/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/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-19 04:44:54,516 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 04:44:54,524 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 04:44:54,583 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-19 04:44:54,584 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-19 04:44:54,585 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-19 04:44:54,587 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-19 04:44:54,591 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-19 04:44:54,592 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-19 04:44:54,596 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-19 04:44:54,597 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-19 04:44:54,598 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-19 04:44:54,598 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-19 04:44:54,600 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-19 04:44:54,601 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-19 04:44:54,603 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-19 04:44:54,603 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-19 04:44:54,604 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-19 04:44:54,606 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-19 04:44:54,610 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-19 04:44:54,611 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-19 04:44:54,613 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-19 04:44:54,614 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-19 04:44:54,614 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-19 04:44:54,615 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-19 04:44:54,621 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-19 04:44:54,621 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-19 04:44:54,621 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-19 04:44:54,622 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-19 04:44:54,622 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-19 04:44:54,623 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-19 04:44:54,623 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-19 04:44:54,624 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-19 04:44:54,625 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-19 04:44:54,625 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-19 04:44:54,626 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-19 04:44:54,626 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-19 04:44:54,627 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-19 04:44:54,627 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-19 04:44:54,627 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 04:44:54,627 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 04:44:54,629 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 04:44:54,629 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-03-19 04:44:54,637 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 04:44:54,637 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 04:44:54,639 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 04:44:54,639 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-19 04:44:54,640 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 04:44:54,640 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-19 04:44:54,640 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 04:44:54,640 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 04:44:54,640 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 04:44:54,641 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 04:44:54,641 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-19 04:44:54,641 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 04:44:54,641 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 04:44:54,641 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 04:44:54,641 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 04:44:54,642 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 04:44:54,642 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-19 04:44:54,642 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 04:44:54,642 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 04:44:54,642 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 04:44:54,642 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-19 04:44:54,642 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-19 04:44:54,642 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-19 04:44:54,642 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 04:44:54,643 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-19 04:44:54,643 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 04:44:54,840 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 04:44:54,861 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 04:44:54,863 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 04:44:54,863 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 04:44:54,864 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 04:44:54,864 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound50.c [2022-03-19 04:44:54,906 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/323ff92b7/a7f0e3c6a7c14b1aa219c5d47b76ee5b/FLAG5516b7d8f [2022-03-19 04:44:55,265 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 04:44:55,265 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound50.c [2022-03-19 04:44:55,271 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/323ff92b7/a7f0e3c6a7c14b1aa219c5d47b76ee5b/FLAG5516b7d8f [2022-03-19 04:44:55,689 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/323ff92b7/a7f0e3c6a7c14b1aa219c5d47b76ee5b [2022-03-19 04:44:55,691 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 04:44:55,693 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 04:44:55,695 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 04:44:55,695 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 04:44:55,697 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 04:44:55,697 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 04:44:55" (1/1) ... [2022-03-19 04:44:55,698 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3707b325 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:44:55, skipping insertion in model container [2022-03-19 04:44:55,698 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 04:44:55" (1/1) ... [2022-03-19 04:44:55,702 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 04:44:55,715 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 04:44:55,842 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/egcd3-ll_valuebound50.c[490,503] [2022-03-19 04:44:55,871 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 04:44:55,882 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 04:44:55,893 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/egcd3-ll_valuebound50.c[490,503] [2022-03-19 04:44:55,912 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 04:44:55,921 INFO L208 MainTranslator]: Completed translation [2022-03-19 04:44:55,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:44:55 WrapperNode [2022-03-19 04:44:55,921 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 04:44:55,922 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 04:44:55,922 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 04:44:55,922 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 04:44:55,932 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:44:55" (1/1) ... [2022-03-19 04:44:55,933 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:44:55" (1/1) ... [2022-03-19 04:44:55,939 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:44:55" (1/1) ... [2022-03-19 04:44:55,940 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:44:55" (1/1) ... [2022-03-19 04:44:55,950 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:44:55" (1/1) ... [2022-03-19 04:44:55,955 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:44:55" (1/1) ... [2022-03-19 04:44:55,959 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:44:55" (1/1) ... [2022-03-19 04:44:55,964 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 04:44:55,965 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 04:44:55,965 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 04:44:55,965 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 04:44:55,966 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:44:55" (1/1) ... [2022-03-19 04:44:55,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 04:44:55,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:44:55,988 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 04:44:56,015 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 04:44:56,042 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 04:44:56,042 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 04:44:56,042 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 04:44:56,042 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-19 04:44:56,042 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 04:44:56,042 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 04:44:56,043 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 04:44:56,043 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 04:44:56,043 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 04:44:56,043 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 04:44:56,043 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-19 04:44:56,044 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-19 04:44:56,044 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 04:44:56,045 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 04:44:56,045 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 04:44:56,045 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 04:44:56,045 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 04:44:56,045 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 04:44:56,045 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 04:44:56,045 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 04:44:56,096 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 04:44:56,097 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 04:44:56,215 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 04:44:56,219 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 04:44:56,220 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-03-19 04:44:56,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 04:44:56 BoogieIcfgContainer [2022-03-19 04:44:56,221 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 04:44:56,222 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 04:44:56,222 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 04:44:56,224 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 04:44:56,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 04:44:55" (1/3) ... [2022-03-19 04:44:56,225 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@396a3ec0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 04:44:56, skipping insertion in model container [2022-03-19 04:44:56,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:44:55" (2/3) ... [2022-03-19 04:44:56,225 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@396a3ec0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 04:44:56, skipping insertion in model container [2022-03-19 04:44:56,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 04:44:56" (3/3) ... [2022-03-19 04:44:56,231 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound50.c [2022-03-19 04:44:56,235 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-19 04:44:56,235 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 04:44:56,287 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 04:44:56,292 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 04:44:56,292 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 04:44:56,310 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-19 04:44:56,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-19 04:44:56,316 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:44:56,317 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 04:44:56,317 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:44:56,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:44:56,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1237885594, now seen corresponding path program 1 times [2022-03-19 04:44:56,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:44:56,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [484014593] [2022-03-19 04:44:56,341 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:44:56,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1237885594, now seen corresponding path program 2 times [2022-03-19 04:44:56,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:44:56,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154025247] [2022-03-19 04:44:56,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:44:56,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:44:56,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 04:44:56,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 04:44:56,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 04:44:56,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 04:44:56,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 04:44:56,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 04:44:56,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 04:44:56,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 04:44:56,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 04:44:56,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-19 04:44:56,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 04:44:56,536 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 04:44:56,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:44:56,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154025247] [2022-03-19 04:44:56,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154025247] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:44:56,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:44:56,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 04:44:56,539 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:44:56,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [484014593] [2022-03-19 04:44:56,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [484014593] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:44:56,539 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:44:56,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 04:44:56,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055918428] [2022-03-19 04:44:56,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:44:56,543 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-19 04:44:56,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:44:56,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-19 04:44:56,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 04:44:56,565 INFO L87 Difference]: Start difference. First operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) 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 04:44:56,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:44:56,643 INFO L93 Difference]: Finished difference Result 73 states and 115 transitions. [2022-03-19 04:44:56,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-19 04:44:56,645 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 04:44:56,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:44:56,650 INFO L225 Difference]: With dead ends: 73 [2022-03-19 04:44:56,650 INFO L226 Difference]: Without dead ends: 35 [2022-03-19 04:44:56,652 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 04:44:56,655 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 24 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:44:56,655 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 43 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:44:56,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-19 04:44:56,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-03-19 04:44:56,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-19 04:44:56,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2022-03-19 04:44:56,705 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 33 [2022-03-19 04:44:56,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:44:56,705 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2022-03-19 04:44:56,706 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 04:44:56,706 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2022-03-19 04:44:56,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-19 04:44:56,707 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:44:56,707 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, 1] [2022-03-19 04:44:56,708 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 04:44:56,708 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:44:56,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:44:56,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1569470122, now seen corresponding path program 1 times [2022-03-19 04:44:56,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:44:56,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1267852549] [2022-03-19 04:44:56,712 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:44:56,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1569470122, now seen corresponding path program 2 times [2022-03-19 04:44:56,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:44:56,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306044663] [2022-03-19 04:44:56,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:44:56,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:44:56,750 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:44:56,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [279961485] [2022-03-19 04:44:56,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:44:56,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:44:56,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:44:56,752 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 04:44:56,753 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 04:44:56,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-19 04:44:56,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:44:56,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-19 04:44:56,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:44:57,027 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 04:44:57,028 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 04:44:57,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:44:57,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306044663] [2022-03-19 04:44:57,028 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:44:57,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279961485] [2022-03-19 04:44:57,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279961485] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:44:57,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:44:57,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 04:44:57,033 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:44:57,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1267852549] [2022-03-19 04:44:57,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1267852549] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:44:57,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:44:57,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 04:44:57,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196793113] [2022-03-19 04:44:57,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:44:57,043 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 04:44:57,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:44:57,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 04:44:57,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-19 04:44:57,045 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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 04:44:57,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:44:57,140 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2022-03-19 04:44:57,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 04:44:57,140 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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 34 [2022-03-19 04:44:57,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:44:57,143 INFO L225 Difference]: With dead ends: 54 [2022-03-19 04:44:57,143 INFO L226 Difference]: Without dead ends: 51 [2022-03-19 04:44:57,144 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-19 04:44:57,145 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 14 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 04:44:57,146 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 197 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 04:44:57,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-19 04:44:57,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-03-19 04:44:57,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 30 states have (on average 1.2) internal successors, (36), 31 states have internal predecessors, (36), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-19 04:44:57,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2022-03-19 04:44:57,157 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 34 [2022-03-19 04:44:57,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:44:57,157 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2022-03-19 04:44:57,157 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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 04:44:57,157 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2022-03-19 04:44:57,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-19 04:44:57,158 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:44:57,158 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, 1] [2022-03-19 04:44:57,183 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 04:44:57,371 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 04:44:57,372 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:44:57,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:44:57,372 INFO L85 PathProgramCache]: Analyzing trace with hash 584996456, now seen corresponding path program 1 times [2022-03-19 04:44:57,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:44:57,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1797123477] [2022-03-19 04:44:57,373 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:44:57,373 INFO L85 PathProgramCache]: Analyzing trace with hash 584996456, now seen corresponding path program 2 times [2022-03-19 04:44:57,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:44:57,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267364382] [2022-03-19 04:44:57,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:44:57,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:44:57,384 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:44:57,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1491781499] [2022-03-19 04:44:57,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:44:57,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:44:57,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:44:57,386 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 04:44:57,412 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 04:44:57,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:44:57,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:44:57,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 04:44:57,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:44:57,544 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-19 04:44:57,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:44:57,702 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-19 04:44:57,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:44:57,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267364382] [2022-03-19 04:44:57,703 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:44:57,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491781499] [2022-03-19 04:44:57,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491781499] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:44:57,703 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:44:57,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-19 04:44:57,703 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:44:57,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1797123477] [2022-03-19 04:44:57,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1797123477] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:44:57,704 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:44:57,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 04:44:57,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352499950] [2022-03-19 04:44:57,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:44:57,704 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 04:44:57,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:44:57,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 04:44:57,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-19 04:44:57,705 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 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 04:44:57,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:44:57,879 INFO L93 Difference]: Finished difference Result 103 states and 143 transitions. [2022-03-19 04:44:57,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 04:44:57,880 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 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 39 [2022-03-19 04:44:57,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:44:57,881 INFO L225 Difference]: With dead ends: 103 [2022-03-19 04:44:57,881 INFO L226 Difference]: Without dead ends: 96 [2022-03-19 04:44:57,882 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-19 04:44:57,882 INFO L912 BasicCegarLoop]: 51 mSDtfsCounter, 58 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:44:57,883 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 288 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:44:57,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-03-19 04:44:57,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2022-03-19 04:44:57,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 48 states have internal predecessors, (59), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-19 04:44:57,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 95 transitions. [2022-03-19 04:44:57,907 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 95 transitions. Word has length 39 [2022-03-19 04:44:57,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:44:57,908 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 95 transitions. [2022-03-19 04:44:57,908 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 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 04:44:57,908 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 95 transitions. [2022-03-19 04:44:57,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-19 04:44:57,909 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:44:57,909 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:44:57,928 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 04:44:58,118 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 04:44:58,118 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:44:58,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:44:58,119 INFO L85 PathProgramCache]: Analyzing trace with hash -974923140, now seen corresponding path program 1 times [2022-03-19 04:44:58,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:44:58,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1333050875] [2022-03-19 04:44:58,119 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:44:58,119 INFO L85 PathProgramCache]: Analyzing trace with hash -974923140, now seen corresponding path program 2 times [2022-03-19 04:44:58,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:44:58,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786497507] [2022-03-19 04:44:58,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:44:58,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:44:58,130 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:44:58,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1486827557] [2022-03-19 04:44:58,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:44:58,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:44:58,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:44:58,133 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 04:44:58,135 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 04:44:58,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:44:58,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:44:58,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-19 04:44:58,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:44:58,472 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 04:44:58,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:44:58,667 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 04:44:58,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:44:58,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786497507] [2022-03-19 04:44:58,668 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:44:58,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486827557] [2022-03-19 04:44:58,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486827557] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:44:58,668 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:44:58,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 18 [2022-03-19 04:44:58,668 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:44:58,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1333050875] [2022-03-19 04:44:58,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1333050875] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:44:58,669 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:44:58,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 04:44:58,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278818197] [2022-03-19 04:44:58,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:44:58,669 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 04:44:58,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:44:58,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 04:44:58,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-03-19 04:44:58,670 INFO L87 Difference]: Start difference. First operand 71 states and 95 transitions. Second operand has 13 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-19 04:44:58,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:44:58,980 INFO L93 Difference]: Finished difference Result 112 states and 151 transitions. [2022-03-19 04:44:58,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 04:44:58,980 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 42 [2022-03-19 04:44:58,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:44:58,981 INFO L225 Difference]: With dead ends: 112 [2022-03-19 04:44:58,982 INFO L226 Difference]: Without dead ends: 110 [2022-03-19 04:44:58,982 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2022-03-19 04:44:58,983 INFO L912 BasicCegarLoop]: 52 mSDtfsCounter, 63 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 04:44:58,983 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 389 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 04:44:58,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-03-19 04:44:59,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 93. [2022-03-19 04:44:59,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 63 states have (on average 1.2380952380952381) internal successors, (78), 64 states have internal predecessors, (78), 23 states have call successors, (23), 7 states have call predecessors, (23), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-03-19 04:44:59,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 122 transitions. [2022-03-19 04:44:59,002 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 122 transitions. Word has length 42 [2022-03-19 04:44:59,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:44:59,004 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 122 transitions. [2022-03-19 04:44:59,004 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-19 04:44:59,004 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 122 transitions. [2022-03-19 04:44:59,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-19 04:44:59,007 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:44:59,007 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, 1, 1, 1, 1] [2022-03-19 04:44:59,026 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 04:44:59,223 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 04:44:59,224 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:44:59,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:44:59,224 INFO L85 PathProgramCache]: Analyzing trace with hash 81990170, now seen corresponding path program 1 times [2022-03-19 04:44:59,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:44:59,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1396793185] [2022-03-19 04:44:59,225 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:44:59,225 INFO L85 PathProgramCache]: Analyzing trace with hash 81990170, now seen corresponding path program 2 times [2022-03-19 04:44:59,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:44:59,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532454977] [2022-03-19 04:44:59,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:44:59,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:44:59,233 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:44:59,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1299112653] [2022-03-19 04:44:59,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:44:59,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:44:59,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:44:59,240 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 04:44:59,242 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 04:44:59,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:44:59,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:44:59,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-19 04:44:59,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:44:59,407 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-19 04:44:59,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:44:59,489 