/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/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-23 22:04:48,008 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-23 22:04:48,010 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-23 22:04:48,037 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-23 22:04:48,038 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-23 22:04:48,038 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-23 22:04:48,041 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-23 22:04:48,048 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-23 22:04:48,049 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-23 22:04:48,052 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-23 22:04:48,053 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-23 22:04:48,054 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-23 22:04:48,054 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-23 22:04:48,055 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-23 22:04:48,056 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-23 22:04:48,057 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-23 22:04:48,058 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-23 22:04:48,058 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-23 22:04:48,061 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-23 22:04:48,065 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-23 22:04:48,066 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-23 22:04:48,067 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-23 22:04:48,068 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-23 22:04:48,068 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-23 22:04:48,072 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-23 22:04:48,077 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-23 22:04:48,078 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-23 22:04:48,078 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-23 22:04:48,079 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-02-23 22:04:48,101 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-23 22:04:48,101 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-23 22:04:48,102 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-23 22:04:48,102 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-23 22:04:48,103 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-23 22:04:48,103 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-23 22:04:48,103 INFO L138 SettingsManager]: * Use SBE=true [2022-02-23 22:04:48,103 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-23 22:04:48,103 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-23 22:04:48,103 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-23 22:04:48,104 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-23 22:04:48,104 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-23 22:04:48,104 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-23 22:04:48,104 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-23 22:04:48,104 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-23 22:04:48,104 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-23 22:04:48,105 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-23 22:04:48,105 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-23 22:04:48,105 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-23 22:04:48,105 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 22:04:48,105 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-23 22:04:48,105 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-23 22:04:48,105 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-23 22:04:48,105 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-23 22:04:48,105 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-23 22:04:48,105 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-23 22:04:48,105 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-02-23 22:04:48,105 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-02-23 22:04:48,106 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-23 22:04:48,106 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-23 22:04:48,254 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-23 22:04:48,277 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-23 22:04:48,279 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-23 22:04:48,280 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-23 22:04:48,280 INFO L275 PluginConnector]: CDTParser initialized [2022-02-23 22:04:48,281 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound50.c [2022-02-23 22:04:48,333 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e06f41aa6/eeee55a20ccd47518a420c4448d67e3f/FLAGff9b75562 [2022-02-23 22:04:48,651 INFO L306 CDTParser]: Found 1 translation units. [2022-02-23 22:04:48,652 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound50.c [2022-02-23 22:04:48,659 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e06f41aa6/eeee55a20ccd47518a420c4448d67e3f/FLAGff9b75562 [2022-02-23 22:04:48,691 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e06f41aa6/eeee55a20ccd47518a420c4448d67e3f [2022-02-23 22:04:48,692 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-23 22:04:48,693 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-23 22:04:48,694 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-23 22:04:48,694 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-23 22:04:48,696 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-23 22:04:48,696 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 10:04:48" (1/1) ... [2022-02-23 22:04:48,697 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75795cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:04:48, skipping insertion in model container [2022-02-23 22:04:48,697 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 10:04:48" (1/1) ... [2022-02-23 22:04:48,701 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-23 22:04:48,710 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-23 22:04:48,827 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/dijkstra-u_valuebound50.c[525,538] [2022-02-23 22:04:48,851 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 22:04:48,858 INFO L203 MainTranslator]: Completed pre-run [2022-02-23 22:04:48,865 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/dijkstra-u_valuebound50.c[525,538] [2022-02-23 22:04:48,879 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 22:04:48,889 INFO L208 MainTranslator]: Completed translation [2022-02-23 22:04:48,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:04:48 WrapperNode [2022-02-23 22:04:48,897 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-23 22:04:48,898 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-23 22:04:48,898 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-23 22:04:48,898 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-23 22:04:48,906 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:04:48" (1/1) ... [2022-02-23 22:04:48,906 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:04:48" (1/1) ... [2022-02-23 22:04:48,911 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:04:48" (1/1) ... [2022-02-23 22:04:48,911 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:04:48" (1/1) ... [2022-02-23 22:04:48,922 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:04:48" (1/1) ... [2022-02-23 22:04:48,925 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:04:48" (1/1) ... [2022-02-23 22:04:48,926 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:04:48" (1/1) ... [2022-02-23 22:04:48,927 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-23 22:04:48,928 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-23 22:04:48,928 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-23 22:04:48,928 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-23 22:04:48,929 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:04:48" (1/1) ... [2022-02-23 22:04:48,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 22:04:48,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:04:48,977 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) [2022-02-23 22:04:48,998 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 [2022-02-23 22:04:49,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-23 22:04:49,005 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-23 22:04:49,005 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-23 22:04:49,005 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-23 22:04:49,005 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-23 22:04:49,005 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-23 