/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/sqrt1-ll_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 18:42:02,481 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 18:42:02,501 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 18:42:02,546 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-17 18:42:02,547 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-17 18:42:02,548 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-17 18:42:02,550 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-17 18:42:02,552 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-17 18:42:02,554 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-17 18:42:02,558 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-17 18:42:02,559 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-17 18:42:02,561 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-17 18:42:02,561 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 18:42:02,566 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 18:42:02,567 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 18:42:02,569 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 18:42:02,570 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 18:42:02,571 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 18:42:02,573 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 18:42:02,577 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 18:42:02,579 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 18:42:02,580 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 18:42:02,581 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 18:42:02,582 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 18:42:02,583 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 18:42:02,589 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-17 18:42:02,597 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 18:42:02,598 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 18:42:02,600 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 18:42:02,600 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-17 18:42:02,611 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 18:42:02,612 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 18:42:02,614 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 18:42:02,614 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-17 18:42:02,614 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 18:42:02,614 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-17 18:42:02,615 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 18:42:02,615 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 18:42:02,615 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 18:42:02,616 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 18:42:02,616 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-17 18:42:02,616 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 18:42:02,616 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 18:42:02,616 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 18:42:02,617 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 18:42:02,617 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 18:42:02,617 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-17 18:42:02,617 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 18:42:02,617 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 18:42:02,618 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 18:42:02,618 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 18:42:02,619 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 18:42:02,619 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 18:42:02,821 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 18:42:02,849 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 18:42:02,851 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 18:42:02,853 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 18:42:02,854 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 18:42:02,855 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_unwindbound5.c [2022-03-17 18:42:02,917 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df5cbc6ac/be5dce6305e84470989a666bd0f0eb61/FLAGe861c05de [2022-03-17 18:42:03,297 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 18:42:03,298 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_unwindbound5.c [2022-03-17 18:42:03,303 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df5cbc6ac/be5dce6305e84470989a666bd0f0eb61/FLAGe861c05de [2022-03-17 18:42:03,727 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df5cbc6ac/be5dce6305e84470989a666bd0f0eb61 [2022-03-17 18:42:03,729 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 18:42:03,730 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 18:42:03,736 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 18:42:03,736 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 18:42:03,742 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 18:42:03,743 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 06:42:03" (1/1) ... [2022-03-17 18:42:03,744 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66be5315 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:42:03, skipping insertion in model container [2022-03-17 18:42:03,744 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 06:42:03" (1/1) ... [2022-03-17 18:42:03,752 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 18:42:03,765 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 18:42:03,898 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/sqrt1-ll_unwindbound5.c[520,533] [2022-03-17 18:42:03,914 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 18:42:03,920 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 18:42:03,928 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/sqrt1-ll_unwindbound5.c[520,533] [2022-03-17 18:42:03,933 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 18:42:03,943 INFO L208 MainTranslator]: Completed translation [2022-03-17 18:42:03,944 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:42:03 WrapperNode [2022-03-17 18:42:03,944 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 18:42:03,945 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 18:42:03,945 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 18:42:03,945 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 18:42:03,955 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:42:03" (1/1) ... [2022-03-17 18:42:03,955 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:42:03" (1/1) ... [2022-03-17 18:42:03,963 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:42:03" (1/1) ... [2022-03-17 18:42:03,964 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:42:03" (1/1) ... [2022-03-17 18:42:03,968 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:42:03" (1/1) ... [2022-03-17 18:42:03,972 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:42:03" (1/1) ... [2022-03-17 18:42:03,973 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:42:03" (1/1) ... [2022-03-17 18:42:03,974 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 18:42:03,975 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 18:42:03,975 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 18:42:03,975 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 18:42:03,977 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:42:03" (1/1) ... [2022-03-17 18:42:03,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 18:42:03,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 18:42:04,017 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-17 18:42:04,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-17 18:42:04,053 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 18:42:04,054 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 18:42:04,054 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 18:42:04,054 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-17 18:42:04,054 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 18:42:04,054 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 18:42:04,054 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 18:42:04,054 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 18:42:04,054 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 18:42:04,055 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 18:42:04,055 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-17 18:42:04,055 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-17 18:42:04,055 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 18:42:04,055 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 18:42:04,055 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 18:42:04,055 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 18:42:04,055 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 18:42:04,055 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 18:42:04,056 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 18:42:04,056 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 18:42:04,108 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 18:42:04,109 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 18:42:04,237 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 18:42:04,242 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 18:42:04,242 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-17 18:42:04,244 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 06:42:04 BoogieIcfgContainer [2022-03-17 18:42:04,244 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 18:42:04,244 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 18:42:04,245 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 18:42:04,245 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 18:42:04,248 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 06:42:04" (1/1) ... [2022-03-17 18:42:04,275 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 06:42:04 BasicIcfg [2022-03-17 18:42:04,275 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 18:42:04,276 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 18:42:04,277 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 18:42:04,279 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 18:42:04,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 06:42:03" (1/4) ... [2022-03-17 18:42:04,286 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a7650ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 06:42:04, skipping insertion in model container [2022-03-17 18:42:04,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:42:03" (2/4) ... [2022-03-17 18:42:04,286 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a7650ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 06:42:04, skipping insertion in model container [2022-03-17 18:42:04,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 06:42:04" (3/4) ... [2022-03-17 18:42:04,287 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a7650ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 06:42:04, skipping insertion in model container [2022-03-17 18:42:04,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 06:42:04" (4/4) ... [2022-03-17 18:42:04,288 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_unwindbound5.cJordan [2022-03-17 18:42:04,292 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-17 18:42:04,293 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 18:42:04,358 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 18:42:04,364 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-17 18:42:04,364 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 18:42:04,389 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-17 18:42:04,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-17 18:42:04,396 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:42:04,396 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:42:04,397 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:42:04,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:42:04,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1238828824, now seen corresponding path program 1 times [2022-03-17 18:42:04,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:42:04,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338261955] [2022-03-17 18:42:04,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:42:04,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:42:04,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:42:04,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 18:42:04,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:42:04,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 18:42:04,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:42:04,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338261955] [2022-03-17 18:42:04,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338261955] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 18:42:04,618 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 18:42:04,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-17 18:42:04,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180418287] [2022-03-17 18:42:04,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 18:42:04,625 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-17 18:42:04,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:42:04,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-17 18:42:04,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 18:42:04,657 INFO L87 Difference]: Start difference. First operand has 26 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:42:04,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:42:04,741 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2022-03-17 18:42:04,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-17 18:42:04,744 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-03-17 18:42:04,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:42:04,752 INFO L225 Difference]: With dead ends: 27 [2022-03-17 18:42:04,752 INFO L226 Difference]: Without dead ends: 22 [2022-03-17 18:42:04,755 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 18:42:04,761 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 18:42:04,762 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 35 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 18:42:04,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-03-17 18:42:04,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2022-03-17 18:42:04,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-17 18:42:04,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2022-03-17 18:42:04,808 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 11 [2022-03-17 18:42:04,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:42:04,809 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2022-03-17 18:42:04,809 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:42:04,809 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2022-03-17 18:42:04,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-17 18:42:04,810 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:42:04,810 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:42:04,811 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 18:42:04,811 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:42:04,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:42:04,814 INFO L85 PathProgramCache]: Analyzing trace with hash -221581531, now seen corresponding path program 1 times [2022-03-17 18:42:04,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:42:04,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537965671] [2022-03-17 18:42:04,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:42:04,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:42:04,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:42:04,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 18:42:04,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:42:04,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 18:42:04,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:42:04,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537965671] [2022-03-17 18:42:04,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537965671] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 18:42:04,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 18:42:04,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 18:42:04,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142311402] [2022-03-17 18:42:04,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 18:42:04,949 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 18:42:04,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:42:04,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 18:42:04,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-17 18:42:04,950 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:42:05,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:42:05,052 INFO L93 Difference]: Finished difference Result 23 states and 29 transitions. [2022-03-17 18:42:05,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 18:42:05,053 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-17 18:42:05,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:42:05,054 INFO L225 Difference]: With dead ends: 23 [2022-03-17 18:42:05,054 INFO L226 Difference]: Without dead ends: 23 [2022-03-17 18:42:05,055 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-17 18:42:05,056 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 18:42:05,056 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 49 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 18:42:05,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-03-17 18:42:05,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-03-17 18:42:05,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-17 18:42:05,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2022-03-17 18:42:05,062 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 12 [2022-03-17 18:42:05,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:42:05,062 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2022-03-17 18:42:05,062 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:42:05,062 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2022-03-17 18:42:05,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-17 18:42:05,063 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:42:05,063 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:42:05,063 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-17 18:42:05,063 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:42:05,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:42:05,064 INFO L85 PathProgramCache]: Analyzing trace with hash -220509055, now seen corresponding path program 1 times [2022-03-17 18:42:05,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:42:05,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786515474] [2022-03-17 18:42:05,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:42:05,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:42:05,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:42:05,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 18:42:05,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:42:05,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 18:42:05,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:42:05,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786515474] [2022-03-17 18:42:05,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786515474] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 18:42:05,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 18:42:05,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-17 18:42:05,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39127826] [2022-03-17 18:42:05,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 18:42:05,166 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 18:42:05,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:42:05,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 18:42:05,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-17 18:42:05,168 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:42:05,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:42:05,322 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2022-03-17 18:42:05,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-17 18:42:05,323 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-17 18:42:05,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:42:05,324 INFO L225 Difference]: With dead ends: 34 [2022-03-17 18:42:05,324 INFO L226 Difference]: Without dead ends: 34 [2022-03-17 18:42:05,325 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-17 18:42:05,326 INFO L912 BasicCegarLoop]: 26 mSDtfsCounter, 16 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 18:42:05,326 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 65 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 18:42:05,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-17 18:42:05,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2022-03-17 18:42:05,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 16 states have (on average 1.25) internal successors, (20), 18 states have internal predecessors, (20), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-17 18:42:05,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2022-03-17 18:42:05,334 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 12 [2022-03-17 18:42:05,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:42:05,334 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2022-03-17 18:42:05,334 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 18:42:05,334 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2022-03-17 18:42:05,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-17 18:42:05,335 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:42:05,335 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:42:05,335 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-17 18:42:05,336 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:42:05,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:42:05,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1748396925, now seen corresponding path program 1 times [2022-03-17 18:42:05,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:42:05,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67277401] [2022-03-17 18:42:05,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:42:05,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:42:05,346 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 18:42:05,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1807216368] [2022-03-17 18:42:05,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:42:05,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 18:42:05,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 18:42:05,351 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 18:42:05,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-17 18:42:05,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:42:05,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 18:42:05,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 18:42:05,572 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 18:42:05,572 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 18:42:05,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:42:05,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67277401] [2022-03-17 18:42:05,577 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 18:42:05,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807216368] [2022-03-17 18:42:05,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807216368] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 18:42:05,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 18:42:05,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 18:42:05,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588095564] [2022-03-17 18:42:05,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 18:42:05,580 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 18:42:05,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:42:05,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 18:42:05,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-17 18:42:05,581 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 18:42:05,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:42:05,613 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2022-03-17 18:42:05,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 18:42:05,614 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2022-03-17 18:42:05,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:42:05,617 INFO L225 Difference]: With dead ends: 38 [2022-03-17 18:42:05,617 INFO L226 Difference]: Without dead ends: 38 [2022-03-17 18:42:05,617 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-17 18:42:05,618 INFO L912 BasicCegarLoop]: 29 mSDtfsCounter, 6 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 18:42:05,619 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 100 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 18:42:05,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-17 18:42:05,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2022-03-17 18:42:05,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-17 18:42:05,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2022-03-17 18:42:05,625 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 17 [2022-03-17 18:42:05,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:42:05,625 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2022-03-17 18:42:05,625 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 18:42:05,626 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2022-03-17 18:42:05,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-17 18:42:05,626 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:42:05,626 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:42:05,656 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-17 18:42:05,855 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 18:42:05,856 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:42:05,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:42:05,856 INFO L85 PathProgramCache]: Analyzing trace with hash -214718627, now seen corresponding path program 1 times [2022-03-17 18:42:05,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:42:05,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541965441] [2022-03-17 18:42:05,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:42:05,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:42:05,866 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 18:42:05,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [859398776] [2022-03-17 18:42:05,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:42:05,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 18:42:05,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 18:42:05,871 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 18:42:05,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-17 18:42:05,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:42:05,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 18:42:05,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 18:42:05,992 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 18:42:05,992 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 18:42:05,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:42:05,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541965441] [2022-03-17 18:42:05,993 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 18:42:05,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859398776] [2022-03-17 18:42:05,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859398776] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 18:42:05,993 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 18:42:05,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 18:42:05,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497649106] [2022-03-17 18:42:05,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 18:42:05,994 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 18:42:05,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:42:05,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 18:42:05,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-17 18:42:05,995 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-17 18:42:06,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:42:06,024 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2022-03-17 18:42:06,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 18:42:06,025 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-03-17 18:42:06,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:42:06,026 INFO L225 Difference]: With dead ends: 42 [2022-03-17 18:42:06,026 INFO L226 Difference]: Without dead ends: 39 [2022-03-17 18:42:06,026 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-17 18:42:06,027 INFO L912 BasicCegarLoop]: 32 mSDtfsCounter, 6 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 18:42:06,028 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 109 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 18:42:06,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-17 18:42:06,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-03-17 18:42:06,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 11 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-17 18:42:06,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2022-03-17 18:42:06,033 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 22 [2022-03-17 18:42:06,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:42:06,034 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2022-03-17 18:42:06,034 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-17 18:42:06,034 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2022-03-17 18:42:06,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-17 18:42:06,035 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:42:06,035 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:42:06,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-17 18:42:06,249 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 18:42:06,249 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:42:06,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:42:06,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1697115236, now seen corresponding path program 1 times [2022-03-17 18:42:06,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:42:06,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057699694] [2022-03-17 18:42:06,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:42:06,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:42:06,261 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 18:42:06,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [608834421] [2022-03-17 18:42:06,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:42:06,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 18:42:06,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 18:42:06,268 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 18:42:06,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-17 18:42:06,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:42:06,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 18:42:06,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 18:42:06,409 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 18:42:06,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 18:42:06,506 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 18:42:06,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:42:06,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057699694] [2022-03-17 18:42:06,507 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 18:42:06,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608834421] [2022-03-17 18:42:06,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608834421] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 18:42:06,508 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 18:42:06,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-03-17 18:42:06,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805638609] [2022-03-17 18:42:06,508 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 18:42:06,508 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-17 18:42:06,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:42:06,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-17 18:42:06,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-17 18:42:06,509 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-17 18:42:06,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:42:06,624 INFO L93 Difference]: Finished difference Result 71 states and 87 transitions. [2022-03-17 18:42:06,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-17 18:42:06,625 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 30 [2022-03-17 18:42:06,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:42:06,626 INFO L225 Difference]: With dead ends: 71 [2022-03-17 18:42:06,626 INFO L226 Difference]: Without dead ends: 71 [2022-03-17 18:42:06,626 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-03-17 18:42:06,627 INFO L912 BasicCegarLoop]: 38 mSDtfsCounter, 49 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 18:42:06,627 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 116 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 18:42:06,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-03-17 18:42:06,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2022-03-17 18:42:06,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 39 states have internal predecessors, (43), 23 states have call successors, (23), 8 states have call predecessors, (23), 7 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-17 18:42:06,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 85 transitions. [2022-03-17 18:42:06,637 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 85 transitions. Word has length 30 [2022-03-17 18:42:06,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:42:06,637 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 85 transitions. [2022-03-17 18:42:06,638 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-17 18:42:06,638 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 85 transitions. [2022-03-17 18:42:06,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-17 18:42:06,639 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:42:06,639 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:42:06,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-17 18:42:06,863 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 18:42:06,864 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:42:06,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:42:06,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1698187712, now seen corresponding path program 1 times [2022-03-17 18:42:06,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:42:06,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512650754] [2022-03-17 18:42:06,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:42:06,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:42:06,873 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 18:42:06,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1419441508] [2022-03-17 18:42:06,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:42:06,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 18:42:06,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 18:42:06,879 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 18:42:06,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-17 18:42:06,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:42:06,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-17 18:42:06,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 18:42:07,054 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 18:42:07,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 18:42:07,142 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-17 18:42:07,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:42:07,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512650754] [2022-03-17 18:42:07,143 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 18:42:07,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419441508] [2022-03-17 18:42:07,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419441508] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 18:42:07,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-17 18:42:07,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-03-17 18:42:07,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879739360] [2022-03-17 18:42:07,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 18:42:07,144 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 18:42:07,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:42:07,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 18:42:07,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-17 18:42:07,145 INFO L87 Difference]: Start difference. First operand 67 states and 85 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-17 18:42:07,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:42:07,181 INFO L93 Difference]: Finished difference Result 79 states and 94 transitions. [2022-03-17 18:42:07,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 18:42:07,183 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (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 30 [2022-03-17 18:42:07,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:42:07,185 INFO L225 Difference]: With dead ends: 79 [2022-03-17 18:42:07,185 INFO L226 Difference]: Without dead ends: 79 [2022-03-17 18:42:07,185 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-17 18:42:07,186 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 7 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 18:42:07,186 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 74 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 18:42:07,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-17 18:42:07,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2022-03-17 18:42:07,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 48 states have internal predecessors, (52), 23 states have call successors, (23), 11 states have call predecessors, (23), 10 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-17 18:42:07,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 94 transitions. [2022-03-17 18:42:07,195 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 94 transitions. Word has length 30 [2022-03-17 18:42:07,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:42:07,195 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 94 transitions. [2022-03-17 18:42:07,195 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-17 18:42:07,195 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 94 transitions. [2022-03-17 18:42:07,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-17 18:42:07,196 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:42:07,196 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:42:07,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-17 18:42:07,411 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 18:42:07,411 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:42:07,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:42:07,412 INFO L85 PathProgramCache]: Analyzing trace with hash 888200606, now seen corresponding path program 2 times [2022-03-17 18:42:07,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:42:07,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635954867] [2022-03-17 18:42:07,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:42:07,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:42:07,422 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 18:42:07,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1932717187] [2022-03-17 18:42:07,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 18:42:07,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 18:42:07,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 18:42:07,427 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 18:42:07,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-17 18:42:07,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 18:42:07,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 18:42:07,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-17 18:42:07,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 18:42:07,608 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-17 18:42:07,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 18:42:07,706 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-17 18:42:07,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:42:07,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635954867] [2022-03-17 18:42:07,707 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 18:42:07,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932717187] [2022-03-17 18:42:07,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932717187] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 18:42:07,707 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 18:42:07,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-03-17 18:42:07,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614900296] [2022-03-17 18:42:07,708 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 18:42:07,708 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-17 18:42:07,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:42:07,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-17 18:42:07,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-17 18:42:07,709 INFO L87 Difference]: Start difference. First operand 79 states and 94 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, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-03-17 18:42:07,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:42:07,915 INFO L93 Difference]: Finished difference Result 77 states and 90 transitions. [2022-03-17 18:42:07,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-17 18:42:07,915 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, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 35 [2022-03-17 18:42:07,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:42:07,916 INFO L225 Difference]: With dead ends: 77 [2022-03-17 18:42:07,916 INFO L226 Difference]: Without dead ends: 0 [2022-03-17 18:42:07,916 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-03-17 18:42:07,917 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 12 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 18:42:07,917 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 103 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 18:42:07,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-17 18:42:07,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-17 18:42:07,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-17 18:42:07,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-17 18:42:07,918 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 35 [2022-03-17 18:42:07,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:42:07,918 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-17 18:42:07,918 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, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-03-17 18:42:07,918 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-17 18:42:07,919 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-17 18:42:07,921 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-17 18:42:07,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-17 18:42:08,121 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 18:42:08,124 INFO L718 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1] [2022-03-17 18:42:08,125 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-17 18:42:08,127 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 06:42:08 BasicIcfg [2022-03-17 18:42:08,128 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-17 18:42:08,128 INFO L158 Benchmark]: Toolchain (without parser) took 4397.91ms. Allocated memory is still 217.1MB. Free memory was 170.9MB in the beginning and 78.8MB in the end (delta: 92.1MB). Peak memory consumption was 93.0MB. Max. memory is 8.0GB. [2022-03-17 18:42:08,128 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 217.1MB. Free memory is still 187.5MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-17 18:42:08,128 INFO L158 Benchmark]: CACSL2BoogieTranslator took 208.04ms. Allocated memory is still 217.1MB. Free memory was 170.7MB in the beginning and 196.0MB in the end (delta: -25.3MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-17 18:42:08,129 INFO L158 Benchmark]: Boogie Preprocessor took 29.53ms. Allocated memory is still 217.1MB. Free memory was 196.0MB in the beginning and 194.4MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-17 18:42:08,129 INFO L158 Benchmark]: RCFGBuilder took 269.09ms. Allocated memory is still 217.1MB. Free memory was 194.4MB in the beginning and 184.5MB in the end (delta: 9.9MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-17 18:42:08,129 INFO L158 Benchmark]: IcfgTransformer took 30.82ms. Allocated memory is still 217.1MB. Free memory was 184.5MB in the beginning and 183.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-17 18:42:08,129 INFO L158 Benchmark]: TraceAbstraction took 3851.19ms. Allocated memory is still 217.1MB. Free memory was 182.6MB in the beginning and 78.8MB in the end (delta: 103.8MB). Peak memory consumption was 105.1MB. Max. memory is 8.0GB. [2022-03-17 18:42:08,131 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 217.1MB. Free memory is still 187.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 208.04ms. Allocated memory is still 217.1MB. Free memory was 170.7MB in the beginning and 196.0MB in the end (delta: -25.3MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 29.53ms. Allocated memory is still 217.1MB. Free memory was 196.0MB in the beginning and 194.4MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 269.09ms. Allocated memory is still 217.1MB. Free memory was 194.4MB in the beginning and 184.5MB in the end (delta: 9.9MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * IcfgTransformer took 30.82ms. Allocated memory is still 217.1MB. Free memory was 184.5MB in the beginning and 183.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * TraceAbstraction took 3851.19ms. Allocated memory is still 217.1MB. Free memory was 182.6MB in the beginning and 78.8MB in the end (delta: 103.8MB). Peak memory consumption was 105.1MB. 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: 14]: 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 4 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 3.8s, OverallIterations: 8, TraceHistogramMax: 5, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 122 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 108 mSDsluCounter, 651 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 427 mSDsCounter, 93 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 343 IncrementalHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 93 mSolverCounterUnsat, 224 mSDtfsCounter, 343 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 255 GetRequests, 207 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=79occurred in iteration=7, InterpolantAutomatonStates: 49, 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, 8 MinimizatonAttempts, 8 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 169 NumberOfCodeBlocks, 169 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 253 ConstructedInterpolants, 0 QuantifiedInterpolants, 822 SizeOfPredicates, 7 NumberOfNonLiveVariables, 508 ConjunctsInSsa, 47 ConjunctsInUnsatCore, 11 InterpolantComputations, 6 PerfectInterpolantSequences, 149/164 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-03-17 18:42:08,147 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...