/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_valuebound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 04:56:30,995 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 04:56:31,005 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 04:56:31,064 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 04:56:31,079 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 04:56:31,085 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 04:56:31,086 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 04:56:31,090 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 04:56:31,091 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 04:56:31,093 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 04:56:31,096 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 04:56:31,099 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 04:56:31,100 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 04:56:31,103 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 04:56:31,104 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 04:56:31,105 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 04:56:31,105 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 04:56:31,107 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 04:56:31,113 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 04:56:31,113 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 04:56:31,121 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 04:56:31,122 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-20 04:56:31,134 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 04:56:31,134 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 04:56:31,137 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 04:56:31,137 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 04:56:31,137 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 04:56:31,137 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 04:56:31,137 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 04:56:31,137 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 04:56:31,137 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 04:56:31,138 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 04:56:31,138 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 04:56:31,138 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 04:56:31,139 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 04:56:31,139 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 04:56:31,139 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 04:56:31,139 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 04:56:31,139 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 04:56:31,139 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 04:56:31,139 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 04:56:31,140 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 04:56:31,140 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 04:56:31,141 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 04:56:31,141 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 04:56:31,368 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 04:56:31,389 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 04:56:31,392 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 04:56:31,392 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 04:56:31,393 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 04:56:31,394 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_valuebound2.c [2022-03-20 04:56:31,451 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34796d5c4/b82ac09bf1b4477f97c1554a882a8801/FLAGeba7ed5ef [2022-03-20 04:56:31,882 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 04:56:31,883 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_valuebound2.c [2022-03-20 04:56:31,890 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34796d5c4/b82ac09bf1b4477f97c1554a882a8801/FLAGeba7ed5ef [2022-03-20 04:56:31,908 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34796d5c4/b82ac09bf1b4477f97c1554a882a8801 [2022-03-20 04:56:31,911 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 04:56:31,913 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 04:56:31,914 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 04:56:31,915 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 04:56:31,918 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 04:56:31,918 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 04:56:31" (1/1) ... [2022-03-20 04:56:31,919 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7be3dd17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:56:31, skipping insertion in model container [2022-03-20 04:56:31,920 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 04:56:31" (1/1) ... [2022-03-20 04:56:31,926 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 04:56:31,940 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 04:56:32,104 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_valuebound2.c[588,601] [2022-03-20 04:56:32,143 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 04:56:32,149 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 04:56:32,164 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_valuebound2.c[588,601] [2022-03-20 04:56:32,184 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 04:56:32,196 INFO L208 MainTranslator]: Completed translation [2022-03-20 04:56:32,197 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:56:32 WrapperNode [2022-03-20 04:56:32,197 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 04:56:32,198 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 04:56:32,198 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 04:56:32,198 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 04:56:32,208 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:56:32" (1/1) ... [2022-03-20 04:56:32,208 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:56:32" (1/1) ... [2022-03-20 04:56:32,222 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:56:32" (1/1) ... [2022-03-20 04:56:32,222 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:56:32" (1/1) ... [2022-03-20 04:56:32,226 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:56:32" (1/1) ... [2022-03-20 04:56:32,229 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:56:32" (1/1) ... [2022-03-20 04:56:32,230 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:56:32" (1/1) ... [2022-03-20 04:56:32,235 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 04:56:32,237 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 04:56:32,237 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 04:56:32,237 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 04:56:32,238 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:56:32" (1/1) ... [2022-03-20 04:56:32,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 04:56:32,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:56:32,273 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 04:56:32,291 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 04:56:32,324 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 04:56:32,324 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 04:56:32,324 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 04:56:32,324 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 04:56:32,325 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 04:56:32,325 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 04:56:32,326 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 04:56:32,326 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 04:56:32,326 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 04:56:32,326 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 04:56:32,326 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ushort [2022-03-20 04:56:32,327 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 04:56:32,327 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 04:56:32,327 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 04:56:32,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 04:56:32,329 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 04:56:32,329 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 04:56:32,329 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 04:56:32,330 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 04:56:32,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 04:56:32,388 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 04:56:32,391 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 04:56:32,547 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 04:56:32,552 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 04:56:32,552 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 04:56:32,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 04:56:32 BoogieIcfgContainer [2022-03-20 04:56:32,554 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 04:56:32,555 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 04:56:32,555 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 04:56:32,555 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 04:56:32,558 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 04:56:32" (1/1) ... [2022-03-20 04:56:32,559 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-03-20 04:56:32,590 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 04:56:32 BasicIcfg [2022-03-20 04:56:32,591 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 04:56:32,592 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 04:56:32,592 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 04:56:32,596 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 04:56:32,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 04:56:31" (1/4) ... [2022-03-20 04:56:32,597 