/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_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7390193 [2022-04-05 01:44:04,790 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-05 01:44:04,791 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-05 01:44:04,824 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-05 01:44:04,836 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-05 01:44:04,837 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-05 01:44:04,838 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-05 01:44:04,840 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-05 01:44:04,840 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-05 01:44:04,841 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-05 01:44:04,842 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-05 01:44:04,850 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-05 01:44:04,851 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-05 01:44:04,852 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-05 01:44:04,853 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-05 01:44:04,853 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-05 01:44:04,854 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-05 01:44:04,858 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-05 01:44:04,864 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-05 01:44:04,864 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-05 01:44:04,865 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-05 01:44:04,866 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-04-05 01:44:04,872 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-05 01:44:04,872 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-05 01:44:04,873 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-05 01:44:04,873 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-05 01:44:04,873 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-05 01:44:04,873 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-05 01:44:04,874 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-05 01:44:04,874 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-05 01:44:04,874 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-05 01:44:04,874 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-05 01:44:04,874 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-05 01:44:04,875 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-05 01:44:04,875 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-05 01:44:04,875 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-05 01:44:04,875 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-05 01:44:04,875 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-05 01:44:04,875 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-05 01:44:04,875 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-05 01:44:04,875 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 01:44:04,876 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-05 01:44:04,876 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-05 01:44:04,876 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-05 01:44:04,876 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-05 01:44:05,046 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-05 01:44:05,062 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-05 01:44:05,064 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-05 01:44:05,065 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-05 01:44:05,066 INFO L275 PluginConnector]: CDTParser initialized [2022-04-05 01:44:05,067 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_valuebound20.c [2022-04-05 01:44:05,106 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/16b0e8a49/c37dd516c4834c3e8f07ba0829dda18c/FLAGe6b4bed78 [2022-04-05 01:44:05,436 INFO L306 CDTParser]: Found 1 translation units. [2022-04-05 01:44:05,437 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_valuebound20.c [2022-04-05 01:44:05,440 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/16b0e8a49/c37dd516c4834c3e8f07ba0829dda18c/FLAGe6b4bed78 [2022-04-05 01:44:05,876 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/16b0e8a49/c37dd516c4834c3e8f07ba0829dda18c [2022-04-05 01:44:05,878 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-05 01:44:05,879 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-05 01:44:05,880 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-05 01:44:05,880 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-05 01:44:05,884 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-05 01:44:05,885 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 01:44:05" (1/1) ... [2022-04-05 01:44:05,885 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@708e534a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 01:44:05, skipping insertion in model container [2022-04-05 01:44:05,885 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 01:44:05" (1/1) ... [2022-04-05 01:44:05,889 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-05 01:44:05,900 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-05 01:44:06,008 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_valuebound20.c[588,601] [2022-04-05 01:44:06,020 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 01:44:06,024 INFO L203 MainTranslator]: Completed pre-run [2022-04-05 01:44:06,031 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_valuebound20.c[588,601] [2022-04-05 01:44:06,037 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 01:44:06,048 INFO L208 MainTranslator]: Completed translation [2022-04-05 01:44:06,048 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 01:44:06 WrapperNode [2022-04-05 01:44:06,049 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-05 01:44:06,049 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-05 01:44:06,049 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-05 01:44:06,049 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-05 01:44:06,056 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 01:44:06" (1/1) ... [2022-04-05 01:44:06,056 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 01:44:06" (1/1) ... [2022-04-05 01:44:06,070 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 01:44:06" (1/1) ... [2022-04-05 01:44:06,070 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 01:44:06" (1/1) ... [2022-04-05 01:44:06,073 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 01:44:06" (1/1) ... [2022-04-05 01:44:06,075 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 01:44:06" (1/1) ... [2022-04-05 01:44:06,076 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 01:44:06" (1/1) ... [2022-04-05 01:44:06,077 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-05 01:44:06,077 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-05 01:44:06,077 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-05 01:44:06,077 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-05 01:44:06,078 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 01:44:06" (1/1) ... [2022-04-05 01:44:06,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 01:44:06,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 01:44:06,101 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) [2022-04-05 01:44:06,110 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 [2022-04-05 01:44:06,125 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-05 01:44:06,125 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-05 01:44:06,125 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-05 01:44:06,126 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-05 01:44:06,126 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-05 01:44:06,126 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-05 01:44:06,126 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-05 01:44:06,126 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-05 01:44:06,129 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-05 01:44:06,129 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-05 01:44:06,129 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ushort [2022-04-05 01:44:06,129 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-05 01:44:06,129 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-05 01:44:06,129 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-05 01:44:06,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-05 01:44:06,129 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-05 01:44:06,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-05 01:44:06,129 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-05 01:44:06,129 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-05 01:44:06,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-05 01:44:06,169 INFO L234 CfgBuilder]: Building ICFG [2022-04-05 01:44:06,170 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-05 01:44:06,274 INFO L275 CfgBuilder]: Performing block encoding [2022-04-05 01:44:06,278 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-05 01:44:06,278 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-05 01:44:06,280 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 01:44:06 BoogieIcfgContainer [2022-04-05 01:44:06,280 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-05 01:44:06,281 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-05 01:44:06,281 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-05 01:44:06,282 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-05 01:44:06,284 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 01:44:06" (1/1) ... [2022-04-05 01:44:06,285 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-04-05 01:44:06,300 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 01:44:06 BasicIcfg [2022-04-05 01:44:06,300 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-05 01:44:06,301 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-05 01:44:06,301 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-05 01:44:06,303 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-05 01:44:06,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.04 01:44:05" (1/4) ... [2022-04-05 01:44:06,304 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14e35285 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 01:44:06, skipping insertion in model container [2022-04-05 01:44:06,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 01:44:06" (2/4) ... [2022-04-05 01:44:06,318 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14e35285 