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 04:44:59,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:44:59,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532454977] [2022-03-19 04:44:59,491 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:44:59,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299112653] [2022-03-19 04:44:59,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299112653] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-19 04:44:59,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 04:44:59,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-03-19 04:44:59,492 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:44:59,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1396793185] [2022-03-19 04:44:59,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1396793185] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:44:59,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:44:59,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 04:44:59,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228711422] [2022-03-19 04:44:59,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:44:59,493 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 04:44:59,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:44:59,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 04:44:59,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-03-19 04:44:59,494 INFO L87 Difference]: Start difference. First operand 93 states and 122 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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 04:44:59,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:44:59,538 INFO L93 Difference]: Finished difference Result 130 states and 179 transitions. [2022-03-19 04:44:59,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 04:44:59,539 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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 47 [2022-03-19 04:44:59,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:44:59,541 INFO L225 Difference]: With dead ends: 130 [2022-03-19 04:44:59,541 INFO L226 Difference]: Without dead ends: 128 [2022-03-19 04:44:59,541 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-19 04:44:59,544 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 8 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 04:44:59,544 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 150 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 04:44:59,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-03-19 04:44:59,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 123. [2022-03-19 04:44:59,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 76 states have (on average 1.263157894736842) internal successors, (96), 77 states have internal predecessors, (96), 39 states have call successors, (39), 8 states have call predecessors, (39), 7 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-03-19 04:44:59,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 172 transitions. [2022-03-19 04:44:59,575 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 172 transitions. Word has length 47 [2022-03-19 04:44:59,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:44:59,575 INFO L478 AbstractCegarLoop]: Abstraction has 123 states and 172 transitions. [2022-03-19 04:44:59,575 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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 04:44:59,576 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 172 transitions. [2022-03-19 04:44:59,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-19 04:44:59,576 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:44:59,576 INFO L500 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2022-03-19 04:44:59,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-19 04:44:59,793 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 04:44:59,793 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:44:59,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:44:59,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1524769911, now seen corresponding path program 1 times [2022-03-19 04:44:59,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:44:59,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [46458232] [2022-03-19 04:44:59,794 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:44:59,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1524769911, now seen corresponding path program 2 times [2022-03-19 04:44:59,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:44:59,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367170745] [2022-03-19 04:44:59,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:44:59,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:44:59,803 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:44:59,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1106265776] [2022-03-19 04:44:59,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:44:59,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:44:59,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:44:59,807 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 04:44:59,815 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 04:44:59,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:44:59,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:44:59,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-19 04:44:59,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:45:00,067 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 04:45:00,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:45:00,252 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 04:45:00,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:45:00,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367170745] [2022-03-19 04:45:00,252 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:45:00,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106265776] [2022-03-19 04:45:00,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106265776] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:45:00,252 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:45:00,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 14 [2022-03-19 04:45:00,253 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:45:00,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [46458232] [2022-03-19 04:45:00,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [46458232] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:45:00,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:45:00,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 04:45:00,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066407977] [2022-03-19 04:45:00,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:45:00,253 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 04:45:00,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:45:00,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 04:45:00,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-03-19 04:45:00,254 INFO L87 Difference]: Start difference. First operand 123 states and 172 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-19 04:45:00,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:45:00,449 INFO L93 Difference]: Finished difference Result 137 states and 184 transitions. [2022-03-19 04:45:00,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 04:45:00,450 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 47 [2022-03-19 04:45:00,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:45:00,451 INFO L225 Difference]: With dead ends: 137 [2022-03-19 04:45:00,451 INFO L226 Difference]: Without dead ends: 135 [2022-03-19 04:45:00,452 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-03-19 04:45:00,452 INFO L912 BasicCegarLoop]: 47 mSDtfsCounter, 87 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:45:00,452 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 254 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:45:00,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-03-19 04:45:00,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 131. [2022-03-19 04:45:00,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 82 states have (on average 1.2439024390243902) internal successors, (102), 83 states have internal predecessors, (102), 39 states have call successors, (39), 10 states have call predecessors, (39), 9 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-03-19 04:45:00,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 178 transitions. [2022-03-19 04:45:00,467 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 178 transitions. Word has length 47 [2022-03-19 04:45:00,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:45:00,468 INFO L478 AbstractCegarLoop]: Abstraction has 131 states and 178 transitions. [2022-03-19 04:45:00,468 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-19 04:45:00,468 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 178 transitions. [2022-03-19 04:45:00,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-19 04:45:00,469 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:45:00,469 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1] [2022-03-19 04:45:00,491 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 04:45:00,683 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 04:45:00,683 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:45:00,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:45:00,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1836145722, now seen corresponding path program 3 times [2022-03-19 04:45:00,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:45:00,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [736766985] [2022-03-19 04:45:00,684 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:45:00,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1836145722, now seen corresponding path program 4 times [2022-03-19 04:45:00,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:45:00,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133276699] [2022-03-19 04:45:00,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:45:00,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:45:00,693 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:45:00,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [717038558] [2022-03-19 04:45:00,693 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:45:00,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:45:00,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:45:00,696 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 04:45:00,696 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 04:45:00,731 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:45:00,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:45:00,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-19 04:45:00,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:45:00,787 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 04:45:00,787 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 04:45:00,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:45:00,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133276699] [2022-03-19 04:45:00,787 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:45:00,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717038558] [2022-03-19 04:45:00,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717038558] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:45:00,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:45:00,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 04:45:00,788 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:45:00,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [736766985] [2022-03-19 04:45:00,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [736766985] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:45:00,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:45:00,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 04:45:00,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981193042] [2022-03-19 04:45:00,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:45:00,789 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 04:45:00,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:45:00,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 04:45:00,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 04:45:00,790 INFO L87 Difference]: Start difference. First operand 131 states and 178 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 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 04:45:00,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:45:00,846 INFO L93 Difference]: Finished difference Result 170 states and 230 transitions. [2022-03-19 04:45:00,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 04:45:00,847 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 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 47 [2022-03-19 04:45:00,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:45:00,849 INFO L225 Difference]: With dead ends: 170 [2022-03-19 04:45:00,849 INFO L226 Difference]: Without dead ends: 114 [2022-03-19 04:45:00,852 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-19 04:45:00,852 INFO L912 BasicCegarLoop]: 57 mSDtfsCounter, 18 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 04:45:00,852 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 180 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 04:45:00,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-03-19 04:45:00,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 106. [2022-03-19 04:45:00,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 65 states have (on average 1.1846153846153846) internal successors, (77), 66 states have internal predecessors, (77), 31 states have call successors, (31), 10 states have call predecessors, (31), 9 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-03-19 04:45:00,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 137 transitions. [2022-03-19 04:45:00,871 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 137 transitions. Word has length 47 [2022-03-19 04:45:00,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:45:00,871 INFO L478 AbstractCegarLoop]: Abstraction has 106 states and 137 transitions. [2022-03-19 04:45:00,871 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 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 04:45:00,871 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 137 transitions. [2022-03-19 04:45:00,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-19 04:45:00,872 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:45:00,872 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, 1, 1, 1] [2022-03-19 04:45:00,891 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 04:45:01,089 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 04:45:01,090 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:45:01,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:45:01,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1952108775, now seen corresponding path program 1 times [2022-03-19 04:45:01,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:45:01,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1393417239] [2022-03-19 04:45:01,091 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:45:01,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1952108775, now seen corresponding path program 2 times [2022-03-19 04:45:01,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:45:01,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597421909] [2022-03-19 04:45:01,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:45:01,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:45:01,099 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:45:01,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1935372057] [2022-03-19 04:45:01,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:45:01,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:45:01,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:45:01,101 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 04:45:01,102 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 04:45:01,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:45:01,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:45:01,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 04:45:01,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:45:01,224 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 04:45:01,225 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 04:45:01,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:45:01,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597421909] [2022-03-19 04:45:01,225 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:45:01,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935372057] [2022-03-19 04:45:01,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935372057] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:45:01,225 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:45:01,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 04:45:01,225 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:45:01,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1393417239] [2022-03-19 04:45:01,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1393417239] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:45:01,226 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:45:01,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 04:45:01,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64881245] [2022-03-19 04:45:01,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:45:01,226 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 04:45:01,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:45:01,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 04:45:01,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 04:45:01,227 INFO L87 Difference]: Start difference. First operand 106 states and 137 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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 04:45:01,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:45:01,282 INFO L93 Difference]: Finished difference Result 158 states and 221 transitions. [2022-03-19 04:45:01,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 04:45:01,283 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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 52 [2022-03-19 04:45:01,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:45:01,284 INFO L225 Difference]: With dead ends: 158 [2022-03-19 04:45:01,284 INFO L226 Difference]: Without dead ends: 156 [2022-03-19 04:45:01,285 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 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 04:45:01,285 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 9 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 04:45:01,285 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 162 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 04:45:01,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-03-19 04:45:01,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 140. [2022-03-19 04:45:01,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 74 states have (on average 1.162162162162162) internal successors, (86), 81 states have internal predecessors, (86), 55 states have call successors, (55), 11 states have call predecessors, (55), 10 states have return successors, (53), 47 states have call predecessors, (53), 53 states have call successors, (53) [2022-03-19 04:45:01,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 194 transitions. [2022-03-19 04:45:01,302 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 194 transitions. Word has length 52 [2022-03-19 04:45:01,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:45:01,302 INFO L478 AbstractCegarLoop]: Abstraction has 140 states and 194 transitions. [2022-03-19 04:45:01,302 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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 04:45:01,302 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 194 transitions. [2022-03-19 04:45:01,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-19 04:45:01,303 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:45:01,303 INFO L500 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:45:01,453 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-19 04:45:01,519 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 04:45:01,519 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:45:01,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:45:01,520 INFO L85 PathProgramCache]: Analyzing trace with hash 188363668, now seen corresponding path program 1 times [2022-03-19 04:45:01,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:45:01,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [262278675] [2022-03-19 04:45:01,520 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:45:01,521 INFO L85 PathProgramCache]: Analyzing trace with hash 188363668, now seen corresponding path program 2 times [2022-03-19 04:45:01,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:45:01,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813634278] [2022-03-19 04:45:01,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:45:01,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:45:01,531 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:45:01,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1297996175] [2022-03-19 04:45:01,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:45:01,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:45:01,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:45:01,532 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 04:45:01,534 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 04:45:01,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:45:01,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:45:01,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-19 04:45:01,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:45:02,031 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-19 04:45:02,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:45:02,713 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-19 04:45:02,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:45:02,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813634278] [2022-03-19 04:45:02,714 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:45:02,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297996175] [2022-03-19 04:45:02,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297996175] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:45:02,714 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:45:02,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2022-03-19 04:45:02,716 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:45:02,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [262278675] [2022-03-19 04:45:02,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [262278675] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:45:02,716 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:45:02,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 04:45:02,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382168158] [2022-03-19 04:45:02,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:45:02,717 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 04:45:02,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:45:02,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 04:45:02,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-03-19 04:45:02,718 INFO L87 Difference]: Start difference. First operand 140 states and 194 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-19 04:45:03,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:45:03,105 INFO L93 Difference]: Finished difference Result 200 states and 283 transitions. [2022-03-19 04:45:03,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 04:45:03,107 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 64 [2022-03-19 04:45:03,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:45:03,109 INFO L225 Difference]: With dead ends: 200 [2022-03-19 04:45:03,109 INFO L226 Difference]: Without dead ends: 197 [2022-03-19 04:45:03,110 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2022-03-19 04:45:03,110 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 48 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 04:45:03,111 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 423 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 04:45:03,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-03-19 04:45:03,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 193. [2022-03-19 04:45:03,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 101 states have (on average 1.1782178217821782) internal successors, (119), 110 states have internal predecessors, (119), 79 states have call successors, (79), 13 states have call predecessors, (79), 12 states have return successors, (77), 69 states have call predecessors, (77), 77 states have call successors, (77) [2022-03-19 04:45:03,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 275 transitions. [2022-03-19 04:45:03,139 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 275 transitions. Word has length 64 [2022-03-19 04:45:03,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:45:03,139 INFO L478 AbstractCegarLoop]: Abstraction has 193 states and 275 transitions. [2022-03-19 04:45:03,139 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-19 04:45:03,139 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 275 transitions. [2022-03-19 04:45:03,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-19 04:45:03,140 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:45:03,140 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:45:03,159 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 04:45:03,357 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 04:45:03,358 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:45:03,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:45:03,358 INFO L85 PathProgramCache]: Analyzing trace with hash -368004398, now seen corresponding path program 3 times [2022-03-19 04:45:03,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:45:03,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1847685884] [2022-03-19 04:45:03,359 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:45:03,359 INFO L85 PathProgramCache]: Analyzing trace with hash -368004398, now seen corresponding path program 4 times [2022-03-19 04:45:03,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:45:03,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509879316] [2022-03-19 04:45:03,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:45:03,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:45:03,366 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:45:03,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1428735428] [2022-03-19 04:45:03,366 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:45:03,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:45:03,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:45:03,367 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 04:45:03,368 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 04:45:03,401 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:45:03,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:45:03,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-19 04:45:03,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:45:03,508 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-19 04:45:03,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:45:03,621 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-19 04:45:03,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:45:03,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509879316] [2022-03-19 04:45:03,621 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:45:03,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428735428] [2022-03-19 04:45:03,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428735428] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:45:03,622 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:45:03,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-03-19 04:45:03,622 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:45:03,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1847685884] [2022-03-19 04:45:03,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1847685884] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:45:03,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:45:03,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 04:45:03,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850503055] [2022-03-19 04:45:03,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:45:03,623 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 04:45:03,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:45:03,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 04:45:03,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-03-19 04:45:03,623 INFO L87 Difference]: Start difference. First operand 193 states and 275 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-19 04:45:03,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:45:03,890 INFO L93 Difference]: Finished difference Result 288 states and 424 transitions. [2022-03-19 04:45:03,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 04:45:03,891 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 69 [2022-03-19 04:45:03,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:45:03,893 INFO L225 Difference]: With dead ends: 288 [2022-03-19 04:45:03,893 INFO L226 Difference]: Without dead ends: 281 [2022-03-19 04:45:03,893 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 134 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2022-03-19 04:45:03,894 INFO L912 BasicCegarLoop]: 87 mSDtfsCounter, 46 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:45:03,894 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 394 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:45:03,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-03-19 04:45:03,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 208. [2022-03-19 04:45:03,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 116 states have (on average 1.206896551724138) internal successors, (140), 122 states have internal predecessors, (140), 79 states have call successors, (79), 13 states have call predecessors, (79), 12 states have return successors, (77), 72 states have call predecessors, (77), 77 states have call successors, (77) [2022-03-19 04:45:03,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 296 transitions. [2022-03-19 04:45:03,957 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 296 transitions. Word has length 69 [2022-03-19 04:45:03,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:45:03,957 INFO L478 AbstractCegarLoop]: Abstraction has 208 states and 296 transitions. [2022-03-19 04:45:03,957 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-19 04:45:03,957 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 296 transitions. [2022-03-19 04:45:03,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-19 04:45:03,958 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:45:03,958 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:45:03,982 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 04:45:04,160 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 04:45:04,160 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:45:04,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:45:04,161 INFO L85 PathProgramCache]: Analyzing trace with hash -298771846, now seen corresponding path program 1 times [2022-03-19 04:45:04,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:45:04,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1333503903] [2022-03-19 04:45:04,161 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:45:04,161 INFO L85 PathProgramCache]: Analyzing trace with hash -298771846, now seen corresponding path program 2 times [2022-03-19 04:45:04,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:45:04,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581265121] [2022-03-19 04:45:04,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:45:04,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:45:04,168 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:45:04,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [338572787] [2022-03-19 04:45:04,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:45:04,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:45:04,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:45:04,170 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 04:45:04,193 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 04:45:04,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:45:04,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:45:04,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-19 04:45:04,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:45:04,330 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-03-19 04:45:04,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:45:04,448 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-03-19 04:45:04,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:45:04,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581265121] [2022-03-19 04:45:04,448 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:45:04,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338572787] [2022-03-19 04:45:04,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338572787] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-19 04:45:04,448 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 04:45:04,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-03-19 04:45:04,449 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:45:04,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1333503903] [2022-03-19 04:45:04,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1333503903] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:45:04,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:45:04,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 04:45:04,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518165087] [2022-03-19 04:45:04,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:45:04,449 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 04:45:04,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:45:04,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 04:45:04,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-19 