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@362eacf0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 04:56:32, skipping insertion in model container [2022-03-20 04:56:32,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:56:32" (2/4) ... [2022-03-20 04:56:32,598 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@362eacf0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 04:56:32, skipping insertion in model container [2022-03-20 04:56:32,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 04:56:32" (3/4) ... [2022-03-20 04:56:32,598 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@362eacf0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 04:56:32, skipping insertion in model container [2022-03-20 04:56:32,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 04:56:32" (4/4) ... [2022-03-20 04:56:32,599 INFO L111 eAbstractionObserver]: Analyzing ICFG cohencu-ll_valuebound2.cJordan [2022-03-20 04:56:32,603 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-20 04:56:32,603 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 04:56:32,638 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 04:56:32,644 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 04:56:32,644 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 04:56:32,659 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 04:56:32,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 04:56:32,669 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:56:32,669 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 04:56:32,670 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:56:32,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:56:32,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1231486971, now seen corresponding path program 1 times [2022-03-20 04:56:32,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:56:32,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589142942] [2022-03-20 04:56:32,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:56:32,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:56:32,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:56:32,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 04:56:32,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:56:32,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 04:56:32,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:56:32,911 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 04:56:32,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:56:32,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589142942] [2022-03-20 04:56:32,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589142942] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 04:56:32,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 04:56:32,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 04:56:32,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120233614] [2022-03-20 04:56:32,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 04:56:32,919 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 04:56:32,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:56:32,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 04:56:32,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 04:56:32,949 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 04:56:33,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:56:33,052 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2022-03-20 04:56:33,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 04:56:33,054 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 04:56:33,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:56:33,059 INFO L225 Difference]: With dead ends: 36 [2022-03-20 04:56:33,060 INFO L226 Difference]: Without dead ends: 31 [2022-03-20 04:56:33,061 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 04:56:33,063 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 04:56:33,064 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 04:56:33,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-03-20 04:56:33,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-03-20 04:56:33,097 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 04:56:33,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2022-03-20 04:56:33,101 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 17 [2022-03-20 04:56:33,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:56:33,102 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2022-03-20 04:56:33,102 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 04:56:33,102 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2022-03-20 04:56:33,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 04:56:33,103 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:56:33,103 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 04:56:33,103 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 04:56:33,104 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:56:33,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:56:33,105 INFO L85 PathProgramCache]: Analyzing trace with hash -574090659, now seen corresponding path program 1 times [2022-03-20 04:56:33,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:56:33,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363048418] [2022-03-20 04:56:33,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:56:33,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:56:33,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:56:33,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 04:56:33,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:56:33,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 04:56:33,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:56:33,304 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 04:56:33,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:56:33,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363048418] [2022-03-20 04:56:33,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363048418] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 04:56:33,305 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 04:56:33,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 04:56:33,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126888748] [2022-03-20 04:56:33,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 04:56:33,306 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 04:56:33,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:56:33,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 04:56:33,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 04:56:33,311 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 04:56:33,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:56:33,493 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2022-03-20 04:56:33,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 04:56:33,494 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 04:56:33,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:56:33,496 INFO L225 Difference]: With dead ends: 35 [2022-03-20 04:56:33,497 INFO L226 Difference]: Without dead ends: 35 [2022-03-20 04:56:33,499 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 04:56:33,501 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, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 04:56:33,501 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 43 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 04:56:33,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-20 04:56:33,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-03-20 04:56:33,507 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 04:56:33,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2022-03-20 04:56:33,514 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 17 [2022-03-20 04:56:33,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:56:33,515 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2022-03-20 04:56:33,515 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 04:56:33,515 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2022-03-20 04:56:33,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 04:56:33,516 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:56:33,516 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 04:56:33,527 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 04:56:33,528 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:56:33,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:56:33,528 INFO L85 PathProgramCache]: Analyzing trace with hash 344526146, now seen corresponding path program 1 times [2022-03-20 04:56:33,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:56:33,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001156977] [2022-03-20 04:56:33,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:56:33,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:56:33,543 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:56:33,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [970418855] [2022-03-20 04:56:33,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:56:33,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:56:33,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:56:33,547 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 04:56:33,548 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 04:56:33,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:56:33,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 04:56:33,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:56:33,678 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 04:56:33,679 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 04:56:33,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:56:33,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001156977] [2022-03-20 04:56:33,679 