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 01:44:06, skipping insertion in model container [2022-04-05 01:44:06,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 01:44:06" (3/4) ... [2022-04-05 01:44:06,319 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14e35285 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 01:44:06, skipping insertion in model container [2022-04-05 01:44:06,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 01:44:06" (4/4) ... [2022-04-05 01:44:06,319 INFO L111 eAbstractionObserver]: Analyzing ICFG cohencu-ll_valuebound20.cJordan [2022-04-05 01:44:06,323 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-04-05 01:44:06,323 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-05 01:44:06,353 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-05 01:44:06,357 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 [2022-04-05 01:44:06,357 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-05 01:44:06,365 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) [2022-04-05 01:44:06,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-05 01:44:06,370 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 01:44:06,370 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 01:44:06,371 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 01:44:06,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 01:44:06,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1231486971, now seen corresponding path program 1 times [2022-04-05 01:44:06,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 01:44:06,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167286130] [2022-04-05 01:44:06,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:44:06,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 01:44:06,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:44:06,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 01:44:06,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:44:06,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-05 01:44:06,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:44:06,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 01:44:06,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 01:44:06,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167286130] [2022-04-05 01:44:06,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167286130] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 01:44:06,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 01:44:06,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-05 01:44:06,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337887647] [2022-04-05 01:44:06,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 01:44:06,522 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-05 01:44:06,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 01:44:06,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-05 01:44:06,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 01:44:06,542 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) [2022-04-05 01:44:06,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 01:44:06,609 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2022-04-05 01:44:06,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-05 01:44:06,611 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 [2022-04-05 01:44:06,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 01:44:06,620 INFO L225 Difference]: With dead ends: 36 [2022-04-05 01:44:06,620 INFO L226 Difference]: Without dead ends: 31 [2022-04-05 01:44:06,621 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 [2022-04-05 01:44:06,623 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2022-04-05 01:44:06,623 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] [2022-04-05 01:44:06,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-04-05 01:44:06,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-04-05 01:44:06,644 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) [2022-04-05 01:44:06,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2022-04-05 01:44:06,646 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 17 [2022-04-05 01:44:06,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 01:44:06,647 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2022-04-05 01:44:06,647 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) [2022-04-05 01:44:06,647 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2022-04-05 01:44:06,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-05 01:44:06,647 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 01:44:06,648 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 01:44:06,648 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-05 01:44:06,648 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 01:44:06,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 01:44:06,649 INFO L85 PathProgramCache]: Analyzing trace with hash -574090659, now seen corresponding path program 1 times [2022-04-05 01:44:06,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 01:44:06,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68046225] [2022-04-05 01:44:06,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:44:06,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 01:44:06,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:44:06,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 01:44:06,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:44:06,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-05 01:44:06,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:44:06,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 01:44:06,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 01:44:06,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68046225] [2022-04-05 01:44:06,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68046225] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 01:44:06,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 01:44:06,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-05 01:44:06,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052264712] [2022-04-05 01:44:06,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 01:44:06,753 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-05 01:44:06,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 01:44:06,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-05 01:44:06,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-05 01:44:06,754 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) [2022-04-05 01:44:06,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 01:44:06,938 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2022-04-05 01:44:06,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-05 01:44:06,939 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 [2022-04-05 01:44:06,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 01:44:06,939 INFO L225 Difference]: With dead ends: 35 [2022-04-05 01:44:06,939 INFO L226 Difference]: Without dead ends: 35 [2022-04-05 01:44:06,940 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-04-05 01:44:06,941 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 [2022-04-05 01:44:06,941 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] [2022-04-05 01:44:06,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-04-05 01:44:06,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-04-05 01:44:06,946 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) [2022-04-05 01:44:06,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2022-04-05 01:44:06,948 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 17 [2022-04-05 01:44:06,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 01:44:06,948 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2022-04-05 01:44:06,948 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) [2022-04-05 01:44:06,948 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2022-04-05 01:44:06,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-05 01:44:06,949 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 01:44:06,949 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] [2022-04-05 01:44:06,949 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-05 01:44:06,949 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 01:44:06,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 01:44:06,950 INFO L85 PathProgramCache]: Analyzing trace with hash 344526146, now seen corresponding path program 1 times [2022-04-05 01:44:06,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 01:44:06,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292621826] [2022-04-05 01:44:06,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:44:06,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 01:44:06,960 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 01:44:06,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1034138628] [2022-04-05 01:44:06,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:44:06,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 01:44:06,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 01:44:06,962 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) [2022-04-05 01:44:06,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-05 01:44:07,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:44:07,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 01:44:07,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 01:44:07,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 01:44:07,101 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 01:44:07,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 01:44:07,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292621826] [2022-04-05 01:44:07,102 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 01:44:07,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034138628] [2022-04-05 01:44:07,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034138628] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 01:44:07,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 01:44:07,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 01:44:07,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526100892] [2022-04-05 01:44:07,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 01:44:07,103 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 01:44:07,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 01:44:07,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 01:44:07,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-05 01:44:07,104 