/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 04:56:51,248 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 04:56:51,251 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 04:56:51,276 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 04:56:51,276 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 04:56:51,277 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 04:56:51,279 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 04:56:51,280 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 04:56:51,281 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 04:56:51,282 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 04:56:51,283 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 04:56:51,284 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 04:56:51,284 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 04:56:51,285 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 04:56:51,286 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 04:56:51,287 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 04:56:51,287 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 04:56:51,288 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 04:56:51,289 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 04:56:51,291 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 04:56:51,292 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 04:56:51,293 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 04:56:51,293 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 04:56:51,294 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 04:56:51,295 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 04:56:51,297 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 04:56:51,304 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 04:56:51,304 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 04:56:51,310 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 04:56:51,311 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-20 04:56:51,324 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 04:56:51,324 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 04:56:51,326 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 04:56:51,327 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 04:56:51,327 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 04:56:51,327 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 04:56:51,327 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 04:56:51,327 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 04:56:51,327 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 04:56:51,328 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 04:56:51,328 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 04:56:51,328 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 04:56:51,329 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 04:56:51,329 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 04:56:51,329 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 04:56:51,329 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 04:56:51,329 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 04:56:51,329 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 04:56:51,329 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 04:56:51,330 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 04:56:51,330 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 04:56:51,330 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 04:56:51,331 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 04:56:51,523 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 04:56:51,540 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 04:56:51,542 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 04:56:51,543 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 04:56:51,546 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 04:56:51,547 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_valuebound50.c [2022-03-20 04:56:51,623 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ca9c6eff/28340bf446ad4defb62124dfa6f2310e/FLAGd9d303b5b [2022-03-20 04:56:51,995 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 04:56:51,996 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_valuebound50.c [2022-03-20 04:56:52,003 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ca9c6eff/28340bf446ad4defb62124dfa6f2310e/FLAGd9d303b5b [2022-03-20 04:56:52,012 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ca9c6eff/28340bf446ad4defb62124dfa6f2310e [2022-03-20 04:56:52,014 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 04:56:52,015 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 04:56:52,016 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 04:56:52,016 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 04:56:52,018 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 04:56:52,018 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 04:56:52" (1/1) ... [2022-03-20 04:56:52,019 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@100e81ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:56:52, skipping insertion in model container [2022-03-20 04:56:52,019 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 04:56:52" (1/1) ... [2022-03-20 04:56:52,026 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 04:56:52,038 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 04:56:52,218 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_valuebound50.c[588,601] [2022-03-20 04:56:52,263 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 04:56:52,269 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 04:56:52,283 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_valuebound50.c[588,601] [2022-03-20 04:56:52,296 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 04:56:52,310 INFO L208 MainTranslator]: Completed translation [2022-03-20 04:56:52,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:56:52 WrapperNode [2022-03-20 04:56:52,311 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 04:56:52,312 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 04:56:52,312 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 04:56:52,312 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 04:56:52,322 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:56:52" (1/1) ... [2022-03-20 04:56:52,322 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:56:52" (1/1) ... [2022-03-20 04:56:52,329 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:56:52" (1/1) ... [2022-03-20 04:56:52,329 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:56:52" (1/1) ... [2022-03-20 04:56:52,333 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:56:52" (1/1) ... [2022-03-20 04:56:52,342 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:56:52" (1/1) ... [2022-03-20 04:56:52,343 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:56:52" (1/1) ... [2022-03-20 04:56:52,345 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 04:56:52,346 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 04:56:52,346 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 04:56:52,346 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 04:56:52,347 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:56:52" (1/1) ... [2022-03-20 04:56:52,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 04:56:52,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:56:52,380 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 04:56:52,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 04:56:52,419 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 04:56:52,419 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 04:56:52,419 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 04:56:52,419 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 04:56:52,420 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 04:56:52,420 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 04:56:52,420 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 04:56:52,420 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 04:56:52,420 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 04:56:52,420 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 04:56:52,420 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ushort [2022-03-20 04:56:52,420 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 04:56:52,423 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 04:56:52,423 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 04:56:52,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 04:56:52,426 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 04:56:52,426 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 04:56:52,426 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 04:56:52,426 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 04:56:52,426 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 04:56:52,476 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 04:56:52,478 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 04:56:52,583 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 04:56:52,590 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 04:56:52,590 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 04:56:52,591 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 04:56:52 BoogieIcfgContainer [2022-03-20 04:56:52,591 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 04:56:52,592 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 04:56:52,592 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 04:56:52,593 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 04:56:52,597 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 04:56:52" (1/1) ... [2022-03-20 04:56:52,598 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-03-20 04:56:52,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 04:56:52 BasicIcfg [2022-03-20 04:56:52,631 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 04:56:52,632 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 04:56:52,633 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 04:56:52,635 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 04:56:52,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 04:56:52" (1/4) ... [2022-03-20 04:56:52,636 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@485b46e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 04:56:52, skipping insertion in model container [2022-03-20 04:56:52,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:56:52" (2/4) ... [2022-03-20 04:56:52,636 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@485b46e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 