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:56:33,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970418855] [2022-03-20 04:56:33,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970418855] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 04:56:33,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 04:56:33,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 04:56:33,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143102361] [2022-03-20 04:56:33,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 04:56:33,680 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 04:56:33,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:56:33,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 04:56:33,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 04:56:33,681 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 04:56:33,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:56:33,726 INFO L93 Difference]: Finished difference Result 52 states and 71 transitions. [2022-03-20 04:56:33,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 04:56:33,727 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 04:56:33,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:56:33,728 INFO L225 Difference]: With dead ends: 52 [2022-03-20 04:56:33,728 INFO L226 Difference]: Without dead ends: 52 [2022-03-20 04:56:33,728 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 04:56:33,729 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 04:56:33,730 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 04:56:33,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-20 04:56:33,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2022-03-20 04:56:33,736 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 04:56:33,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2022-03-20 04:56:33,737 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 22 [2022-03-20 04:56:33,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:56:33,738 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2022-03-20 04:56:33,738 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 04:56:33,738 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2022-03-20 04:56:33,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-20 04:56:33,739 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:56:33,739 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 04:56:33,763 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-20 04:56:33,958 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 04:56:33,958 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:56:33,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:56:33,959 INFO L85 PathProgramCache]: Analyzing trace with hash 942277242, now seen corresponding path program 1 times [2022-03-20 04:56:33,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:56:33,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685929934] [2022-03-20 04:56:33,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:56:33,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:56:33,970 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:56:33,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1262138914] [2022-03-20 04:56:33,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:56:33,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:56:33,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:56:33,973 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 04:56:33,977 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 04:56:34,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:56:34,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 04:56:34,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:56:34,082 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 04:56:34,082 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 04:56:34,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:56:34,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685929934] [2022-03-20 04:56:34,083 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:56:34,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262138914] [2022-03-20 04:56:34,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262138914] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 04:56:34,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 04:56:34,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 04:56:34,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680251937] [2022-03-20 04:56:34,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 04:56:34,084 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 04:56:34,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:56:34,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 04:56:34,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 04:56:34,085 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 04:56:34,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:56:34,124 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2022-03-20 04:56:34,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 04:56:34,124 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 04:56:34,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:56:34,125 INFO L225 Difference]: With dead ends: 56 [2022-03-20 04:56:34,125 INFO L226 Difference]: Without dead ends: 56 [2022-03-20 04:56:34,126 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 04:56:34,127 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 04:56:34,127 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 04:56:34,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-20 04:56:34,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2022-03-20 04:56:34,134 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 04:56:34,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2022-03-20 04:56:34,135 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 27 [2022-03-20 04:56:34,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:56:34,135 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2022-03-20 04:56:34,135 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 04:56:34,135 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2022-03-20 04:56:34,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-20 04:56:34,136 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:56:34,136 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 04:56:34,166 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 04:56:34,361 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 04:56:34,362 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:56:34,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:56:34,363 INFO L85 PathProgramCache]: Analyzing trace with hash -881201762, now seen corresponding path program 1 times [2022-03-20 04:56:34,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:56:34,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130765504] [2022-03-20 04:56:34,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:56:34,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:56:34,372 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:56:34,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2055996395] [2022-03-20 04:56:34,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:56:34,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:56:34,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:56:34,374 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 04:56:34,375 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 04:56:34,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:56:34,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 04:56:34,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:56:34,519 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 04:56:34,519 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 04:56:34,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:56:34,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130765504] [2022-03-20 04:56:34,520 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:56:34,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055996395] [2022-03-20 04:56:34,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055996395] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 04:56:34,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 04:56:34,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 04:56:34,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582900025] [2022-03-20 04:56:34,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 04:56:34,521 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 04:56:34,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:56:34,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 04:56:34,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 04:56:34,521 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 04:56:34,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:56:34,583 INFO L93 Difference]: Finished difference Result 64 states and 80 transitions. [2022-03-20 04:56:34,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 04:56:34,584 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 04:56:34,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:56:34,585 INFO L225 Difference]: With dead ends: 64 [2022-03-20 04:56:34,586 INFO L226 Difference]: Without dead ends: 54 [2022-03-20 04:56:34,587 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 04:56:34,589 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 04:56:34,589 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 04:56:34,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-20 04:56:34,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-03-20 04:56:34,595 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 04:56:34,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2022-03-20 04:56:34,596 