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) [2022-04-05 01:44:07,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 01:44:07,152 INFO L93 Difference]: Finished difference Result 52 states and 71 transitions. [2022-04-05 01:44:07,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 01:44:07,152 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 [2022-04-05 01:44:07,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 01:44:07,153 INFO L225 Difference]: With dead ends: 52 [2022-04-05 01:44:07,153 INFO L226 Difference]: Without dead ends: 52 [2022-04-05 01:44:07,154 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 [2022-04-05 01:44:07,154 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 6 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 01:44:07,155 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 148 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 01:44:07,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-04-05 01:44:07,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2022-04-05 01:44:07,162 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) [2022-04-05 01:44:07,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2022-04-05 01:44:07,163 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 22 [2022-04-05 01:44:07,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 01:44:07,163 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2022-04-05 01:44:07,164 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) [2022-04-05 01:44:07,164 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2022-04-05 01:44:07,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-05 01:44:07,164 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 01:44:07,164 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] [2022-04-05 01:44:07,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-05 01:44:07,379 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 [2022-04-05 01:44:07,380 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 01:44:07,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 01:44:07,380 INFO L85 PathProgramCache]: Analyzing trace with hash 942277242, now seen corresponding path program 1 times [2022-04-05 01:44:07,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 01:44:07,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649512176] [2022-04-05 01:44:07,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:44:07,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 01:44:07,389 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 01:44:07,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [433643766] [2022-04-05 01:44:07,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:44:07,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 01:44:07,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 01:44:07,392 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) [2022-04-05 01:44:07,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-05 01:44:07,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:44:07,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 01:44:07,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 01:44:07,499 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 01:44:07,499 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 01:44:07,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 01:44:07,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649512176] [2022-04-05 01:44:07,500 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 01:44:07,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433643766] [2022-04-05 01:44:07,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433643766] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 01:44:07,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 01:44:07,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 01:44:07,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668007740] [2022-04-05 01:44:07,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 01:44:07,501 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 01:44:07,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 01:44:07,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 01:44:07,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-05 01:44:07,502 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) [2022-04-05 01:44:07,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 01:44:07,538 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2022-04-05 01:44:07,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 01:44:07,539 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 [2022-04-05 01:44:07,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 01:44:07,540 INFO L225 Difference]: With dead ends: 56 [2022-04-05 01:44:07,540 INFO L226 Difference]: Without dead ends: 56 [2022-04-05 01:44:07,540 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 [2022-04-05 01:44:07,541 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 6 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 01:44:07,541 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 149 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 01:44:07,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-04-05 01:44:07,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2022-04-05 01:44:07,546 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) [2022-04-05 01:44:07,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2022-04-05 01:44:07,547 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 27 [2022-04-05 01:44:07,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 01:44:07,547 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2022-04-05 01:44:07,548 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) [2022-04-05 01:44:07,548 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2022-04-05 01:44:07,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-05 01:44:07,548 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 01:44:07,548 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] [2022-04-05 01:44:07,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-05 01:44:07,763 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 [2022-04-05 01:44:07,764 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 01:44:07,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 01:44:07,764 INFO L85 PathProgramCache]: Analyzing trace with hash -881201762, now seen corresponding path program 1 times [2022-04-05 01:44:07,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 01:44:07,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78990247] [2022-04-05 01:44:07,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:44:07,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 01:44:07,774 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 01:44:07,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [585134645] [2022-04-05 01:44:07,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:44:07,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 01:44:07,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 01:44:07,787 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) [2022-04-05 01:44:07,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-05 01:44:07,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:44:07,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-05 01:44:07,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 01:44:07,913 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 01:44:07,913 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 01:44:07,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 01:44:07,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78990247] [2022-04-05 01:44:07,914 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 01:44:07,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585134645] [2022-04-05 01:44:07,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585134645] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 01:44:07,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 01:44:07,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 01:44:07,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184894016] [2022-04-05 01:44:07,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 01:44:07,915 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 01:44:07,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 01:44:07,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 01:44:07,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-05 01:44:07,916 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) [2022-04-05 01:44:07,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 01:44:07,968 INFO L93 Difference]: Finished difference Result 64 states and 80 transitions. [2022-04-05 01:44:07,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 01:44:07,968 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 [2022-04-05 01:44:07,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 01:44:07,970 INFO L225 Difference]: With dead ends: 64 [2022-04-05 01:44:07,970 INFO L226 Difference]: Without dead ends: 54 [2022-04-05 01:44:07,970 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 [2022-04-05 01:44:07,972 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 6 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 01:44:07,973 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 135 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 01:44:07,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-04-05 01:44:07,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-04-05 01:44:07,988 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) [2022-04-05 01:44:07,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2022-04-05 01:44:07,991 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 32 [2022-04-05 01:44:07,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 01:44:07,991 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2022-04-05 01:44:07,991 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) [2022-04-05 01:44:07,992 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2022-04-05 01:44:07,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-05 01:44:07,993 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 01:44:07,993 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] [2022-04-05 01:44:08,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-05 01:44:08,207 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 [2022-04-05 01:44:08,208 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 