04:45:04,450 INFO L87 Difference]: Start difference. First operand 208 states and 296 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-19 04:45:04,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:45:04,497 INFO L93 Difference]: Finished difference Result 214 states and 301 transitions. [2022-03-19 04:45:04,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 04:45:04,498 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 74 [2022-03-19 04:45:04,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:45:04,499 INFO L225 Difference]: With dead ends: 214 [2022-03-19 04:45:04,500 INFO L226 Difference]: Without dead ends: 212 [2022-03-19 04:45:04,500 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 140 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-19 04:45:04,500 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 9 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 04:45:04,500 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 145 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 04:45:04,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-03-19 04:45:04,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2022-03-19 04:45:04,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 119 states have (on average 1.2016806722689075) internal successors, (143), 125 states have internal predecessors, (143), 79 states have call successors, (79), 14 states have call predecessors, (79), 13 states have return successors, (77), 72 states have call predecessors, (77), 77 states have call successors, (77) [2022-03-19 04:45:04,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 299 transitions. [2022-03-19 04:45:04,528 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 299 transitions. Word has length 74 [2022-03-19 04:45:04,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:45:04,528 INFO L478 AbstractCegarLoop]: Abstraction has 212 states and 299 transitions. [2022-03-19 04:45:04,528 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-19 04:45:04,528 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 299 transitions. [2022-03-19 04:45:04,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-03-19 04:45:04,529 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:45:04,529 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:45:04,553 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 04:45:04,743 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 04:45:04,743 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:45:04,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:45:04,744 INFO L85 PathProgramCache]: Analyzing trace with hash -2089538094, now seen corresponding path program 1 times [2022-03-19 04:45:04,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:45:04,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1833960750] [2022-03-19 04:45:04,744 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:45:04,744 INFO L85 PathProgramCache]: Analyzing trace with hash -2089538094, now seen corresponding path program 2 times [2022-03-19 04:45:04,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:45:04,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539301148] [2022-03-19 04:45:04,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:45:04,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:45:04,751 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:45:04,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [779767859] [2022-03-19 04:45:04,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:45:04,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:45:04,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:45:04,753 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 04:45:04,754 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 04:45:04,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:45:04,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:45:04,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-19 04:45:04,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:45:04,897 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-03-19 04:45:04,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:45:05,053 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-03-19 04:45:05,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:45:05,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539301148] [2022-03-19 04:45:05,053 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:45:05,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779767859] [2022-03-19 04:45:05,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779767859] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:45:05,054 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:45:05,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-19 04:45:05,054 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:45:05,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1833960750] [2022-03-19 04:45:05,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1833960750] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:45:05,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:45:05,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 04:45:05,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009772119] [2022-03-19 04:45:05,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:45:05,055 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 04:45:05,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:45:05,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 04:45:05,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-19 04:45:05,055 INFO L87 Difference]: Start difference. First operand 212 states and 299 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-19 04:45:05,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:45:05,253 INFO L93 Difference]: Finished difference Result 226 states and 310 transitions. [2022-03-19 04:45:05,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 04:45:05,254 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 72 [2022-03-19 04:45:05,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:45:05,255 INFO L225 Difference]: With dead ends: 226 [2022-03-19 04:45:05,255 INFO L226 Difference]: Without dead ends: 224 [2022-03-19 04:45:05,255 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-19 04:45:05,256 INFO L912 BasicCegarLoop]: 33 mSDtfsCounter, 21 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:45:05,256 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 196 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:45:05,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-03-19 04:45:05,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 224. [2022-03-19 04:45:05,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 128 states have (on average 1.1875) internal successors, (152), 134 states have internal predecessors, (152), 79 states have call successors, (79), 17 states have call predecessors, (79), 16 states have return successors, (77), 72 states have call predecessors, (77), 77 states have call successors, (77) [2022-03-19 04:45:05,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 308 transitions. [2022-03-19 04:45:05,287 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 308 transitions. Word has length 72 [2022-03-19 04:45:05,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:45:05,287 INFO L478 AbstractCegarLoop]: Abstraction has 224 states and 308 transitions. [2022-03-19 04:45:05,287 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-19 04:45:05,287 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 308 transitions. [2022-03-19 04:45:05,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-19 04:45:05,288 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:45:05,288 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:45:05,307 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 04:45:05,503 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 04:45:05,503 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:45:05,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:45:05,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1984914564, now seen corresponding path program 3 times [2022-03-19 04:45:05,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:45:05,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2001144142] [2022-03-19 04:45:05,504 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:45:05,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1984914564, now seen corresponding path program 4 times [2022-03-19 04:45:05,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:45:05,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250638891] [2022-03-19 04:45:05,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:45:05,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:45:05,511 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:45:05,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [60483970] [2022-03-19 04:45:05,511 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:45:05,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:45:05,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:45:05,515 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 04:45:05,517 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 04:45:05,553 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:45:05,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:45:05,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 04:45:05,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:45:05,659 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-19 04:45:05,659 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 04:45:05,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:45:05,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250638891] [2022-03-19 04:45:05,660 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:45:05,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60483970] [2022-03-19 04:45:05,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60483970] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:45:05,660 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:45:05,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 04:45:05,660 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:45:05,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2001144142] [2022-03-19 04:45:05,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2001144142] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:45:05,660 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:45:05,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 04:45:05,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988461930] [2022-03-19 04:45:05,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:45:05,661 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 04:45:05,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:45:05,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 04:45:05,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-19 04:45:05,661 INFO L87 Difference]: Start difference. First operand 224 states and 308 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-03-19 04:45:05,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:45:05,731 INFO L93 Difference]: Finished difference Result 367 states and 500 transitions. [2022-03-19 04:45:05,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 04:45:05,732 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 77 [2022-03-19 04:45:05,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:45:05,733 INFO L225 Difference]: With dead ends: 367 [2022-03-19 04:45:05,733 INFO L226 Difference]: Without dead ends: 230 [2022-03-19 04:45:05,734 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-19 04:45:05,734 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 3 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 04:45:05,734 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 148 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 04:45:05,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-03-19 04:45:05,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 214. [2022-03-19 04:45:05,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 126 states have (on average 1.1825396825396826) internal successors, (149), 127 states have internal predecessors, (149), 71 states have call successors, (71), 17 states have call predecessors, (71), 16 states have return successors, (69), 69 states have call predecessors, (69), 69 states have call successors, (69) [2022-03-19 04:45:05,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 289 transitions. [2022-03-19 04:45:05,772 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 289 transitions. Word has length 77 [2022-03-19 04:45:05,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:45:05,772 INFO L478 AbstractCegarLoop]: Abstraction has 214 states and 289 transitions. [2022-03-19 04:45:05,772 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-03-19 04:45:05,772 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 289 transitions. [2022-03-19 04:45:05,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-19 04:45:05,772 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:45:05,773 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:45:05,797 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 04:45:05,987 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 04:45:05,987 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:45:05,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:45:05,988 INFO L85 PathProgramCache]: Analyzing trace with hash -867272991, now seen corresponding path program 5 times [2022-03-19 04:45:05,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:45:05,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1205580387] [2022-03-19 04:45:05,988 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:45:05,988 INFO L85 PathProgramCache]: Analyzing trace with hash -867272991, now seen corresponding path program 6 times [2022-03-19 04:45:05,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:45:05,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867770577] [2022-03-19 04:45:05,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:45:05,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:45:05,995 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:45:05,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1335548501] [2022-03-19 04:45:05,996 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:45:05,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:45:05,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:45:05,997 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 04:45:06,007 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 04:45:06,069 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 04:45:06,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:45:06,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 65 conjunts are in the unsatisfiable core [2022-03-19 04:45:06,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:45:06,712 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 12 proven. 32 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-19 04:45:06,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:45:07,159 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:45:07,228 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 18 proven. 26 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-19 04:45:07,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:45:07,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867770577] [2022-03-19 04:45:07,229 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:45:07,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335548501] [2022-03-19 04:45:07,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335548501] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:45:07,229 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:45:07,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 24 [2022-03-19 04:45:07,230 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:45:07,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1205580387] [2022-03-19 04:45:07,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1205580387] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:45:07,230 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:45:07,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 04:45:07,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499187870] [2022-03-19 04:45:07,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:45:07,231 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 04:45:07,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:45:07,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 04:45:07,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2022-03-19 04:45:07,232 INFO L87 Difference]: Start difference. First operand 214 states and 289 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-03-19 04:45:07,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:45:07,768 INFO L93 Difference]: Finished difference Result 285 states and 377 transitions. [2022-03-19 04:45:07,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 04:45:07,768 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 77 [2022-03-19 04:45:07,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:45:07,770 INFO L225 Difference]: With dead ends: 285 [2022-03-19 04:45:07,770 INFO L226 Difference]: Without dead ends: 283 [2022-03-19 04:45:07,770 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2022-03-19 04:45:07,770 INFO L912 BasicCegarLoop]: 50 mSDtfsCounter, 59 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 04:45:07,771 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 536 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 658 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 04:45:07,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-03-19 04:45:07,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 265. [2022-03-19 04:45:07,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 157 states have (on average 1.178343949044586) internal successors, (185), 158 states have internal predecessors, (185), 87 states have call successors, (87), 21 states have call predecessors, (87), 20 states have return successors, (85), 85 states have call predecessors, (85), 85 states have call successors, (85) [2022-03-19 04:45:07,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 357 transitions. [2022-03-19 04:45:07,818 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 357 transitions. Word has length 77 [2022-03-19 04:45:07,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:45:07,818 INFO L478 AbstractCegarLoop]: Abstraction has 265 states and 357 transitions. [2022-03-19 04:45:07,818 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-03-19 04:45:07,818 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 357 transitions. [2022-03-19 04:45:07,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-19 04:45:07,820 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:45:07,820 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:45:07,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-19 04:45:08,031 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 04:45:08,031 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:45:08,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:45:08,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1679616651, now seen corresponding path program 1 times [2022-03-19 04:45:08,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:45:08,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1807121843] [2022-03-19 04:45:08,032 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:45:08,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1679616651, now seen corresponding path program 2 times [2022-03-19 04:45:08,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:45:08,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399677264] [2022-03-19 04:45:08,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:45:08,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:45:08,038 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:45:08,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [64556775] [2022-03-19 04:45:08,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:45:08,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:45:08,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:45:08,043 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 04:45:08,079 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 04:45:08,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:45:08,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:45:08,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-19 04:45:08,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:45:08,711 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 38 proven. 24 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-03-19 04:45:08,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:45:10,437 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 40 proven. 22 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-03-19 04:45:10,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:45:10,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399677264] [2022-03-19 04:45:10,438 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:45:10,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64556775] [2022-03-19 04:45:10,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64556775] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:45:10,438 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:45:10,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2022-03-19 04:45:10,438 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:45:10,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1807121843] [2022-03-19 04:45:10,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1807121843] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:45:10,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:45:10,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 04:45:10,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572718696] [2022-03-19 04:45:10,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:45:10,439 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 04:45:10,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:45:10,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 04:45:10,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-03-19 04:45:10,440 INFO L87 Difference]: Start difference. First operand 265 states and 357 transitions. Second operand has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-19 04:45:11,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:45:11,029 INFO L93 Difference]: Finished difference Result 348 states and 475 transitions. [2022-03-19 04:45:11,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 04:45:11,030 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 86 [2022-03-19 04:45:11,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:45:11,032 INFO L225 Difference]: With dead ends: 348 [2022-03-19 04:45:11,032 INFO L226 Difference]: Without dead ends: 345 [2022-03-19 04:45:11,033 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 149 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2022-03-19 04:45:11,033 INFO L912 BasicCegarLoop]: 52 mSDtfsCounter, 58 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 04:45:11,033 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 437 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 04:45:11,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-03-19 04:45:11,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 330. [2022-03-19 04:45:11,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 191 states have (on average 1.193717277486911) internal successors, (228), 192 states have internal predecessors, (228), 115 states have call successors, (115), 24 states have call predecessors, (115), 23 states have return successors, (113), 113 states have call predecessors, (113), 113 states have call successors, (113) [2022-03-19 04:45:11,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 456 transitions. [2022-03-19 04:45:11,082 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 456 transitions. Word has length 86 [2022-03-19 04:45:11,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:45:11,082 INFO L478 AbstractCegarLoop]: Abstraction has 330 states and 456 transitions. [2022-03-19 04:45:11,082 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-19 04:45:11,082 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 456 transitions. [2022-03-19 04:45:11,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-19 04:45:11,083 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:45:11,083 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:45:11,112 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 04:45:11,301 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 04:45:11,302 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:45:11,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:45:11,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1455197645, now seen corresponding path program 3 times [2022-03-19 04:45:11,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:45:11,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2133180423] [2022-03-19 04:45:11,303 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:45:11,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1455197645, now seen corresponding path program 4 times [2022-03-19 04:45:11,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:45:11,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872926244] [2022-03-19 04:45:11,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:45:11,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:45:11,315 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:45:11,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [516607731] [2022-03-19 04:45:11,316 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:45:11,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:45:11,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:45:11,320 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 04:45:11,321 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 04:45:11,358 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:45:11,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:45:11,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 76 conjunts are in the unsatisfiable core [2022-03-19 04:45:11,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:45:12,170 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:45:12,174 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:45:24,856 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 52 proven. 28 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-03-19 04:45:24,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:45:25,829 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:45:25,837 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:45:29,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:45:29,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872926244] [2022-03-19 04:45:29,273 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:45:29,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516607731] [2022-03-19 04:45:29,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516607731] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 04:45:29,273 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 04:45:29,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-03-19 04:45:29,274 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:45:29,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2133180423] [2022-03-19 04:45:29,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2133180423] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:45:29,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:45:29,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-19 04:45:29,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135691807] [2022-03-19 04:45:29,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:45:29,274 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 04:45:29,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:45:29,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 04:45:29,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=594, Unknown=1, NotChecked=0, Total=702 [2022-03-19 04:45:29,275 INFO L87 Difference]: Start difference. First operand 330 states and 456 transitions. Second operand has 18 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-19 04:45:30,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:45:30,417 INFO L93 Difference]: Finished difference Result 377 states and 518 transitions. [2022-03-19 04:45:30,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 04:45:30,418 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 91 [2022-03-19 04:45:30,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:45:30,421 INFO L225 Difference]: With dead ends: 377 [2022-03-19 04:45:30,421 INFO L226 Difference]: Without dead ends: 374 [2022-03-19 04:45:30,421 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=166, Invalid=889, Unknown=1, NotChecked=0, Total=1056 [2022-03-19 04:45:30,422 INFO L912 BasicCegarLoop]: 50 mSDtfsCounter, 57 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 133 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 04:45:30,423 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 587 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 615 Invalid, 0 Unknown, 133 Unchecked, 0.6s Time] [2022-03-19 04:45:30,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-03-19 04:45:30,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 359. [2022-03-19 04:45:30,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 206 states have (on average 1.1990291262135921) internal successors, (247), 207 states have internal predecessors, (247), 127 states have call successors, (127), 26 states have call predecessors, (127), 25 states have return successors, (125), 125 states have call predecessors, (125), 125 states have call successors, (125) [2022-03-19 04:45:30,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 499 transitions. [2022-03-19 04:45:30,493 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 499 transitions. Word has length 91 [2022-03-19 04:45:30,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:45:30,494 INFO L478 AbstractCegarLoop]: Abstraction has 359 states and 499 transitions. [2022-03-19 04:45:30,495 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-19 04:45:30,495 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 499 transitions. [2022-03-19 04:45:30,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-19 04:45:30,497 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:45:30,497 INFO L500 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:45:30,517 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 04:45:30,715 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 04:45:30,715 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:45:30,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:45:30,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1983923522, now seen corresponding path program 1 times [2022-03-19 04:45:30,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:45:30,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [70136678] [2022-03-19 04:45:30,716 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:45:30,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1983923522, now seen corresponding path program 2 times [2022-03-19 04:45:30,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:45:30,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683597460] [2022-03-19 04:45:30,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:45:30,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:45:30,726 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:45:30,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [402195305] [2022-03-19 04:45:30,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:45:30,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:45:30,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:45:30,732 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 04:45:30,736 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 04:45:30,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:45:30,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:45:30,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 88 conjunts are in the unsatisfiable core [2022-03-19 04:45:30,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:45:31,607 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 64 proven. 45 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-03-19 04:45:31,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:45:34,380 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 80 proven. 