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 32 [2022-03-20 04:56:34,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:56:34,597 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2022-03-20 04:56:34,597 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 04:56:34,597 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2022-03-20 04:56:34,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-20 04:56:34,598 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:56:34,598 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 04:56:34,615 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 04:56:34,799 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 04:56:34,799 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:56:34,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:56:34,800 INFO L85 PathProgramCache]: Analyzing trace with hash 72164327, now seen corresponding path program 1 times [2022-03-20 04:56:34,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:56:34,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424788794] [2022-03-20 04:56:34,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:56:34,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:56:34,810 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:56:34,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [892143865] [2022-03-20 04:56:34,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:56:34,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:56:34,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:56:34,814 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 04:56:34,815 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 04:56:34,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:56:34,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 04:56:34,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:56:35,050 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 04:56:35,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:56:35,221 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 04:56:35,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:56:35,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424788794] [2022-03-20 04:56:35,222 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:56:35,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892143865] [2022-03-20 04:56:35,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892143865] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 04:56:35,222 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 04:56:35,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-03-20 04:56:35,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847576896] [2022-03-20 04:56:35,223 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 04:56:35,223 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 04:56:35,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:56:35,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 04:56:35,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-20 04:56:35,224 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 04:56:35,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:56:35,576 INFO L93 Difference]: Finished difference Result 75 states and 95 transitions. [2022-03-20 04:56:35,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 04:56:35,577 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 04:56:35,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:56:35,578 INFO L225 Difference]: With dead ends: 75 [2022-03-20 04:56:35,578 INFO L226 Difference]: Without dead ends: 75 [2022-03-20 04:56:35,578 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 04:56:35,579 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 9 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 04:56:35,579 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 208 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 04:56:35,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-03-20 04:56:35,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 62. [2022-03-20 04:56:35,586 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 04:56:35,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2022-03-20 04:56:35,587 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 49 [2022-03-20 04:56:35,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:56:35,588 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2022-03-20 04:56:35,588 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 04:56:35,588 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2022-03-20 04:56:35,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-20 04:56:35,589 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:56:35,589 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 04:56:35,607 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-20 04:56:35,795 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 04:56:35,796 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:56:35,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:56:35,796 INFO L85 PathProgramCache]: Analyzing trace with hash 655575797, now seen corresponding path program 2 times [2022-03-20 04:56:35,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:56:35,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607617669] [2022-03-20 04:56:35,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:56:35,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:56:35,810 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:56:35,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1405183831] [2022-03-20 04:56:35,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 04:56:35,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:56:35,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:56:35,817 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 04:56:35,818 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 04:56:35,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 04:56:35,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 04:56:35,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 04:56:35,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:56:36,041 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 04:56:36,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:56:36,182 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 04:56:36,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:56:36,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607617669] [2022-03-20 04:56:36,183 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:56:36,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405183831] [2022-03-20 04:56:36,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405183831] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 04:56:36,183 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 04:56:36,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-03-20 04:56:36,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843901114] [2022-03-20 04:56:36,183 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 04:56:36,186 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 04:56:36,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:56:36,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 04:56:36,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-20 04:56:36,187 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 04:56:36,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:56:36,277 INFO L93 Difference]: Finished difference Result 79 states and 98 transitions. [2022-03-20 04:56:36,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 04:56:36,278 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 04:56:36,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:56:36,279 INFO L225 Difference]: With dead ends: 79 [2022-03-20 04:56:36,280 INFO L226 Difference]: Without dead ends: 79 [2022-03-20 04:56:36,280 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 04:56:36,281 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 04:56:36,281 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 04:56:36,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-20 04:56:36,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 70. [2022-03-20 04:56:36,287 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 04:56:36,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 81 transitions. [2022-03-20 04:56:36,288 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 81 transitions. Word has length 54 [2022-03-20 04:56:36,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:56:36,288 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 81 transitions. [2022-03-20 04:56:36,288 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 04:56:36,289 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 81 transitions. [2022-03-20 04:56:36,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-20 04:56:36,290 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:56:36,290 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 04:56:36,316 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 04:56:36,513 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 04:56:36,514 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:56:36,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:56:36,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1963047427, now seen corresponding path program 3 times [2022-03-20 04:56:36,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:56:36,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145934854] [2022-03-20 04:56:36,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:56:36,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:56:36,524 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:56:36,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [843873223] [2022-03-20 