01:44:08,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 01:44:08,211 INFO L85 PathProgramCache]: Analyzing trace with hash 72164327, now seen corresponding path program 1 times [2022-04-05 01:44:08,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 01:44:08,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303447674] [2022-04-05 01:44:08,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:44:08,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 01:44:08,227 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 01:44:08,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [313292780] [2022-04-05 01:44:08,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:44:08,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 01:44:08,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 01:44:08,230 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) [2022-04-05 01:44:08,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-05 01:44:08,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:44:08,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-05 01:44:08,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 01:44:08,377 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-05 01:44:08,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 01:44:08,487 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-05 01:44:08,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 01:44:08,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303447674] [2022-04-05 01:44:08,488 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 01:44:08,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313292780] [2022-04-05 01:44:08,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313292780] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 01:44:08,488 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 01:44:08,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-04-05 01:44:08,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850676379] [2022-04-05 01:44:08,488 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 01:44:08,488 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-05 01:44:08,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 01:44:08,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-05 01:44:08,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-04-05 01:44:08,489 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) [2022-04-05 01:44:08,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 01:44:08,728 INFO L93 Difference]: Finished difference Result 75 states and 95 transitions. [2022-04-05 01:44:08,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-05 01:44:08,729 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 [2022-04-05 01:44:08,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 01:44:08,730 INFO L225 Difference]: With dead ends: 75 [2022-04-05 01:44:08,730 INFO L226 Difference]: Without dead ends: 75 [2022-04-05 01:44:08,730 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-04-05 01:44:08,730 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 9 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 01:44:08,731 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 144 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 01:44:08,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-04-05 01:44:08,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 62. [2022-04-05 01:44:08,734 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) [2022-04-05 01:44:08,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2022-04-05 01:44:08,735 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 49 [2022-04-05 01:44:08,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 01:44:08,735 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2022-04-05 01:44:08,735 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) [2022-04-05 01:44:08,735 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2022-04-05 01:44:08,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-05 01:44:08,736 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 01:44:08,736 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] [2022-04-05 01:44:08,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-05 01:44:08,936 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 [2022-04-05 01:44:08,937 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 01:44:08,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 01:44:08,937 INFO L85 PathProgramCache]: Analyzing trace with hash 655575797, now seen corresponding path program 2 times [2022-04-05 01:44:08,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 01:44:08,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495967368] [2022-04-05 01:44:08,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:44:08,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 01:44:08,945 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 01:44:08,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [668873735] [2022-04-05 01:44:08,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 01:44:08,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 01:44:08,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 01:44:08,946 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) [2022-04-05 01:44:08,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-05 01:44:08,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 01:44:08,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 01:44:08,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-05 01:44:08,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 01:44:09,099 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-05 01:44:09,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 01:44:09,201 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-05 01:44:09,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 01:44:09,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495967368] [2022-04-05 01:44:09,202 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 01:44:09,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668873735] [2022-04-05 01:44:09,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668873735] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 01:44:09,202 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 01:44:09,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-04-05 01:44:09,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658377759] [2022-04-05 01:44:09,202 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 01:44:09,202 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-05 01:44:09,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 01:44:09,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-05 01:44:09,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-04-05 01:44:09,203 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) [2022-04-05 01:44:09,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 01:44:09,314 INFO L93 Difference]: Finished difference Result 79 states and 98 transitions. [2022-04-05 01:44:09,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-05 01:44:09,314 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 [2022-04-05 01:44:09,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 01:44:09,316 INFO L225 Difference]: With dead ends: 79 [2022-04-05 01:44:09,316 INFO L226 Difference]: Without dead ends: 79 [2022-04-05 01:44:09,316 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 [2022-04-05 01:44:09,317 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 7 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 01:44:09,317 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 198 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 01:44:09,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-04-05 01:44:09,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 70. [2022-04-05 01:44:09,328 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) [2022-04-05 01:44:09,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 81 transitions. [2022-04-05 01:44:09,329 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 81 transitions. Word has length 54 [2022-04-05 01:44:09,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 01:44:09,329 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 81 transitions. [2022-04-05 01:44:09,330 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) [2022-04-05 01:44:09,330 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 81 transitions. [2022-04-05 01:44:09,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-05 01:44:09,335 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 01:44:09,335 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] [2022-04-05 01:44:09,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-05 01:44:09,547 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 [2022-04-05 01:44:09,547 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 01:44:09,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 01:44:09,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1963047427, now seen corresponding path program 3 times [2022-04-05 01:44:09,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 01:44:09,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594442225] [2022-04-05 01:44:09,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:44:09,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 01:44:09,555 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 01:44:09,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [610119530] [2022-04-05 01:44:09,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 01:44:09,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 01:44:09,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 01:44:09,557 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) [2022-04-05 01:44:09,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-05 01:44:09,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-04-05 01:44:09,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 01:44:09,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-05 01:44:09,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 01:44:09,721 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-05 01:44:09,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 01:44:09,908 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-05 01:44:09,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 01:44:09,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594442225] [2022-04-05 01:44:09,909 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 