19 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-03-19 04:45:34,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:45:34,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683597460] [2022-03-19 04:45:34,381 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:45:34,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402195305] [2022-03-19 04:45:34,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402195305] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:45:34,381 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:45:34,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 25 [2022-03-19 04:45:34,382 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:45:34,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [70136678] [2022-03-19 04:45:34,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [70136678] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:45:34,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:45:34,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-19 04:45:34,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365158664] [2022-03-19 04:45:34,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:45:34,382 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-19 04:45:34,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:45:34,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-19 04:45:34,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2022-03-19 04:45:34,383 INFO L87 Difference]: Start difference. First operand 359 states and 499 transitions. Second operand has 17 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 6 states have call successors, (14) [2022-03-19 04:45:35,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:45:35,448 INFO L93 Difference]: Finished difference Result 425 states and 583 transitions. [2022-03-19 04:45:35,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 04:45:35,459 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 6 states have call successors, (14) Word has length 99 [2022-03-19 04:45:35,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:45:35,462 INFO L225 Difference]: With dead ends: 425 [2022-03-19 04:45:35,462 INFO L226 Difference]: Without dead ends: 423 [2022-03-19 04:45:35,462 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 169 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=152, Invalid=718, Unknown=0, NotChecked=0, Total=870 [2022-03-19 04:45:35,463 INFO L912 BasicCegarLoop]: 60 mSDtfsCounter, 67 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 936 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-19 04:45:35,463 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 693 Invalid, 987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 936 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-19 04:45:35,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-03-19 04:45:35,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 363. [2022-03-19 04:45:35,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 209 states have (on average 1.1961722488038278) internal successors, (250), 210 states have internal predecessors, (250), 127 states have call successors, (127), 27 states have call predecessors, (127), 26 states have return successors, (125), 125 states have call predecessors, (125), 125 states have call successors, (125) [2022-03-19 04:45:35,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 502 transitions. [2022-03-19 04:45:35,536 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 502 transitions. Word has length 99 [2022-03-19 04:45:35,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:45:35,536 INFO L478 AbstractCegarLoop]: Abstraction has 363 states and 502 transitions. [2022-03-19 04:45:35,536 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 6 states have call successors, (14) [2022-03-19 04:45:35,536 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 502 transitions. [2022-03-19 04:45:35,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 04:45:35,537 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:45:35,537 INFO L500 BasicCegarLoop]: trace histogram [10, 9, 9, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:45:35,556 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 04:45:35,747 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 04:45:35,747 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:45:35,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:45:35,748 INFO L85 PathProgramCache]: Analyzing trace with hash -100199667, now seen corresponding path program 7 times [2022-03-19 04:45:35,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:45:35,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1138623475] [2022-03-19 04:45:35,748 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:45:35,748 INFO L85 PathProgramCache]: Analyzing trace with hash -100199667, now seen corresponding path program 8 times [2022-03-19 04:45:35,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:45:35,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060616337] [2022-03-19 04:45:35,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:45:35,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:45:35,755 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:45:35,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1182920333] [2022-03-19 04:45:35,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:45:35,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:45:35,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:45:35,756 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 04:45:35,757 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 04:45:35,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:45:35,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:45:35,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 89 conjunts are in the unsatisfiable core [2022-03-19 04:45:35,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:45:36,584 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:45:36,586 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:45:37,309 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 26 proven. 92 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-03-19 04:45:37,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:45:38,128 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 69 proven. 27 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-03-19 04:45:38,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:45:38,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060616337] [2022-03-19 04:45:38,129 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:45:38,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182920333] [2022-03-19 04:45:38,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182920333] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:45:38,129 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:45:38,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12] total 26 [2022-03-19 04:45:38,129 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:45:38,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1138623475] [2022-03-19 04:45:38,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1138623475] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:45:38,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:45:38,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-19 04:45:38,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074397684] [2022-03-19 04:45:38,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:45:38,130 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-19 04:45:38,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:45:38,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-19 04:45:38,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2022-03-19 04:45:38,130 INFO L87 Difference]: Start difference. First operand 363 states and 502 transitions. Second operand has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 7 states have call successors, (14) [2022-03-19 04:45:40,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:45:40,374 INFO L93 Difference]: Finished difference Result 470 states and 646 transitions. [2022-03-19 04:45:40,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 04:45:40,375 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 7 states have call successors, (14) Word has length 102 [2022-03-19 04:45:40,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:45:40,378 INFO L225 Difference]: With dead ends: 470 [2022-03-19 04:45:40,379 INFO L226 Difference]: Without dead ends: 468 [2022-03-19 04:45:40,379 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930 [2022-03-19 04:45:40,380 INFO L912 BasicCegarLoop]: 49 mSDtfsCounter, 66 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 870 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-19 04:45:40,380 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 629 Invalid, 904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 870 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-19 04:45:40,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2022-03-19 04:45:40,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 407. [2022-03-19 04:45:40,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 234 states have (on average 1.1965811965811965) internal successors, (280), 235 states have internal predecessors, (280), 143 states have call successors, (143), 30 states have call predecessors, (143), 29 states have return successors, (141), 141 states have call predecessors, (141), 141 states have call successors, (141) [2022-03-19 04:45:40,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 564 transitions. [2022-03-19 04:45:40,471 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 564 transitions. Word has length 102 [2022-03-19 04:45:40,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:45:40,471 INFO L478 AbstractCegarLoop]: Abstraction has 407 states and 564 transitions. [2022-03-19 04:45:40,471 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 7 states have call successors, (14) [2022-03-19 04:45:40,471 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 564 transitions. [2022-03-19 04:45:40,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-03-19 04:45:40,472 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:45:40,472 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:45:40,491 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 04:45:40,687 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 04:45:40,688 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:45:40,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:45:40,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1948981098, now seen corresponding path program 5 times [2022-03-19 04:45:40,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:45:40,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1005365934] [2022-03-19 04:45:40,689 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:45:40,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1948981098, now seen corresponding path program 6 times [2022-03-19 04:45:40,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:45:40,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398312086] [2022-03-19 04:45:40,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:45:40,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:45:40,697 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:45:40,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1389791392] [2022-03-19 04:45:40,697 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:45:40,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:45:40,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:45:40,698 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 04:45:40,700 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 04:45:40,842 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 04:45:40,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:45:40,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-19 04:45:40,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:45:41,402 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:45:41,523 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 57 proven. 33 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2022-03-19 04:45:41,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:45:41,686 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:46:42,488 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:46:54,516 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:47:05,353 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 61 proven. 35 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2022-03-19 04:47:05,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:47:05,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398312086] [2022-03-19 04:47:05,354 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:47:05,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389791392] [2022-03-19 04:47:05,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389791392] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:47:05,354 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:47:05,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2022-03-19 04:47:05,354 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:47:05,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1005365934] [2022-03-19 04:47:05,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1005365934] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:47:05,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:47:05,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 04:47:05,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936352800] [2022-03-19 04:47:05,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:47:05,355 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 04:47:05,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:47:05,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 04:47:05,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-03-19 04:47:05,355 INFO L87 Difference]: Start difference. First operand 407 states and 564 transitions. Second operand has 13 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2022-03-19 04:47:05,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:47:05,855 INFO L93 Difference]: Finished difference Result 495 states and 680 transitions. [2022-03-19 04:47:05,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 04:47:05,856 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) Word has length 108 [2022-03-19 04:47:05,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:47:05,859 INFO L225 Difference]: With dead ends: 495 [2022-03-19 04:47:05,859 INFO L226 Difference]: Without dead ends: 492 [2022-03-19 04:47:05,859 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 194 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2022-03-19 04:47:05,860 INFO L912 BasicCegarLoop]: 47 mSDtfsCounter, 48 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 04:47:05,860 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 364 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 04:47:05,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2022-03-19 04:47:05,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 409. [2022-03-19 04:47:05,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 238 states have (on average 1.1890756302521008) internal successors, (283), 239 states have internal predecessors, (283), 139 states have call successors, (139), 32 states have call predecessors, (139), 31 states have return successors, (137), 137 states have call predecessors, (137), 137 states have call successors, (137) [2022-03-19 04:47:05,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 559 transitions. [2022-03-19 04:47:05,963 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 559 transitions. Word has length 108 [2022-03-19 04:47:05,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:47:05,964 INFO L478 AbstractCegarLoop]: Abstraction has 409 states and 559 transitions. [2022-03-19 04:47:05,964 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2022-03-19 04:47:05,964 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 559 transitions. [2022-03-19 04:47:05,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-03-19 04:47:05,965 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:47:05,965 INFO L500 BasicCegarLoop]: trace histogram [10, 9, 9, 6, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:47:05,982 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 04:47:06,167 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 04:47:06,167 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:47:06,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:47:06,168 INFO L85 PathProgramCache]: Analyzing trace with hash 826422219, now seen corresponding path program 9 times [2022-03-19 04:47:06,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:47:06,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1008256788] [2022-03-19 04:47:06,169 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:47:06,169 INFO L85 PathProgramCache]: Analyzing trace with hash 826422219, now seen corresponding path program 10 times [2022-03-19 04:47:06,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:47:06,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841729379] [2022-03-19 04:47:06,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:47:06,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:47:06,183 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:47:06,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1677083157] [2022-03-19 04:47:06,183 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:47:06,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:47:06,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:47:06,186 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 04:47:06,187 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 04:47:06,248 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:47:06,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:47:06,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 99 conjunts are in the unsatisfiable core [2022-03-19 04:47:06,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:47:07,972 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 57 proven. 73 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-03-19 04:47:07,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:47:08,934 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 87 proven. 18 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-03-19 04:47:08,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:47:08,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841729379] [2022-03-19 04:47:08,935 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:47:08,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677083157] [2022-03-19 04:47:08,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677083157] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:47:08,935 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:47:08,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 13] total 30 [2022-03-19 04:47:08,936 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:47:08,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1008256788] [2022-03-19 04:47:08,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1008256788] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:47:08,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:47:08,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-19 04:47:08,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870315623] [2022-03-19 04:47:08,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:47:08,936 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-19 04:47:08,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:47:08,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-19 04:47:08,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2022-03-19 04:47:08,937 INFO L87 Difference]: Start difference. First operand 409 states and 559 transitions. Second operand has 22 states, 20 states have (on average 2.35) internal successors, (47), 18 states have internal predecessors, (47), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 6 states have call successors, (14) [2022-03-19 04:47:10,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:47:10,412 INFO L93 Difference]: Finished difference Result 519 states and 707 transitions. [2022-03-19 04:47:10,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-19 04:47:10,413 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.35) internal successors, (47), 18 states have internal predecessors, (47), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 6 states have call successors, (14) Word has length 107 [2022-03-19 04:47:10,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:47:10,415 INFO L225 Difference]: With dead ends: 519 [2022-03-19 04:47:10,415 INFO L226 Difference]: Without dead ends: 517 [2022-03-19 04:47:10,416 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 183 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=222, Invalid=1338, Unknown=0, NotChecked=0, Total=1560 [2022-03-19 04:47:10,416 INFO L912 BasicCegarLoop]: 56 mSDtfsCounter, 87 mSDsluCounter, 764 mSDsCounter, 0 mSdLazyCounter, 1188 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 820 SdHoareTripleChecker+Invalid, 1268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-19 04:47:10,416 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 820 Invalid, 1268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1188 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-19 04:47:10,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2022-03-19 04:47:10,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 495. [2022-03-19 04:47:10,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 288 states have (on average 1.1909722222222223) internal successors, (343), 289 states have internal predecessors, (343), 171 states have call successors, (171), 36 states have call predecessors, (171), 35 states have return successors, (169), 169 states have call predecessors, (169), 169 states have call successors, (169) [2022-03-19 04:47:10,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 683 transitions. [2022-03-19 04:47:10,523 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 683 transitions. Word has length 107 [2022-03-19 04:47:10,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:47:10,523 INFO L478 AbstractCegarLoop]: Abstraction has 495 states and 683 transitions. [2022-03-19 04:47:10,523 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.35) internal successors, (47), 18 states have internal predecessors, (47), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 6 states have call successors, (14) [2022-03-19 04:47:10,523 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 683 transitions. [2022-03-19 04:47:10,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-03-19 04:47:10,524 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:47:10,524 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1] [2022-03-19 04:47:10,541 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 04:47:10,736 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 04:47:10,736 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:47:10,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:47:10,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1002671399, now seen corresponding path program 7 times [2022-03-19 04:47:10,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:47:10,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1323094036] [2022-03-19 04:47:10,737 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:47:10,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1002671399, now seen corresponding path program 8 times [2022-03-19 04:47:10,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:47:10,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877431681] [2022-03-19 04:47:10,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:47:10,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:47:10,743 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:47:10,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [906385860] [2022-03-19 04:47:10,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:47:10,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:47:10,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:47:10,744 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 04:47:10,745 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 04:47:10,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:47:10,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:47:10,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 68 conjunts are in the unsatisfiable core [2022-03-19 04:47:10,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:47:11,712 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:47:12,908 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 90 proven. 42 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2022-03-19 04:47:12,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:47:13,376 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:47:13,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:47:13,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877431681] [2022-03-19 04:47:13,895 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:47:13,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906385860] [2022-03-19 04:47:13,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906385860] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 04:47:13,895 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 04:47:13,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-03-19 04:47:13,895 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:47:13,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1323094036] [2022-03-19 04:47:13,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1323094036] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:47:13,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:47:13,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-19 04:47:13,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609861516] [2022-03-19 04:47:13,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:47:13,896 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 04:47:13,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:47:13,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 04:47:13,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-03-19 04:47:13,897 INFO L87 Difference]: Start difference. First operand 495 states and 683 transitions. Second operand has 18 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-19 04:47:15,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:47:15,500 INFO L93 Difference]: Finished difference Result 584 states and 806 transitions. [2022-03-19 04:47:15,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 04:47:15,501 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) Word has length 111 [2022-03-19 04:47:15,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:47:15,503 INFO L225 Difference]: With dead ends: 584 [2022-03-19 04:47:15,503 INFO L226 Difference]: Without dead ends: 581 [2022-03-19 04:47:15,504 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2022-03-19 04:47:15,504 INFO L912 BasicCegarLoop]: 53 mSDtfsCounter, 59 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 795 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-19 04:47:15,504 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 555 Invalid, 851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 795 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-19 04:47:15,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2022-03-19 04:47:15,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 527. [2022-03-19 04:47:15,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 306 states have (on average 1.1928104575163399) internal successors, (365), 307 states have internal predecessors, (365), 183 states have call successors, (183), 38 states have call predecessors, (183), 37 states have return successors, (181), 181 states have call predecessors, (181), 181 states have call successors, (181) [2022-03-19 04:47:15,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 729 transitions. [2022-03-19 04:47:15,626 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 729 transitions. Word has length 111 [2022-03-19 04:47:15,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:47:15,627 INFO L478 AbstractCegarLoop]: Abstraction has 527 states and 729 transitions. [2022-03-19 04:47:15,627 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-19 04:47:15,627 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 729 transitions. [2022-03-19 04:47:15,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-03-19 04:47:15,628 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:47:15,628 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1] [2022-03-19 04:47:15,644 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 04:47:15,833 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 04:47:15,833 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:47:15,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:47:15,833 INFO L85 PathProgramCache]: Analyzing trace with hash 890766036, now seen corresponding path program 9 times [2022-03-19 04:47:15,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:47:15,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1082958121] [2022-03-19 04:47:15,834 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:47:15,834 INFO L85 PathProgramCache]: Analyzing trace with hash 890766036, now seen corresponding path program 10 times [2022-03-19 04:47:15,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:47:15,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026164460] [2022-03-19 04:47:15,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:47:15,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:47:15,839 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:47:15,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1674008784] [2022-03-19 04:47:15,839 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:47:15,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:47:15,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:47:15,840 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 04:47:15,841 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 04:47:15,884 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:47:15,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:47:15,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 80 conjunts are in the unsatisfiable core [2022-03-19 04:47:15,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:47:16,981 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:47:16,983 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:47:16,985 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:47:27,922 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 60 proven. 76 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2022-03-19 04:47:27,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:47:31,401 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:47:31,402 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:47:35,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:47:35,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026164460] [2022-03-19 04:47:35,026 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:47:35,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674008784] [2022-03-19 04:47:35,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674008784] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 04:47:35,026 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 04:47:35,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2022-03-19 04:47:35,027 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:47:35,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1082958121] [2022-03-19 04:47:35,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1082958121] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:47:35,027 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:47:35,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-19 04:47:35,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712100805] [2022-03-19 04:47:35,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:47:35,027 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-19 04:47:35,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:47:35,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-19 04:47:35,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=643, Unknown=1, NotChecked=0, Total=756 [2022-03-19 04:47:35,028 INFO L87 Difference]: Start difference. First operand 527 states and 729 transitions. Second operand has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 16 states have internal predecessors, (38), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-19 04:47:42,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:47:42,762 INFO L93 Difference]: Finished difference Result 619 states and 855 transitions. [2022-03-19 04:47:42,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-19 04:47:42,764 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 16 states have internal predecessors, (38), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 113 [2022-03-19 04:47:42,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:47:42,766 INFO L225 Difference]: With dead ends: 619 [2022-03-19 04:47:42,766 INFO L226 Difference]: Without dead ends: 616 [2022-03-19 04:47:42,767 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=146, Invalid=909, Unknown=1, NotChecked=0, Total=1056 [2022-03-19 04:47:42,767 INFO L912 BasicCegarLoop]: 66 mSDtfsCounter, 71 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 906 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-19 04:47:42,767 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 630 Invalid, 998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 906 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-19 04:47:42,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2022-03-19 04:47:42,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 596. [2022-03-19 04:47:42,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 343 states have (on average 1.1982507288629738) internal successors, (411), 344 states have internal predecessors, (411), 211 states have call successors, (211), 42 states have call predecessors, (211), 41 states have return successors, (209), 209 states have call predecessors, (209), 209 states have call successors, (209) [2022-03-19 04:47:42,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 831 transitions. [2022-03-19 04:47:42,911 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 831 transitions. Word has length 113 [2022-03-19 04:47:42,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:47:42,911 INFO L478 AbstractCegarLoop]: Abstraction has 596 states and 831 transitions. [2022-03-19 04:47:42,911 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 16 states have internal predecessors, (38), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-19 04:47:42,911 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 831 transitions. [2022-03-19 04:47:42,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-19 04:47:42,917 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:47:42,917 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:47:42,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-19 04:47:43,131 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 04:47:43,131 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:47:43,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:47:43,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1938711081, now seen corresponding path program 11 times [2022-03-19 04:47:43,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:47:43,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2130781890] [2022-03-19 04:47:43,132 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:47:43,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1938711081, now seen corresponding path program 12 times [2022-03-19 04:47:43,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:47:43,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424459839] [2022-03-19 04:47:43,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:47:43,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:47:43,138 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:47:43,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1610364366] [2022-03-19 04:47:43,138 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:47:43,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:47:43,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:47:43,139 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 04:47:43,140 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 04:47:43,208 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-19 04:47:43,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:47:43,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 79 conjunts are in the unsatisfiable core [2022-03-19 04:47:43,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:47:44,070 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 26 proven. 