04:56:36,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 04:56:36,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:56:36,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:56:36,530 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 04:56:36,531 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 04:56:36,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-20 04:56:36,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 04:56:36,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-20 04:56:36,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:56:36,789 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 04:56:36,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:56:37,062 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 04:56:37,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:56:37,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145934854] [2022-03-20 04:56:37,063 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:56:37,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843873223] [2022-03-20 04:56:37,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843873223] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 04:56:37,064 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 04:56:37,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-03-20 04:56:37,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092977916] [2022-03-20 04:56:37,064 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 04:56:37,064 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 04:56:37,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:56:37,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 04:56:37,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-20 04:56:37,065 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 04:56:37,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:56:37,308 INFO L93 Difference]: Finished difference Result 91 states and 107 transitions. [2022-03-20 04:56:37,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 04:56:37,308 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 04:56:37,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:56:37,310 INFO L225 Difference]: With dead ends: 91 [2022-03-20 04:56:37,310 INFO L226 Difference]: Without dead ends: 85 [2022-03-20 04:56:37,310 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 04:56:37,310 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 04:56:37,311 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 04:56:37,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-03-20 04:56:37,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 79. [2022-03-20 04:56:37,316 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 04:56:37,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 84 transitions. [2022-03-20 04:56:37,317 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 84 transitions. Word has length 59 [2022-03-20 04:56:37,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:56:37,317 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 84 transitions. [2022-03-20 04:56:37,317 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 04:56:37,318 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 84 transitions. [2022-03-20 04:56:37,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-20 04:56:37,319 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:56:37,319 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 04:56:37,346 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 04:56:37,533 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 04:56:37,533 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:56:37,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:56:37,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1897273453, now seen corresponding path program 1 times [2022-03-20 04:56:37,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:56:37,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90529911] [2022-03-20 04:56:37,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:56:37,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:56:37,545 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:56:37,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2133695783] [2022-03-20 04:56:37,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:56:37,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:56:37,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:56:37,554 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 04:56:37,556 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 04:56:37,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:56:37,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-20 04:56:37,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:56:37,926 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 04:56:37,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:56:38,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:56:38,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90529911] [2022-03-20 04:56:38,249 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:56:38,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133695783] [2022-03-20 04:56:38,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133695783] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:56:38,249 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 04:56:38,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-03-20 04:56:38,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432598070] [2022-03-20 04:56:38,249 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 04:56:38,250 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 04:56:38,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:56:38,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 04:56:38,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-20 04:56:38,251 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 04:56:38,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:56:38,353 INFO L93 Difference]: Finished difference Result 93 states and 101 transitions. [2022-03-20 04:56:38,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 04:56:38,354 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 04:56:38,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:56:38,355 INFO L225 Difference]: With dead ends: 93 [2022-03-20 04:56:38,355 INFO L226 Difference]: Without dead ends: 93 [2022-03-20 04:56:38,355 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-03-20 04:56:38,356 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 04:56:38,356 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 04:56:38,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-03-20 04:56:38,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2022-03-20 04:56:38,361 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 04:56:38,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 100 transitions. [2022-03-20 04:56:38,362 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 100 transitions. Word has length 75 [2022-03-20 04:56:38,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:56:38,362 INFO L478 AbstractCegarLoop]: Abstraction has 92 states and 100 transitions. [2022-03-20 04:56:38,362 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 04:56:38,362 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 100 transitions. [2022-03-20 04:56:38,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-20 04:56:38,363 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:56:38,363 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 04:56:38,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 04:56:38,564 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 04:56:38,564 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:56:38,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:56:38,565 INFO L85 PathProgramCache]: Analyzing trace with hash -994112719, now seen corresponding path program 1 times [2022-03-20 04:56:38,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:56:38,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631783898] [2022-03-20 04:56:38,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:56:38,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:56:38,584 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:56:38,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1968755291] [2022-03-20 04:56:38,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:56:38,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:56:38,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:56:38,586 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 04:56:38,594 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 04:56:38,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:56:38,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-20 04:56:38,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:56:39,348 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 04:56:39,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:56:50,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:56:50,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631783898] [2022-03-20 04:56:50,315 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:56:50,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968755291] [2022-03-20 04:56:50,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968755291] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:56:50,315 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 04:56:50,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-03-20 04:56:50,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775108339] [2022-03-20 04:56:50,316 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 04:56:50,316 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 