01:44:09,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610119530] [2022-04-05 01:44:09,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610119530] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 01:44:09,909 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 01:44:09,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-04-05 01:44:09,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958369252] [2022-04-05 01:44:09,909 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 01:44:09,909 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-05 01:44:09,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 01:44:09,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-05 01:44:09,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-05 01:44:09,910 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) [2022-04-05 01:44:10,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 01:44:10,112 INFO L93 Difference]: Finished difference Result 91 states and 107 transitions. [2022-04-05 01:44:10,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-05 01:44:10,113 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 [2022-04-05 01:44:10,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 01:44:10,113 INFO L225 Difference]: With dead ends: 91 [2022-04-05 01:44:10,114 INFO L226 Difference]: Without dead ends: 85 [2022-04-05 01:44:10,114 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-04-05 01:44:10,115 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 8 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 01:44:10,115 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 148 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 01:44:10,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-04-05 01:44:10,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 79. [2022-04-05 01:44:10,118 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) [2022-04-05 01:44:10,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 84 transitions. [2022-04-05 01:44:10,119 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 84 transitions. Word has length 59 [2022-04-05 01:44:10,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 01:44:10,119 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 84 transitions. [2022-04-05 01:44:10,119 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) [2022-04-05 01:44:10,119 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 84 transitions. [2022-04-05 01:44:10,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-04-05 01:44:10,120 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 01:44:10,120 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] [2022-04-05 01:44:10,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-05 01:44:10,331 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 [2022-04-05 01:44:10,332 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 01:44:10,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 01:44:10,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1897273453, now seen corresponding path program 1 times [2022-04-05 01:44:10,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 01:44:10,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137943228] [2022-04-05 01:44:10,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:44:10,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 01:44:10,339 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 01:44:10,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1103447439] [2022-04-05 01:44:10,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:44:10,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 01:44:10,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 01:44:10,340 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) [2022-04-05 01:44:10,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-05 01:44:10,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:44:10,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-05 01:44:10,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 01:44:10,605 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-05 01:44:10,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 01:44:10,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 01:44:10,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137943228] [2022-04-05 01:44:10,982 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 01:44:10,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103447439] [2022-04-05 01:44:10,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103447439] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 01:44:10,982 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 01:44:10,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-04-05 01:44:10,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381593472] [2022-04-05 01:44:10,982 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 01:44:10,982 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-05 01:44:10,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 01:44:10,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-05 01:44:10,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-04-05 01:44:10,983 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) [2022-04-05 01:44:11,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 01:44:11,081 INFO L93 Difference]: Finished difference Result 93 states and 101 transitions. [2022-04-05 01:44:11,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-05 01:44:11,081 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 [2022-04-05 01:44:11,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 01:44:11,082 INFO L225 Difference]: With dead ends: 93 [2022-04-05 01:44:11,082 INFO L226 Difference]: Without dead ends: 93 [2022-04-05 01:44:11,082 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-04-05 01:44:11,083 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 01:44:11,083 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 162 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 01:44:11,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-04-05 01:44:11,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2022-04-05 01:44:11,086 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) [2022-04-05 01:44:11,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 100 transitions. [2022-04-05 01:44:11,087 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 100 transitions. Word has length 75 [2022-04-05 01:44:11,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 01:44:11,087 INFO L478 AbstractCegarLoop]: Abstraction has 92 states and 100 transitions. [2022-04-05 01:44:11,087 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) [2022-04-05 01:44:11,087 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 100 transitions. [2022-04-05 01:44:11,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-04-05 01:44:11,088 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 01:44:11,088 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] [2022-04-05 01:44:11,104 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-04-05 01:44:11,288 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 [2022-04-05 01:44:11,288 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 01:44:11,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 01:44:11,289 INFO L85 PathProgramCache]: Analyzing trace with hash -994112719, now seen corresponding path program 1 times [2022-04-05 01:44:11,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 01:44:11,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479217474] [2022-04-05 01:44:11,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:44:11,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 01:44:11,296 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 01:44:11,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1485057865] [2022-04-05 01:44:11,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:44:11,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 01:44:11,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 01:44:11,297 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) [2022-04-05 01:44:11,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-05 01:44:11,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:44:11,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-05 01:44:11,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 01:44:11,857 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 79 proven. 12 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-04-05 01:44:11,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 01:44:19,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 01:44:19,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479217474] [2022-04-05 01:44:19,410 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 01:44:19,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485057865] [2022-04-05 01:44:19,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485057865] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 01:44:19,411 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 01:44:19,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-04-05 01:44:19,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457320312] [2022-04-05 01:44:19,411 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 01:44:19,411 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-05 01:44:19,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 01:44:19,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-05 01:44:19,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-04-05 01:44:19,412 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) [2022-04-05 01:44:20,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 01:44:20,176 INFO L93 Difference]: Finished difference Result 101 states and 107 transitions. [2022-04-05 01:44:20,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-05 01:44:20,177 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 [2022-04-05 01:44:20,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 01:44:20,178 INFO L225 Difference]: With dead ends: 101 [2022-04-05 01:44:20,178 INFO L226 Difference]: Without dead ends: 90 [2022-04-05 01:44:20,179 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2022-04-05 01:44:20,179 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 19 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-05 01:44:20,180 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 134 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-05 01:44:20,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-04-05 