04:56:52, skipping insertion in model container [2022-03-20 04:56:52,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 04:56:52" (3/4) ... [2022-03-20 04:56:52,636 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@485b46e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 04:56:52, skipping insertion in model container [2022-03-20 04:56:52,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 04:56:52" (4/4) ... [2022-03-20 04:56:52,637 INFO L111 eAbstractionObserver]: Analyzing ICFG cohencu-ll_valuebound50.cJordan [2022-03-20 04:56:52,641 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-20 04:56:52,641 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 04:56:52,697 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 04:56:52,707 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 04:56:52,707 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 04:56:52,722 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-20 04:56:52,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 04:56:52,738 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:56:52,738 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:56:52,739 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:56:52,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:56:52,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1231486971, now seen corresponding path program 1 times [2022-03-20 04:56:52,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:56:52,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181761054] [2022-03-20 04:56:52,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:56:52,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:56:52,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:56:52,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 04:56:52,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:56:52,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 04:56:52,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:56:52,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 04:56:52,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:56:52,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181761054] [2022-03-20 04:56:52,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181761054] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 04:56:52,960 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 04:56:52,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 04:56:52,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306480968] [2022-03-20 04:56:52,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 04:56:52,965 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 04:56:52,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:56:52,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 04:56:52,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 04:56:52,999 INFO L87 Difference]: Start difference. First operand has 36 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 04:56:53,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:56:53,109 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2022-03-20 04:56:53,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 04:56:53,111 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-03-20 04:56:53,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:56:53,122 INFO L225 Difference]: With dead ends: 36 [2022-03-20 04:56:53,122 INFO L226 Difference]: Without dead ends: 31 [2022-03-20 04:56:53,124 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 04:56:53,130 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 04:56:53,132 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 37 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 04:56:53,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-03-20 04:56:53,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-03-20 04:56:53,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 04:56:53,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2022-03-20 04:56:53,170 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 17 [2022-03-20 04:56:53,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:56:53,171 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2022-03-20 04:56:53,171 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 04:56:53,172 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2022-03-20 04:56:53,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 04:56:53,172 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:56:53,172 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:56:53,173 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 04:56:53,173 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:56:53,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:56:53,175 INFO L85 PathProgramCache]: Analyzing trace with hash -574090659, now seen corresponding path program 1 times [2022-03-20 04:56:53,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:56:53,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205752271] [2022-03-20 04:56:53,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:56:53,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:56:53,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:56:53,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 04:56:53,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:56:53,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 04:56:53,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:56:53,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 04:56:53,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:56:53,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205752271] [2022-03-20 04:56:53,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205752271] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 04:56:53,371 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 04:56:53,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 04:56:53,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434847682] [2022-03-20 04:56:53,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 04:56:53,373 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 04:56:53,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:56:53,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 04:56:53,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 04:56:53,374 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 04:56:53,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:56:53,604 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2022-03-20 04:56:53,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 04:56:53,605 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-03-20 04:56:53,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:56:53,606 INFO L225 Difference]: With dead ends: 35 [2022-03-20 04:56:53,606 INFO L226 Difference]: Without dead ends: 35 [2022-03-20 04:56:53,606 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-20 04:56:53,607 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 22 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 04:56:53,608 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 43 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 04:56:53,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-20 04:56:53,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-03-20 04:56:53,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 04:56:53,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2022-03-20 04:56:53,620 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 17 [2022-03-20 04:56:53,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:56:53,621 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2022-03-20 04:56:53,621 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 04:56:53,621 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2022-03-20 04:56:53,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 04:56:53,622 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:56:53,622 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:56:53,623 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 04:56:53,623 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:56:53,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:56:53,624 INFO L85 PathProgramCache]: Analyzing trace with hash 344526146, now seen corresponding path program 1 times [2022-03-20 04:56:53,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:56:53,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697761010] [2022-03-20 04:56:53,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:56:53,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:56:53,641 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:56:53,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2109155545] [2022-03-20 04:56:53,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:56:53,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:56:53,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:56:53,644 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 04:56:53,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 04:56:53,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:56:53,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 04:56:53,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:56:53,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 04:56:53,796 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 04:56:53,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:56:53,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697761010] [2022-03-20 04:56:53,796 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:56:53,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109155545] [2022-03-20 04:56:53,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109155545] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 04:56:53,797 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 04:56:53,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 04:56:53,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953734857] [2022-03-20 04:56:53,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 04:56:53,798 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 04:56:53,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:56:53,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 04:56:53,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 04:56:53,799 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 04:56:53,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:56:53,861 INFO L93 Difference]: Finished difference Result 52 states and 71 transitions. [2022-03-20 04:56:53,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 