04:56:50,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:56:50,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 04:56:50,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-03-20 04:56:50,317 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 04:56:51,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:56:51,577 INFO L93 Difference]: Finished difference Result 101 states and 107 transitions. [2022-03-20 04:56:51,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 04:56:51,577 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 04:56:51,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:56:51,578 INFO L225 Difference]: With dead ends: 101 [2022-03-20 04:56:51,579 INFO L226 Difference]: Without dead ends: 90 [2022-03-20 04:56:51,579 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 04:56:51,580 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, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 04:56:51,580 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 205 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 04:56:51,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-03-20 04:56:51,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-03-20 04:56:51,584 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 04:56:51,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 95 transitions. [2022-03-20 04:56:51,585 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 95 transitions. Word has length 80 [2022-03-20 04:56:51,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:56:51,585 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 95 transitions. [2022-03-20 04:56:51,586 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 04:56:51,586 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 95 transitions. [2022-03-20 04:56:51,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-03-20 04:56:51,587 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:56:51,587 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 04:56:51,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 04:56:51,787 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 04:56:51,788 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:56:51,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:56:51,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1391751782, now seen corresponding path program 4 times [2022-03-20 04:56:51,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:56:51,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515748108] [2022-03-20 04:56:51,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:56:51,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:56:51,799 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:56:51,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1668073837] [2022-03-20 04:56:51,800 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 04:56:51,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:56:51,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:56:51,804 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 04:56:51,805 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 04:56:51,853 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 04:56:51,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 04:56:51,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-20 04:56:51,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:56:52,116 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 04:56:52,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:56:52,322 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 04:56:52,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:56:52,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515748108] [2022-03-20 04:56:52,323 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:56:52,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668073837] [2022-03-20 04:56:52,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668073837] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 04:56:52,323 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 04:56:52,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-03-20 04:56:52,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530414520] [2022-03-20 04:56:52,324 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 04:56:52,324 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 04:56:52,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:56:52,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 04:56:52,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-03-20 04:56:52,325 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 04:56:52,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:56:52,701 INFO L93 Difference]: Finished difference Result 104 states and 116 transitions. [2022-03-20 04:56:52,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 04:56:52,702 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 04:56:52,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:56:52,703 INFO L225 Difference]: With dead ends: 104 [2022-03-20 04:56:52,703 INFO L226 Difference]: Without dead ends: 104 [2022-03-20 04:56:52,703 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 04:56:52,707 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 12 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 04:56:52,708 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 195 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 04:56:52,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-03-20 04:56:52,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 94. [2022-03-20 04:56:52,713 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 04:56:52,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 98 transitions. [2022-03-20 04:56:52,714 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 98 transitions. Word has length 81 [2022-03-20 04:56:52,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:56:52,714 INFO L478 AbstractCegarLoop]: Abstraction has 94 states and 98 transitions. [2022-03-20 04:56:52,715 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 04:56:52,715 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 98 transitions. [2022-03-20 04:56:52,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 04:56:52,716 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:56:52,716 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 04:56:52,739 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 04:56:52,916 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 04:56:52,917 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:56:52,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:56:52,917 INFO L85 PathProgramCache]: Analyzing trace with hash 574631438, now seen corresponding path program 2 times [2022-03-20 04:56:52,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:56:52,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435312902] [2022-03-20 04:56:52,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:56:52,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:56:52,925 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:56:52,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [951101185] [2022-03-20 04:56:52,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 04:56:52,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:56:52,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:56:52,930 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 04:56:52,936 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 04:56:52,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 04:56:52,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 04:56:52,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-20 04:56:52,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:56:53,401 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 04:56:53,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:56:53,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:56:53,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435312902] [2022-03-20 04:56:53,608 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:56:53,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951101185] [2022-03-20 04:56:53,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951101185] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:56:53,608 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 04:56:53,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-03-20 04:56:53,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887865318] [2022-03-20 04:56:53,608 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 04:56:53,609 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 04:56:53,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:56:53,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 04:56:53,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-20 04:56:53,609 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 04:56:53,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:56:53,762 INFO L93 Difference]: Finished difference Result 116 states and 125 transitions. [2022-03-20 04:56:53,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 04:56:53,762 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 04:56:53,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:56:53,763 INFO L225 Difference]: With dead ends: 116 [2022-03-20 04:56:53,763 INFO L226 Difference]: Without dead ends: 116 [2022-03-20 04:56:53,764 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 04:56:53,764 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 04:56:53,764 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 04:56:53,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-03-20 04:56:53,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2022-03-20 04:56:53,772 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 04:56:53,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 