01:44:20,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-04-05 01:44:20,186 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) [2022-04-05 01:44:20,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 95 transitions. [2022-04-05 01:44:20,187 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 95 transitions. Word has length 80 [2022-04-05 01:44:20,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 01:44:20,187 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 95 transitions. [2022-04-05 01:44:20,188 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) [2022-04-05 01:44:20,188 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 95 transitions. [2022-04-05 01:44:20,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-04-05 01:44:20,188 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 01:44:20,188 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] [2022-04-05 01:44:20,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-05 01:44:20,389 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 [2022-04-05 01:44:20,389 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 01:44:20,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 01:44:20,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1391751782, now seen corresponding path program 4 times [2022-04-05 01:44:20,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 01:44:20,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344069582] [2022-04-05 01:44:20,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:44:20,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 01:44:20,396 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 01:44:20,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1009686899] [2022-04-05 01:44:20,396 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 01:44:20,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 01:44:20,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 01:44:20,399 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) [2022-04-05 01:44:20,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-05 01:44:20,430 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 01:44:20,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 01:44:20,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-05 01:44:20,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 01:44:20,652 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 24 proven. 15 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-05 01:44:20,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 01:44:20,795 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 24 proven. 15 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-05 01:44:20,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 01:44:20,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344069582] [2022-04-05 01:44:20,795 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 01:44:20,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009686899] [2022-04-05 01:44:20,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009686899] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 01:44:20,795 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 01:44:20,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-04-05 01:44:20,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951289674] [2022-04-05 01:44:20,796 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 01:44:20,796 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-05 01:44:20,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 01:44:20,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-05 01:44:20,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-04-05 01:44:20,797 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) [2022-04-05 01:44:21,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 01:44:21,110 INFO L93 Difference]: Finished difference Result 104 states and 116 transitions. [2022-04-05 01:44:21,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-05 01:44:21,111 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 [2022-04-05 01:44:21,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 01:44:21,112 INFO L225 Difference]: With dead ends: 104 [2022-04-05 01:44:21,112 INFO L226 Difference]: Without dead ends: 104 [2022-04-05 01:44:21,112 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 [2022-04-05 01:44:21,112 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 12 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-05 01:44:21,113 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 123 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-05 01:44:21,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-04-05 01:44:21,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 94. [2022-04-05 01:44:21,115 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) [2022-04-05 01:44:21,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 98 transitions. [2022-04-05 01:44:21,116 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 98 transitions. Word has length 81 [2022-04-05 01:44:21,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 01:44:21,116 INFO L478 AbstractCegarLoop]: Abstraction has 94 states and 98 transitions. [2022-04-05 01:44:21,116 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) [2022-04-05 01:44:21,116 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 98 transitions. [2022-04-05 01:44:21,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-05 01:44:21,117 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 01:44:21,117 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] [2022-04-05 01:44:21,133 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-04-05 01:44:21,332 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 [2022-04-05 01:44:21,333 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 01:44:21,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 01:44:21,333 INFO L85 PathProgramCache]: Analyzing trace with hash 574631438, now seen corresponding path program 2 times [2022-04-05 01:44:21,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 01:44:21,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837518114] [2022-04-05 01:44:21,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:44:21,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 01:44:21,342 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 01:44:21,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1641534506] [2022-04-05 01:44:21,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 01:44:21,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 01:44:21,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 01:44:21,345 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) [2022-04-05 01:44:21,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-05 01:44:21,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 01:44:21,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 01:44:21,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-05 01:44:21,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 01:44:21,701 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 32 proven. 21 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-05 01:44:21,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 01:44:21,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 01:44:21,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837518114] [2022-04-05 01:44:21,967 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 01:44:21,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641534506] [2022-04-05 01:44:21,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641534506] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 01:44:21,967 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 01:44:21,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-04-05 01:44:21,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477765823] [2022-04-05 01:44:21,968 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 01:44:21,968 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-05 01:44:21,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 01:44:21,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-05 01:44:21,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-04-05 01:44:21,968 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) [2022-04-05 01:44:22,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 01:44:22,109 INFO L93 Difference]: Finished difference Result 116 states and 125 transitions. [2022-04-05 01:44:22,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-05 01:44:22,110 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 [2022-04-05 01:44:22,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 01:44:22,110 INFO L225 Difference]: With dead ends: 116 [2022-04-05 01:44:22,111 INFO L226 Difference]: Without dead ends: 116 [2022-04-05 01:44:22,111 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-04-05 01:44:22,111 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 6 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 01:44:22,111 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 198 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 01:44:22,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-04-05 01:44:22,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2022-04-05 01:44:22,114 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) [2022-04-05 01:44:22,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 124 transitions. [2022-04-05 01:44:22,115 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 124 transitions. Word has length 102 [2022-04-05 01:44:22,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 01:44:22,115 INFO L478 AbstractCegarLoop]: Abstraction has 115 states and 124 transitions. [2022-04-05 01:44:22,115 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) [2022-04-05 01:44:22,115 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 124 transitions. [2022-04-05 01:44:22,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-04-05 01:44:22,116 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 01:44:22,116 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] [2022-04-05 01:44:22,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-05 01:44:22,331 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 [2022-04-05 01:44:22,332 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 01:44:22,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 01:44:22,332 INFO L85 PathProgramCache]: Analyzing trace with hash 474519958, now seen corresponding path program 2 times [2022-04-05 01:44:22,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 01:44:22,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861029259] [2022-04-05 01:44:22,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:44:22,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 01:44:22,338 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 01:44:22,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2025798813] [2022-04-05 01:44:22,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 01:44:22,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 01:44:22,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 01:44:22,339 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) [2022-04-05 01:44:22,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-05 01:44:22,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 01:44:22,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 01:44:22,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-05 01:44:22,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 01:44:22,653 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 34 proven. 