69 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2022-03-19 04:47:44,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:47:47,580 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 26 proven. 69 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2022-03-19 04:47:47,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:47:47,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424459839] [2022-03-19 04:47:47,580 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:47:47,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610364366] [2022-03-19 04:47:47,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610364366] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:47:47,580 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:47:47,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 32 [2022-03-19 04:47:47,581 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:47:47,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2130781890] [2022-03-19 04:47:47,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2130781890] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:47:47,581 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:47:47,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-19 04:47:47,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192509626] [2022-03-19 04:47:47,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:47:47,581 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 04:47:47,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:47:47,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 04:47:47,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=843, Unknown=0, NotChecked=0, Total=992 [2022-03-19 04:47:47,582 INFO L87 Difference]: Start difference. First operand 596 states and 831 transitions. Second operand has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 5 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2022-03-19 04:47:48,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:47:48,954 INFO L93 Difference]: Finished difference Result 665 states and 919 transitions. [2022-03-19 04:47:48,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-19 04:47:48,954 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 5 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 116 [2022-03-19 04:47:48,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:47:48,956 INFO L225 Difference]: With dead ends: 665 [2022-03-19 04:47:48,957 INFO L226 Difference]: Without dead ends: 662 [2022-03-19 04:47:48,957 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 200 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=294, Invalid=1512, Unknown=0, NotChecked=0, Total=1806 [2022-03-19 04:47:48,957 INFO L912 BasicCegarLoop]: 60 mSDtfsCounter, 79 mSDsluCounter, 609 mSDsCounter, 0 mSdLazyCounter, 959 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 1074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 04:47:48,958 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 669 Invalid, 1074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 959 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 04:47:48,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2022-03-19 04:47:49,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 600. [2022-03-19 04:47:49,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 346 states have (on average 1.1965317919075145) internal successors, (414), 347 states have internal predecessors, (414), 211 states have call successors, (211), 43 states have call predecessors, (211), 42 states have return successors, (209), 209 states have call predecessors, (209), 209 states have call successors, (209) [2022-03-19 04:47:49,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 834 transitions. [2022-03-19 04:47:49,107 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 834 transitions. Word has length 116 [2022-03-19 04:47:49,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:47:49,108 INFO L478 AbstractCegarLoop]: Abstraction has 600 states and 834 transitions. [2022-03-19 04:47:49,108 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 5 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2022-03-19 04:47:49,108 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 834 transitions. [2022-03-19 04:47:49,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-19 04:47:49,110 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:47:49,110 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:47:49,129 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 04:47:49,319 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 04:47:49,319 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:47:49,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:47:49,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1687072417, now seen corresponding path program 13 times [2022-03-19 04:47:49,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:47:49,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [55529678] [2022-03-19 04:47:49,320 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:47:49,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1687072417, now seen corresponding path program 14 times [2022-03-19 04:47:49,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:47:49,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279563119] [2022-03-19 04:47:49,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:47:49,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:47:49,326 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:47:49,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1622236975] [2022-03-19 04:47:49,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:47:49,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:47:49,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:47:49,341 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 04:47:49,343 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 04:47:49,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:47:49,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:47:49,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 91 conjunts are in the unsatisfiable core [2022-03-19 04:47:49,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:47:50,566 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 95 proven. 63 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-03-19 04:47:50,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:47:52,336 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:47:52,338 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:47:57,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:47:57,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279563119] [2022-03-19 04:47:57,906 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:47:57,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622236975] [2022-03-19 04:47:57,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622236975] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 04:47:57,906 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 04:47:57,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-03-19 04:47:57,907 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:47:57,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [55529678] [2022-03-19 04:47:57,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [55529678] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:47:57,907 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:47:57,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-19 04:47:57,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21889481] [2022-03-19 04:47:57,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:47:57,908 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-19 04:47:57,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:47:57,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-19 04:47:57,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=702, Unknown=1, NotChecked=0, Total=812 [2022-03-19 04:47:57,908 INFO L87 Difference]: Start difference. First operand 600 states and 834 transitions. Second operand has 20 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-19 04:48:00,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:48:00,535 INFO L93 Difference]: Finished difference Result 691 states and 960 transitions. [2022-03-19 04:48:00,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-19 04:48:00,536 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 116 [2022-03-19 04:48:00,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:48:00,539 INFO L225 Difference]: With dead ends: 691 [2022-03-19 04:48:00,539 INFO L226 Difference]: Without dead ends: 688 [2022-03-19 04:48:00,539 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 120 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=189, Invalid=1216, Unknown=1, NotChecked=0, Total=1406 [2022-03-19 04:48:00,540 INFO L912 BasicCegarLoop]: 60 mSDtfsCounter, 71 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 1096 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 784 SdHoareTripleChecker+Invalid, 1175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1096 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:48:00,540 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 784 Invalid, 1175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1096 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-19 04:48:00,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2022-03-19 04:48:00,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 665. [2022-03-19 04:48:00,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 380 states have (on average 1.2026315789473685) internal successors, (457), 381 states have internal predecessors, (457), 239 states have call successors, (239), 46 states have call predecessors, (239), 45 states have return successors, (237), 237 states have call predecessors, (237), 237 states have call successors, (237) [2022-03-19 04:48:00,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 933 transitions. [2022-03-19 04:48:00,714 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 933 transitions. Word has length 116 [2022-03-19 04:48:00,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:48:00,714 INFO L478 AbstractCegarLoop]: Abstraction has 665 states and 933 transitions. [2022-03-19 04:48:00,715 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-19 04:48:00,715 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 933 transitions. [2022-03-19 04:48:00,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-03-19 04:48:00,716 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:48:00,716 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:48:00,735 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 04:48:00,933 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 04:48:00,933 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:48:00,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:48:00,933 INFO L85 PathProgramCache]: Analyzing trace with hash 764235165, now seen corresponding path program 15 times [2022-03-19 04:48:00,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:48:00,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [775464012] [2022-03-19 04:48:00,934 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:48:00,934 INFO L85 PathProgramCache]: Analyzing trace with hash 764235165, now seen corresponding path program 16 times [2022-03-19 04:48:00,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:48:00,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37513129] [2022-03-19 04:48:00,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:48:00,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:48:00,942 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:48:00,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1560635329] [2022-03-19 04:48:00,942 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:48:00,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:48:00,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:48:00,951 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 04:48:00,953 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 04:48:01,013 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:48:01,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:48:01,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 118 conjunts are in the unsatisfiable core [2022-03-19 04:48:01,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:48:02,814 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 113 proven. 70 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2022-03-19 04:48:02,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:48:04,726 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 129 proven. 17 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-19 04:48:04,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:48:04,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37513129] [2022-03-19 04:48:04,726 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:48:04,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560635329] [2022-03-19 04:48:04,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560635329] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:48:04,727 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:48:04,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 15] total 35 [2022-03-19 04:48:04,727 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:48:04,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [775464012] [2022-03-19 04:48:04,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [775464012] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:48:04,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:48:04,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-19 04:48:04,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648085370] [2022-03-19 04:48:04,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:48:04,727 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-19 04:48:04,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:48:04,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-19 04:48:04,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=999, Unknown=0, NotChecked=0, Total=1190 [2022-03-19 04:48:04,728 INFO L87 Difference]: Start difference. First operand 665 states and 933 transitions. Second operand has 25 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-19 04:48:06,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:48:06,870 INFO L93 Difference]: Finished difference Result 773 states and 1073 transitions. [2022-03-19 04:48:06,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-19 04:48:06,870 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) Word has length 121 [2022-03-19 04:48:06,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:48:06,873 INFO L225 Difference]: With dead ends: 773 [2022-03-19 04:48:06,873 INFO L226 Difference]: Without dead ends: 770 [2022-03-19 04:48:06,874 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 204 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=309, Invalid=1761, Unknown=0, NotChecked=0, Total=2070 [2022-03-19 04:48:06,874 INFO L912 BasicCegarLoop]: 59 mSDtfsCounter, 110 mSDsluCounter, 861 mSDsCounter, 0 mSdLazyCounter, 1893 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 920 SdHoareTripleChecker+Invalid, 1994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:48:06,875 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 920 Invalid, 1994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1893 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-19 04:48:06,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2022-03-19 04:48:07,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 699. [2022-03-19 04:48:07,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 398 states have (on average 1.2035175879396984) internal successors, (479), 399 states have internal predecessors, (479), 251 states have call successors, (251), 50 states have call predecessors, (251), 49 states have return successors, (249), 249 states have call predecessors, (249), 249 states have call successors, (249) [2022-03-19 04:48:07,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 979 transitions. [2022-03-19 04:48:07,069 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 979 transitions. Word has length 121 [2022-03-19 04:48:07,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:48:07,069 INFO L478 AbstractCegarLoop]: Abstraction has 699 states and 979 transitions. [2022-03-19 04:48:07,069 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-19 04:48:07,069 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 979 transitions. [2022-03-19 04:48:07,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-03-19 04:48:07,071 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:48:07,071 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2022-03-19 04:48:07,089 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 04:48:07,277 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 04:48:07,277 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:48:07,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:48:07,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1339589678, now seen corresponding path program 3 times [2022-03-19 04:48:07,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:48:07,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [269253760] [2022-03-19 04:48:07,286 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:48:07,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1339589678, now seen corresponding path program 4 times [2022-03-19 04:48:07,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:48:07,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507578274] [2022-03-19 04:48:07,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:48:07,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:48:07,295 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:48:07,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1951989517] [2022-03-19 04:48:07,296 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:48:07,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:48:07,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:48:07,297 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 04:48:07,298 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 04:48:07,357 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:48:07,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:48:07,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 87 conjunts are in the unsatisfiable core [2022-03-19 04:48:07,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:48:08,344 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:48:08,457 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 76 proven. 113 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2022-03-19 04:48:08,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:48:09,706 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 110 proven. 27 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2022-03-19 04:48:09,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:48:09,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507578274] [2022-03-19 04:48:09,706 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:48:09,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951989517] [2022-03-19 04:48:09,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951989517] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:48:09,706 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:48:09,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 13] total 29 [2022-03-19 04:48:09,707 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:48:09,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [269253760] [2022-03-19 04:48:09,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [269253760] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:48:09,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:48:09,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-19 04:48:09,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545328816] [2022-03-19 04:48:09,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:48:09,707 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-19 04:48:09,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:48:09,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-19 04:48:09,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=670, Unknown=0, NotChecked=0, Total=812 [2022-03-19 04:48:09,708 INFO L87 Difference]: Start difference. First operand 699 states and 979 transitions. Second operand has 21 states, 20 states have (on average 2.2) internal successors, (44), 17 states have internal predecessors, (44), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 8 states have call successors, (18) [2022-03-19 04:48:11,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:48:11,006 INFO L93 Difference]: Finished difference Result 818 states and 1133 transitions. [2022-03-19 04:48:11,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-19 04:48:11,007 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.2) internal successors, (44), 17 states have internal predecessors, (44), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 8 states have call successors, (18) Word has length 124 [2022-03-19 04:48:11,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:48:11,010 INFO L225 Difference]: With dead ends: 818 [2022-03-19 04:48:11,010 INFO L226 Difference]: Without dead ends: 816 [2022-03-19 04:48:11,010 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 219 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=205, Invalid=1055, Unknown=0, NotChecked=0, Total=1260 [2022-03-19 04:48:11,011 INFO L912 BasicCegarLoop]: 59 mSDtfsCounter, 78 mSDsluCounter, 710 mSDsCounter, 0 mSdLazyCounter, 1088 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 769 SdHoareTripleChecker+Invalid, 1182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1088 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 04:48:11,011 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 769 Invalid, 1182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1088 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-19 04:48:11,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2022-03-19 04:48:11,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 751. [2022-03-19 04:48:11,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 429 states have (on average 1.2004662004662006) internal successors, (515), 430 states have internal predecessors, (515), 267 states have call successors, (267), 55 states have call predecessors, (267), 54 states have return successors, (265), 265 states have call predecessors, (265), 265 states have call successors, (265) [2022-03-19 04:48:11,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 1047 transitions. [2022-03-19 04:48:11,209 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 1047 transitions. Word has length 124 [2022-03-19 04:48:11,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:48:11,210 INFO L478 AbstractCegarLoop]: Abstraction has 751 states and 1047 transitions. [2022-03-19 04:48:11,210 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.2) internal successors, (44), 17 states have internal predecessors, (44), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 8 states have call successors, (18) [2022-03-19 04:48:11,210 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 1047 transitions. [2022-03-19 04:48:11,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-03-19 04:48:11,211 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:48:11,212 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2022-03-19 04:48:11,249 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 04:48:11,431 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 04:48:11,431 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:48:11,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:48:11,432 INFO L85 PathProgramCache]: Analyzing trace with hash -590650772, now seen corresponding path program 5 times [2022-03-19 04:48:11,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:48:11,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1942680518] [2022-03-19 04:48:11,432 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:48:11,432 INFO L85 PathProgramCache]: Analyzing trace with hash -590650772, now seen corresponding path program 6 times [2022-03-19 04:48:11,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:48:11,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095833022] [2022-03-19 04:48:11,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:48:11,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:48:11,438 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:48:11,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [721451874] [2022-03-19 04:48:11,438 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:48:11,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:48:11,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:48:11,439 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 04:48:11,440 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 04:48:11,495 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 04:48:11,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:48:11,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-19 04:48:11,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:48:11,800 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 95 proven. 62 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2022-03-19 04:48:11,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:48:14,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:48:14,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095833022] [2022-03-19 04:48:14,482 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:48:14,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721451874] [2022-03-19 04:48:14,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721451874] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 04:48:14,482 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 04:48:14,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-03-19 04:48:14,482 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:48:14,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1942680518] [2022-03-19 04:48:14,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1942680518] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:48:14,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:48:14,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 04:48:14,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400217946] [2022-03-19 04:48:14,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:48:14,483 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 04:48:14,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:48:14,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 04:48:14,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=199, Unknown=1, NotChecked=0, Total=240 [2022-03-19 04:48:14,484 INFO L87 Difference]: Start difference. First operand 751 states and 1047 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 4 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2022-03-19 04:48:15,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:48:15,226 INFO L93 Difference]: Finished difference Result 792 states and 1089 transitions. [2022-03-19 04:48:15,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 04:48:15,226 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 4 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) Word has length 129 [2022-03-19 04:48:15,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:48:15,229 INFO L225 Difference]: With dead ends: 792 [2022-03-19 04:48:15,229 INFO L226 Difference]: Without dead ends: 790 [2022-03-19 04:48:15,230 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 136 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=105, Invalid=446, Unknown=1, NotChecked=0, Total=552 [2022-03-19 04:48:15,231 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 56 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 04:48:15,231 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 267 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 04:48:15,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2022-03-19 04:48:15,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 764. [2022-03-19 04:48:15,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 438 states have (on average 1.1963470319634704) internal successors, (524), 440 states have internal predecessors, (524), 269 states have call successors, (269), 57 states have call predecessors, (269), 56 states have return successors, (267), 266 states have call predecessors, (267), 267 states have call successors, (267) [2022-03-19 04:48:15,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 1060 transitions. [2022-03-19 04:48:15,442 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 1060 transitions. Word has length 129 [2022-03-19 04:48:15,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:48:15,442 INFO L478 AbstractCegarLoop]: Abstraction has 764 states and 1060 transitions. [2022-03-19 04:48:15,442 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 4 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2022-03-19 04:48:15,443 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 1060 transitions. [2022-03-19 04:48:15,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-03-19 04:48:15,444 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:48:15,444 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:48:15,462 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 04:48:15,659 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 04:48:15,659 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:48:15,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:48:15,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1469141304, now seen corresponding path program 17 times [2022-03-19 04:48:15,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:48:15,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [600615932] [2022-03-19 04:48:15,660 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:48:15,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1469141304, now seen corresponding path program 18 times [2022-03-19 04:48:15,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:48:15,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071953293] [2022-03-19 04:48:15,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:48:15,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:48:15,665 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:48:15,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1121652235] [2022-03-19 04:48:15,666 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:48:15,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:48:15,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:48:15,667 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 04:48:15,668 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 04:48:15,731 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-19 04:48:15,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:48:15,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-19 04:48:15,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:48:15,920 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 243 proven. 18 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2022-03-19 04:48:15,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:48:16,101 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 59 proven. 