 times [2022-03-19 10:22:37,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:22:37,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660898850] [2022-03-19 10:22:37,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:22:37,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:22:37,541 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:22:37,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [302299754] [2022-03-19 10:22:37,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:22:37,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:22:37,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:22:37,551 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) [2022-03-19 10:22:37,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-19 10:22:37,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:22:37,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:22:37,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 56 conjunts are in the unsatisfiable core [2022-03-19 10:22:37,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:22:39,626 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 63 proven. 44 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-19 10:22:39,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:22:40,307 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 75 proven. 8 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2022-03-19 10:22:40,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:22:40,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660898850] [2022-03-19 10:22:40,307 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:22:40,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302299754] [2022-03-19 10:22:40,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302299754] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:22:40,307 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:22:40,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9] total 21 [2022-03-19 10:22:40,308 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:22:40,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1265255522] [2022-03-19 10:22:40,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1265255522] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:22:40,308 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:22:40,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 10:22:40,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94491015] [2022-03-19 10:22:40,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:22:40,308 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 10:22:40,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:22:40,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 10:22:40,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-03-19 10:22:40,309 INFO L87 Difference]: Start difference. First operand 155 states and 180 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 14 states have internal predecessors, (30), 8 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2022-03-19 10:22:42,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:22:42,140 INFO L93 Difference]: Finished difference Result 183 states and 217 transitions. [2022-03-19 10:22:42,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 10:22:42,144 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 14 states have internal predecessors, (30), 8 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) Word has length 92 [2022-03-19 10:22:42,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:22:42,147 INFO L225 Difference]: With dead ends: 183 [2022-03-19 10:22:42,147 INFO L226 Difference]: Without dead ends: 181 [2022-03-19 10:22:42,148 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 162 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2022-03-19 10:22:42,149 INFO L912 BasicCegarLoop]: 33 mSDtfsCounter, 24 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-19 10:22:42,149 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 256 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 430 Invalid, 0 Unknown, 5 Unchecked, 1.8s Time] [2022-03-19 10:22:42,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-03-19 10:22:42,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 179. [2022-03-19 10:22:42,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 107 states have (on average 1.102803738317757) internal successors, (118), 112 states have internal predecessors, (118), 48 states have call successors, (48), 24 states have call predecessors, (48), 23 states have return successors, (47), 42 states have call predecessors, (47), 47 states have call successors, (47) [2022-03-19 10:22:42,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 213 transitions. [2022-03-19 10:22:42,210 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 213 transitions. Word has length 92 [2022-03-19 10:22:42,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:22:42,210 INFO L478 AbstractCegarLoop]: Abstraction has 179 states and 213 transitions. [2022-03-19 10:22:42,210 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 14 states have internal predecessors, (30), 8 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2022-03-19 10:22:42,211 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 213 transitions. [2022-03-19 10:22:42,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-03-19 10:22:42,211 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:22:42,211 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:22:42,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-19 10:22:42,423 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:22:42,423 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:22:42,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:22:42,424 INFO L85 PathProgramCache]: Analyzing trace with hash 65583604, now seen corresponding path program 9 times [2022-03-19 10:22:42,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:22:42,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [368645640] [2022-03-19 10:22:42,424 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:22:42,425 INFO L85 PathProgramCache]: Analyzing trace with hash 65583604, now seen corresponding path program 10 times [2022-03-19 10:22:42,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:22:42,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060443059] [2022-03-19 10:22:42,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:22:42,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:22:42,432 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:22:42,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [663104339] [2022-03-19 10:22:42,433 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:22:42,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:22:42,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:22:42,434 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) [2022-03-19 10:22:42,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-19 10:22:42,476 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:22:42,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:22:42,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-19 10:22:42,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:22:43,181 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 40 proven. 34 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2022-03-19 10:22:43,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:22:44,716 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:22:44,758 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 46 proven. 28 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2022-03-19 10:22:44,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:22:44,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060443059] [2022-03-19 10:22:44,758 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:22:44,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663104339] [2022-03-19 10:22:44,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663104339] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:22:44,758 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:22:44,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2022-03-19 10:22:44,759 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:22:44,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [368645640] [2022-03-19 10:22:44,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [368645640] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:22:44,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:22:44,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 10:22:44,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613090347] [2022-03-19 10:22:44,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:22:44,759 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 10:22:44,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:22:44,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 10:22:44,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-03-19 10:22:44,760 INFO L87 Difference]: Start difference. First operand 179 states and 213 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2022-03-19 10:22:45,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:22:45,162 INFO L93 Difference]: Finished difference Result 208 states and 249 transitions. [2022-03-19 10:22:45,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 10:22:45,163 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 92 [2022-03-19 10:22:45,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:22:45,164 INFO L225 Difference]: With dead ends: 208 [2022-03-19 10:22:45,164 INFO L226 Difference]: Without dead ends: 206 [2022-03-19 10:22:45,164 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 165 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2022-03-19 10:22:45,164 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 13 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 10:22:45,164 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 326 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 10:22:45,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-03-19 10:22:45,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 196. [2022-03-19 10:22:45,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 118 states have (on average 1.1101694915254237) internal successors, (131), 122 states have internal predecessors, (131), 52 states have call successors, (52), 26 states have call predecessors, (52), 25 states have return successors, (51), 47 states have call predecessors, (51), 51 states have call successors, (51) [2022-03-19 10:22:45,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 234 transitions. [2022-03-19 10:22:45,193 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 234 transitions. Word has length 92 [2022-03-19 10:22:45,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:22:45,193 INFO L478 AbstractCegarLoop]: Abstraction has 196 states and 234 transitions. [2022-03-19 10:22:45,193 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2022-03-19 10:22:45,193 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 234 transitions. [2022-03-19 10:22:45,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-03-19 10:22:45,194 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:22:45,194 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:22:45,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-19 10:22:45,407 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,SelfDestructingSolverStorable15 [2022-03-19 10:22:45,407 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:22:45,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:22:45,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1451786998, now seen corresponding path program 11 times [2022-03-19 10:22:45,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:22:45,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [86940065] [2022-03-19 10:22:45,408 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:22:45,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1451786998, now seen corresponding path program 12 times [2022-03-19 10:22:45,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:22:45,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063592889] [2022-03-19 10:22:45,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:22:45,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:22:45,414 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:22:45,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [797183085] [2022-03-19 10:22:45,414 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 10:22:45,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:22:45,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:22:45,415 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) [2022-03-19 10:22:45,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-19 10:22:45,454 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 10:22:45,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:22:45,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-19 10:22:45,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:22:45,685 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:22:45,686 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:22:48,233 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 70 proven. 