22:04:49,005 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-23 22:04:49,005 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-23 22:04:49,005 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-23 22:04:49,005 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-23 22:04:49,005 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-02-23 22:04:49,005 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-23 22:04:49,005 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-23 22:04:49,005 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-23 22:04:49,006 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-23 22:04:49,006 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-23 22:04:49,006 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-23 22:04:49,006 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-23 22:04:49,006 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-23 22:04:49,006 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-23 22:04:49,045 INFO L234 CfgBuilder]: Building ICFG [2022-02-23 22:04:49,046 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-23 22:04:49,185 INFO L275 CfgBuilder]: Performing block encoding [2022-02-23 22:04:49,191 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-23 22:04:49,191 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-23 22:04:49,192 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 10:04:49 BoogieIcfgContainer [2022-02-23 22:04:49,192 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-23 22:04:49,199 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-23 22:04:49,200 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-23 22:04:49,201 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-23 22:04:49,203 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 10:04:49" (1/1) ... [2022-02-23 22:04:49,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 10:04:49 BasicIcfg [2022-02-23 22:04:49,221 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-23 22:04:49,222 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-23 22:04:49,223 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-23 22:04:49,224 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-23 22:04:49,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 10:04:48" (1/4) ... [2022-02-23 22:04:49,225 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ad7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 10:04:49, skipping insertion in model container [2022-02-23 22:04:49,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:04:48" (2/4) ... [2022-02-23 22:04:49,225 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ad7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 10:04:49, skipping insertion in model container [2022-02-23 22:04:49,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 10:04:49" (3/4) ... [2022-02-23 22:04:49,226 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ad7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 10:04:49, skipping insertion in model container [2022-02-23 22:04:49,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 10:04:49" (4/4) ... [2022-02-23 22:04:49,226 INFO L111 eAbstractionObserver]: Analyzing ICFG dijkstra-u_valuebound50.cqvasr [2022-02-23 22:04:49,230 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-23 22:04:49,230 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-23 22:04:49,260 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-23 22:04:49,265 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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, mLoopAccelerationTechnique=FAST_UPR [2022-02-23 22:04:49,265 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-23 22:04:49,276 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-02-23 22:04:49,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-23 22:04:49,292 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:04:49,293 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:04:49,293 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:04:49,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:04:49,297 INFO L85 PathProgramCache]: Analyzing trace with hash 890522097, now seen corresponding path program 1 times [2022-02-23 22:04:49,303 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:04:49,303 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802111851] [2022-02-23 22:04:49,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:04:49,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:04:49,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:04:49,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 22:04:49,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:04:49,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-23 22:04:49,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:04:49,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-23 22:04:49,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:04:49,439 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 22:04:49,440 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:04:49,440 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802111851] [2022-02-23 22:04:49,440 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802111851] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 22:04:49,441 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 22:04:49,441 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-23 22:04:49,442 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341285914] [2022-02-23 22:04:49,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 22:04:49,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-23 22:04:49,445 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:04:49,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-23 22:04:49,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 22:04:49,464 INFO L87 Difference]: Start difference. First operand has 38 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 22:04:51,517 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-23 22:04:53,877 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-23 22:04:53,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:04:53,883 INFO L93 Difference]: Finished difference Result 69 states and 113 transitions. [2022-02-23 22:04:53,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-23 22:04:53,885 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-02-23 22:04:53,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:04:53,890 INFO L225 Difference]: With dead ends: 69 [2022-02-23 22:04:53,890 INFO L226 Difference]: Without dead ends: 33 [2022-02-23 22:04:53,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 22:04:53,894 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 19 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 14 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-02-23 22:04:53,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 42 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 10 Invalid, 2 Unknown, 0 Unchecked, 4.4s Time] [2022-02-23 22:04:53,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-02-23 22:04:53,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-02-23 22:04:53,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-02-23 22:04:53,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2022-02-23 22:04:53,940 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 23 [2022-02-23 22:04:53,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:04:53,940 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2022-02-23 22:04:53,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 22:04:53,940 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2022-02-23 22:04:53,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-23 22:04:53,941 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:04:53,942 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:04:53,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-23 22:04:53,942 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:04:53,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:04:53,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1386957495, now seen corresponding path program 1 times [2022-02-23 22:04:53,943 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:04:53,943 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464068601] [2022-02-23 22:04:53,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:04:53,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:04:53,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:04:54,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 22:04:54,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:04:54,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-23 