04:56:53,862 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-03-20 04:56:53,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:56:53,864 INFO L225 Difference]: With dead ends: 52 [2022-03-20 04:56:53,864 INFO L226 Difference]: Without dead ends: 52 [2022-03-20 04:56:53,864 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 04:56:53,867 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 6 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 04:56:53,868 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 168 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 04:56:53,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-20 04:56:53,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2022-03-20 04:56:53,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 20 states have (on average 1.1) internal successors, (22), 22 states have internal predecessors, (22), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-20 04:56:53,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2022-03-20 04:56:53,880 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 22 [2022-03-20 04:56:53,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:56:53,880 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2022-03-20 04:56:53,880 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 04:56:53,881 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2022-03-20 04:56:53,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-20 04:56:53,881 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:56:53,881 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:56:53,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 04:56:54,087 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:56:54,088 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:56:54,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:56:54,088 INFO L85 PathProgramCache]: Analyzing trace with hash 942277242, now seen corresponding path program 1 times [2022-03-20 04:56:54,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:56:54,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283130038] [2022-03-20 04:56:54,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:56:54,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:56:54,100 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:56:54,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1408868164] [2022-03-20 04:56:54,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:56:54,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:56:54,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:56:54,102 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 04:56:54,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 04:56:54,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:56:54,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 04:56:54,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:56:54,260 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 04:56:54,260 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 04:56:54,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:56:54,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283130038] [2022-03-20 04:56:54,261 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:56:54,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408868164] [2022-03-20 04:56:54,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408868164] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 04:56:54,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 04:56:54,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 04:56:54,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603208590] [2022-03-20 04:56:54,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 04:56:54,267 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 04:56:54,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:56:54,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 04:56:54,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 04:56:54,268 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 04:56:54,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:56:54,309 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2022-03-20 04:56:54,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 04:56:54,309 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2022-03-20 04:56:54,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:56:54,310 INFO L225 Difference]: With dead ends: 56 [2022-03-20 04:56:54,310 INFO L226 Difference]: Without dead ends: 56 [2022-03-20 04:56:54,311 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 04:56:54,312 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 6 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 04:56:54,312 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 165 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 04:56:54,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-20 04:56:54,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2022-03-20 04:56:54,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 24 states have (on average 1.125) internal successors, (27), 26 states have internal predecessors, (27), 21 states have call successors, (21), 7 states have call predecessors, (21), 6 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-20 04:56:54,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2022-03-20 04:56:54,320 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 27 [2022-03-20 04:56:54,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:56:54,320 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2022-03-20 04:56:54,321 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 04:56:54,321 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2022-03-20 04:56:54,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-20 04:56:54,321 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:56:54,321 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:56:54,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 04:56:54,538 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,SelfDestructingSolverStorable3 [2022-03-20 04:56:54,538 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:56:54,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:56:54,539 INFO L85 PathProgramCache]: Analyzing trace with hash -881201762, now seen corresponding path program 1 times [2022-03-20 04:56:54,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:56:54,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751974619] [2022-03-20 04:56:54,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:56:54,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:56:54,549 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:56:54,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [609966336] [2022-03-20 04:56:54,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:56:54,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:56:54,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:56:54,551 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) [2022-03-20 04:56:54,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 04:56:54,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:56:54,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 04:56:54,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:56:54,713 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 04:56:54,713 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 04:56:54,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:56:54,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751974619] [2022-03-20 04:56:54,713 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:56:54,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609966336] [2022-03-20 04:56:54,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609966336] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 04:56:54,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 04:56:54,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 04:56:54,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330571927] [2022-03-20 04:56:54,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 04:56:54,714 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 04:56:54,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:56:54,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 04:56:54,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 04:56:54,715 INFO L87 Difference]: Start difference. First operand 52 states and 67 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 04:56:54,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:56:54,776 INFO L93 Difference]: Finished difference Result 64 states and 80 transitions. [2022-03-20 04:56:54,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 04:56:54,777 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2022-03-20 04:56:54,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:56:54,777 INFO L225 Difference]: With dead ends: 64 [2022-03-20 04:56:54,777 INFO L226 Difference]: Without dead ends: 54 [2022-03-20 04:56:54,778 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 04:56:54,778 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 6 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 04:56:54,779 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 157 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 04:56:54,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-20 04:56:54,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-03-20 04:56:54,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 28 states have internal predecessors, (29), 19 states have call successors, (19), 8 states have call predecessors, (19), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-20 04:56:54,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2022-03-20 04:56:54,786 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 32 [2022-03-20 04:56:54,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:56:54,787 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2022-03-20 04:56:54,787 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 04:56:54,787 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2022-03-20 04:56:54,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-20 04:56:54,789 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:56:54,789 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:56:54,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 04:56:55,011 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:56:55,012 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:56:55,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:56:55,012 INFO L85 PathProgramCache]: Analyzing trace