21 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-04-05 01:44:22,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 01:44:22,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 01:44:22,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861029259] [2022-04-05 01:44:22,808 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 01:44:22,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025798813] [2022-04-05 01:44:22,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025798813] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 01:44:22,808 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 01:44:22,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-04-05 01:44:22,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563590052] [2022-04-05 01:44:22,808 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 01:44:22,809 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-05 01:44:22,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 01:44:22,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-05 01:44:22,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-04-05 01:44:22,809 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) [2022-04-05 01:44:22,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 01:44:22,937 INFO L93 Difference]: Finished difference Result 124 states and 131 transitions. [2022-04-05 01:44:22,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-05 01:44:22,937 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 [2022-04-05 01:44:22,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 01:44:22,938 INFO L225 Difference]: With dead ends: 124 [2022-04-05 01:44:22,938 INFO L226 Difference]: Without dead ends: 113 [2022-04-05 01:44:22,938 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 [2022-04-05 01:44:22,939 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 6 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 01:44:22,939 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 207 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 01:44:22,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-04-05 01:44:22,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2022-04-05 01:44:22,941 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) [2022-04-05 01:44:22,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 119 transitions. [2022-04-05 01:44:22,942 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 119 transitions. Word has length 107 [2022-04-05 01:44:22,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 01:44:22,942 INFO L478 AbstractCegarLoop]: Abstraction has 113 states and 119 transitions. [2022-04-05 01:44:22,942 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) [2022-04-05 01:44:22,942 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 119 transitions. [2022-04-05 01:44:22,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-04-05 01:44:22,943 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 01:44:22,943 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] [2022-04-05 01:44:22,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-05 01:44:23,158 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 [2022-04-05 01:44:23,159 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 01:44:23,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 01:44:23,159 INFO L85 PathProgramCache]: Analyzing trace with hash 94155443, now seen corresponding path program 3 times [2022-04-05 01:44:23,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 01:44:23,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160346817] [2022-04-05 01:44:23,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:44:23,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 01:44:23,165 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 01:44:23,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [64232219] [2022-04-05 01:44:23,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 01:44:23,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 01:44:23,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 01:44:23,169 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) [2022-04-05 01:44:23,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-05 01:44:23,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-04-05 01:44:23,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 01:44:23,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-05 01:44:23,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 01:44:23,886 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 107 proven. 16 refuted. 0 times theorem prover too weak. 801 trivial. 0 not checked. [2022-04-05 01:44:23,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 01:44:24,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 01:44:24,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160346817] [2022-04-05 01:44:24,051 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 01:44:24,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64232219] [2022-04-05 01:44:24,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64232219] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 01:44:24,051 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 01:44:24,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-04-05 01:44:24,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464153360] [2022-04-05 01:44:24,051 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 01:44:24,051 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-05 01:44:24,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 01:44:24,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-05 01:44:24,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-04-05 01:44:24,052 INFO L87 Difference]: Start difference. First operand 113 states and 119 transitions. Second operand has 13 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 6 states have call successors, (13) [2022-04-05 01:44:24,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 01:44:24,398 INFO L93 Difference]: Finished difference Result 117 states and 122 transitions. [2022-04-05 01:44:24,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-05 01:44:24,398 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 6 states have call successors, (13) Word has length 129 [2022-04-05 01:44:24,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 01:44:24,399 INFO L225 Difference]: With dead ends: 117 [2022-04-05 01:44:24,399 INFO L226 Difference]: Without dead ends: 115 [2022-04-05 01:44:24,399 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-04-05 01:44:24,400 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 16 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-05 01:44:24,400 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 94 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-05 01:44:24,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-04-05 01:44:24,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2022-04-05 01:44:24,402 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) [2022-04-05 01:44:24,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 120 transitions. [2022-04-05 01:44:24,403 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 120 transitions. Word has length 129 [2022-04-05 01:44:24,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 01:44:24,403 INFO L478 AbstractCegarLoop]: Abstraction has 115 states and 120 transitions. [2022-04-05 01:44:24,403 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 6 states have call successors, (13) [2022-04-05 01:44:24,403 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 120 transitions. [2022-04-05 01:44:24,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-04-05 01:44:24,404 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 01:44:24,404 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] [2022-04-05 01:44:24,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-05 01:44:24,609 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 [2022-04-05 01:44:24,610 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 01:44:24,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 01:44:24,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1269707793, now seen corresponding path program 3 times [2022-04-05 01:44:24,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 01:44:24,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605360655] [2022-04-05 01:44:24,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:44:24,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 01:44:24,616 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 01:44:24,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2000328486] [2022-04-05 01:44:24,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 01:44:24,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 01:44:24,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 01:44:24,617 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) [2022-04-05 01:44:24,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-05 01:44:25,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-04-05 01:44:25,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 01:44:25,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 48 conjunts are in the unsatisfiable core [2022-04-05 01:44:25,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 01:45:05,383 WARN L855 $PredicateComparison]: unable