18 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2022-03-19 04:48:16,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:48:16,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071953293] [2022-03-19 04:48:16,102 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:48:16,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121652235] [2022-03-19 04:48:16,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121652235] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:48:16,102 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:48:16,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2022-03-19 04:48:16,102 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:48:16,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [600615932] [2022-03-19 04:48:16,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [600615932] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:48:16,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:48:16,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 04:48:16,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404073371] [2022-03-19 04:48:16,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:48:16,103 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 04:48:16,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:48:16,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 04:48:16,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-19 04:48:16,103 INFO L87 Difference]: Start difference. First operand 764 states and 1060 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 5 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2022-03-19 04:48:16,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:48:16,540 INFO L93 Difference]: Finished difference Result 1341 states and 1936 transitions. [2022-03-19 04:48:16,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 04:48:16,540 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 5 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) Word has length 133 [2022-03-19 04:48:16,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:48:16,545 INFO L225 Difference]: With dead ends: 1341 [2022-03-19 04:48:16,545 INFO L226 Difference]: Without dead ends: 991 [2022-03-19 04:48:16,546 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 259 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-03-19 04:48:16,546 INFO L912 BasicCegarLoop]: 66 mSDtfsCounter, 9 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:48:16,546 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 291 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:48:16,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2022-03-19 04:48:16,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 873. [2022-03-19 04:48:16,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 484 states have (on average 1.2148760330578512) internal successors, (588), 499 states have internal predecessors, (588), 336 states have call successors, (336), 53 states have call predecessors, (336), 52 states have return successors, (334), 320 states have call predecessors, (334), 334 states have call successors, (334) [2022-03-19 04:48:16,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 1258 transitions. [2022-03-19 04:48:16,823 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 1258 transitions. Word has length 133 [2022-03-19 04:48:16,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:48:16,823 INFO L478 AbstractCegarLoop]: Abstraction has 873 states and 1258 transitions. [2022-03-19 04:48:16,823 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 5 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2022-03-19 04:48:16,823 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 1258 transitions. [2022-03-19 04:48:16,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-03-19 04:48:16,824 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:48:16,824 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:48:16,841 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 04:48:17,039 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 04:48:17,039 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:48:17,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:48:17,040 INFO L85 PathProgramCache]: Analyzing trace with hash -914829018, now seen corresponding path program 19 times [2022-03-19 04:48:17,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:48:17,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1201018889] [2022-03-19 04:48:17,040 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:48:17,040 INFO L85 PathProgramCache]: Analyzing trace with hash -914829018, now seen corresponding path program 20 times [2022-03-19 04:48:17,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:48:17,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763494167] [2022-03-19 04:48:17,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:48:17,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:48:17,046 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:48:17,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [68335799] [2022-03-19 04:48:17,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:48:17,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:48:17,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:48:17,047 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 04:48:17,049 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 04:48:17,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:48:17,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:48:17,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 81 conjunts are in the unsatisfiable core [2022-03-19 04:48:17,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:48:18,100 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 133 proven. 88 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2022-03-19 04:48:18,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:48:20,026 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 134 proven. 60 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2022-03-19 04:48:20,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:48:20,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763494167] [2022-03-19 04:48:20,026 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:48:20,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68335799] [2022-03-19 04:48:20,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68335799] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:48:20,027 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:48:20,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 31 [2022-03-19 04:48:20,027 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:48:20,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1201018889] [2022-03-19 04:48:20,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1201018889] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:48:20,027 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:48:20,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-19 04:48:20,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692776144] [2022-03-19 04:48:20,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:48:20,027 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-19 04:48:20,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:48:20,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-19 04:48:20,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=744, Unknown=0, NotChecked=0, Total=930 [2022-03-19 04:48:20,028 INFO L87 Difference]: Start difference. First operand 873 states and 1258 transitions. Second operand has 17 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) [2022-03-19 04:48:20,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:48:20,848 INFO L93 Difference]: Finished difference Result 1004 states and 1446 transitions. [2022-03-19 04:48:20,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 04:48:20,848 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) Word has length 133 [2022-03-19 04:48:20,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:48:20,852 INFO L225 Difference]: With dead ends: 1004 [2022-03-19 04:48:20,852 INFO L226 Difference]: Without dead ends: 1001 [2022-03-19 04:48:20,853 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 232 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=225, Invalid=965, Unknown=0, NotChecked=0, Total=1190 [2022-03-19 04:48:20,853 INFO L912 BasicCegarLoop]: 58 mSDtfsCounter, 51 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 04:48:20,853 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 586 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 825 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 04:48:20,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1001 states. [2022-03-19 04:48:21,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1001 to 912. [2022-03-19 04:48:21,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 504 states have (on average 1.2162698412698412) internal successors, (613), 519 states have internal predecessors, (613), 352 states have call successors, (352), 56 states have call predecessors, (352), 55 states have return successors, (350), 336 states have call predecessors, (350), 350 states have call successors, (350) [2022-03-19 04:48:21,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 1315 transitions. [2022-03-19 04:48:21,145 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 1315 transitions. Word has length 133 [2022-03-19 04:48:21,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:48:21,145 INFO L478 AbstractCegarLoop]: Abstraction has 912 states and 1315 transitions. [2022-03-19 04:48:21,145 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) [2022-03-19 04:48:21,145 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 1315 transitions. [2022-03-19 04:48:21,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-19 04:48:21,147 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:48:21,147 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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 04:48:21,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-19 04:48:21,357 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 04:48:21,357 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:48:21,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:48:21,358 INFO L85 PathProgramCache]: Analyzing trace with hash -112069451, now seen corresponding path program 21 times [2022-03-19 04:48:21,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:48:21,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [104883772] [2022-03-19 04:48:21,358 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:48:21,358 INFO L85 PathProgramCache]: Analyzing trace with hash -112069451, now seen corresponding path program 22 times [2022-03-19 04:48:21,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:48:21,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82800091] [2022-03-19 04:48:21,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:48:21,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:48:21,365 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:48:21,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1754549580] [2022-03-19 04:48:21,365 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:48:21,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:48:21,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:48:21,367 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 04:48:21,367 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 04:48:21,419 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:48:21,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:48:21,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 84 conjunts are in the unsatisfiable core [2022-03-19 04:48:21,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:48:23,039 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:48:23,043 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:48:23,061 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:48:23,067 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:48:23,072 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:48:25,198 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 116 proven. 82 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2022-03-19 04:48:25,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:48:33,768 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:48:34,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:48:34,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82800091] [2022-03-19 04:48:34,227 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:48:34,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754549580] [2022-03-19 04:48:34,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754549580] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 04:48:34,227 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 04:48:34,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-03-19 04:48:34,227 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:48:34,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [104883772] [2022-03-19 04:48:34,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [104883772] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:48:34,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:48:34,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-19 04:48:34,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746861407] [2022-03-19 04:48:34,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:48:34,228 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-19 04:48:34,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:48:34,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-19 04:48:34,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=795, Unknown=1, NotChecked=0, Total=930 [2022-03-19 04:48:34,229 INFO L87 Difference]: Start difference. First operand 912 states and 1315 transitions. Second operand has 20 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) [2022-03-19 04:48:45,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:48:45,143 INFO L93 Difference]: Finished difference Result 1048 states and 1511 transitions. [2022-03-19 04:48:45,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-19 04:48:45,144 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) Word has length 135 [2022-03-19 04:48:45,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:48:45,148 INFO L225 Difference]: With dead ends: 1048 [2022-03-19 04:48:45,148 INFO L226 Difference]: Without dead ends: 1045 [2022-03-19 04:48:45,149 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 182 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=184, Invalid=1147, Unknown=1, NotChecked=0, Total=1332 [2022-03-19 04:48:45,149 INFO L912 BasicCegarLoop]: 71 mSDtfsCounter, 69 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 1107 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 795 SdHoareTripleChecker+Invalid, 1189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-03-19 04:48:45,149 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 795 Invalid, 1189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1107 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-03-19 04:48:45,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1045 states. [2022-03-19 04:48:45,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1045 to 1005. [2022-03-19 04:48:45,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1005 states, 551 states have (on average 1.221415607985481) internal successors, (673), 567 states have internal predecessors, (673), 394 states have call successors, (394), 60 states have call predecessors, (394), 59 states have return successors, (392), 377 states have call predecessors, (392), 392 states have call successors, (392) [2022-03-19 04:48:45,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1005 states to 1005 states and 1459 transitions. [2022-03-19 04:48:45,467 INFO L78 Accepts]: Start accepts. Automaton has 1005 states and 1459 transitions. Word has length 135 [2022-03-19 04:48:45,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:48:45,467 INFO L478 AbstractCegarLoop]: Abstraction has 1005 states and 1459 transitions. [2022-03-19 04:48:45,467 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) [2022-03-19 04:48:45,468 INFO L276 IsEmpty]: Start isEmpty. Operand 1005 states and 1459 transitions. [2022-03-19 04:48:45,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-03-19 04:48:45,469 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:48:45,469 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:48:45,499 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 04:48:45,683 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 04:48:45,683 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:48:45,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:48:45,684 INFO L85 PathProgramCache]: Analyzing trace with hash -2035738456, now seen corresponding path program 23 times [2022-03-19 04:48:45,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:48:45,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1281598050] [2022-03-19 04:48:45,684 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:48:45,684 INFO L85 PathProgramCache]: Analyzing trace with hash -2035738456, now seen corresponding path program 24 times [2022-03-19 04:48:45,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:48:45,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056143919] [2022-03-19 04:48:45,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:48:45,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:48:45,692 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:48:45,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [617827532] [2022-03-19 04:48:45,693 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:48:45,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:48:45,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:48:45,694 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 04:48:45,694 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 04:48:45,770 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-03-19 04:48:45,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:48:45,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 91 conjunts are in the unsatisfiable core [2022-03-19 04:48:45,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:48:50,279 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 98 proven. 107 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2022-03-19 04:48:50,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:48:53,877 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:48:53,880 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:48:53,881 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:49:02,871 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:49:02,881 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:49:31,899 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 98 proven. 107 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2022-03-19 04:49:31,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:49:31,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056143919] [2022-03-19 04:49:31,899 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:49:31,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617827532] [2022-03-19 04:49:31,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617827532] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:49:31,899 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:49:31,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 38 [2022-03-19 04:49:31,900 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:49:31,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1281598050] [2022-03-19 04:49:31,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1281598050] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:49:31,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:49:31,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-19 04:49:31,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445037355] [2022-03-19 04:49:31,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:49:31,900 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-19 04:49:31,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:49:31,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-19 04:49:31,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1173, Unknown=3, NotChecked=0, Total=1406 [2022-03-19 04:49:31,901 INFO L87 Difference]: Start difference. First operand 1005 states and 1459 transitions. Second operand has 21 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) [2022-03-19 04:49:34,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:49:34,870 INFO L93 Difference]: Finished difference Result 1050 states and 1510 transitions. [2022-03-19 04:49:34,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-19 04:49:34,871 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) Word has length 138 [2022-03-19 04:49:34,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:49:34,875 INFO L225 Difference]: With dead ends: 1050 [2022-03-19 04:49:34,876 INFO L226 Difference]: Without dead ends: 1043 [2022-03-19 04:49:34,876 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 238 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 37.9s TimeCoverageRelationStatistics Valid=267, Invalid=1452, Unknown=3, NotChecked=0, Total=1722 [2022-03-19 04:49:34,877 INFO L912 BasicCegarLoop]: 58 mSDtfsCounter, 55 mSDsluCounter, 711 mSDsCounter, 0 mSdLazyCounter, 956 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 769 SdHoareTripleChecker+Invalid, 1189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 175 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-19 04:49:34,877 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 769 Invalid, 1189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 956 Invalid, 0 Unknown, 175 Unchecked, 0.9s Time] [2022-03-19 04:49:34,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1043 states. [2022-03-19 04:49:35,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1043 to 1011. [2022-03-19 04:49:35,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1011 states, 557 states have (on average 1.2190305206463197) internal successors, (679), 573 states have internal predecessors, (679), 394 states have call successors, (394), 60 states have call predecessors, (394), 59 states have return successors, (392), 377 states have call predecessors, (392), 392 states have call successors, (392) [2022-03-19 04:49:35,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1011 states to 1011 states and 1465 transitions. [2022-03-19 04:49:35,190 INFO L78 Accepts]: Start accepts. Automaton has 1011 states and 1465 transitions. Word has length 138 [2022-03-19 04:49:35,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:49:35,190 INFO L478 AbstractCegarLoop]: Abstraction has 1011 states and 1465 transitions. [2022-03-19 04:49:35,190 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) [2022-03-19 04:49:35,190 INFO L276 IsEmpty]: Start isEmpty. Operand 1011 states and 1465 transitions. [2022-03-19 04:49:35,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-03-19 04:49:35,192 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:49:35,192 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:49:35,211 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 04:49:35,407 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 04:49:35,407 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:49:35,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:49:35,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1937049344, now seen corresponding path program 25 times [2022-03-19 04:49:35,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:49:35,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1372473061] [2022-03-19 04:49:35,408 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:49:35,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1937049344, now seen corresponding path program 26 times [2022-03-19 04:49:35,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:49:35,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768336853] [2022-03-19 04:49:35,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:49:35,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:49:35,414 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:49:35,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1963269678] [2022-03-19 04:49:35,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:49:35,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:49:35,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:49:35,417 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 04:49:35,418 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 04:49:35,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:49:35,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:49:35,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 93 conjunts are in the unsatisfiable core [2022-03-19 04:49:35,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:49:37,945 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 163 proven. 69 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2022-03-19 04:49:37,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:49:47,590 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:49:55,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:49:55,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768336853] [2022-03-19 04:49:55,601 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:49:55,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963269678] [2022-03-19 04:49:55,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963269678] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 04:49:55,601 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 04:49:55,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2022-03-19 04:49:55,601 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:49:55,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1372473061] [2022-03-19 04:49:55,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1372473061] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:49:55,602 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:49:55,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-19 04:49:55,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542588040] [2022-03-19 04:49:55,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:49:55,602 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-19 04:49:55,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:49:55,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-19 04:49:55,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=861, Unknown=0, NotChecked=0, Total=992 [2022-03-19 04:49:55,603 INFO L87 Difference]: Start difference. First operand 1011 states and 1465 transitions. Second operand has 21 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) [2022-03-19 04:50:03,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:50:03,816 INFO L93 Difference]: Finished difference Result 1089 states and 1573 transitions. [2022-03-19 04:50:03,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-19 04:50:03,817 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) Word has length 138 [2022-03-19 04:50:03,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:50:03,825 INFO L225 Difference]: With dead ends: 1089 [2022-03-19 04:50:03,826 INFO L226 Difference]: Without dead ends: 1082 [2022-03-19 04:50:03,826 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 161 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 23.0s TimeCoverageRelationStatistics Valid=199, Invalid=1360, Unknown=1, NotChecked=0, Total=1560 [2022-03-19 04:50:03,827 INFO L912 BasicCegarLoop]: 61 mSDtfsCounter, 77 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 688 SdHoareTripleChecker+Invalid, 1173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 316 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:50:03,827 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 688 Invalid, 1173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 770 Invalid, 0 Unknown, 316 Unchecked, 1.1s Time] [2022-03-19 04:50:03,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2022-03-19 04:50:04,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 1040. [2022-03-19 04:50:04,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1040 states, 570 states have (on average 1.2228070175438597) internal successors, (697), 585 states have internal predecessors, (697), 410 states have call successors, (410), 61 states have call predecessors, (410), 59 states have return successors, (408), 393 states have call predecessors, (408), 408 states have call successors, (408) [2022-03-19 04:50:04,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1040 states to 1040 states and 1515 transitions. [2022-03-19 04:50:04,167 INFO L78 Accepts]: Start accepts. Automaton has 1040 states and 1515 transitions. Word has length 138 [2022-03-19 04:50:04,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:50:04,167 INFO L478 AbstractCegarLoop]: Abstraction has 1040 states and 1515 transitions. [2022-03-19 04:50:04,167 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) [2022-03-19 04:50:04,167 INFO L276 IsEmpty]: Start isEmpty. Operand 1040 states and 1515 transitions. [2022-03-19 04:50:04,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-03-19 04:50:04,169 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:50:04,169 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:50:04,188 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 04:50:04,388 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 04:50:04,388 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:50:04,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:50:04,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1588704448, now seen corresponding path program 27 times [2022-03-19 04:50:04,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:50:04,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [980635799] [2022-03-19 04:50:04,389 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:50:04,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1588704448, now seen corresponding path program 28 times [2022-03-19 04:50:04,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:50:04,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500268994] [2022-03-19 04:50:04,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:50:04,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:50:04,394 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:50:04,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [299810988] [2022-03-19 04:50:04,395 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:50:04,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:50:04,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:50:04,397 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 04:50:04,399 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 04:50:04,452 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:50:04,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:50:04,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 96 conjunts are in the unsatisfiable core [2022-03-19 04:50:04,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:50:04,927 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:50:06,300 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:50:06,302 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:50:06,303 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:50:06,305 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:50:06,308 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:50:06,309 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:50:06,312 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:50:25,105 WARN L232 SmtUtils]: Spent 9.62s on a formula simplification. DAG size of input: 128 DAG size of output: 127 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 04:50:57,752 WARN L232 SmtUtils]: Spent 7.00s on a formula simplification that was a NOOP. DAG size: 97 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 04:51:02,448 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 132 proven. 121 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2022-03-19 04:51:02,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:51:12,209 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:51:19,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:51:19,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500268994] [2022-03-19 04:51:19,078 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:51:19,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299810988] [2022-03-19 04:51:19,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299810988] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 04:51:19,079 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 04:51:19,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-03-19 04:51:19,079 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:51:19,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [980635799] [2022-03-19 04:51:19,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [980635799] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:51:19,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:51:19,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-19 04:51:19,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762847512] [2022-03-19 04:51:19,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:51:19,079 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-19 04:51:19,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:51:19,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-19 04:51:19,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=854, Unknown=0, NotChecked=0, Total=992 [2022-03-19 04:51:19,080 INFO L87 Difference]: Start difference. First operand 1040 states and 1515 transitions. Second operand has 23 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 10 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 9 states have call successors, (21) [2022-03-19 04:51:23,715 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 04:51:53,916 WARN L232 SmtUtils]: Spent 20.45s on a formula simplification. DAG size of input: 135 DAG size of output: 100 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 04:51:58,262 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 04:52:02,031 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 04:52:05,910 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 04:52:07,914 WARN L534 Checker$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 04:52:09,917 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 04:52:11,362 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 04:52:11,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:52:11,914 INFO L93 Difference]: Finished difference Result 1157 states and 1676 transitions. [2022-03-19 04:52:11,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-19 04:52:11,916 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 10 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 9 states have call successors, (21) Word has length 138 [2022-03-19 04:52:11,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:52:11,921 INFO L225 Difference]: With dead ends: 1157 [2022-03-19 04:52:11,921 INFO L226 Difference]: Without dead ends: 1154 [2022-03-19 04:52:11,922 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 68.4s TimeCoverageRelationStatistics Valid=222, Invalid=1418, Unknown=0, NotChecked=0, Total=1640 [2022-03-19 04:52:11,922 INFO L912 BasicCegarLoop]: 70 mSDtfsCounter, 90 mSDsluCounter, 837 mSDsCounter, 0 mSdLazyCounter, 1380 mSolverCounterSat, 101 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 907 SdHoareTripleChecker+Invalid, 1486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1380 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.7s IncrementalHoareTripleChecker+Time [2022-03-19 04:52:11,923 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 907 Invalid, 1486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1380 Invalid, 5 Unknown, 0 Unchecked, 25.7s Time] [2022-03-19 04:52:11,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1154 states. [2022-03-19 04:52:12,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1154 to 1049. [2022-03-19 04:52:12,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1049 states, 577 states have (on average 1.2218370883882148) internal successors, (705), 593 states have internal predecessors, (705), 411 states have call successors, (411), 62 states have call predecessors, (411), 60 states have return successors, (409), 393 states have call predecessors, (409), 409 states have call successors, (409) [2022-03-19 04:52:12,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 1525 transitions. [2022-03-19 04:52:12,308 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 1525 transitions. Word has length 138 [2022-03-19 04:52:12,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:52:12,308 INFO L478 AbstractCegarLoop]: Abstraction has 1049 states and 1525 transitions. [2022-03-19 04:52:12,308 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 10 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 9 states have call successors, (21) [2022-03-19 04:52:12,308 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 1525 transitions. [2022-03-19 04:52:12,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-03-19 04:52:12,310 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:52:12,310 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1] [2022-03-19 04:52:12,328 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 04:52:12,519 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 04:52:12,519 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:52:12,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:52:12,520 INFO L85 PathProgramCache]: Analyzing trace with hash -20730755, now seen corresponding path program 29 times [2022-03-19 04:52:12,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:52:12,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1111985711] [2022-03-19 04:52:12,520 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:52:12,520 INFO L85 PathProgramCache]: Analyzing trace with hash -20730755, now seen corresponding path program 30 times [2022-03-19 04:52:12,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:52:12,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789273130] [2022-03-19 04:52:12,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:52:12,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:52:12,526 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:52:12,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1768371598] [2022-03-19 04:52:12,526 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:52:12,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:52:12,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:52:12,528 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:52:12,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-19 04:52:12,617 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-19 04:52:12,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:52:12,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 97 conjunts are in the unsatisfiable core [2022-03-19 04:52:12,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:52:14,128 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:52:14,130 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:52:14,131 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:52:44,644 WARN L232 SmtUtils]: Spent 20.35s on a formula simplification that was a NOOP. DAG size: 81 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 04:52:49,389 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 103 proven. 