with hash 72164327, now seen corresponding path program 1 times [2022-03-20 04:56:55,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:56:55,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484797943] [2022-03-20 04:56:55,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:56:55,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:56:55,027 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:56:55,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1792624355] [2022-03-20 04:56:55,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:56:55,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:56:55,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:56:55,030 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) [2022-03-20 04:56:55,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 04:56:55,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:56:55,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 04:56:55,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:56:55,264 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-20 04:56:55,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:56:55,414 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-20 04:56:55,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:56:55,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484797943] [2022-03-20 04:56:55,415 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:56:55,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792624355] [2022-03-20 04:56:55,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792624355] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 04:56:55,415 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 04:56:55,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-03-20 04:56:55,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049587480] [2022-03-20 04:56:55,416 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 04:56:55,416 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 04:56:55,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:56:55,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 04:56:55,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-20 04:56:55,417 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-20 04:56:55,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:56:55,668 INFO L93 Difference]: Finished difference Result 75 states and 95 transitions. [2022-03-20 04:56:55,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 04:56:55,669 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 49 [2022-03-20 04:56:55,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:56:55,670 INFO L225 Difference]: With dead ends: 75 [2022-03-20 04:56:55,670 INFO L226 Difference]: Without dead ends: 75 [2022-03-20 04:56:55,671 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-03-20 04:56:55,671 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 9 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 04:56:55,671 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 208 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 04:56:55,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-03-20 04:56:55,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 62. [2022-03-20 04:56:55,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 34 states have internal predecessors, (35), 19 states have call successors, (19), 10 states have call predecessors, (19), 9 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-20 04:56:55,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2022-03-20 04:56:55,677 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 49 [2022-03-20 04:56:55,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:56:55,678 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2022-03-20 04:56:55,678 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-20 04:56:55,678 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2022-03-20 04:56:55,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-20 04:56:55,682 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:56:55,683 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 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] [2022-03-20 04:56:55,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 04:56:55,883 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:56:55,883 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:56:55,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:56:55,884 INFO L85 PathProgramCache]: Analyzing trace with hash 655575797, now seen corresponding path program 2 times [2022-03-20 04:56:55,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:56:55,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283336578] [2022-03-20 04:56:55,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:56:55,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:56:55,894 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:56:55,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [512638055] [2022-03-20 04:56:55,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 04:56:55,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:56:55,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:56:55,899 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) [2022-03-20 04:56:55,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 04:56:55,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 04:56:55,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 04:56:55,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 04:56:55,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:56:56,131 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-20 04:56:56,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:56:56,252 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-20 04:56:56,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:56:56,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283336578] [2022-03-20 04:56:56,253 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:56:56,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512638055] [2022-03-20 04:56:56,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512638055] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 04:56:56,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 04:56:56,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-03-20 04:56:56,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859808053] [2022-03-20 04:56:56,254 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 04:56:56,254 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 04:56:56,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:56:56,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 04:56:56,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-20 04:56:56,255 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-03-20 04:56:56,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:56:56,346 INFO L93 Difference]: Finished difference Result 79 states and 98 transitions. [2022-03-20 04:56:56,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 04:56:56,346 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 54 [2022-03-20 04:56:56,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:56:56,347 INFO L225 Difference]: With dead ends: 79 [2022-03-20 04:56:56,347 INFO L226 Difference]: Without dead ends: 79 [2022-03-20 04:56:56,347 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-20 04:56:56,348 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 7 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 04:56:56,348 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 240 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 04:56:56,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-20 04:56:56,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 70. [2022-03-20 04:56:56,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 37 states have (on average 1.054054054054054) internal successors, (39), 39 states have internal predecessors, (39), 22 states have call successors, (22), 11 states have call predecessors, (22), 10 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2022-03-20 04:56:56,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 81 transitions. [2022-03-20 04:56:56,355 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 81 transitions. Word has length 54 [2022-03-20 04:56:56,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:56:56,355 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 81 transitions. [2022-03-20 04:56:56,355 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-03-20 04:56:56,356 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 81 transitions. [2022-03-20 04:56:56,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-20 04:56:56,357 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:56:56,357 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 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] [2022-03-20 04:56:56,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 04:56:56,563 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:56:56,564 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:56:56,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:56:56,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1963047427, now seen corresponding path program 3 times [2022-03-20 04:56:56,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:56:56,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479193647] [2022-03-20 04:56:56,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:56:56,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:56:56,573 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:56:56,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1106262037] [2022-03-20 04:56:56,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 04:56:56,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:56:56,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:56:56,575 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) [2022-03-20 04:56:56,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 04:56:56,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-20 04:56:56,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 04:56:56,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-20 04:56:56,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:56:56,862 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-20 04:56:56,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:56:57,191 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-20 04:56:57,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:56:57,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479193647] [2022-03-20 04:56:57,191 