22:04:54,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:04:54,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-23 22:04:54,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:04:54,128 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 22:04:54,128 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:04:54,128 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464068601] [2022-02-23 22:04:54,128 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464068601] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 22:04:54,128 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 22:04:54,128 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-23 22:04:54,129 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947897951] [2022-02-23 22:04:54,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 22:04:54,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-23 22:04:54,130 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:04:54,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-23 22:04:54,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-02-23 22:04:54,130 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-23 22:04:56,445 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-23 22:04:59,597 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-23 22:04:59,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:04:59,813 INFO L93 Difference]: Finished difference Result 68 states and 98 transitions. [2022-02-23 22:04:59,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-23 22:04:59,814 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2022-02-23 22:04:59,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:04:59,818 INFO L225 Difference]: With dead ends: 68 [2022-02-23 22:04:59,818 INFO L226 Difference]: Without dead ends: 48 [2022-02-23 22:04:59,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-02-23 22:04:59,819 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 35 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 54 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-02-23 22:04:59,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 55 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 187 Invalid, 2 Unknown, 0 Unchecked, 5.6s Time] [2022-02-23 22:04:59,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-02-23 22:04:59,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-02-23 22:04:59,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 25 states have internal predecessors, (28), 20 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-23 22:04:59,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions. [2022-02-23 22:04:59,832 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 24 [2022-02-23 22:04:59,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:04:59,832 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions. [2022-02-23 22:04:59,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-23 22:04:59,833 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions. [2022-02-23 22:04:59,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-23 22:04:59,833 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:04:59,833 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:04:59,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-23 22:04:59,834 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:04:59,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:04:59,834 INFO L85 PathProgramCache]: Analyzing trace with hash -472493455, now seen corresponding path program 1 times [2022-02-23 22:04:59,835 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:04:59,835 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432561030] [2022-02-23 22:04:59,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:04:59,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:04:59,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:04:59,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 22:04:59,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:04:59,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-23 22:04:59,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:05:00,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-23 22:05:00,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:05:00,010 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-23 22:05:00,010 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:05:00,010 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432561030] [2022-02-23 22:05:00,010 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432561030] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 22:05:00,011 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 22:05:00,012 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-23 22:05:00,012 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538576440] [2022-02-23 22:05:00,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 22:05:00,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-23 22:05:00,013 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:05:00,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-23 22:05:00,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-02-23 22:05:00,014 INFO L87 Difference]: Start difference. First operand 48 states and 65 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-23 22:05:02,658 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-23 22:05:06,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:05:06,165 INFO L93 Difference]: Finished difference Result 65 states and 90 transitions. [2022-02-23 22:05:06,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-23 22:05:06,165 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2022-02-23 22:05:06,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:05:06,166 INFO L225 Difference]: With dead ends: 65 [2022-02-23 22:05:06,167 INFO L226 Difference]: Without dead ends: 61 [2022-02-23 22:05:06,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-02-23 22:05:06,168 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 30 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 54 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-02-23 22:05:06,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 54 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 181 Invalid, 1 Unknown, 0 Unchecked, 6.1s Time] [2022-02-23 22:05:06,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-02-23 22:05:06,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2022-02-23 22:05:06,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 30 states have internal predecessors, (34), 26 states have call successors, (26), 6 states have call predecessors, (26), 5 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-02-23 22:05:06,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 83 transitions. [2022-02-23 22:05:06,181 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 83 transitions. Word has length 26 [2022-02-23 22:05:06,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:05:06,188 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 83 transitions. [2022-02-23 22:05:06,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-23 22:05:06,189 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 83 transitions. [2022-02-23 22:05:06,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-23 22:05:06,190 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:05:06,190 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:05:06,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-23 22:05:06,190 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:05:06,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:05:06,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1385093780, now seen corresponding path program 1 times [2022-02-23 22:05:06,191 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:05:06,191 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643196066] [2022-02-23 22:05:06,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:05:06,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:05:06,201 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:05:06,202 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1151402891] [2022-02-23 22:05:06,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:05:06,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:05:06,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:05:06,204 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) [2022-02-23 22:05:06,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-23 22:05:06,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:05:06,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-23 