11 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2022-03-19 10:22:48,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:22:50,420 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:24:13,173 WARN L855 $PredicateComparison]: unable to prove that (forall ((v_main_~p~0_BEFORE_CALL_129 Int) (v_main_~s~0_BEFORE_CALL_125 Int) (v_main_~q~0_BEFORE_CALL_125 Int) (v_main_~r~0_BEFORE_CALL_126 Int)) (or (not (= (+ (* (+ (* (- 1) v_main_~s~0_BEFORE_CALL_125) v_main_~r~0_BEFORE_CALL_126) v_main_~q~0_BEFORE_CALL_125) 1) (* (+ v_main_~p~0_BEFORE_CALL_129 (* (- 1) v_main_~q~0_BEFORE_CALL_125)) v_main_~s~0_BEFORE_CALL_125))) (and (not (= |c___VERIFIER_assert_#in~cond| 0)) (let ((.cse0 (+ (* v_main_~r~0_BEFORE_CALL_126 v_main_~q~0_BEFORE_CALL_125) 1))) (or (not (= |c___VERIFIER_assert_#in~cond| 1)) (= .cse0 0) (= (mod .cse0 v_main_~p~0_BEFORE_CALL_129) 0)))))) is different from true [2022-03-19 10:25:17,278 WARN L855 $PredicateComparison]: unable to prove that (or (forall ((v_main_~p~0_BEFORE_CALL_129 Int) (v_main_~s~0_BEFORE_CALL_125 Int) (v_main_~q~0_BEFORE_CALL_125 Int) (v_main_~r~0_BEFORE_CALL_126 Int)) (or (not (= (+ (* (+ (* (- 1) v_main_~s~0_BEFORE_CALL_125) v_main_~r~0_BEFORE_CALL_126) v_main_~q~0_BEFORE_CALL_125) 1) (* (+ v_main_~p~0_BEFORE_CALL_129 (* (- 1) v_main_~q~0_BEFORE_CALL_125)) v_main_~s~0_BEFORE_CALL_125))) (and (not (= |c___VERIFIER_assert_#in~cond| 0)) (let ((.cse0 (+ (* v_main_~r~0_BEFORE_CALL_126 v_main_~q~0_BEFORE_CALL_125) 1))) (or (not (= |c___VERIFIER_assert_#in~cond| 1)) (= .cse0 0) (= (mod .cse0 v_main_~p~0_BEFORE_CALL_129) 0)))))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-03-19 10:25:35,316 WARN L855 $PredicateComparison]: unable to prove that (or (forall ((v_main_~p~0_BEFORE_CALL_129 Int) (v_main_~s~0_BEFORE_CALL_125 Int) (v_main_~q~0_BEFORE_CALL_125 Int) (v_main_~r~0_BEFORE_CALL_126 Int)) (let ((.cse0 (+ (* v_main_~r~0_BEFORE_CALL_126 v_main_~q~0_BEFORE_CALL_125) 1))) (or (not (= (+ (* (+ (* (- 1) v_main_~s~0_BEFORE_CALL_125) v_main_~r~0_BEFORE_CALL_126) v_main_~q~0_BEFORE_CALL_125) 1) (* (+ v_main_~p~0_BEFORE_CALL_129 (* (- 1) v_main_~q~0_BEFORE_CALL_125)) v_main_~s~0_BEFORE_CALL_125))) (= .cse0 0) (= (mod .cse0 v_main_~p~0_BEFORE_CALL_129) 0)))) (not (= |c___VERIFIER_assert_#in~cond| 1))) is different from true [2022-03-19 10:25:50,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:25:50,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063592889] [2022-03-19 10:25:50,563 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:25:50,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797183085] [2022-03-19 10:25:50,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797183085] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 10:25:50,563 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 10:25:50,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-03-19 10:25:50,563 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:25:50,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [86940065] [2022-03-19 10:25:50,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [86940065] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:25:50,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:25:50,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 10:25:50,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288864630] [2022-03-19 10:25:50,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:25:50,564 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 10:25:50,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:25:50,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 10:25:50,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=186, Unknown=11, NotChecked=90, Total=342 [2022-03-19 10:25:50,564 INFO L87 Difference]: Start difference. First operand 196 states and 234 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-03-19 10:25:54,040 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 10:25:56,050 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 10:26:25,586 WARN L232 SmtUtils]: Spent 29.50s on a formula simplification. DAG size of input: 47 DAG size of output: 44 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 10:26:26,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:26:26,255 INFO L93 Difference]: Finished difference Result 224 states and 272 transitions. [2022-03-19 10:26:26,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 10:26:26,255 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 92 [2022-03-19 10:26:26,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:26:26,258 INFO L225 Difference]: With dead ends: 224 [2022-03-19 10:26:26,258 INFO L226 Difference]: Without dead ends: 222 [2022-03-19 10:26:26,258 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 60.9s TimeCoverageRelationStatistics Valid=76, Invalid=267, Unknown=11, NotChecked=108, Total=462 [2022-03-19 10:26:26,259 INFO L912 BasicCegarLoop]: 33 mSDtfsCounter, 16 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-03-19 10:26:26,259 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 198 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 172 Invalid, 1 Unknown, 0 Unchecked, 4.3s Time] [2022-03-19 10:26:26,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-03-19 10:26:26,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 220. [2022-03-19 10:26:26,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 131 states have (on average 1.1145038167938932) internal successors, (146), 136 states have internal predecessors, (146), 61 states have call successors, (61), 28 states have call predecessors, (61), 27 states have return successors, (60), 55 states have call predecessors, (60), 60 states have call successors, (60) [2022-03-19 10:26:26,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 267 transitions. [2022-03-19 10:26:26,316 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 267 transitions. Word has length 92 [2022-03-19 10:26:26,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:26:26,317 INFO L478 AbstractCegarLoop]: Abstraction has 220 states and 267 transitions. [2022-03-19 10:26:26,317 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-03-19 10:26:26,317 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 267 transitions. [2022-03-19 10:26:26,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-19 10:26:26,318 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:26:26,318 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:26:26,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-19 10:26:26,534 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-19 10:26:26,534 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:26:26,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:26:26,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1963826657, now seen corresponding path program 13 times [2022-03-19 10:26:26,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:26:26,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [835340361] [2022-03-19 10:26:26,535 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:26:26,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1963826657, now seen corresponding path program 14 times [2022-03-19 10:26:26,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:26:26,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493070460] [2022-03-19 10:26:26,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:26:26,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:26:26,542 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:26:26,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1286459943] [2022-03-19 10:26:26,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:26:26,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:26:26,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:26:26,543 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:26:26,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-19 10:26:26,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:26:26,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:26:26,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-19 10:26:26,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:26:27,046 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 71 proven. 35 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-03-19 10:26:27,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:26:27,318 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 87 proven. 5 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-03-19 10:26:27,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:26:27,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493070460] [2022-03-19 10:26:27,319 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:26:27,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286459943] [2022-03-19 10:26:27,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286459943] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:26:27,319 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:26:27,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 14 [2022-03-19 10:26:27,319 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:26:27,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [835340361] [2022-03-19 10:26:27,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [835340361] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:26:27,319 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:26:27,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 10:26:27,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329615059] [2022-03-19 10:26:27,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:26:27,320 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 10:26:27,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:26:27,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 10:26:27,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-03-19 10:26:27,320 INFO L87 Difference]: Start difference. First operand 220 states and 267 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2022-03-19 10:26:27,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:26:27,631 INFO L93 Difference]: Finished difference Result 258 states and 307 transitions. [2022-03-19 10:26:27,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 10:26:27,632 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) Word has length 97 [2022-03-19 10:26:27,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:26:27,633 INFO L225 Difference]: With dead ends: 258 [2022-03-19 10:26:27,633 INFO L226 Difference]: Without dead ends: 256 [2022-03-19 10:26:27,633 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 178 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-03-19 10:26:27,634 INFO L912 BasicCegarLoop]: 37 mSDtfsCounter, 17 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 10:26:27,634 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 279 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 10:26:27,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-03-19 10:26:27,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 242. [2022-03-19 10:26:27,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 147 states have (on average 1.1020408163265305) internal successors, (162), 153 states have internal predecessors, (162), 62 states have call successors, (62), 33 states have call predecessors, (62), 32 states have return successors, (61), 55 states have call predecessors, (61), 61 states have call successors, (61) [2022-03-19 10:26:27,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 285 transitions. [2022-03-19 10:26:27,696 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 285 transitions. Word has length 97 [2022-03-19 10:26:27,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:26:27,696 INFO L478 AbstractCegarLoop]: Abstraction has 242 states and 285 transitions. [2022-03-19 10:26:27,696 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2022-03-19 10:26:27,696 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 285 transitions. [2022-03-19 10:26:27,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-19 10:26:27,697 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:26:27,697 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:26:27,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-19 10:26:27,908 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-19 10:26:27,908 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:26:27,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:26:27,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1451182689, now seen corresponding path program 15 times [2022-03-19 10:26:27,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:26:27,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [206074669] [2022-03-19 10:26:27,909 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:26:27,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1451182689, now seen corresponding path program 16 times [2022-03-19 10:26:27,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:26:27,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238786402] [2022-03-19 10:26:27,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:26:27,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:26:27,916 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:26:27,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1129694133] [2022-03-19 10:26:27,916 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:26:27,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:26:27,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:26:27,917 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:26:27,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-19 10:26:27,957 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:26:27,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:26:27,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-19 10:26:27,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:26:29,042 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 77 proven. 41 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2022-03-19 10:26:29,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:26:29,406 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 87 proven. 