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:56:57,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106262037] [2022-03-20 04:56:57,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106262037] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 04:56:57,192 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 04:56:57,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-03-20 04:56:57,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512235822] [2022-03-20 04:56:57,192 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 04:56:57,192 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 04:56:57,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:56:57,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 04:56:57,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-20 04:56:57,193 INFO L87 Difference]: Start difference. First operand 70 states and 81 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-03-20 04:56:57,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:56:57,445 INFO L93 Difference]: Finished difference Result 91 states and 107 transitions. [2022-03-20 04:56:57,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 04:56:57,446 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) Word has length 59 [2022-03-20 04:56:57,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:56:57,447 INFO L225 Difference]: With dead ends: 91 [2022-03-20 04:56:57,447 INFO L226 Difference]: Without dead ends: 85 [2022-03-20 04:56:57,447 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-03-20 04:56:57,448 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 8 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 04:56:57,448 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 212 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 04:56:57,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-03-20 04:56:57,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 79. [2022-03-20 04:56:57,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 48 states have internal predecessors, (48), 19 states have call successors, (19), 14 states have call predecessors, (19), 13 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-20 04:56:57,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 84 transitions. [2022-03-20 04:56:57,454 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 84 transitions. Word has length 59 [2022-03-20 04:56:57,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:56:57,454 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 84 transitions. [2022-03-20 04:56:57,455 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-03-20 04:56:57,455 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 84 transitions. [2022-03-20 04:56:57,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-20 04:56:57,456 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:56:57,456 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 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] [2022-03-20 04:56:57,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 04:56:57,669 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:56:57,670 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:56:57,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:56:57,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1897273453, now seen corresponding path program 1 times [2022-03-20 04:56:57,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:56:57,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126708284] [2022-03-20 04:56:57,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:56:57,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:56:57,680 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:56:57,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1332258902] [2022-03-20 04:56:57,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:56:57,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:56:57,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:56:57,682 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) [2022-03-20 04:56:57,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 04:56:57,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:56:57,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-20 04:56:57,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:56:58,066 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-20 04:56:58,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:56:58,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:56:58,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126708284] [2022-03-20 04:56:58,298 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:56:58,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332258902] [2022-03-20 04:56:58,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332258902] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:56:58,298 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 04:56:58,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-03-20 04:56:58,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760301188] [2022-03-20 04:56:58,299 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 04:56:58,299 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 04:56:58,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:56:58,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 04:56:58,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-20 04:56:58,302 INFO L87 Difference]: Start difference. First operand 79 states and 84 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-20 04:56:58,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:56:58,406 INFO L93 Difference]: Finished difference Result 93 states and 101 transitions. [2022-03-20 04:56:58,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 04:56:58,407 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 75 [2022-03-20 04:56:58,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:56:58,411 INFO L225 Difference]: With dead ends: 93 [2022-03-20 04:56:58,411 INFO L226 Difference]: Without dead ends: 93 [2022-03-20 04:56:58,411 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-03-20 04:56:58,413 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 04:56:58,413 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 216 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 04:56:58,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-03-20 04:56:58,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2022-03-20 04:56:58,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 55 states have internal predecessors, (56), 23 states have call successors, (23), 16 states have call predecessors, (23), 15 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-03-20 04:56:58,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 100 transitions. [2022-03-20 04:56:58,430 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 100 transitions. Word has length 75 [2022-03-20 04:56:58,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:56:58,431 INFO L478 AbstractCegarLoop]: Abstraction has 92 states and 100 transitions. [2022-03-20 04:56:58,431 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-20 04:56:58,432 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 100 transitions. [2022-03-20 04:56:58,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-20 04:56:58,436 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:56:58,436 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:56:58,463 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-20 04:56:58,651 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:56:58,652 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:56:58,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:56:58,652 INFO L85 PathProgramCache]: Analyzing trace with hash -994112719, now seen corresponding path program 1 times [2022-03-20 04:56:58,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:56:58,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111359947] [2022-03-20 04:56:58,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:56:58,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:56:58,661 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:56:58,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2097067841] [2022-03-20 04:56:58,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:56:58,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:56:58,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:56:58,670 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) [2022-03-20 04:56:58,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 04:56:58,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:56:58,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-20 04:56:58,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:56:59,401 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 79 proven. 12 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-03-20 04:56:59,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:57:09,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:57:09,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111359947] [2022-03-20 04:57:09,087 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:57:09,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097067841] [2022-03-20 04:57:09,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097067841] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:57:09,087 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 04:57:09,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-03-20 04:57:09,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325968362] [2022-03-20 04:57:09,088 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 04:57:09,088 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 04:57:09,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:57:09,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 04:57:09,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-03-20 04:57:09,089 INFO L87 Difference]: Start difference. First operand 92 states and 100 transitions. Second operand has 15 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 6 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-20 04:57:10,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:57:10,521 INFO L93 Difference]: Finished difference Result 101 states and 107 transitions. [2022-03-20 04:57:10,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 04:57:10,522 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 6 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) Word has length 80 [2022-03-20 04:57:10,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:57:10,523 