124 transitions. [2022-03-20 04:56:53,772 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 124 transitions. Word has length 102 [2022-03-20 04:56:53,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:56:53,773 INFO L478 AbstractCegarLoop]: Abstraction has 115 states and 124 transitions. [2022-03-20 04:56:53,773 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 04:56:53,773 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 124 transitions. [2022-03-20 04:56:53,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-03-20 04:56:53,774 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:56:53,774 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 04:56:53,802 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 04:56:53,991 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 04:56:53,992 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:56:53,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:56:53,992 INFO L85 PathProgramCache]: Analyzing trace with hash 474519958, now seen corresponding path program 2 times [2022-03-20 04:56:53,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:56:53,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271851155] [2022-03-20 04:56:53,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:56:53,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:56:54,000 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:56:54,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1970848819] [2022-03-20 04:56:54,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 04:56:54,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:56:54,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:56:54,007 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 04:56:54,009 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 04:56:54,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 04:56:54,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 04:56:54,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-20 04:56:54,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:56:54,457 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 04:56:54,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:56:54,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:56:54,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271851155] [2022-03-20 04:56:54,660 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:56:54,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970848819] [2022-03-20 04:56:54,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970848819] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:56:54,661 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 04:56:54,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-03-20 04:56:54,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296275351] [2022-03-20 04:56:54,661 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 04:56:54,663 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 04:56:54,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:56:54,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 04:56:54,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-20 04:56:54,663 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 04:56:54,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:56:54,791 INFO L93 Difference]: Finished difference Result 124 states and 131 transitions. [2022-03-20 04:56:54,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 04:56:54,792 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 04:56:54,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:56:54,793 INFO L225 Difference]: With dead ends: 124 [2022-03-20 04:56:54,793 INFO L226 Difference]: Without dead ends: 113 [2022-03-20 04:56:54,793 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 04:56:54,794 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 04:56:54,794 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 04:56:54,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-03-20 04:56:54,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2022-03-20 04:56:54,798 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 04:56:54,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 119 transitions. [2022-03-20 04:56:54,799 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 119 transitions. Word has length 107 [2022-03-20 04:56:54,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:56:54,799 INFO L478 AbstractCegarLoop]: Abstraction has 113 states and 119 transitions. [2022-03-20 04:56:54,800 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 04:56:54,800 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 119 transitions. [2022-03-20 04:56:54,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-03-20 04:56:54,801 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:56:54,801 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 04:56:54,825 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 04:56:55,015 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 04:56:55,015 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:56:55,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:56:55,016 INFO L85 PathProgramCache]: Analyzing trace with hash 94155443, now seen corresponding path program 3 times [2022-03-20 04:56:55,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:56:55,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567771301] [2022-03-20 04:56:55,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:56:55,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:56:55,024 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:56:55,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1897712845] [2022-03-20 04:56:55,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 04:56:55,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:56:55,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:56:55,025 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 04:56:55,044 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 04:56:55,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-20 04:56:55,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 04:56:55,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-20 04:56:55,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:56:55,645 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 04:56:55,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:56:57,103 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 04:56:57,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:56:57,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567771301] [2022-03-20 04:56:57,103 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:56:57,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897712845] [2022-03-20 04:56:57,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897712845] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 04:56:57,103 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 04:56:57,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 17 [2022-03-20 04:56:57,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48046338] [2022-03-20 04:56:57,104 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 04:56:57,104 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 04:56:57,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:56:57,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 04:56:57,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-03-20 04:56:57,105 INFO L87 Difference]: Start difference. First operand 113 states and 119 transitions. Second operand has 17 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 9 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (25), 6 states have call predecessors, (25), 9 states have call successors, (25) [2022-03-20 04:56:57,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:56:57,691 INFO L93 Difference]: Finished difference Result 117 states and 122 transitions. [2022-03-20 04:56:57,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 04:56:57,691 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 9 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (25), 6 states have call predecessors, (25), 9 states have call successors, (25) Word has length 129 [2022-03-20 04:56:57,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:56:57,692 INFO L225 Difference]: With dead ends: 117 [2022-03-20 04:56:57,692 INFO L226 Difference]: Without dead ends: 115 [2022-03-20 04:56:57,692 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 241 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-03-20 04:56:57,693 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 30 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 04:56:57,693 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 130 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 04:56:57,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-03-20 04:56:57,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2022-03-20 04:56:57,696 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 04:56:57,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 120 transitions. [2022-03-20 04:56:57,697 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 120 transitions. Word has length 129 [2022-03-20 04:56:57,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:56:57,698 INFO L478 AbstractCegarLoop]: Abstraction has 115 states and 120 transitions. [2022-03-20 04:56:57,698 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 9 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (25), 6 states have call predecessors, (25), 9 states have call successors, (25) [2022-03-20 04:56:57,698 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 120 transitions. [2022-03-20 04:56:57,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-03-20 04:56:57,699 