5 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-03-19 10:26:29,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:26:29,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238786402] [2022-03-19 10:26:29,406 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:26:29,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129694133] [2022-03-19 10:26:29,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129694133] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:26:29,406 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:26:29,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10] total 23 [2022-03-19 10:26:29,406 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:26:29,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [206074669] [2022-03-19 10:26:29,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [206074669] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:26:29,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:26:29,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-19 10:26:29,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133758373] [2022-03-19 10:26:29,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:26:29,407 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 10:26:29,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:26:29,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 10:26:29,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2022-03-19 10:26:29,408 INFO L87 Difference]: Start difference. First operand 242 states and 285 transitions. Second operand has 18 states, 16 states have (on average 1.875) internal successors, (30), 13 states have internal predecessors, (30), 8 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 9 states have call predecessors, (16), 7 states have call successors, (16) [2022-03-19 10:26:29,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:26:29,846 INFO L93 Difference]: Finished difference Result 297 states and 347 transitions. [2022-03-19 10:26:29,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 10:26:29,846 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.875) internal successors, (30), 13 states have internal predecessors, (30), 8 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 9 states have call predecessors, (16), 7 states have call successors, (16) Word has length 97 [2022-03-19 10:26:29,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:26:29,847 INFO L225 Difference]: With dead ends: 297 [2022-03-19 10:26:29,847 INFO L226 Difference]: Without dead ends: 242 [2022-03-19 10:26:29,849 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 171 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2022-03-19 10:26:29,850 INFO L912 BasicCegarLoop]: 33 mSDtfsCounter, 21 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 10:26:29,850 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 301 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 10:26:29,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-03-19 10:26:29,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 242. [2022-03-19 10:26:29,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 147 states have (on average 1.0952380952380953) internal successors, (161), 153 states have internal predecessors, (161), 62 states have call successors, (62), 33 states have call predecessors, (62), 32 states have return successors, (61), 55 states have call predecessors, (61), 61 states have call successors, (61) [2022-03-19 10:26:29,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 284 transitions. [2022-03-19 10:26:29,913 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 284 transitions. Word has length 97 [2022-03-19 10:26:29,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:26:29,913 INFO L478 AbstractCegarLoop]: Abstraction has 242 states and 284 transitions. [2022-03-19 10:26:29,914 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 1.875) internal successors, (30), 13 states have internal predecessors, (30), 8 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 9 states have call predecessors, (16), 7 states have call successors, (16) [2022-03-19 10:26:29,914 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 284 transitions. [2022-03-19 10:26:29,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-19 10:26:29,914 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:26:29,915 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:26:29,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-19 10:26:30,131 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:26:30,131 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:26:30,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:26:30,132 INFO L85 PathProgramCache]: Analyzing trace with hash -792800609, now seen corresponding path program 5 times [2022-03-19 10:26:30,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:26:30,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1374505850] [2022-03-19 10:26:30,132 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:26:30,132 INFO L85 PathProgramCache]: Analyzing trace with hash -792800609, now seen corresponding path program 6 times [2022-03-19 10:26:30,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:26:30,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167258357] [2022-03-19 10:26:30,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:26:30,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:26:30,138 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:26:30,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [7343543] [2022-03-19 10:26:30,138 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 10:26:30,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:26:30,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:26:30,139 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:26:30,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-19 10:26:30,183 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 10:26:30,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:26:30,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-19 10:26:30,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:26:30,468 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 104 proven. 6 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2022-03-19 10:26:30,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:26:30,848 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 107 proven. 3 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2022-03-19 10:26:30,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:26:30,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167258357] [2022-03-19 10:26:30,849 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:26:30,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7343543] [2022-03-19 10:26:30,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7343543] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:26:30,849 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:26:30,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2022-03-19 10:26:30,849 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:26:30,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1374505850] [2022-03-19 10:26:30,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1374505850] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:26:30,849 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:26:30,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 10:26:30,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464724659] [2022-03-19 10:26:30,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:26:30,850 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 10:26:30,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:26:30,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 10:26:30,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-03-19 10:26:30,850 INFO L87 Difference]: Start difference. First operand 242 states and 284 transitions. Second operand has 10 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-19 10:26:30,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:26:30,986 INFO L93 Difference]: Finished difference Result 261 states and 307 transitions. [2022-03-19 10:26:30,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 10:26:30,987 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 97 [2022-03-19 10:26:30,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:26:30,988 INFO L225 Difference]: With dead ends: 261 [2022-03-19 10:26:30,988 INFO L226 Difference]: Without dead ends: 259 [2022-03-19 10:26:30,988 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 178 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-03-19 10:26:30,988 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 17 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:26:30,989 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 137 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:26:30,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-03-19 10:26:31,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 226. [2022-03-19 10:26:31,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 139 states have (on average 1.0935251798561152) internal successors, (152), 143 states have internal predecessors, (152), 55 states have call successors, (55), 32 states have call predecessors, (55), 31 states have return successors, (54), 50 states have call predecessors, (54), 54 states have call successors, (54) [2022-03-19 10:26:31,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 261 transitions. [2022-03-19 10:26:31,028 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 261 transitions. Word has length 97 [2022-03-19 10:26:31,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:26:31,028 INFO L478 AbstractCegarLoop]: Abstraction has 226 states and 261 transitions. [2022-03-19 10:26:31,028 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-19 10:26:31,028 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 261 transitions. [2022-03-19 10:26:31,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-19 10:26:31,029 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:26:31,029 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:26:31,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-19 10:26:31,243 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:26:31,243 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:26:31,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:26:31,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1750450403, now seen corresponding path program 17 times [2022-03-19 10:26:31,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:26:31,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1098768968] [2022-03-19 10:26:31,244 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:26:31,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1750450403, now seen corresponding path program 18 times [2022-03-19 10:26:31,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:26:31,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001852433] [2022-03-19 10:26:31,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:26:31,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:26:31,251 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:26:31,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1818860223] [2022-03-19 10:26:31,251 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 10:26:31,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:26:31,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:26:31,252 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:26:31,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-19 10:26:31,554 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 10:26:31,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:26:31,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-19 10:26:31,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:26:44,637 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:26:44,925 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 91 proven. 53 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2022-03-19 10:26:44,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:26:55,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:26:55,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001852433] [2022-03-19 10:26:55,074 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:26:55,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818860223] [2022-03-19 10:26:55,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818860223] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 10:26:55,074 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 10:26:55,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-03-19 10:26:55,074 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:26:55,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1098768968] [2022-03-19 10:26:55,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1098768968] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:26:55,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:26:55,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 10:26:55,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398689585] [2022-03-19 10:26:55,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:26:55,075 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 10:26:55,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:26:55,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 10:26:55,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=425, Unknown=2, NotChecked=0, Total=506 [2022-03-19 10:26:55,075 INFO L87 Difference]: Start difference. First operand 226 states and 261 transitions. Second operand has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) [2022-03-19 10:26:57,193 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 10:27:05,370 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 10:27:10,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:27:10,596 INFO L93 Difference]: Finished difference Result 271 states and 316 transitions. [2022-03-19 10:27:10,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 10:27:10,621 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) Word has length 110 [2022-03-19 10:27:10,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:27:10,623 INFO L225 Difference]: With dead ends: 271 [2022-03-19 10:27:10,623 INFO L226 Difference]: Without dead ends: 269 [2022-03-19 10:27:10,623 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=105, Invalid=595, Unknown=2, NotChecked=0, Total=702 [2022-03-19 10:27:10,624 INFO L912 BasicCegarLoop]: 35 mSDtfsCounter, 27 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.3s IncrementalHoareTripleChecker+Time [2022-03-19 10:27:10,624 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 246 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 10.3s Time] [2022-03-19 10:27:10,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-03-19 10:27:10,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 237. [2022-03-19 10:27:10,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 147 states have (on average 1.0952380952380953) internal successors, (161), 150 states have internal predecessors, (161), 56 states have call successors, (56), 34 states have call predecessors, (56), 33 states have return successors, (55), 52 states have call predecessors, (55), 55 states have call successors, (55) [2022-03-19 10:27:10,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 272 transitions. [2022-03-19 10:27:10,670 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 272 transitions. Word has length 110 [2022-03-19 10:27:10,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:27:10,671 INFO L478 AbstractCegarLoop]: Abstraction has 237 states and 272 transitions. [2022-03-19 10:27:10,671 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) [2022-03-19 10:27:10,671 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 272 transitions. [2022-03-19 10:27:10,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-19 10:27:10,673 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:27:10,673 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:27:10,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-19 10:27:10,873 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-03-19 10:27:10,873 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:27:10,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:27:10,874 INFO L85 PathProgramCache]: Analyzing trace with hash 805225117, now seen corresponding path program 19 times [2022-03-19 10:27:10,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:27:10,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1190131880] [2022-03-19 10:27:10,875 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:27:10,875 INFO L85 PathProgramCache]: Analyzing trace with hash 805225117, now seen corresponding path program 20 times [2022-03-19 10:27:10,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:27:10,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487573555] [2022-03-19 10:27:10,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:27:10,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:27:10,880 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:27:10,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [635418324] [2022-03-19 10:27:10,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:27:10,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:27:10,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:27:10,892 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:27:10,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-19 10:27:10,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:27:10,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:27:10,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-19 10:27:10,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:27:11,176 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 107 proven. 