INFO L225 Difference]: With dead ends: 101 [2022-03-20 04:57:10,523 INFO L226 Difference]: Without dead ends: 90 [2022-03-20 04:57:10,523 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2022-03-20 04:57:10,524 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 19 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 04:57:10,524 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 205 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 04:57:10,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-03-20 04:57:10,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-03-20 04:57:10,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 54 states have internal predecessors, (55), 21 states have call successors, (21), 16 states have call predecessors, (21), 15 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-20 04:57:10,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 95 transitions. [2022-03-20 04:57:10,528 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 95 transitions. Word has length 80 [2022-03-20 04:57:10,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:57:10,528 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 95 transitions. [2022-03-20 04:57:10,528 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 6 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-20 04:57:10,528 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 95 transitions. [2022-03-20 04:57:10,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-03-20 04:57:10,529 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:57:10,529 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 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] [2022-03-20 04:57:10,550 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-03-20 04:57:10,729 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,SelfDestructingSolverStorable9 [2022-03-20 04:57:10,730 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:57:10,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:57:10,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1391751782, now seen corresponding path program 4 times [2022-03-20 04:57:10,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:57:10,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836693091] [2022-03-20 04:57:10,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:57:10,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:57:10,740 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:57:10,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [764216288] [2022-03-20 04:57:10,740 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 04:57:10,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:57:10,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:57:10,741 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) [2022-03-20 04:57:10,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 04:57:10,797 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 04:57:10,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 04:57:10,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-20 04:57:10,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:57:11,065 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 24 proven. 15 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-03-20 04:57:11,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:57:11,272 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 24 proven. 15 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-03-20 04:57:11,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:57:11,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836693091] [2022-03-20 04:57:11,272 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:57:11,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764216288] [2022-03-20 04:57:11,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764216288] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 04:57:11,273 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 04:57:11,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-03-20 04:57:11,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858957924] [2022-03-20 04:57:11,273 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 04:57:11,274 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 04:57:11,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:57:11,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 04:57:11,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-03-20 04:57:11,275 INFO L87 Difference]: Start difference. First operand 90 states and 95 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 7 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (26), 7 states have call predecessors, (26), 7 states have call successors, (26) [2022-03-20 04:57:11,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:57:11,546 INFO L93 Difference]: Finished difference Result 104 states and 116 transitions. [2022-03-20 04:57:11,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 04:57:11,546 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 7 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (26), 7 states have call predecessors, (26), 7 states have call successors, (26) Word has length 81 [2022-03-20 04:57:11,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:57:11,547 INFO L225 Difference]: With dead ends: 104 [2022-03-20 04:57:11,547 INFO L226 Difference]: Without dead ends: 104 [2022-03-20 04:57:11,548 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-20 04:57:11,549 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 12 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 04:57:11,549 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 195 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 04:57:11,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-03-20 04:57:11,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 94. [2022-03-20 04:57:11,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 57 states have internal predecessors, (58), 21 states have call successors, (21), 17 states have call predecessors, (21), 16 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-20 04:57:11,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 98 transitions. [2022-03-20 04:57:11,555 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 98 transitions. Word has length 81 [2022-03-20 04:57:11,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:57:11,555 INFO L478 AbstractCegarLoop]: Abstraction has 94 states and 98 transitions. [2022-03-20 04:57:11,555 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 7 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (26), 7 states have call predecessors, (26), 7 states have call successors, (26) [2022-03-20 04:57:11,555 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 98 transitions. [2022-03-20 04:57:11,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 04:57:11,556 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:57:11,556 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:57:11,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 04:57:11,771 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:57:11,771 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:57:11,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:57:11,772 INFO L85 PathProgramCache]: Analyzing trace with hash 574631438, now seen corresponding path program 2 times [2022-03-20 04:57:11,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:57:11,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889898023] [2022-03-20 04:57:11,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:57:11,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:57:11,780 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:57:11,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1420207839] [2022-03-20 04:57:11,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 04:57:11,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:57:11,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:57:11,782 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) [2022-03-20 04:57:11,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 04:57:11,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 04:57:11,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 04:57:11,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-20 04:57:11,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:57:12,239 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 32 proven. 21 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-03-20 04:57:12,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:57:12,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:57:12,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889898023] [2022-03-20 04:57:12,414 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:57:12,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420207839] [2022-03-20 04:57:12,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420207839] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:57:12,414 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 04:57:12,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-03-20 04:57:12,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723677513] [2022-03-20 04:57:12,415 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 04:57:12,415 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 04:57:12,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:57:12,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 04:57:12,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-20 04:57:12,416 INFO L87 Difference]: Start difference. First operand 94 states and 98 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-03-20 04:57:12,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:57:12,540 INFO L93 Difference]: Finished difference Result 116 states and 125 transitions. [2022-03-20 04:57:12,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 04:57:12,541 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) Word has length 102 [2022-03-20 04:57:12,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:57:12,542 INFO L225 Difference]: With dead ends: 116 [2022-03-20 04:57:12,542 INFO L226 Difference]: Without dead ends: 116 [2022-03-20 04:57:12,542 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-03-20 04:57:12,542 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 6 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 04:57:12,543 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 290 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 04:57:12,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-03-20 