to prove that (exists ((aux_div_v_main_~z~0_BEFORE_CALL_146_45 Int) (main_~x~0 Int) (v_main_~a~0_BEFORE_CALL_109 Int) (aux_mod_v_main_~z~0_BEFORE_CALL_146_45 Int) (v_main_~y~0_BEFORE_CALL_139 Int)) (and (= (+ (* 36 (* aux_div_v_main_~z~0_BEFORE_CALL_146_45 aux_div_v_main_~z~0_BEFORE_CALL_146_45)) (* aux_mod_v_main_~z~0_BEFORE_CALL_146_45 6) (* (* aux_mod_v_main_~z~0_BEFORE_CALL_146_45 aux_div_v_main_~z~0_BEFORE_CALL_146_45) 12) (* aux_mod_v_main_~z~0_BEFORE_CALL_146_45 aux_mod_v_main_~z~0_BEFORE_CALL_146_45) 12 (* 36 aux_div_v_main_~z~0_BEFORE_CALL_146_45)) (* v_main_~y~0_BEFORE_CALL_139 12)) (<= (div (+ (* aux_mod_v_main_~z~0_BEFORE_CALL_146_45 (- 12) aux_div_v_main_~z~0_BEFORE_CALL_146_45) (* (- 1) aux_mod_v_main_~z~0_BEFORE_CALL_146_45 aux_mod_v_main_~z~0_BEFORE_CALL_146_45) (* v_main_~y~0_BEFORE_CALL_139 6 aux_div_v_main_~z~0_BEFORE_CALL_146_45) (* aux_mod_v_main_~z~0_BEFORE_CALL_146_45 v_main_~y~0_BEFORE_CALL_139) (* 84 aux_div_v_main_~z~0_BEFORE_CALL_146_45) (* (- 36) aux_div_v_main_~z~0_BEFORE_CALL_146_45 aux_div_v_main_~z~0_BEFORE_CALL_146_45) (- 6) (* aux_mod_v_main_~z~0_BEFORE_CALL_146_45 14) (* v_main_~y~0_BEFORE_CALL_139 6)) 18) (+ (* 6 aux_div_v_main_~z~0_BEFORE_CALL_146_45) aux_mod_v_main_~z~0_BEFORE_CALL_146_45 main_~x~0)) (<= 0 v_main_~a~0_BEFORE_CALL_109) (<= 0 aux_mod_v_main_~z~0_BEFORE_CALL_146_45) (<= 1 |c___VERIFIER_assert_#in~cond|) (< v_main_~a~0_BEFORE_CALL_109 aux_div_v_main_~z~0_BEFORE_CALL_146_45) (<= v_main_~a~0_BEFORE_CALL_109 20) (= (+ (* 6 (* main_~x~0 aux_div_v_main_~z~0_BEFORE_CALL_146_45)) (* aux_mod_v_main_~z~0_BEFORE_CALL_146_45 main_~x~0)) (+ (* main_~x~0 6) (* (* v_main_~a~0_BEFORE_CALL_109 main_~x~0) 6))))) is different from true [2022-04-05 01:45:05,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 259 proven. 76 refuted. 0 times theorem prover too weak. 675 trivial. 0 not checked. [2022-04-05 01:45:05,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 01:45:10,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 204 proven. 34 refuted. 0 times theorem prover too weak. 772 trivial. 0 not checked. [2022-04-05 01:45:10,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 01:45:10,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605360655] [2022-04-05 01:45:10,329 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 01:45:10,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000328486] [2022-04-05 01:45:10,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000328486] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 01:45:10,329 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 01:45:10,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 23 [2022-04-05 01:45:10,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719597056] [2022-04-05 01:45:10,329 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 01:45:10,330 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-05 01:45:10,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 01:45:10,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-05 01:45:10,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=372, Unknown=3, NotChecked=40, Total=506 [2022-04-05 01:45:10,330 INFO L87 Difference]: Start difference. First operand 115 states and 120 transitions. Second operand has 23 states, 18 states have (on average 2.0) internal successors, (36), 15 states have internal predecessors, (36), 13 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2022-04-05 01:45:17,013 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 01:45:22,713 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 01:45:24,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 01:45:24,506 INFO L93 Difference]: Finished difference Result 117 states and 121 transitions. [2022-04-05 01:45:24,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-05 01:45:24,506 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 18 states have (on average 2.0) internal successors, (36), 15 states have internal predecessors, (36), 13 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) Word has length 134 [2022-04-05 01:45:24,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 01:45:24,506 INFO L225 Difference]: With dead ends: 117 [2022-04-05 01:45:24,506 INFO L226 Difference]: Without dead ends: 0 [2022-04-05 01:45:24,507 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 245 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 22.6s TimeCoverageRelationStatistics Valid=149, Invalid=607, Unknown=4, NotChecked=52, Total=812 [2022-04-05 01:45:24,507 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 18 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 36 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-04-05 01:45:24,507 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 148 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 221 Invalid, 1 Unknown, 59 Unchecked, 5.9s Time] [2022-04-05 01:45:24,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-05 01:45:24,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-05 01:45:24,508 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) [2022-04-05 01:45:24,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-05 01:45:24,508 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 134 [2022-04-05 01:45:24,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 01:45:24,508 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-05 01:45:24,508 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 18 states have (on average 2.0) internal successors, (36), 15 states have internal predecessors, (36), 13 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2022-04-05 01:45:24,508 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-05 01:45:24,508 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-05 01:45:24,510 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-05 01:45:24,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-05 01:45:24,714 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 [2022-04-05 01:45:24,717 INFO L719 BasicCegarLoop]: Path program histogram: [4, 3, 3, 1, 1, 1, 1, 1] [2022-04-05 01:45:24,718 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-05 01:45:24,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 01:45:24 BasicIcfg [2022-04-05 01:45:24,719 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-05 01:45:24,720 INFO L158 Benchmark]: Toolchain (without parser) took 78840.16ms. Allocated memory was 189.8MB in the beginning and 233.8MB in the end (delta: 44.0MB). Free memory was 140.7MB in the beginning and 91.4MB in the end (delta: 49.3MB). Peak memory consumption was 93.7MB. Max. memory is 8.0GB. [2022-04-05 01:45:24,720 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 189.8MB. Free memory was 157.0MB in the beginning and 156.9MB in the end (delta: 150.4kB). There was no memory consumed. Max. memory is 8.0GB. [2022-04-05 01:45:24,720 INFO L158 Benchmark]: CACSL2BoogieTranslator took 168.35ms. Allocated memory is still 189.8MB. Free memory was 140.6MB in the beginning and 164.9MB in the end (delta: -24.3MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-04-05 01:45:24,720 INFO L158 Benchmark]: Boogie Preprocessor took 27.61ms. Allocated memory is still 189.8MB. Free memory was 164.9MB in the beginning and 163.5MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-05 01:45:24,720 INFO L158 Benchmark]: RCFGBuilder took 202.53ms. Allocated memory is still 189.8MB. Free memory was 163.5MB in the beginning and 153.0MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-04-05 01:45:24,720 INFO L158 Benchmark]: IcfgTransformer took 19.01ms. Allocated memory is still 189.8MB. Free memory was 153.0MB in the beginning and 151.7MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-05 01:45:24,721 INFO L158 Benchmark]: TraceAbstraction took 78418.07ms. Allocated memory was 189.8MB in the beginning and 233.8MB in the end (delta: 44.0MB). Free memory was 150.9MB in the beginning and 91.4MB in the end (delta: 59.5MB). Peak memory consumption was 104.6MB. Max. memory is 8.0GB. [2022-04-05 01:45:24,721 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 189.8MB. Free memory was 157.0MB in the beginning and 156.9MB in the end (delta: 150.4kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 168.35ms. Allocated memory is still 189.8MB. Free memory was 140.6MB in the beginning and 164.9MB in the end (delta: -24.3MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 27.61ms. Allocated memory is still 189.8MB. Free memory was 164.9MB in the beginning and 163.5MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 202.53ms. Allocated memory is still 189.8MB. Free memory was 163.5MB in the beginning and 153.0MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 19.01ms. Allocated memory is still 189.8MB. Free memory was 153.0MB in the beginning and 151.7MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 78418.07ms. Allocated memory was 189.8MB in the beginning and 233.8MB in the end (delta: 44.0MB). Free memory was 150.9MB in the beginning and 91.4MB in the end (delta: 59.5MB). Peak memory consumption was 104.6MB. 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: 78.4s, OverallIterations: 15, TraceHistogramMax: 23, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 17.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 227 SdHoareTripleChecker+Valid, 7.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 162 mSDsluCounter, 2068 SdHoareTripleChecker+Invalid, 7.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 59 IncrementalHoareTripleChecker+Unchecked, 1466 mSDsCounter, 314 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2355 IncrementalHoareTripleChecker+Invalid, 2729 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 314 mSolverCounterUnsat, 602 mSDtfsCounter, 2355 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1538 GetRequests, 1370 SyntacticMatches, 13 SemanticMatches, 155 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 29.2s 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, 0.9s SatisfiabilityAnalysisTime, 57.1s InterpolantComputationTime, 985 NumberOfCodeBlocks, 796 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 1342 ConstructedInterpolants, 2 QuantifiedInterpolants, 5877 SizeOfPredicates, 34 NumberOfNonLiveVariables, 1921 ConjunctsInSsa, 259 ConjunctsInUnsatCore, 20 InterpolantComputations, 5 PerfectInterpolantSequences, 5633/5874 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-04-05 01:45:24,744 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...