22 refuted. 0 times theorem prover too weak. 281 trivial. 0 not checked. [2022-03-19 10:27:11,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:27:11,478 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 38 proven. 45 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2022-03-19 10:27:11,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:27:11,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487573555] [2022-03-19 10:27:11,478 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:27:11,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635418324] [2022-03-19 10:27:11,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635418324] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:27:11,478 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:27:11,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-03-19 10:27:11,478 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:27:11,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1190131880] [2022-03-19 10:27:11,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1190131880] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:27:11,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:27:11,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 10:27:11,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940666507] [2022-03-19 10:27:11,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:27:11,479 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 10:27:11,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:27:11,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 10:27:11,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-03-19 10:27:11,480 INFO L87 Difference]: Start difference. First operand 237 states and 272 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2022-03-19 10:27:11,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:27:11,697 INFO L93 Difference]: Finished difference Result 319 states and 393 transitions. [2022-03-19 10:27:11,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 10:27:11,698 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) Word has length 110 [2022-03-19 10:27:11,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:27:11,699 INFO L225 Difference]: With dead ends: 319 [2022-03-19 10:27:11,699 INFO L226 Difference]: Without dead ends: 291 [2022-03-19 10:27:11,699 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2022-03-19 10:27:11,700 INFO L912 BasicCegarLoop]: 49 mSDtfsCounter, 14 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:27:11,700 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 234 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:27:11,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-03-19 10:27:11,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 291. [2022-03-19 10:27:11,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 174 states have (on average 1.1206896551724137) internal successors, (195), 177 states have internal predecessors, (195), 83 states have call successors, (83), 34 states have call predecessors, (83), 33 states have return successors, (82), 79 states have call predecessors, (82), 82 states have call successors, (82) [2022-03-19 10:27:11,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 360 transitions. [2022-03-19 10:27:11,772 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 360 transitions. Word has length 110 [2022-03-19 10:27:11,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:27:11,772 INFO L478 AbstractCegarLoop]: Abstraction has 291 states and 360 transitions. [2022-03-19 10:27:11,773 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2022-03-19 10:27:11,773 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 360 transitions. [2022-03-19 10:27:11,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-19 10:27:11,774 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:27:11,774 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:27:11,805 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-03-19 10:27:11,987 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-19 10:27:11,988 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:27:11,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:27:11,988 INFO L85 PathProgramCache]: Analyzing trace with hash -2103538785, now seen corresponding path program 21 times [2022-03-19 10:27:11,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:27:11,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [545484023] [2022-03-19 10:27:11,988 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:27:11,988 INFO L85 PathProgramCache]: Analyzing trace with hash -2103538785, now seen corresponding path program 22 times [2022-03-19 10:27:11,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:27:11,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949615747] [2022-03-19 10:27:11,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:27:11,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:27:11,994 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:27:11,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [225394355] [2022-03-19 10:27:11,994 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:27:11,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:27:11,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:27:11,996 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:27:11,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-19 10:27:12,036 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:27:12,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:27:12,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-19 10:27:12,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:27:12,254 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 90 proven. 39 refuted. 0 times theorem prover too weak. 281 trivial. 0 not checked. [2022-03-19 10:27:12,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:27:12,553 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 38 proven. 45 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2022-03-19 10:27:12,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:27:12,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949615747] [2022-03-19 10:27:12,553 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:27:12,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225394355] [2022-03-19 10:27:12,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225394355] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:27:12,554 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:27:12,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-03-19 10:27:12,554 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:27:12,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [545484023] [2022-03-19 10:27:12,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [545484023] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:27:12,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:27:12,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 10:27:12,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393670136] [2022-03-19 10:27:12,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:27:12,554 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 10:27:12,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:27:12,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 10:27:12,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-03-19 10:27:12,555 INFO L87 Difference]: Start difference. First operand 291 states and 360 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2022-03-19 10:27:12,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:27:12,765 INFO L93 Difference]: Finished difference Result 355 states and 450 transitions. [2022-03-19 10:27:12,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 10:27:12,780 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) Word has length 110 [2022-03-19 10:27:12,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:27:12,781 INFO L225 Difference]: With dead ends: 355 [2022-03-19 10:27:12,781 INFO L226 Difference]: Without dead ends: 287 [2022-03-19 10:27:12,781 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2022-03-19 10:27:12,782 INFO L912 BasicCegarLoop]: 49 mSDtfsCounter, 14 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:27:12,782 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 302 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:27:12,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-03-19 10:27:12,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 285. [2022-03-19 10:27:12,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 169 states have (on average 1.106508875739645) internal successors, (187), 173 states have internal predecessors, (187), 83 states have call successors, (83), 33 states have call predecessors, (83), 32 states have return successors, (82), 78 states have call predecessors, (82), 82 states have call successors, (82) [2022-03-19 10:27:12,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 352 transitions. [2022-03-19 10:27:12,860 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 352 transitions. Word has length 110 [2022-03-19 10:27:12,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:27:12,860 INFO L478 AbstractCegarLoop]: Abstraction has 285 states and 352 transitions. [2022-03-19 10:27:12,860 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2022-03-19 10:27:12,860 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 352 transitions. [2022-03-19 10:27:12,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-19 10:27:12,861 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:27:12,861 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:27:12,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-19 10:27:13,071 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:27:13,071 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:27:13,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:27:13,072 INFO L85 PathProgramCache]: Analyzing trace with hash -527866339, now seen corresponding path program 23 times [2022-03-19 10:27:13,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:27:13,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [855025207] [2022-03-19 10:27:13,072 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:27:13,072 INFO L85 PathProgramCache]: Analyzing trace with hash -527866339, now seen corresponding path program 24 times [2022-03-19 10:27:13,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:27:13,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627213958] [2022-03-19 10:27:13,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:27:13,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:27:13,077 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:27:13,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1273623835] [2022-03-19 10:27:13,077 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 10:27:13,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:27:13,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:27:13,078 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:27:13,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-19 10:27:13,363 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 10:27:13,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:27:13,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 60 conjunts are in the unsatisfiable core [2022-03-19 10:27:13,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:27:15,136 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 115 proven. 