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:56:57,699 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 04:56:57,719 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 04:56:57,906 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 04:56:57,907 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:56:57,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:56:57,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1269707793, now seen corresponding path program 3 times [2022-03-20 04:56:57,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:56:57,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11243360] [2022-03-20 04:56:57,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:56:57,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:56:57,922 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:56:57,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [908210577] [2022-03-20 04:56:57,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 04:56:57,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:56:57,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:56:57,931 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 04:56:57,932 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 04:56:58,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-20 04:56:58,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 04:56:58,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-20 04:56:58,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:56:59,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 181 proven. 69 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-03-20 04:56:59,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:57:01,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 148 proven. 39 refuted. 0 times theorem prover too weak. 823 trivial. 0 not checked. [2022-03-20 04:57:01,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:57:01,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11243360] [2022-03-20 04:57:01,646 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:57:01,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908210577] [2022-03-20 04:57:01,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908210577] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 04:57:01,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 04:57:01,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 18 [2022-03-20 04:57:01,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548020639] [2022-03-20 04:57:01,647 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 04:57:01,647 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 04:57:01,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:57:01,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 04:57:01,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-03-20 04:57:01,648 INFO L87 Difference]: Start difference. First operand 115 states and 120 transitions. Second operand has 18 states, 16 states have (on average 2.125) internal successors, (34), 14 states have internal predecessors, (34), 9 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (34), 8 states have call predecessors, (34), 9 states have call successors, (34) [2022-03-20 04:57:02,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:57:02,426 INFO L93 Difference]: Finished difference Result 113 states and 118 transitions. [2022-03-20 04:57:02,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 04:57:02,426 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.125) internal successors, (34), 14 states have internal predecessors, (34), 9 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (34), 8 states have call predecessors, (34), 9 states have call successors, (34) Word has length 134 [2022-03-20 04:57:02,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:57:02,427 INFO L225 Difference]: With dead ends: 113 [2022-03-20 04:57:02,427 INFO L226 Difference]: Without dead ends: 0 [2022-03-20 04:57:02,427 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 249 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2022-03-20 04:57:02,428 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 19 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 04:57:02,428 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 178 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 04:57:02,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-20 04:57:02,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-20 04:57:02,428 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 04:57:02,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-20 04:57:02,429 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 134 [2022-03-20 04:57:02,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:57:02,429 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-20 04:57:02,429 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.125) internal successors, (34), 14 states have internal predecessors, (34), 9 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (34), 8 states have call predecessors, (34), 9 states have call successors, (34) [2022-03-20 04:57:02,429 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-20 04:57:02,429 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-20 04:57:02,431 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 04:57:02,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-20 04:57:02,637 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 04:57:02,640 INFO L719 BasicCegarLoop]: Path program histogram: [4, 3, 3, 1, 1, 1, 1, 1] [2022-03-20 04:57:02,641 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 04:57:02,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 04:57:02 BasicIcfg [2022-03-20 04:57:02,645 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 04:57:02,646 INFO L158 Benchmark]: Toolchain (without parser) took 30732.58ms. Allocated memory was 176.2MB in the beginning and 265.3MB in the end (delta: 89.1MB). Free memory was 129.3MB in the beginning and 152.4MB in the end (delta: -23.2MB). Peak memory consumption was 66.7MB. Max. memory is 8.0GB. [2022-03-20 04:57:02,646 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 176.2MB. Free memory is still 145.7MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 04:57:02,647 INFO L158 Benchmark]: CACSL2BoogieTranslator took 282.85ms. Allocated memory is still 176.2MB. Free memory was 129.1MB in the beginning and 153.8MB in the end (delta: -24.7MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-20 04:57:02,648 INFO L158 Benchmark]: Boogie Preprocessor took 38.04ms. Allocated memory is still 176.2MB. Free memory was 153.8MB in the beginning and 152.3MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 04:57:02,648 INFO L158 Benchmark]: RCFGBuilder took 317.32ms. Allocated memory is still 176.2MB. Free memory was 152.3MB in the beginning and 141.7MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-20 04:57:02,648 INFO L158 Benchmark]: IcfgTransformer took 36.22ms. Allocated memory is still 176.2MB. Free memory was 141.7MB in the beginning and 140.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-20 04:57:02,649 INFO L158 Benchmark]: TraceAbstraction took 30053.37ms. Allocated memory was 176.2MB in the beginning and 265.3MB in the end (delta: 89.1MB). Free memory was 139.8MB in the beginning and 152.4MB in the end (delta: -12.7MB). Peak memory consumption was 77.8MB. Max. memory is 8.0GB. [2022-03-20 04:57:02,653 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 176.2MB. Free memory is still 145.7MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 282.85ms. Allocated memory is still 176.2MB. Free memory was 129.1MB in the beginning and 153.8MB in the end (delta: -24.7MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 38.04ms. Allocated memory is still 176.2MB. Free memory was 153.8MB in the beginning and 152.3MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 317.32ms. Allocated memory is still 176.2MB. Free memory was 152.3MB in the beginning and 141.7MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 36.22ms. Allocated memory is still 176.2MB. Free memory was 141.7MB in the beginning and 140.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * TraceAbstraction took 30053.37ms. Allocated memory was 176.2MB in the beginning and 265.3MB in the end (delta: 89.1MB). Free memory was 139.8MB in the beginning and 152.4MB in the end (delta: -12.7MB). Peak memory consumption was 77.8MB. 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: 30.0s, OverallIterations: 15, TraceHistogramMax: 23, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 4.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 241 SdHoareTripleChecker+Valid, 2.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 177 mSDsluCounter, 2743 SdHoareTripleChecker+Invalid, 2.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2141 mSDsCounter, 370 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1671 IncrementalHoareTripleChecker+Invalid, 2041 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 370 mSolverCounterUnsat, 602 mSDtfsCounter, 1671 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1659 GetRequests, 1495 SyntacticMatches, 11 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 9.5s 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, 0.5s SatisfiabilityAnalysisTime, 21.3s InterpolantComputationTime, 985 NumberOfCodeBlocks, 797 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 1470 ConstructedInterpolants, 0 QuantifiedInterpolants, 5631 SizeOfPredicates, 33 NumberOfNonLiveVariables, 1925 ConjunctsInSsa, 252 ConjunctsInUnsatCore, 21 InterpolantComputations, 5 PerfectInterpolantSequences, 6543/6798 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 04:57:02,679 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...