139 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2022-03-19 04:52:49,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:53:06,905 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:53:06,908 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:53:13,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:53:13,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789273130] [2022-03-19 04:53:13,030 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:53:13,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768371598] [2022-03-19 04:53:13,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768371598] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 04:53:13,030 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 04:53:13,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2022-03-19 04:53:13,030 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:53:13,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1111985711] [2022-03-19 04:53:13,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1111985711] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:53:13,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:53:13,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-19 04:53:13,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704855036] [2022-03-19 04:53:13,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:53:13,031 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-19 04:53:13,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:53:13,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-19 04:53:13,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=852, Unknown=9, NotChecked=0, Total=992 [2022-03-19 04:53:13,032 INFO L87 Difference]: Start difference. First operand 1049 states and 1525 transitions. Second operand has 22 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) [2022-03-19 04:53:47,264 WARN L232 SmtUtils]: Spent 20.83s on a formula simplification. DAG size of input: 105 DAG size of output: 97 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 04:53:49,537 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 04:53:50,639 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 04:53:53,022 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 04:53:55,123 WARN L534 Checker$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 04:53:58,088 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 04:54:00,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:54:00,257 INFO L93 Difference]: Finished difference Result 1172 states and 1688 transitions. [2022-03-19 04:54:00,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-19 04:54:00,258 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) Word has length 141 [2022-03-19 04:54:00,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:54:00,262 INFO L225 Difference]: With dead ends: 1172 [2022-03-19 04:54:00,262 INFO L226 Difference]: Without dead ends: 1165 [2022-03-19 04:54:00,263 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 75.6s TimeCoverageRelationStatistics Valid=178, Invalid=1293, Unknown=11, NotChecked=0, Total=1482 [2022-03-19 04:54:00,263 INFO L912 BasicCegarLoop]: 61 mSDtfsCounter, 67 mSDsluCounter, 883 mSDsCounter, 0 mSdLazyCounter, 1347 mSolverCounterSat, 58 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 944 SdHoareTripleChecker+Invalid, 1407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1347 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.9s IncrementalHoareTripleChecker+Time [2022-03-19 04:54:00,263 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 944 Invalid, 1407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1347 Invalid, 2 Unknown, 0 Unchecked, 16.9s Time] [2022-03-19 04:54:00,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2022-03-19 04:54:00,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 1120. [2022-03-19 04:54:00,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1120 states, 617 states have (on average 1.220421393841167) internal successors, (753), 633 states have internal predecessors, (753), 438 states have call successors, (438), 66 states have call predecessors, (438), 64 states have return successors, (436), 420 states have call predecessors, (436), 436 states have call successors, (436) [2022-03-19 04:54:00,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 1627 transitions. [2022-03-19 04:54:00,670 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 1627 transitions. Word has length 141 [2022-03-19 04:54:00,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:54:00,671 INFO L478 AbstractCegarLoop]: Abstraction has 1120 states and 1627 transitions. [2022-03-19 04:54:00,671 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) [2022-03-19 04:54:00,671 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 1627 transitions. [2022-03-19 04:54:00,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-03-19 04:54:00,672 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:54:00,672 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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 04:54:00,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-19 04:54:00,873 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-03-19 04:54:00,874 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:54:00,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:54:00,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1824189762, now seen corresponding path program 31 times [2022-03-19 04:54:00,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:54:00,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2060749230] [2022-03-19 04:54:00,875 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:54:00,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1824189762, now seen corresponding path program 32 times [2022-03-19 04:54:00,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:54:00,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241118448] [2022-03-19 04:54:00,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:54:00,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:54:00,891 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:54:00,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [47758029] [2022-03-19 04:54:00,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:54:00,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:54:00,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:54:00,895 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:54:00,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-19 04:54:00,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:54:00,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:54:00,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 103 conjunts are in the unsatisfiable core [2022-03-19 04:54:00,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:54:04,362 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 133 proven. 115 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2022-03-19 04:54:04,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:54:05,496 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:54:07,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:54:07,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241118448] [2022-03-19 04:54:07,578 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:54:07,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47758029] [2022-03-19 04:54:07,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47758029] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 04:54:07,578 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 04:54:07,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2022-03-19 04:54:07,579 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:54:07,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2060749230] [2022-03-19 04:54:07,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2060749230] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:54:07,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:54:07,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-19 04:54:07,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852163490] [2022-03-19 04:54:07,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:54:07,579 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-19 04:54:07,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:54:07,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-19 04:54:07,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2022-03-19 04:54:07,580 INFO L87 Difference]: Start difference. First operand 1120 states and 1627 transitions. Second operand has 24 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-03-19 04:54:12,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:54:12,596 INFO L93 Difference]: Finished difference Result 1268 states and 1839 transitions. [2022-03-19 04:54:12,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-19 04:54:12,597 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) Word has length 143 [2022-03-19 04:54:12,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:54:12,602 INFO L225 Difference]: With dead ends: 1268 [2022-03-19 04:54:12,602 INFO L226 Difference]: Without dead ends: 1265 [2022-03-19 04:54:12,603 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=187, Invalid=1535, Unknown=0, NotChecked=0, Total=1722 [2022-03-19 04:54:12,603 INFO L912 BasicCegarLoop]: 74 mSDtfsCounter, 88 mSDsluCounter, 1064 mSDsCounter, 0 mSdLazyCounter, 1734 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 1138 SdHoareTripleChecker+Invalid, 1811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-03-19 04:54:12,603 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 1138 Invalid, 1811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1734 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-03-19 04:54:12,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1265 states. [2022-03-19 04:54:13,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1265 to 1209. [2022-03-19 04:54:13,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1209 states, 661 states have (on average 1.2254160363086233) internal successors, (810), 678 states have internal predecessors, (810), 480 states have call successors, (480), 69 states have call predecessors, (480), 67 states have return successors, (478), 461 states have call predecessors, (478), 478 states have call successors, (478) [2022-03-19 04:54:13,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1209 states to 1209 states and 1768 transitions. [2022-03-19 04:54:13,056 INFO L78 Accepts]: Start accepts. Automaton has 1209 states and 1768 transitions. Word has length 143 [2022-03-19 04:54:13,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:54:13,057 INFO L478 AbstractCegarLoop]: Abstraction has 1209 states and 1768 transitions. [2022-03-19 04:54:13,057 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-03-19 04:54:13,057 INFO L276 IsEmpty]: Start isEmpty. Operand 1209 states and 1768 transitions. [2022-03-19 04:54:13,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-03-19 04:54:13,058 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:54:13,059 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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 04:54:13,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-19 04:54:13,271 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-03-19 04:54:13,271 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:54:13,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:54:13,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1701564030, now seen corresponding path program 33 times [2022-03-19 04:54:13,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:54:13,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1605623039] [2022-03-19 04:54:13,272 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:54:13,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1701564030, now seen corresponding path program 34 times [2022-03-19 04:54:13,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:54:13,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615712065] [2022-03-19 04:54:13,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:54:13,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:54:13,278 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:54:13,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1259783646] [2022-03-19 04:54:13,279 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:54:13,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:54:13,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:54:13,280 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:54:13,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-19 04:54:13,338 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:54:13,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:54:13,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 108 conjunts are in the unsatisfiable core [2022-03-19 04:54:13,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:54:14,736 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 147 proven. 122 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2022-03-19 04:54:14,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:54:15,177 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:54:17,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:54:17,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615712065] [2022-03-19 04:54:17,445 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:54:17,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259783646] [2022-03-19 04:54:17,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259783646] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 04:54:17,445 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 04:54:17,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-03-19 04:54:17,445 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:54:17,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1605623039] [2022-03-19 04:54:17,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1605623039] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:54:17,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:54:17,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-19 04:54:17,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841742450] [2022-03-19 04:54:17,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:54:17,446 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-19 04:54:17,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:54:17,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-19 04:54:17,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2022-03-19 04:54:17,446 INFO L87 Difference]: Start difference. First operand 1209 states and 1768 transitions. Second operand has 23 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 20 states have internal predecessors, (48), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) [2022-03-19 04:54:20,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:54:20,758 INFO L93 Difference]: Finished difference Result 1401 states and 2038 transitions. [2022-03-19 04:54:20,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-19 04:54:20,760 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 20 states have internal predecessors, (48), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) Word has length 143 [2022-03-19 04:54:20,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:54:20,765 INFO L225 Difference]: With dead ends: 1401 [2022-03-19 04:54:20,765 INFO L226 Difference]: Without dead ends: 1398 [2022-03-19 04:54:20,766 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 133 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=173, Invalid=1549, Unknown=0, NotChecked=0, Total=1722 [2022-03-19 04:54:20,766 INFO L912 BasicCegarLoop]: 79 mSDtfsCounter, 92 mSDsluCounter, 1340 mSDsCounter, 0 mSdLazyCounter, 2142 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 1419 SdHoareTripleChecker+Invalid, 2236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 2142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-19 04:54:20,766 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 1419 Invalid, 2236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 2142 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-19 04:54:20,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1398 states. [2022-03-19 04:54:21,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1398 to 1254. [2022-03-19 04:54:21,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1254 states, 688 states have (on average 1.2223837209302326) internal successors, (841), 706 states have internal predecessors, (841), 494 states have call successors, (494), 73 states have call predecessors, (494), 71 states have return successors, (492), 474 states have call predecessors, (492), 492 states have call successors, (492) [2022-03-19 04:54:21,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1254 states to 1254 states and 1827 transitions. [2022-03-19 04:54:21,255 INFO L78 Accepts]: Start accepts. Automaton has 1254 states and 1827 transitions. Word has length 143 [2022-03-19 04:54:21,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:54:21,255 INFO L478 AbstractCegarLoop]: Abstraction has 1254 states and 1827 transitions. [2022-03-19 04:54:21,255 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 20 states have internal predecessors, (48), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) [2022-03-19 04:54:21,256 INFO L276 IsEmpty]: Start isEmpty. Operand 1254 states and 1827 transitions. [2022-03-19 04:54:21,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-03-19 04:54:21,257 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:54:21,257 INFO L500 BasicCegarLoop]: trace histogram [18, 17, 17, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 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 04:54:21,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-19 04:54:21,477 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-03-19 04:54:21,477 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:54:21,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:54:21,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1105634999, now seen corresponding path program 7 times [2022-03-19 04:54:21,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:54:21,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1626560713] [2022-03-19 04:54:21,478 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:54:21,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1105634999, now seen corresponding path program 8 times [2022-03-19 04:54:21,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:54:21,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230144877] [2022-03-19 04:54:21,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:54:21,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:54:21,484 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:54:21,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1300670410] [2022-03-19 04:54:21,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:54:21,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:54:21,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:54:21,486 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:54:21,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-19 04:54:21,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:54:21,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:54:21,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 111 conjunts are in the unsatisfiable core [2022-03-19 04:54:21,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:54:24,808 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:54:25,289 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:54:25,302 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:54:25,305 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:54:25,309 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:54:25,312 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:54:29,460 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:54:30,650 INFO L134 CoverageAnalysis]: Checked inductivity of 678 backedges. 161 proven. 138 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2022-03-19 04:54:30,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:54:36,948 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:54:36,952 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:54:50,414 INFO L134 CoverageAnalysis]: Checked inductivity of 678 backedges. 183 proven. 103 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2022-03-19 04:54:50,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:54:50,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230144877] [2022-03-19 04:54:50,415 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:54:50,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300670410] [2022-03-19 04:54:50,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300670410] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:54:50,415 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:54:50,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 18] total 37 [2022-03-19 04:54:50,415 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:54:50,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1626560713] [2022-03-19 04:54:50,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1626560713] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:54:50,415 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:54:50,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-19 04:54:50,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305397440] [2022-03-19 04:54:50,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:54:50,416 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-19 04:54:50,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:54:50,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-19 04:54:50,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=1104, Unknown=1, NotChecked=0, Total=1332 [2022-03-19 04:54:50,417 INFO L87 Difference]: Start difference. First operand 1254 states and 1827 transitions. Second operand has 24 states, 23 states have (on average 2.130434782608696) internal successors, (49), 19 states have internal predecessors, (49), 9 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) [2022-03-19 04:54:57,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:54:57,757 INFO L93 Difference]: Finished difference Result 1366 states and 1977 transitions. [2022-03-19 04:54:57,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-19 04:54:57,759 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.130434782608696) internal successors, (49), 19 states have internal predecessors, (49), 9 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) Word has length 146 [2022-03-19 04:54:57,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:54:57,764 INFO L225 Difference]: With dead ends: 1366 [2022-03-19 04:54:57,764 INFO L226 Difference]: Without dead ends: 1364 [2022-03-19 04:54:57,765 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 253 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=295, Invalid=1596, Unknown=1, NotChecked=0, Total=1892 [2022-03-19 04:54:57,765 INFO L912 BasicCegarLoop]: 63 mSDtfsCounter, 90 mSDsluCounter, 686 mSDsCounter, 0 mSdLazyCounter, 1413 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 749 SdHoareTripleChecker+Invalid, 1495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-03-19 04:54:57,765 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 749 Invalid, 1495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1413 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-03-19 04:54:57,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1364 states. [2022-03-19 04:54:58,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1364 to 1320. [2022-03-19 04:54:58,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1320 states, 724 states have (on average 1.2223756906077348) internal successors, (885), 743 states have internal predecessors, (885), 520 states have call successors, (520), 77 states have call predecessors, (520), 75 states have return successors, (518), 499 states have call predecessors, (518), 518 states have call successors, (518) [2022-03-19 04:54:58,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 1923 transitions. [2022-03-19 04:54:58,274 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 1923 transitions. Word has length 146 [2022-03-19 04:54:58,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:54:58,274 INFO L478 AbstractCegarLoop]: Abstraction has 1320 states and 1923 transitions. [2022-03-19 04:54:58,274 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.130434782608696) internal successors, (49), 19 states have internal predecessors, (49), 9 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) [2022-03-19 04:54:58,274 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 1923 transitions. [2022-03-19 04:54:58,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-03-19 04:54:58,275 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:54:58,282 INFO L500 BasicCegarLoop]: trace histogram [18, 17, 17, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 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 04:54:58,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-19 04:54:58,489 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:54:58,489 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:54:58,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:54:58,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1351700721, now seen corresponding path program 9 times [2022-03-19 04:54:58,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:54:58,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1162696124] [2022-03-19 04:54:58,490 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:54:58,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1351700721, now seen corresponding path program 10 times [2022-03-19 04:54:58,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:54:58,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002639280] [2022-03-19 04:54:58,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:54:58,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:54:58,495 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:54:58,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1440936971] [2022-03-19 04:54:58,495 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:54:58,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:54:58,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:54:58,509 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:54:58,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-19 04:54:58,574 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:54:58,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:54:58,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 101 conjunts are in the unsatisfiable core [2022-03-19 04:54:58,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:54:59,863 INFO L134 CoverageAnalysis]: Checked inductivity of 678 backedges. 154 proven. 154 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2022-03-19 04:54:59,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:55:08,533 INFO L134 CoverageAnalysis]: Checked inductivity of 678 backedges. 200 proven. 22 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2022-03-19 04:55:08,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:55:08,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002639280] [2022-03-19 04:55:08,533 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:55:08,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440936971] [2022-03-19 04:55:08,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440936971] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:55:08,533 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:55:08,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 13] total 29 [2022-03-19 04:55:08,534 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:55:08,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1162696124] [2022-03-19 04:55:08,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1162696124] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:55:08,534 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:55:08,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-19 04:55:08,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527760140] [2022-03-19 04:55:08,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:55:08,534 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-19 04:55:08,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:55:08,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-19 04:55:08,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2022-03-19 04:55:08,535 INFO L87 Difference]: Start difference. First operand 1320 states and 1923 transitions. Second operand has 21 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 10 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 9 states have call successors, (22) [2022-03-19 04:55:09,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:55:09,986 INFO L93 Difference]: Finished difference Result 1423 states and 2066 transitions. [2022-03-19 04:55:09,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-19 04:55:09,987 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 10 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 9 states have call successors, (22) Word has length 146 [2022-03-19 04:55:09,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:55:09,992 INFO L225 Difference]: With dead ends: 1423 [2022-03-19 04:55:09,992 INFO L226 Difference]: Without dead ends: 1421 [2022-03-19 04:55:09,993 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 260 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=200, Invalid=922, Unknown=0, NotChecked=0, Total=1122 [2022-03-19 04:55:09,993 INFO L912 BasicCegarLoop]: 67 mSDtfsCounter, 65 mSDsluCounter, 832 mSDsCounter, 0 mSdLazyCounter, 1276 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 899 SdHoareTripleChecker+Invalid, 1336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 04:55:09,993 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 899 Invalid, 1336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1276 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-19 04:55:09,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1421 states. [2022-03-19 04:55:10,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1421 to 1377. [2022-03-19 04:55:10,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1377 states, 752 states have (on average 1.2247340425531914) internal successors, (921), 773 states have internal predecessors, (921), 546 states have call successors, (546), 79 states have call predecessors, (546), 78 states have return successors, (544), 524 states have call predecessors, (544), 544 states have call successors, (544) [2022-03-19 04:55:10,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1377 states to 1377 states and 2011 transitions. [2022-03-19 04:55:10,555 INFO L78 Accepts]: Start accepts. Automaton has 1377 states and 2011 transitions. Word has length 146 [2022-03-19 04:55:10,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:55:10,556 INFO L478 AbstractCegarLoop]: Abstraction has 1377 states and 2011 transitions. [2022-03-19 04:55:10,556 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 10 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 9 states have call successors, (22) [2022-03-19 04:55:10,556 INFO L276 IsEmpty]: Start isEmpty. Operand 1377 states and 2011 transitions. [2022-03-19 04:55:10,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-03-19 04:55:10,558 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:55:10,558 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:55:10,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-19 04:55:10,771 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-19 04:55:10,771 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:55:10,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:55:10,772 INFO L85 PathProgramCache]: Analyzing trace with hash -780316161, now seen corresponding path program 35 times [2022-03-19 04:55:10,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:55:10,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [598245478] [2022-03-19 04:55:10,772 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:55:10,772 INFO L85 PathProgramCache]: Analyzing trace with hash -780316161, now seen corresponding path program 36 times [2022-03-19 04:55:10,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:55:10,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724633703] [2022-03-19 04:55:10,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:55:10,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:55:10,777 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:55:10,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1395226576] [2022-03-19 04:55:10,778 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:55:10,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:55:10,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:55:10,782 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:55:10,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-19 04:55:11,116 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-19 04:55:11,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:55:11,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 111 conjunts are in the unsatisfiable core [2022-03-19 04:55:11,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:55:14,053 INFO L134 CoverageAnalysis]: Checked inductivity of 620 backedges. 