48 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2022-03-19 10:27:15,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:27:18,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:27:18,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627213958] [2022-03-19 10:27:18,538 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:27:18,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273623835] [2022-03-19 10:27:18,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273623835] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 10:27:18,539 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 10:27:18,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-03-19 10:27:18,539 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:27:18,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [855025207] [2022-03-19 10:27:18,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [855025207] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:27:18,539 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:27:18,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-19 10:27:18,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103674841] [2022-03-19 10:27:18,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:27:18,539 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 10:27:18,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:27:18,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 10:27:18,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2022-03-19 10:27:18,540 INFO L87 Difference]: Start difference. First operand 285 states and 352 transitions. Second operand has 18 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 10 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 9 states have call predecessors, (15), 9 states have call successors, (15) [2022-03-19 10:27:19,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:27:19,507 INFO L93 Difference]: Finished difference Result 321 states and 396 transitions. [2022-03-19 10:27:19,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 10:27:19,511 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 10 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 9 states have call predecessors, (15), 9 states have call successors, (15) Word has length 110 [2022-03-19 10:27:19,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:27:19,512 INFO L225 Difference]: With dead ends: 321 [2022-03-19 10:27:19,512 INFO L226 Difference]: Without dead ends: 319 [2022-03-19 10:27:19,515 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 108 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=142, Invalid=670, Unknown=0, NotChecked=0, Total=812 [2022-03-19 10:27:19,516 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 37 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 10:27:19,516 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 192 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 261 Invalid, 0 Unknown, 38 Unchecked, 0.6s Time] [2022-03-19 10:27:19,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-03-19 10:27:19,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 299. [2022-03-19 10:27:19,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 178 states have (on average 1.1067415730337078) internal successors, (197), 182 states have internal predecessors, (197), 86 states have call successors, (86), 35 states have call predecessors, (86), 34 states have return successors, (85), 81 states have call predecessors, (85), 85 states have call successors, (85) [2022-03-19 10:27:19,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 368 transitions. [2022-03-19 10:27:19,603 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 368 transitions. Word has length 110 [2022-03-19 10:27:19,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:27:19,605 INFO L478 AbstractCegarLoop]: Abstraction has 299 states and 368 transitions. [2022-03-19 10:27:19,605 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 10 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 9 states have call predecessors, (15), 9 states have call successors, (15) [2022-03-19 10:27:19,605 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 368 transitions. [2022-03-19 10:27:19,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-19 10:27:19,606 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:27:19,606 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:27:19,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-19 10:27:19,811 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:27:19,812 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:27:19,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:27:19,812 INFO L85 PathProgramCache]: Analyzing trace with hash -880954721, now seen corresponding path program 25 times [2022-03-19 10:27:19,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:27:19,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1721903118] [2022-03-19 10:27:19,812 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:27:19,812 INFO L85 PathProgramCache]: Analyzing trace with hash -880954721, now seen corresponding path program 26 times [2022-03-19 10:27:19,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:27:19,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641713027] [2022-03-19 10:27:19,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:27:19,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:27:19,818 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:27:19,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2116467498] [2022-03-19 10:27:19,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:27:19,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:27:19,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:27:19,828 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:27:19,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-19 10:27:19,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:27:19,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:27:19,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-19 10:27:19,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:27:20,137 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 98 proven. 31 refuted. 0 times theorem prover too weak. 281 trivial. 0 not checked. [2022-03-19 10:27:20,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:27:20,474 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 41 proven. 42 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2022-03-19 10:27:20,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:27:20,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641713027] [2022-03-19 10:27:20,475 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:27:20,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116467498] [2022-03-19 10:27:20,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116467498] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:27:20,475 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:27:20,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-03-19 10:27:20,475 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:27:20,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1721903118] [2022-03-19 10:27:20,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1721903118] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:27:20,476 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:27:20,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 10:27:20,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536716896] [2022-03-19 10:27:20,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:27:20,476 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 10:27:20,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:27:20,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 10:27:20,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-03-19 10:27:20,477 INFO L87 Difference]: Start difference. First operand 299 states and 368 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2022-03-19 10:27:20,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:27:20,813 INFO L93 Difference]: Finished difference Result 453 states and 601 transitions. [2022-03-19 10:27:20,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 10:27:20,814 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) Word has length 110 [2022-03-19 10:27:20,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:27:20,815 INFO L225 Difference]: With dead ends: 453 [2022-03-19 10:27:20,816 INFO L226 Difference]: Without dead ends: 415 [2022-03-19 10:27:20,816 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2022-03-19 10:27:20,816 INFO L912 BasicCegarLoop]: 56 mSDtfsCounter, 17 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:27:20,816 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 303 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:27:20,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2022-03-19 10:27:20,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 365. [2022-03-19 10:27:20,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 211 states have (on average 1.1374407582938388) internal successors, (240), 215 states have internal predecessors, (240), 119 states have call successors, (119), 35 states have call predecessors, (119), 34 states have return successors, (118), 114 states have call predecessors, (118), 118 states have call successors, (118) [2022-03-19 10:27:20,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 477 transitions. [2022-03-19 10:27:20,950 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 477 transitions. Word has length 110 [2022-03-19 10:27:20,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:27:20,950 INFO L478 AbstractCegarLoop]: Abstraction has 365 states and 477 transitions. [2022-03-19 10:27:20,950 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2022-03-19 10:27:20,950 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 477 transitions. [2022-03-19 10:27:20,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-03-19 10:27:20,951 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:27:20,951 INFO L500 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:27:20,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-19 10:27:21,167 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-03-19 10:27:21,167 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:27:21,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:27:21,168 INFO L85 PathProgramCache]: Analyzing trace with hash 769627864, now seen corresponding path program 27 times [2022-03-19 10:27:21,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:27:21,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1335789595] [2022-03-19 10:27:21,168 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:27:21,168 INFO L85 PathProgramCache]: Analyzing trace with hash 769627864, now seen corresponding path program 28 times [2022-03-19 10:27:21,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:27:21,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971555795] [2022-03-19 10:27:21,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:27:21,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:27:21,173 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:27:21,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [559932271] [2022-03-19 10:27:21,173 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:27:21,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:27:21,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:27:21,175 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:27:21,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-19 10:27:21,216 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:27:21,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:27:21,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-19 10:27:21,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:27:21,445 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 148 proven. 33 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2022-03-19 10:27:21,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:27:21,768 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 44 proven. 45 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2022-03-19 10:27:21,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:27:21,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971555795] [2022-03-19 10:27:21,768 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:27:21,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559932271] [2022-03-19 10:27:21,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559932271] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:27:21,768 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:27:21,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-03-19 10:27:21,769 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:27:21,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1335789595] [2022-03-19 10:27:21,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1335789595] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:27:21,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:27:21,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 10:27:21,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455414758] [2022-03-19 10:27:21,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:27:21,769 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 10:27:21,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:27:21,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 10:27:21,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-03-19 10:27:21,770 INFO L87 Difference]: Start difference. First operand 365 states and 477 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 7 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-19 10:27:22,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:27:22,039 INFO L93 Difference]: Finished difference Result 415 states and 537 transitions. [2022-03-19 10:27:22,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 10:27:22,040 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 7 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) Word has length 115 [2022-03-19 10:27:22,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:27:22,042 INFO L225 Difference]: With dead ends: 415 [2022-03-19 10:27:22,042 INFO L226 Difference]: Without dead ends: 337 [2022-03-19 10:27:22,043 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2022-03-19 10:27:22,043 INFO L912 BasicCegarLoop]: 49 mSDtfsCounter, 12 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:27:22,045 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 260 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:27:22,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2022-03-19 10:27:22,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 307. [2022-03-19 10:27:22,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 182 states have (on average 1.098901098901099) internal successors, (200), 187 states have internal predecessors, (200), 90 states have call successors, (90), 35 states have call predecessors, (90), 34 states have return successors, (89), 84 states have call predecessors, (89), 89 states have call successors, (89) [2022-03-19 10:27:22,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 379 transitions. [2022-03-19 10:27:22,151 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 379 transitions. Word has length 115 [2022-03-19 10:27:22,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:27:22,151 INFO L478 