04:57:12,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2022-03-20 04:57:12,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 67 states have (on average 1.044776119402985) internal successors, (70), 69 states have internal predecessors, (70), 28 states have call successors, (28), 20 states have call predecessors, (28), 19 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2022-03-20 04:57:12,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 124 transitions. [2022-03-20 04:57:12,547 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 124 transitions. Word has length 102 [2022-03-20 04:57:12,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:57:12,547 INFO L478 AbstractCegarLoop]: Abstraction has 115 states and 124 transitions. [2022-03-20 04:57:12,548 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-03-20 04:57:12,548 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 124 transitions. [2022-03-20 04:57:12,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-03-20 04:57:12,548 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:57:12,549 INFO L499 BasicCegarLoop]: trace histogram [18, 17, 17, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:57:12,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 04:57:12,751 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,SelfDestructingSolverStorable11 [2022-03-20 04:57:12,751 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:57:12,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:57:12,752 INFO L85 PathProgramCache]: Analyzing trace with hash 474519958, now seen corresponding path program 2 times [2022-03-20 04:57:12,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:57:12,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362285413] [2022-03-20 04:57:12,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:57:12,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:57:12,761 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:57:12,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2006747758] [2022-03-20 04:57:12,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 04:57:12,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:57:12,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:57:12,762 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) [2022-03-20 04:57:12,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 04:57:12,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 04:57:12,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 04:57:12,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-20 04:57:12,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:57:13,180 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 34 proven. 21 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-03-20 04:57:13,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:57:13,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:57:13,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362285413] [2022-03-20 04:57:13,341 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:57:13,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006747758] [2022-03-20 04:57:13,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006747758] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:57:13,341 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 04:57:13,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-03-20 04:57:13,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204982213] [2022-03-20 04:57:13,342 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 04:57:13,342 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 04:57:13,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:57:13,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 04:57:13,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-20 04:57:13,343 INFO L87 Difference]: Start difference. First operand 115 states and 124 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-03-20 04:57:13,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:57:13,461 INFO L93 Difference]: Finished difference Result 124 states and 131 transitions. [2022-03-20 04:57:13,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 04:57:13,461 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 107 [2022-03-20 04:57:13,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:57:13,462 INFO L225 Difference]: With dead ends: 124 [2022-03-20 04:57:13,462 INFO L226 Difference]: Without dead ends: 113 [2022-03-20 04:57:13,463 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-03-20 04:57:13,463 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 6 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 04:57:13,463 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 299 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 04:57:13,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-03-20 04:57:13,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2022-03-20 04:57:13,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 68 states have internal predecessors, (69), 26 states have call successors, (26), 20 states have call predecessors, (26), 19 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-20 04:57:13,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 119 transitions. [2022-03-20 04:57:13,468 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 119 transitions. Word has length 107 [2022-03-20 04:57:13,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:57:13,468 INFO L478 AbstractCegarLoop]: Abstraction has 113 states and 119 transitions. [2022-03-20 04:57:13,468 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-03-20 04:57:13,468 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 119 transitions. [2022-03-20 04:57:13,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-03-20 04:57:13,469 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:57:13,470 INFO L499 BasicCegarLoop]: trace histogram [22, 21, 21, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:57:13,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 04:57:13,671 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,SelfDestructingSolverStorable12 [2022-03-20 04:57:13,671 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:57:13,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:57:13,672 INFO L85 PathProgramCache]: Analyzing trace with hash 94155443, now seen corresponding path program 3 times [2022-03-20 04:57:13,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:57:13,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432917967] [2022-03-20 04:57:13,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:57:13,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:57:13,680 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:57:13,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1230305138] [2022-03-20 04:57:13,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 04:57:13,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:57:13,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:57:13,682 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) [2022-03-20 04:57:13,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 04:57:14,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-20 04:57:14,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 04:57:14,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-20 04:57:14,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:57:14,498 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 107 proven. 16 refuted. 0 times theorem prover too weak. 801 trivial. 0 not checked. [2022-03-20 04:57:14,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:57:16,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:57:16,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432917967] [2022-03-20 04:57:16,548 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:57:16,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230305138] [2022-03-20 04:57:16,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230305138] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:57:16,548 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 04:57:16,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-03-20 04:57:16,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531689432] [2022-03-20 04:57:16,549 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 04:57:16,549 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 04:57:16,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:57:16,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 04:57:16,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=127, Unknown=1, NotChecked=0, Total=156 [2022-03-20 04:57:16,550 INFO L87 Difference]: Start difference. First operand 113 states and 119 transitions. Second operand has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-20 04:57:18,571 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 04:57:18,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:57:18,585 INFO L93 Difference]: Finished difference Result 117 states and 122 transitions. [2022-03-20 04:57:18,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 04:57:18,586 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) Word has length 129 [2022-03-20 04:57:18,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:57:18,587 INFO L225 Difference]: With dead ends: 117 [2022-03-20 04:57:18,587 INFO L226 Difference]: Without dead ends: 115 [2022-03-20 04:57:18,587 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=50, Invalid=221, Unknown=1, NotChecked=0, Total=272 [2022-03-20 04:57:18,588 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 15 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-20 04:57:18,588 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 187 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-20 04:57:18,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-03-20 04:57:18,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2022-03-20 04:57:18,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 69 states have (on average 1.0144927536231885) internal successors, (70), 69 states have internal predecessors, (70), 26 states have call successors, (26), 21 states have call predecessors, (26), 19 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-20 04:57:18,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 120 transitions. [2022-03-20 04:57:18,592 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 120 transitions. Word has length 129 [2022-03-20 04:57:18,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:57:18,592 INFO L478 AbstractCegarLoop]: Abstraction has 115 states and 120 transitions. [2022-03-20 04:57:18,593 