48 proven. 161 refuted. 0 times theorem prover too weak. 411 trivial. 0 not checked. [2022-03-19 04:55:14,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:55:18,540 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:55:26,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:55:26,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724633703] [2022-03-19 04:55:26,712 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:55:26,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395226576] [2022-03-19 04:55:26,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395226576] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 04:55:26,713 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 04:55:26,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2022-03-19 04:55:26,713 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:55:26,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [598245478] [2022-03-19 04:55:26,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [598245478] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:55:26,713 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:55:26,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-19 04:55:26,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186957296] [2022-03-19 04:55:26,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:55:26,713 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-19 04:55:26,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:55:26,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-19 04:55:26,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1521, Unknown=1, NotChecked=0, Total=1722 [2022-03-19 04:55:26,714 INFO L87 Difference]: Start difference. First operand 1377 states and 2011 transitions. Second operand has 27 states, 26 states have (on average 2.076923076923077) internal successors, (54), 24 states have internal predecessors, (54), 9 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 04:55:31,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:55:31,914 INFO L93 Difference]: Finished difference Result 1507 states and 2183 transitions. [2022-03-19 04:55:31,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-19 04:55:31,916 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.076923076923077) internal successors, (54), 24 states have internal predecessors, (54), 9 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 146 [2022-03-19 04:55:31,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:55:31,921 INFO L225 Difference]: With dead ends: 1507 [2022-03-19 04:55:31,922 INFO L226 Difference]: Without dead ends: 1504 [2022-03-19 04:55:31,923 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 192 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=403, Invalid=3018, Unknown=1, NotChecked=0, Total=3422 [2022-03-19 04:55:31,923 INFO L912 BasicCegarLoop]: 64 mSDtfsCounter, 111 mSDsluCounter, 1018 mSDsCounter, 0 mSdLazyCounter, 1822 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 1082 SdHoareTripleChecker+Invalid, 1923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-03-19 04:55:31,923 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 1082 Invalid, 1923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1822 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-03-19 04:55:31,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1504 states. [2022-03-19 04:55:32,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1504 to 1395. [2022-03-19 04:55:32,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1395 states, 765 states have (on average 1.2209150326797387) internal successors, (934), 785 states have internal predecessors, (934), 548 states have call successors, (548), 82 states have call predecessors, (548), 81 states have return successors, (546), 527 states have call predecessors, (546), 546 states have call successors, (546) [2022-03-19 04:55:32,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1395 states to 1395 states and 2028 transitions. [2022-03-19 04:55:32,499 INFO L78 Accepts]: Start accepts. Automaton has 1395 states and 2028 transitions. Word has length 146 [2022-03-19 04:55:32,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:55:32,499 INFO L478 AbstractCegarLoop]: Abstraction has 1395 states and 2028 transitions. [2022-03-19 04:55:32,499 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.076923076923077) internal successors, (54), 24 states have internal predecessors, (54), 9 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 04:55:32,499 INFO L276 IsEmpty]: Start isEmpty. Operand 1395 states and 2028 transitions. [2022-03-19 04:55:32,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-03-19 04:55:32,501 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:55:32,501 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:55:32,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-19 04:55:32,701 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-19 04:55:32,702 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:55:32,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:55:32,702 INFO L85 PathProgramCache]: Analyzing trace with hash 829249481, now seen corresponding path program 37 times [2022-03-19 04:55:32,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:55:32,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [789052082] [2022-03-19 04:55:32,703 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:55:32,703 INFO L85 PathProgramCache]: Analyzing trace with hash 829249481, now seen corresponding path program 38 times [2022-03-19 04:55:32,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:55:32,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161287946] [2022-03-19 04:55:32,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:55:32,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:55:32,709 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:55:32,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [397861809] [2022-03-19 04:55:32,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:55:32,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:55:32,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:55:32,710 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:55:32,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-19 04:55:32,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:55:32,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:55:32,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 117 conjunts are in the unsatisfiable core [2022-03-19 04:55:32,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:55:34,089 INFO L134 CoverageAnalysis]: Checked inductivity of 620 backedges. 142 proven. 118 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2022-03-19 04:55:34,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:55:34,865 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:55:37,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:55:37,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161287946] [2022-03-19 04:55:37,508 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:55:37,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397861809] [2022-03-19 04:55:37,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397861809] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 04:55:37,508 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 04:55:37,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2022-03-19 04:55:37,508 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:55:37,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [789052082] [2022-03-19 04:55:37,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [789052082] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:55:37,508 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:55:37,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-19 04:55:37,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786486221] [2022-03-19 04:55:37,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:55:37,509 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-19 04:55:37,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:55:37,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-19 04:55:37,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2022-03-19 04:55:37,509 INFO L87 Difference]: Start difference. First operand 1395 states and 2028 transitions. Second operand has 22 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) [2022-03-19 04:55:42,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:55:42,051 INFO L93 Difference]: Finished difference Result 1586 states and 2297 transitions. [2022-03-19 04:55:42,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-19 04:55:42,053 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) Word has length 146 [2022-03-19 04:55:42,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:55:42,059 INFO L225 Difference]: With dead ends: 1586 [2022-03-19 04:55:42,059 INFO L226 Difference]: Without dead ends: 1583 [2022-03-19 04:55:42,059 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 137 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=191, Invalid=1615, Unknown=0, NotChecked=0, Total=1806 [2022-03-19 04:55:42,060 INFO L912 BasicCegarLoop]: 66 mSDtfsCounter, 99 mSDsluCounter, 1082 mSDsCounter, 0 mSdLazyCounter, 1816 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 1148 SdHoareTripleChecker+Invalid, 1925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:55:42,060 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 1148 Invalid, 1925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1816 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-03-19 04:55:42,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1583 states. [2022-03-19 04:55:42,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1583 to 1528. [2022-03-19 04:55:42,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1528 states, 838 states have (on average 1.2219570405727924) internal successors, (1024), 861 states have internal predecessors, (1024), 602 states have call successors, (602), 88 states have call predecessors, (602), 87 states have return successors, (600), 578 states have call predecessors, (600), 600 states have call successors, (600) [2022-03-19 04:55:42,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1528 states to 1528 states and 2226 transitions. [2022-03-19 04:55:42,689 INFO L78 Accepts]: Start accepts. Automaton has 1528 states and 2226 transitions. Word has length 146 [2022-03-19 04:55:42,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:55:42,690 INFO L478 AbstractCegarLoop]: Abstraction has 1528 states and 2226 transitions. [2022-03-19 04:55:42,690 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) [2022-03-19 04:55:42,690 INFO L276 IsEmpty]: Start isEmpty. Operand 1528 states and 2226 transitions. [2022-03-19 04:55:42,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-03-19 04:55:42,692 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:55:42,692 INFO L500 BasicCegarLoop]: trace histogram [18, 17, 17, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-03-19 04:55:42,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-19 04:55:42,906 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-19 04:55:42,907 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:55:42,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:55:42,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1464953460, now seen corresponding path program 11 times [2022-03-19 04:55:42,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:55:42,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [447802809] [2022-03-19 04:55:42,908 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:55:42,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1464953460, now seen corresponding path program 12 times [2022-03-19 04:55:42,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:55:42,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307425832] [2022-03-19 04:55:42,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:55:42,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:55:42,914 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:55:42,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1885940177] [2022-03-19 04:55:42,915 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:55:42,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:55:42,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:55:42,916 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:55:42,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-19 04:55:43,006 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-19 04:55:43,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:55:43,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 96 conjunts are in the unsatisfiable core [2022-03-19 04:55:43,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:55:44,263 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 100 proven. 148 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2022-03-19 04:55:44,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:55:46,197 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 106 proven. 142 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2022-03-19 04:55:46,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:55:46,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307425832] [2022-03-19 04:55:46,197 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:55:46,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885940177] [2022-03-19 04:55:46,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885940177] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:55:46,198 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:55:46,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 36 [2022-03-19 04:55:46,198 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:55:46,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [447802809] [2022-03-19 04:55:46,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [447802809] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:55:46,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:55:46,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-19 04:55:46,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752407905] [2022-03-19 04:55:46,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:55:46,198 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-19 04:55:46,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:55:46,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-19 04:55:46,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1034, Unknown=0, NotChecked=0, Total=1260 [2022-03-19 04:55:46,199 INFO L87 Difference]: Start difference. First operand 1528 states and 2226 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2022-03-19 04:55:47,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:55:47,723 INFO L93 Difference]: Finished difference Result 1582 states and 2286 transitions. [2022-03-19 04:55:47,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-19 04:55:47,724 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) Word has length 149 [2022-03-19 04:55:47,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:55:47,729 INFO L225 Difference]: With dead ends: 1582 [2022-03-19 04:55:47,729 INFO L226 Difference]: Without dead ends: 1580 [2022-03-19 04:55:47,729 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 261 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=305, Invalid=1417, Unknown=0, NotChecked=0, Total=1722 [2022-03-19 04:55:47,730 INFO L912 BasicCegarLoop]: 60 mSDtfsCounter, 76 mSDsluCounter, 669 mSDsCounter, 0 mSdLazyCounter, 1069 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 729 SdHoareTripleChecker+Invalid, 1178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 04:55:47,730 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 729 Invalid, 1178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1069 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 04:55:47,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1580 states. [2022-03-19 04:55:48,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1580 to 1541. [2022-03-19 04:55:48,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1541 states, 847 states have (on average 1.219598583234947) internal successors, (1033), 870 states have internal predecessors, (1033), 603 states have call successors, (603), 91 states have call predecessors, (603), 90 states have return successors, (601), 579 states have call predecessors, (601), 601 states have call successors, (601) [2022-03-19 04:55:48,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1541 states to 1541 states and 2237 transitions. [2022-03-19 04:55:48,393 INFO L78 Accepts]: Start accepts. Automaton has 1541 states and 2237 transitions. Word has length 149 [2022-03-19 04:55:48,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:55:48,393 INFO L478 AbstractCegarLoop]: Abstraction has 1541 states and 2237 transitions. [2022-03-19 04:55:48,393 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2022-03-19 04:55:48,393 INFO L276 IsEmpty]: Start isEmpty. Operand 1541 states and 2237 transitions. [2022-03-19 04:55:48,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-03-19 04:55:48,395 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:55:48,395 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 7, 5, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1] [2022-03-19 04:55:48,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-19 04:55:48,607 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-03-19 04:55:48,607 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:55:48,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:55:48,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1748446329, now seen corresponding path program 39 times [2022-03-19 04:55:48,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:55:48,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [496418662] [2022-03-19 04:55:48,608 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:55:48,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1748446329, now seen corresponding path program 40 times [2022-03-19 04:55:48,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:55:48,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965987150] [2022-03-19 04:55:48,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:55:48,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:55:48,613 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:55:48,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2036542728] [2022-03-19 04:55:48,613 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:55:48,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:55:48,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:55:48,615 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:55:48,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-19 04:55:48,701 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:55:48,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:55:48,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 127 conjunts are in the unsatisfiable core [2022-03-19 04:55:48,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:55:51,049 INFO L134 CoverageAnalysis]: Checked inductivity of 643 backedges. 100 proven. 183 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2022-03-19 04:55:51,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:55:53,265 INFO L134 CoverageAnalysis]: Checked inductivity of 643 backedges. 159 proven. 22 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2022-03-19 04:55:53,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:55:53,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965987150] [2022-03-19 04:55:53,266 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:55:53,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036542728] [2022-03-19 04:55:53,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036542728] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:55:53,266 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:55:53,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 14] total 36 [2022-03-19 04:55:53,266 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:55:53,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [496418662] [2022-03-19 04:55:53,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [496418662] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:55:53,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:55:53,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-19 04:55:53,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395918711] [2022-03-19 04:55:53,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:55:53,267 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-19 04:55:53,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:55:53,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-19 04:55:53,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1129, Unknown=0, NotChecked=0, Total=1260 [2022-03-19 04:55:53,268 INFO L87 Difference]: Start difference. First operand 1541 states and 2237 transitions. Second operand has 27 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 10 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 9 states have call successors, (21) [2022-03-19 04:55:58,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:55:58,614 INFO L93 Difference]: Finished difference Result 1737 states and 2514 transitions. [2022-03-19 04:55:58,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-19 04:55:58,616 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 10 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 9 states have call successors, (21) Word has length 151 [2022-03-19 04:55:58,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:55:58,621 INFO L225 Difference]: With dead ends: 1737 [2022-03-19 04:55:58,621 INFO L226 Difference]: Without dead ends: 1734 [2022-03-19 04:55:58,622 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 266 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=213, Invalid=1949, Unknown=0, NotChecked=0, Total=2162 [2022-03-19 04:55:58,622 INFO L912 BasicCegarLoop]: 73 mSDtfsCounter, 118 mSDsluCounter, 1084 mSDsCounter, 0 mSdLazyCounter, 1960 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 1157 SdHoareTripleChecker+Invalid, 2071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-03-19 04:55:58,622 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 1157 Invalid, 2071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1960 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-03-19 04:55:58,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2022-03-19 04:55:59,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1615. [2022-03-19 04:55:59,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1615 states, 890 states have (on average 1.2191011235955056) internal successors, (1085), 915 states have internal predecessors, (1085), 630 states have call successors, (630), 95 states have call predecessors, (630), 94 states have return successors, (628), 604 states have call predecessors, (628), 628 states have call successors, (628) [2022-03-19 04:55:59,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1615 states to 1615 states and 2343 transitions. [2022-03-19 04:55:59,318 INFO L78 Accepts]: Start accepts. Automaton has 1615 states and 2343 transitions. Word has length 151 [2022-03-19 04:55:59,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:55:59,318 INFO L478 AbstractCegarLoop]: Abstraction has 1615 states and 2343 transitions. [2022-03-19 04:55:59,319 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 10 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 9 states have call successors, (21) [2022-03-19 04:55:59,319 INFO L276 IsEmpty]: Start isEmpty. Operand 1615 states and 2343 transitions. [2022-03-19 04:55:59,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-03-19 04:55:59,321 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:55:59,321 INFO L500 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 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, 1, 1, 1] [2022-03-19 04:55:59,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-19 04:55:59,527 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:55:59,527 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:55:59,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:55:59,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1293461113, now seen corresponding path program 41 times [2022-03-19 04:55:59,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:55:59,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [600101430] [2022-03-19 04:55:59,528 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:55:59,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1293461113, now seen corresponding path program 42 times [2022-03-19 04:55:59,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:55:59,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151174501] [2022-03-19 04:55:59,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:55:59,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:55:59,536 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:55:59,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1927924246] [2022-03-19 04:55:59,537 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:55:59,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:55:59,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:55:59,538 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:55:59,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-19 04:55:59,609 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-03-19 04:55:59,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:55:59,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 88 conjunts are in the unsatisfiable core [2022-03-19 04:55:59,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:56:01,363 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:56:01,367 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:56:01,380 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:56:09,428 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 152 proven. 182 refuted. 0 times theorem prover too weak. 559 trivial. 0 not checked. [2022-03-19 04:56:09,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:56:10,300 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:56:11,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:56:11,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151174501] [2022-03-19 04:56:11,672 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:56:11,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927924246] [2022-03-19 04:56:11,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927924246] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 04:56:11,672 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 04:56:11,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-03-19 04:56:11,673 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:56:11,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [600101430] [2022-03-19 04:56:11,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [600101430] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:56:11,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:56:11,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-19 04:56:11,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975862897] [2022-03-19 04:56:11,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:56:11,673 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-19 04:56:11,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:56:11,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-19 04:56:11,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2022-03-19 04:56:11,674 INFO L87 Difference]: Start difference. First operand 1615 states and 2343 transitions. Second operand has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 8 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 9 states have call predecessors, (25), 7 states have call successors, (25) [2022-03-19 04:56:15,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:56:15,169 INFO L93 Difference]: Finished difference Result 1654 states and 2388 transitions. [2022-03-19 04:56:15,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-19 04:56:15,170 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 8 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 9 states have call predecessors, (25), 7 states have call successors, (25) Word has length 155 [2022-03-19 04:56:15,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:56:15,174 INFO L225 Difference]: With dead ends: 1654 [2022-03-19 04:56:15,174 INFO L226 Difference]: Without dead ends: 1647 [2022-03-19 04:56:15,175 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 162 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=166, Invalid=890, Unknown=0, NotChecked=0, Total=1056 [2022-03-19 04:56:15,175 INFO L912 BasicCegarLoop]: 57 mSDtfsCounter, 57 mSDsluCounter, 696 mSDsCounter, 0 mSdLazyCounter, 760 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 753 SdHoareTripleChecker+Invalid, 1106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 280 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:56:15,175 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 753 Invalid, 1106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 760 Invalid, 0 Unknown, 280 Unchecked, 1.1s Time] [2022-03-19 04:56:15,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1647 states. [2022-03-19 04:56:15,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1647 to 1621. [2022-03-19 04:56:15,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1621 states, 896 states have (on average 1.21875) internal successors, (1092), 921 states have internal predecessors, (1092), 630 states have call successors, (630), 95 states have call predecessors, (630), 94 states have return successors, (628), 604 states have call predecessors, (628), 628 states have call successors, (628) [2022-03-19 04:56:15,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 2350 transitions. [2022-03-19 04:56:15,868 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 2350 transitions. Word has length 155 [2022-03-19 04:56:15,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:56:15,868 INFO L478 AbstractCegarLoop]: Abstraction has 1621 states and 2350 transitions. [2022-03-19 04:56:15,868 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 8 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 9 states have call predecessors, (25), 7 states have call successors, (25) [2022-03-19 04:56:15,869 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 2350 transitions. [2022-03-19 04:56:15,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-03-19 04:56:15,870 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:56:15,870 INFO L500 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 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, 1, 1, 1] [2022-03-19 04:56:15,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-19 04:56:16,071 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:56:16,071 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:56:16,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:56:16,071 INFO L85 PathProgramCache]: Analyzing trace with hash -739148827, now seen corresponding path program 43 times [2022-03-19 04:56:16,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:56:16,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1840381801] [2022-03-19 04:56:16,072 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:56:16,072 INFO L85 PathProgramCache]: Analyzing trace with hash -739148827, now seen corresponding path program 44 times [2022-03-19 04:56:16,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:56:16,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51801294] [2022-03-19 04:56:16,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:56:16,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:56:16,077 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:56:16,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [170696321] [2022-03-19 04:56:16,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:56:16,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:56:16,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:56:16,078 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:56:16,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-19 04:56:16,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:56:16,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:56:16,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 83 conjunts are in the unsatisfiable core [2022-03-19 04:56:16,142 INFO L286 TraceCheckSpWp]: Computing forward predicates...