AbstractCegarLoop]: Abstraction has 307 states and 379 transitions. [2022-03-19 10:27:22,151 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 7 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-19 10:27:22,151 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 379 transitions. [2022-03-19 10:27:22,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-03-19 10:27:22,153 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:27:22,153 INFO L500 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:27:22,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-19 10:27:22,372 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-19 10:27:22,372 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:27:22,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:27:22,373 INFO L85 PathProgramCache]: Analyzing trace with hash 256983896, now seen corresponding path program 29 times [2022-03-19 10:27:22,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:27:22,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [755410658] [2022-03-19 10:27:22,373 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:27:22,373 INFO L85 PathProgramCache]: Analyzing trace with hash 256983896, now seen corresponding path program 30 times [2022-03-19 10:27:22,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:27:22,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741686607] [2022-03-19 10:27:22,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:27:22,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:27:22,379 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:27:22,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1449981878] [2022-03-19 10:27:22,379 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 10:27:22,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:27:22,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:27:22,380 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:27:22,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-19 10:27:22,686 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 10:27:22,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:27:22,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 61 conjunts are in the unsatisfiable core [2022-03-19 10:27:22,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:28:25,654 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 130 proven. 54 refuted. 1 times theorem prover too weak. 283 trivial. 0 not checked. [2022-03-19 10:28:25,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:28:37,461 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 146 proven. 3 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2022-03-19 10:28:37,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:28:37,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741686607] [2022-03-19 10:28:37,462 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:28:37,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449981878] [2022-03-19 10:28:37,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449981878] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:28:37,462 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:28:37,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11] total 25 [2022-03-19 10:28:37,463 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:28:37,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [755410658] [2022-03-19 10:28:37,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [755410658] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:28:37,463 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:28:37,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-19 10:28:37,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220307599] [2022-03-19 10:28:37,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:28:37,469 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 10:28:37,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:28:37,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 10:28:37,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=474, Unknown=6, NotChecked=0, Total=600 [2022-03-19 10:28:37,469 INFO L87 Difference]: Start difference. First operand 307 states and 379 transitions. Second operand has 18 states, 16 states have (on average 1.9375) internal successors, (31), 13 states have internal predecessors, (31), 8 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 9 states have call predecessors, (16), 7 states have call successors, (16) [2022-03-19 10:28:45,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:28:45,163 INFO L93 Difference]: Finished difference Result 448 states and 571 transitions. [2022-03-19 10:28:45,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-19 10:28:45,163 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.9375) internal successors, (31), 13 states have internal predecessors, (31), 8 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 9 states have call predecessors, (16), 7 states have call successors, (16) Word has length 115 [2022-03-19 10:28:45,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:28:45,165 INFO L225 Difference]: With dead ends: 448 [2022-03-19 10:28:45,165 INFO L226 Difference]: Without dead ends: 326 [2022-03-19 10:28:45,166 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 205 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 42.6s TimeCoverageRelationStatistics Valid=138, Invalid=612, Unknown=6, NotChecked=0, Total=756 [2022-03-19 10:28:45,166 INFO L912 BasicCegarLoop]: 32 mSDtfsCounter, 34 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 10:28:45,166 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 277 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 406 Invalid, 0 Unknown, 15 Unchecked, 0.6s Time] [2022-03-19 10:28:45,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-03-19 10:28:45,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 318. [2022-03-19 10:28:45,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 189 states have (on average 1.0952380952380953) internal successors, (207), 192 states have internal predecessors, (207), 94 states have call successors, (94), 35 states have call predecessors, (94), 34 states have return successors, (93), 90 states have call predecessors, (93), 93 states have call successors, (93) [2022-03-19 10:28:45,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 394 transitions. [2022-03-19 10:28:45,279 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 394 transitions. Word has length 115 [2022-03-19 10:28:45,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:28:45,280 INFO L478 AbstractCegarLoop]: Abstraction has 318 states and 394 transitions. [2022-03-19 10:28:45,280 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 1.9375) internal successors, (31), 13 states have internal predecessors, (31), 8 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 9 states have call predecessors, (16), 7 states have call successors, (16) [2022-03-19 10:28:45,280 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 394 transitions. [2022-03-19 10:28:45,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-03-19 10:28:45,280 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:28:45,280 INFO L500 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:28:45,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-19 10:28:45,485 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-19 10:28:45,485 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:28:45,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:28:45,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1986999402, now seen corresponding path program 31 times [2022-03-19 10:28:45,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:28:45,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [264168017] [2022-03-19 10:28:45,486 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:28:45,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1986999402, now seen corresponding path program 32 times [2022-03-19 10:28:45,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:28:45,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104672572] [2022-03-19 10:28:45,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:28:45,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:28:45,496 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:28:45,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1310030149] [2022-03-19 10:28:45,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:28:45,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:28:45,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:28:45,497 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:28:45,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-19 10:28:45,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:28:45,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:28:45,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 66 conjunts are in the unsatisfiable core [2022-03-19 10:28:45,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:28:46,358 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 103 proven. 85 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2022-03-19 10:28:46,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:28:46,601 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 117 proven. 5 refuted. 0 times theorem prover too weak. 346 trivial. 0 not checked. [2022-03-19 10:28:46,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:28:46,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104672572] [2022-03-19 10:28:46,602 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:28:46,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310030149] [2022-03-19 10:28:46,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310030149] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:28:46,602 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:28:46,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10] total 21 [2022-03-19 10:28:46,602 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:28:46,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [264168017] [2022-03-19 10:28:46,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [264168017] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:28:46,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:28:46,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 10:28:46,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629491711] [2022-03-19 10:28:46,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:28:46,603 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 10:28:46,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:28:46,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 10:28:46,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2022-03-19 10:28:46,604 INFO L87 Difference]: Start difference. First operand 318 states and 394 transitions. Second operand has 16 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-19 10:28:47,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:28:47,077 INFO L93 Difference]: Finished difference Result 369 states and 448 transitions. [2022-03-19 10:28:47,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 10:28:47,078 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) Word has length 115 [2022-03-19 10:28:47,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:28:47,079 INFO L225 Difference]: With dead ends: 369 [2022-03-19 10:28:47,079 INFO L226 Difference]: Without dead ends: 280 [2022-03-19 10:28:47,079 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 207 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2022-03-19 10:28:47,080 INFO L912 BasicCegarLoop]: 35 mSDtfsCounter, 25 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 10:28:47,080 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 299 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 10:28:47,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-03-19 10:28:47,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 280. [2022-03-19 10:28:47,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 167 states have (on average 1.095808383233533) internal successors, (183), 169 states have internal predecessors, (183), 82 states have call successors, (82), 31 states have call predecessors, (82), 30 states have return successors, (81), 79 states have call predecessors, (81), 81 states have call successors, (81) [2022-03-19 10:28:47,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 346 transitions. [2022-03-19 10:28:47,168 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 346 transitions. Word has length 115 [2022-03-19 10:28:47,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:28:47,168 INFO L478 AbstractCegarLoop]: Abstraction has 280 states and 346 transitions. [2022-03-19 10:28:47,168 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-19 10:28:47,168 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 346 transitions. [2022-03-19 10:28:47,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-03-19 10:28:47,169 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:28:47,169 INFO L500 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:28:47,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-19 10:28:47,382 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-19 10:28:47,382 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:28:47,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:28:47,382 INFO L85 PathProgramCache]: Analyzing trace with hash 627101656, now seen corresponding path program 33 times [2022-03-19 10:28:47,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:28:47,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1424032194] [2022-03-19 10:28:47,383 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:28:47,383 INFO L85 PathProgramCache]: Analyzing trace with hash 627101656, now seen corresponding path program 34 times [2022-03-19 10:28:47,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:28:47,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536162336] [2022-03-19 10:28:47,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:28:47,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:28:47,394 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:28:47,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1600359831] [2022-03-19 10:28:47,394 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:28:47,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:28:47,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:28:47,397 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:28:47,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-19 10:28:47,439 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:28:47,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:28:47,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-19 10:28:47,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:28:47,622 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 145 proven. 