22:05:06,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:05:06,424 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-02-23 22:05:06,424 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 22:05:06,425 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:05:06,425 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643196066] [2022-02-23 22:05:06,425 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:05:06,425 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151402891] [2022-02-23 22:05:06,425 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151402891] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 22:05:06,425 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 22:05:06,425 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 22:05:06,425 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520251353] [2022-02-23 22:05:06,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 22:05:06,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 22:05:06,426 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:05:06,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 22:05:06,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 22:05:06,426 INFO L87 Difference]: Start difference. First operand 60 states and 83 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-23 22:05:06,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:05:06,987 INFO L93 Difference]: Finished difference Result 71 states and 92 transitions. [2022-02-23 22:05:06,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 22:05:06,987 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2022-02-23 22:05:06,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:05:06,988 INFO L225 Difference]: With dead ends: 71 [2022-02-23 22:05:06,988 INFO L226 Difference]: Without dead ends: 48 [2022-02-23 22:05:06,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-23 22:05:06,991 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 6 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-23 22:05:06,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 160 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-23 22:05:06,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-02-23 22:05:06,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-02-23 22:05:06,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 25 states have internal predecessors, (28), 20 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-23 22:05:06,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions. [2022-02-23 22:05:06,999 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 34 [2022-02-23 22:05:07,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:05:07,000 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions. [2022-02-23 22:05:07,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-23 22:05:07,000 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions. [2022-02-23 22:05:07,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-23 22:05:07,000 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:05:07,001 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:05:07,005 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-02-23 22:05:07,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:05:07,205 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:05:07,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:05:07,205 INFO L85 PathProgramCache]: Analyzing trace with hash 419889614, now seen corresponding path program 1 times [2022-02-23 22:05:07,206 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:05:07,206 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539422914] [2022-02-23 22:05:07,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:05:07,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:05:07,214 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:05:07,214 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1592338764] [2022-02-23 22:05:07,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:05:07,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:05:07,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:05:07,216 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) [2022-02-23 22:05:07,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-23 22:05:07,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:05:07,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 22:05:07,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:05:07,383 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-02-23 22:05:07,383 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 22:05:07,383 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:05:07,383 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539422914] [2022-02-23 22:05:07,384 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:05:07,384 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592338764] [2022-02-23 22:05:07,384 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592338764] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 22:05:07,384 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 22:05:07,384 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 22:05:07,384 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546655126] [2022-02-23 22:05:07,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 22:05:07,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 22:05:07,384 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:05:07,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 22:05:07,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 22:05:07,385 INFO L87 Difference]: Start difference. First operand 48 states and 65 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-23 22:05:07,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:05:07,930 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2022-02-23 22:05:07,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 22:05:07,932 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2022-02-23 22:05:07,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:05:07,933 INFO L225 Difference]: With dead ends: 58 [2022-02-23 22:05:07,933 INFO L226 Difference]: Without dead ends: 55 [2022-02-23 22:05:07,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-23 22:05:07,934 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 6 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-23 22:05:07,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 166 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-23 22:05:07,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-02-23 22:05:07,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-02-23 22:05:07,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 19 states have call successors, (19), 7 states have call predecessors, (19), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-23 22:05:07,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 69 transitions. [2022-02-23 22:05:07,944 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 69 transitions. Word has length 36 [2022-02-23 22:05:07,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:05:07,944 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 69 transitions. [2022-02-23 22:05:07,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-23 22:05:07,944 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 69 transitions. [2022-02-23 22:05:07,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-02-23 22:05:07,945 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:05:07,945 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:05:07,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-23 22:05:08,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:05:08,146 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:05:08,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:05:08,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1513839050, now seen corresponding path program 1 times [2022-02-23 22:05:08,147 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:05:08,148 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232897988] [2022-02-23 22:05:08,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:05:08,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:05:08,156 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:05:08,157 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [386975430] [2022-02-23 22:05:08,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:05:08,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:05:08,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:05:08,179 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) [2022-02-23 22:05:08,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process