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-20 04:57:18,593 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 120 transitions. [2022-03-20 04:57:18,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-03-20 04:57:18,594 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:57:18,594 INFO L499 BasicCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:57:18,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-20 04:57:18,800 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,SelfDestructingSolverStorable13 [2022-03-20 04:57:18,801 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:57:18,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:57:18,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1269707793, now seen corresponding path program 3 times [2022-03-20 04:57:18,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:57:18,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001205121] [2022-03-20 04:57:18,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:57:18,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:57:18,813 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:57:18,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1916762515] [2022-03-20 04:57:18,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 04:57:18,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:57:18,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:57:18,815 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) [2022-03-20 04:57:18,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-20 04:57:19,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-20 04:57:19,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 04:57:19,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 50 conjunts are in the unsatisfiable core [2022-03-20 04:57:19,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:58:07,688 WARN L232 SmtUtils]: Spent 8.34s on a formula simplification. DAG size of input: 46 DAG size of output: 36 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 04:58:07,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 259 proven. 76 refuted. 0 times theorem prover too weak. 675 trivial. 0 not checked. [2022-03-20 04:58:07,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:58:11,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 204 proven. 34 refuted. 0 times theorem prover too weak. 772 trivial. 0 not checked. [2022-03-20 04:58:11,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:58:11,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001205121] [2022-03-20 04:58:11,798 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:58:11,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916762515] [2022-03-20 04:58:11,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916762515] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 04:58:11,798 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 04:58:11,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 22 [2022-03-20 04:58:11,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586890692] [2022-03-20 04:58:11,798 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 04:58:11,799 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 04:58:11,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:58:11,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 04:58:11,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=370, Unknown=1, NotChecked=0, Total=462 [2022-03-20 04:58:11,800 INFO L87 Difference]: Start difference. First operand 115 states and 120 transitions. Second operand has 22 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 13 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2022-03-20 04:58:19,726 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 04:58:28,389 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 04:58:29,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:58:29,072 INFO L93 Difference]: Finished difference Result 117 states and 121 transitions. [2022-03-20 04:58:29,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 04:58:29,073 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 13 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) Word has length 134 [2022-03-20 04:58:29,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:58:29,073 INFO L225 Difference]: With dead ends: 117 [2022-03-20 04:58:29,073 INFO L226 Difference]: Without dead ends: 0 [2022-03-20 04:58:29,074 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 246 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 34.8s TimeCoverageRelationStatistics Valid=165, Invalid=646, Unknown=1, NotChecked=0, Total=812 [2022-03-20 04:58:29,074 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 32 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 111 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-03-20 04:58:29,074 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 151 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 152 Invalid, 1 Unknown, 0 Unchecked, 5.3s Time] [2022-03-20 04:58:29,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-20 04:58:29,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-20 04:58:29,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-20 04:58:29,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-20 04:58:29,075 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 134 [2022-03-20 04:58:29,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:58:29,075 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-20 04:58:29,076 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 13 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2022-03-20 04:58:29,076 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-20 04:58:29,076 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-20 04:58:29,078 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 04:58:29,084 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-03-20 04:58:29,278 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,SelfDestructingSolverStorable14 [2022-03-20 04:58:29,281 INFO L719 BasicCegarLoop]: Path program histogram: [4, 3, 3, 1, 1, 1, 1, 1] [2022-03-20 04:58:29,282 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 04:58:29,284 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 04:58:29 BasicIcfg [2022-03-20 04:58:29,284 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 04:58:29,284 INFO L158 Benchmark]: Toolchain (without parser) took 97269.56ms. Allocated memory was 181.4MB in the beginning and 225.4MB in the end (delta: 44.0MB). Free memory was 134.9MB in the beginning and 75.1MB in the end (delta: 59.8MB). Peak memory consumption was 105.2MB. Max. memory is 8.0GB. [2022-03-20 04:58:29,284 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 181.4MB. Free memory is still 151.5MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 04:58:29,284 INFO L158 Benchmark]: CACSL2BoogieTranslator took 295.72ms. Allocated memory is still 181.4MB. Free memory was 134.7MB in the beginning and 159.2MB in the end (delta: -24.5MB). Peak memory consumption was 14.9MB. Max. memory is 8.0GB. [2022-03-20 04:58:29,285 INFO L158 Benchmark]: Boogie Preprocessor took 33.16ms. Allocated memory is still 181.4MB. Free memory was 159.2MB in the beginning and 157.8MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 04:58:29,285 INFO L158 Benchmark]: RCFGBuilder took 245.93ms. Allocated memory is still 181.4MB. Free memory was 157.8MB in the beginning and 147.3MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-20 04:58:29,285 INFO L158 Benchmark]: IcfgTransformer took 39.06ms. Allocated memory is still 181.4MB. Free memory was 147.3MB in the beginning and 145.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-20 04:58:29,285 INFO L158 Benchmark]: TraceAbstraction took 96651.41ms. Allocated memory was 181.4MB in the beginning and 225.4MB in the end (delta: 44.0MB). Free memory was 145.5MB in the beginning and 75.1MB in the end (delta: 70.4MB). Peak memory consumption was 115.5MB. Max. memory is 8.0GB. [2022-03-20 04:58:29,287 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 181.4MB. Free memory is still 151.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 295.72ms. Allocated memory is still 181.4MB. Free memory was 134.7MB in the beginning and 159.2MB in the end (delta: -24.5MB). Peak memory consumption was 14.9MB. Max. memory is 8.0GB. * Boogie Preprocessor took 33.16ms. Allocated memory is still 181.4MB. Free memory was 159.2MB in the beginning and 157.8MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 245.93ms. Allocated memory is still 181.4MB. Free memory was 157.8MB in the beginning and 147.3MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 39.06ms. Allocated memory is still 181.4MB. Free memory was 147.3MB in the beginning and 145.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * TraceAbstraction took 96651.41ms. Allocated memory was 181.4MB in the beginning and 225.4MB in the end (delta: 44.0MB). Free memory was 145.5MB in the beginning and 75.1MB in the end (delta: 70.4MB). Peak memory consumption was 115.5MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 36 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 96.6s, OverallIterations: 15, TraceHistogramMax: 23, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 22.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 239 SdHoareTripleChecker+Valid, 8.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 175 mSDsluCounter, 2773 SdHoareTripleChecker+Invalid, 8.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2171 mSDsCounter, 382 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1659 IncrementalHoareTripleChecker+Invalid, 2042 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 382 mSolverCounterUnsat, 602 mSDtfsCounter, 1659 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1536 GetRequests, 1372 SyntacticMatches, 10 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 44.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=115occurred in iteration=12, InterpolantAutomatonStates: 115, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 15 MinimizatonAttempts, 54 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 69.0s InterpolantComputationTime, 985 NumberOfCodeBlocks, 796 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 1342 ConstructedInterpolants, 0 QuantifiedInterpolants, 5862 SizeOfPredicates, 33 NumberOfNonLiveVariables, 1921 ConjunctsInSsa, 259 ConjunctsInUnsatCore, 20 InterpolantComputations, 5 PerfectInterpolantSequences, 5633/5874 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-03-20 04:58:29,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...