36 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2022-03-19 10:28:47,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:28:47,899 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 47 proven. 42 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2022-03-19 10:28:47,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:28:47,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536162336] [2022-03-19 10:28:47,900 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:28:47,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600359831] [2022-03-19 10:28:47,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600359831] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:28:47,900 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:28:47,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-03-19 10:28:47,900 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:28:47,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1424032194] [2022-03-19 10:28:47,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1424032194] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:28:47,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:28:47,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 10:28:47,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388558280] [2022-03-19 10:28:47,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:28:47,901 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 10:28:47,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:28:47,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 10:28:47,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-03-19 10:28:47,902 INFO L87 Difference]: Start difference. First operand 280 states and 346 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 7 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-19 10:28:48,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:28:48,116 INFO L93 Difference]: Finished difference Result 328 states and 408 transitions. [2022-03-19 10:28:48,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 10:28:48,117 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 7 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) Word has length 115 [2022-03-19 10:28:48,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:28:48,119 INFO L225 Difference]: With dead ends: 328 [2022-03-19 10:28:48,119 INFO L226 Difference]: Without dead ends: 267 [2022-03-19 10:28:48,119 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2022-03-19 10:28:48,120 INFO L912 BasicCegarLoop]: 49 mSDtfsCounter, 14 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:28:48,120 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 269 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:28:48,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-03-19 10:28:48,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 267. [2022-03-19 10:28:48,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 157 states have (on average 1.0955414012738853) internal successors, (172), 158 states have internal predecessors, (172), 83 states have call successors, (83), 27 states have call predecessors, (83), 26 states have return successors, (82), 81 states have call predecessors, (82), 82 states have call successors, (82) [2022-03-19 10:28:48,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 337 transitions. [2022-03-19 10:28:48,196 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 337 transitions. Word has length 115 [2022-03-19 10:28:48,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:28:48,196 INFO L478 AbstractCegarLoop]: Abstraction has 267 states and 337 transitions. [2022-03-19 10:28:48,196 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 7 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-19 10:28:48,196 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 337 transitions. [2022-03-19 10:28:48,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-03-19 10:28:48,197 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:28:48,197 INFO L500 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:28:48,213 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-03-19 10:28:48,405 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-19 10:28:48,405 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:28:48,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:28:48,405 INFO L85 PathProgramCache]: Analyzing trace with hash -2129525610, now seen corresponding path program 35 times [2022-03-19 10:28:48,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:28:48,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [288066626] [2022-03-19 10:28:48,406 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:28:48,406 INFO L85 PathProgramCache]: Analyzing trace with hash -2129525610, now seen corresponding path program 36 times [2022-03-19 10:28:48,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:28:48,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845873597] [2022-03-19 10:28:48,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:28:48,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:28:48,415 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:28:48,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [440118103] [2022-03-19 10:28:48,416 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 10:28:48,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:28:48,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:28:48,417 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:28:48,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-19 10:28:48,482 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 10:28:48,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:28:48,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-19 10:28:48,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:28:50,820 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 95 proven. 39 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2022-03-19 10:28:50,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:28:51,109 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 117 proven. 5 refuted. 0 times theorem prover too weak. 346 trivial. 0 not checked. [2022-03-19 10:28:51,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:28:51,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845873597] [2022-03-19 10:28:51,110 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:28:51,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440118103] [2022-03-19 10:28:51,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440118103] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:28:51,110 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:28:51,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 14 [2022-03-19 10:28:51,110 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:28:51,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [288066626] [2022-03-19 10:28:51,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [288066626] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:28:51,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:28:51,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 10:28:51,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171244629] [2022-03-19 10:28:51,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:28:51,111 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 10:28:51,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:28:51,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 10:28:51,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-03-19 10:28:51,111 INFO L87 Difference]: Start difference. First operand 267 states and 337 transitions. Second operand has 11 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-19 10:28:52,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:28:52,434 INFO L93 Difference]: Finished difference Result 291 states and 360 transitions. [2022-03-19 10:28:52,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 10:28:52,435 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) Word has length 115 [2022-03-19 10:28:52,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:28:52,449 INFO L225 Difference]: With dead ends: 291 [2022-03-19 10:28:52,449 INFO L226 Difference]: Without dead ends: 289 [2022-03-19 10:28:52,450 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 215 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-03-19 10:28:52,450 INFO L912 BasicCegarLoop]: 35 mSDtfsCounter, 15 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-19 10:28:52,450 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 265 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-19 10:28:52,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-03-19 10:28:52,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 287. [2022-03-19 10:28:52,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 170 states have (on average 1.088235294117647) internal successors, (185), 172 states have internal predecessors, (185), 86 states have call successors, (86), 31 states have call predecessors, (86), 30 states have return successors, (85), 83 states have call predecessors, (85), 85 states have call successors, (85) [2022-03-19 10:28:52,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 356 transitions. [2022-03-19 10:28:52,630 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 356 transitions. Word has length 115 [2022-03-19 10:28:52,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:28:52,630 INFO L478 AbstractCegarLoop]: Abstraction has 287 states and 356 transitions. [2022-03-19 10:28:52,630 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-19 10:28:52,630 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 356 transitions. [2022-03-19 10:28:52,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-03-19 10:28:52,631 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:28:52,647 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:28:52,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-19 10:28:52,864 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:28:52,864 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:28:52,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:28:52,865 INFO L85 PathProgramCache]: Analyzing trace with hash 759132938, now seen corresponding path program 37 times [2022-03-19 10:28:52,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:28:52,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [579333852] [2022-03-19 10:28:52,865 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:28:52,865 INFO L85 PathProgramCache]: Analyzing trace with hash 759132938, now seen corresponding path program 38 times [2022-03-19 10:28:52,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:28:52,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297136224] [2022-03-19 10:28:52,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:28:52,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:28:52,870 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:28:52,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1032075769] [2022-03-19 10:28:52,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:28:52,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:28:52,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:28:52,875 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:28:52,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-19 10:28:52,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:28:52,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:28:52,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-19 10:28:52,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:28:53,180 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 261 proven. 36 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2022-03-19 10:28:53,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:28:53,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:28:53,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297136224] [2022-03-19 10:28:53,514 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:28:53,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032075769] [2022-03-19 10:28:53,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032075769] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 10:28:53,514 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 10:28:53,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-03-19 10:28:53,515 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:28:53,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [579333852] [2022-03-19 10:28:53,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [579333852] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:28:53,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:28:53,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 10:28:53,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452702091] [2022-03-19 10:28:53,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:28:53,515 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 10:28:53,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:28:53,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 10:28:53,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-03-19 10:28:53,516 INFO L87 Difference]: Start difference. First operand 287 states and 356 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 7 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2022-03-19 10:28:53,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:28:53,749 INFO L93 Difference]: Finished difference Result 385 states and 485 transitions. [2022-03-19 10:28:53,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 10:28:53,750 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 7 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) Word has length 128 [2022-03-19 10:28:53,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:28:53,751 INFO L225 Difference]: With dead ends: 385 [2022-03-19 10:28:53,751 INFO L226 Difference]: Without dead ends: 281 [2022-03-19 10:28:53,752 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2022-03-19 10:28:53,752 INFO L912 BasicCegarLoop]: 49 mSDtfsCounter, 16 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:28:53,752 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 270 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:28:53,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-03-19 10:28:53,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 281. [2022-03-19 10:28:53,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 167 states have (on average 1.0838323353293413) internal successors, (181), 169 states have internal predecessors, (181), 83 states have call successors, (83), 31 states have call predecessors, (83), 30 states have return successors, (82), 80 states have call predecessors, (82), 82 states have call successors, (82) [2022-03-19 10:28:53,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 346 transitions. [2022-03-19 10:28:53,871 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 346 transitions. Word has length 128 [2022-03-19 10:28:53,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:28:53,872 INFO L478 AbstractCegarLoop]: Abstraction has 281 states and 346 transitions. [2022-03-19 10:28:53,872 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 7 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2022-03-19 10:28:53,872 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 346 transitions. [2022-03-19 10:28:53,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-03-19 10:28:53,872 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:28:53,872 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:28:53,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-19 10:28:54,088 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-03-19 10:28:54,088 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:28:54,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:28:54,089 INFO L85 PathProgramCache]: Analyzing trace with hash -980158838, now seen corresponding path program 39 times [2022-03-19 10:28:54,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:28:54,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [543565686] [2022-03-19 10:28:54,089 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:28:54,089 INFO L85 PathProgramCache]: Analyzing trace with hash -980158838, now seen corresponding path program 40 times [2022-03-19 10:28:54,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:28:54,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039574853] [2022-03-19 10:28:54,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:28:54,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:28:54,094 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:28:54,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [373557468] [2022-03-19 10:28:54,094 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:28:54,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:28:54,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:28:54,119 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:28:54,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-19 10:28:54,224 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:28:54,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:28:54,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-19 10:28:54,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:28:54,493 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 126 proven. 48 refuted. 0 times theorem prover too weak. 437 trivial. 0 not checked. [2022-03-19 10:28:54,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:28:54,872 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 50 proven. 66 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-03-19 10:28:54,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:28:54,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039574853] [2022-03-19 10:28:54,873 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:28:54,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373557468] [2022-03-19 10:28:54,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373557468] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:28:54,873 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:28:54,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2022-03-19 10:28:54,873 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:28:54,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [543565686] [2022-03-19 10:28:54,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [543565686] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:28:54,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:28:54,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 10:28:54,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059157063] [2022-03-19 10:28:54,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:28:54,875 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 10:28:54,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:28:54,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 10:28:54,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-03-19 10:28:54,875 INFO L87 Difference]: Start difference. First operand 281 states and 346 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 8 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-03-19 10:28:55,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:28:55,140 INFO L93 Difference]: Finished difference Result 409 states and 514 transitions. [2022-03-19 10:28:55,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 10:28:55,141 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 8 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) Word has length 128 [2022-03-19 10:28:55,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:28:55,144 INFO L225 Difference]: With dead ends: 409 [2022-03-19 10:28:55,144 INFO L226 Difference]: Without dead ends: 287 [2022-03-19 10:28:55,145 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2022-03-19 10:28:55,145 INFO L912 BasicCegarLoop]: 49 mSDtfsCounter, 18 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:28:55,145 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 340 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:28:55,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-03-19 10:28:55,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2022-03-19 10:28:55,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 170 states have (on average 1.0823529411764705) internal successors, (184), 172 states have internal predecessors, (184), 86 states have call successors, (86), 31 states have call predecessors, (86), 30 states have return successors, (85), 83 states have call predecessors, (85), 85 states have call successors, (85) [2022-03-19 10:28:55,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 355 transitions. [2022-03-19 10:28:55,283 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 355 transitions. Word has length 128 [2022-03-19 10:28:55,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:28:55,283 INFO L478 AbstractCegarLoop]: Abstraction has 287 states and 355 transitions. [2022-03-19 10:28:55,283 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 8 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-03-19 10:28:55,283 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 355 transitions. [2022-03-19 10:28:55,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-03-19 10:28:55,284 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:28:55,284 INFO L500 BasicCegarLoop]: trace histogram [20, 19, 19, 7, 7, 7, 7, 6, 6, 6, 6, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:28:55,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-19 10:28:55,507 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:28:55,507 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:28:55,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:28:55,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1822030639, now seen corresponding path program 41 times [2022-03-19 10:28:55,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:28:55,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [348199160] [2022-03-19 10:28:55,508 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:28:55,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1822030639, now seen corresponding path program 42 times [2022-03-19 10:28:55,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:28:55,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580265242] [2022-03-19 10:28:55,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:28:55,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:28:55,534 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:28:55,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1891391564] [2022-03-19 10:28:55,534 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 10:28:55,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:28:55,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:28:55,552 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:28:55,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-19 10:28:55,652 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 10:28:55,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:28:55,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 50 conjunts are in the unsatisfiable core [2022-03-19 10:28:55,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:28:55,954 INFO L134 CoverageAnalysis]: Checked inductivity of 854 backedges. 158 proven. 84 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-03-19 10:28:55,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:28:56,214 INFO L134 CoverageAnalysis]: Checked inductivity of 854 backedges. 165 proven. 8 refuted. 0 times theorem prover too weak. 681 trivial. 0 not checked. [2022-03-19 10:28:56,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:28:56,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580265242] [2022-03-19 10:28:56,215 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:28:56,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891391564] [2022-03-19 10:28:56,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891391564] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:28:56,215 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:28:56,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2022-03-19 10:28:56,215 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:28:56,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [348199160] [2022-03-19 10:28:56,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [348199160] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:28:56,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:28:56,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 10:28:56,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090173343] [2022-03-19 10:28:56,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:28:56,216 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 10:28:56,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:28:56,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 10:28:56,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-03-19 10:28:56,216 INFO L87 Difference]: Start difference. First operand 287 states and 355 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) [2022-03-19 10:28:56,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:28:56,526 INFO L93 Difference]: Finished difference Result 287 states and 355 transitions. [2022-03-19 10:28:56,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 10:28:56,526 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) Word has length 146 [2022-03-19 10:28:56,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:28:56,528 INFO L225 Difference]: With dead ends: 287 [2022-03-19 10:28:56,528 INFO L226 Difference]: Without dead ends: 0 [2022-03-19 10:28:56,529 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 279 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-03-19 10:28:56,529 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 13 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 10:28:56,529 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 130 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 10:28:56,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-19 10:28:56,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-19 10:28:56,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-19 10:28:56,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-19 10:28:56,530 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 146 [2022-03-19 10:28:56,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:28:56,530 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-19 10:28:56,530 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) [2022-03-19 10:28:56,530 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-19 10:28:56,530 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-19 10:28:56,532 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-19 10:28:56,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-19 10:28:56,747 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:28:56,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-19 10:29:20,682 WARN L232 SmtUtils]: Spent 12.24s on a formula simplification. DAG size of input: 76 DAG size of output: 46 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-19 10:29:34,502 WARN L232 SmtUtils]: Spent 11.47s on a formula simplification. DAG size of input: 78 DAG size of output: 44 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-19 10:31:18,027 WARN L232 SmtUtils]: Spent 1.73m on a formula simplification. DAG size of input: 391 DAG size of output: 36 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-19 10:32:30,881 WARN L232 SmtUtils]: Spent 1.21m on a formula simplification. DAG size of input: 213 DAG size of output: 75 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-19 10:33:33,027 WARN L232 SmtUtils]: Spent 1.04m on a formula simplification. DAG size of input: 398 DAG size of output: 35 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-19 10:33:57,455 WARN L232 SmtUtils]: Spent 21.60s on a formula simplification. DAG size of input: 82 DAG size of output: 45 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-19 10:35:28,567 WARN L232 SmtUtils]: Spent 1.52m on a formula simplification. DAG size of input: 372 DAG size of output: 35 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-19 10:36:22,408 WARN L232 SmtUtils]: Spent 52.27s on a formula simplification. DAG size of input: 365 DAG size of output: 35 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter)