/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/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-15 04:06:08,056 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-15 04:06:08,058 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-15 04:06:08,074 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-15 04:06:08,074 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-15 04:06:08,075 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-15 04:06:08,076 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-15 04:06:08,076 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-15 04:06:08,077 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-15 04:06:08,078 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-15 04:06:08,078 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-15 04:06:08,079 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-15 04:06:08,079 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-15 04:06:08,080 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-15 04:06:08,080 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-15 04:06:08,081 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-15 04:06:08,082 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-15 04:06:08,082 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-15 04:06:08,083 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-15 04:06:08,084 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-15 04:06:08,085 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-15 04:06:08,086 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-15 04:06:08,086 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-15 04:06:08,087 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-15 04:06:08,089 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-02-15 04:06:08,089 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-02-15 04:06:08,089 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-02-15 04:06:08,090 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-02-15 04:06:08,090 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-02-15 04:06:08,090 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-02-15 04:06:08,091 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-02-15 04:06:08,091 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-02-15 04:06:08,092 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-02-15 04:06:08,092 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-02-15 04:06:08,093 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-02-15 04:06:08,093 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-02-15 04:06:08,093 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-02-15 04:06:08,093 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-02-15 04:06:08,093 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-15 04:06:08,095 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-15 04:06:08,095 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-15 04:06:08,096 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-02-15 04:06:08,106 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-15 04:06:08,107 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-15 04:06:08,108 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-15 04:06:08,108 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-15 04:06:08,108 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-15 04:06:08,108 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-15 04:06:08,108 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-15 04:06:08,108 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-15 04:06:08,108 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-15 04:06:08,108 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-15 04:06:08,109 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-15 04:06:08,109 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-15 04:06:08,109 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-15 04:06:08,109 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-15 04:06:08,109 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-15 04:06:08,109 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 04:06:08,110 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-15 04:06:08,110 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-15 04:06:08,110 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-15 04:06:08,110 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-02-15 04:06:08,110 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-15 04:06:08,287 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-15 04:06:08,300 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-15 04:06:08,302 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-15 04:06:08,303 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-15 04:06:08,303 INFO L275 PluginConnector]: CDTParser initialized [2022-02-15 04:06:08,304 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound1.c [2022-02-15 04:06:08,356 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f862e716e/8c3eb24a5d1b41d7b4f58aa6cd39c2fe/FLAG4757440a1 [2022-02-15 04:06:08,723 INFO L306 CDTParser]: Found 1 translation units. [2022-02-15 04:06:08,723 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound1.c [2022-02-15 04:06:08,729 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f862e716e/8c3eb24a5d1b41d7b4f58aa6cd39c2fe/FLAG4757440a1 [2022-02-15 04:06:08,740 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f862e716e/8c3eb24a5d1b41d7b4f58aa6cd39c2fe [2022-02-15 04:06:08,742 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-15 04:06:08,743 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-15 04:06:08,748 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-15 04:06:08,749 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-15 04:06:08,751 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-15 04:06:08,751 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 04:06:08" (1/1) ... [2022-02-15 04:06:08,752 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@493b51c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:06:08, skipping insertion in model container [2022-02-15 04:06:08,752 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 04:06:08" (1/1) ... [2022-02-15 04:06:08,756 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-15 04:06:08,770 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-15 04:06:08,929 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_valuebound1.c[525,538] [2022-02-15 04:06:08,953 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 04:06:08,958 INFO L203 MainTranslator]: Completed pre-run [2022-02-15 04:06:08,966 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_valuebound1.c[525,538] [2022-02-15 04:06:08,974 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 04:06:08,982 INFO L208 MainTranslator]: Completed translation [2022-02-15 04:06:08,982 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:06:08 WrapperNode [2022-02-15 04:06:08,982 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-15 04:06:08,983 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-15 04:06:08,983 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-15 04:06:08,983 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-15 04:06:08,990 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:06:08" (1/1) ... [2022-02-15 04:06:08,990 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:06:08" (1/1) ... [2022-02-15 04:06:08,994 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:06:08" (1/1) ... [2022-02-15 04:06:08,994 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:06:08" (1/1) ... [2022-02-15 04:06:08,998 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:06:08" (1/1) ... [2022-02-15 04:06:09,000 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:06:08" (1/1) ... [2022-02-15 04:06:09,001 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:06:08" (1/1) ... [2022-02-15 04:06:09,002 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-15 04:06:09,003 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-15 04:06:09,003 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-15 04:06:09,003 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-15 04:06:09,003 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:06:08" (1/1) ... [2022-02-15 04:06:09,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 04:06:09,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 04:06:09,031 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) [2022-02-15 04:06:09,035 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 [2022-02-15 04:06:09,060 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-15 04:06:09,060 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-15 04:06:09,060 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-15 04:06:09,060 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-15 04:06:09,061 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-15 04:06:09,061 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-15 04:06:09,061 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-15 04:06:09,061 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-15 04:06:09,061 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-15 04:06:09,061 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-15 04:06:09,061 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-02-15 04:06:09,062 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-15 04:06:09,062 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-15 04:06:09,063 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-15 04:06:09,063 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-15 04:06:09,063 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-15 04:06:09,063 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-15 04:06:09,064 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-15 04:06:09,065 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-15 04:06:09,065 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-15 04:06:09,113 INFO L234 CfgBuilder]: Building ICFG [2022-02-15 04:06:09,114 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-15 04:06:09,280 INFO L275 CfgBuilder]: Performing block encoding [2022-02-15 04:06:09,284 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-15 04:06:09,285 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-15 04:06:09,286 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 04:06:09 BoogieIcfgContainer [2022-02-15 04:06:09,286 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-15 04:06:09,291 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-15 04:06:09,292 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-15 04:06:09,294 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-15 04:06:09,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 04:06:08" (1/3) ... [2022-02-15 04:06:09,295 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33328f8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 04:06:09, skipping insertion in model container [2022-02-15 04:06:09,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:06:08" (2/3) ... [2022-02-15 04:06:09,295 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33328f8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 04:06:09, skipping insertion in model container [2022-02-15 04:06:09,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 04:06:09" (3/3) ... [2022-02-15 04:06:09,296 INFO L111 eAbstractionObserver]: Analyzing ICFG dijkstra-u_valuebound1.c [2022-02-15 04:06:09,299 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-15 04:06:09,299 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-15 04:06:09,328 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-15 04:06:09,333 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, 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, mLoopAccelerationTechnique=QVASR [2022-02-15 04:06:09,333 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-15 04:06:09,342 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) [2022-02-15 04:06:09,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 04:06:09,347 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:06:09,347 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] [2022-02-15 04:06:09,348 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:06:09,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:06:09,355 INFO L85 PathProgramCache]: Analyzing trace with hash 223850557, now seen corresponding path program 1 times [2022-02-15 04:06:09,360 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:06:09,361 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [187688062] [2022-02-15 04:06:09,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:06:09,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:06:09,409 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:06:09,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:06:09,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:06:09,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:06:09,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:06:09,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:06:09,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-15 04:06:09,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:06:09,561 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-15 04:06:09,562 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:06:09,562 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [187688062] [2022-02-15 04:06:09,563 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [187688062] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:06:09,563 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:06:09,563 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-15 04:06:09,564 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84573082] [2022-02-15 04:06:09,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:06:09,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-15 04:06:09,569 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:06:09,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-15 04:06:09,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-15 04:06:09,591 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) [2022-02-15 04:06:11,653 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-15 04:06:13,690 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-15 04:06:14,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:06:14,003 INFO L93 Difference]: Finished difference Result 69 states and 113 transitions. [2022-02-15 04:06:14,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-15 04:06:14,005 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 [2022-02-15 04:06:14,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:06:14,010 INFO L225 Difference]: With dead ends: 69 [2022-02-15 04:06:14,010 INFO L226 Difference]: Without dead ends: 33 [2022-02-15 04:06:14,012 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 [2022-02-15 04:06:14,015 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 14 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-02-15 04:06:14,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 43 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 9 Invalid, 2 Unknown, 0 Unchecked, 4.4s Time] [2022-02-15 04:06:14,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-02-15 04:06:14,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-02-15 04:06:14,053 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) [2022-02-15 04:06:14,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2022-02-15 04:06:14,057 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 23 [2022-02-15 04:06:14,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:06:14,057 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2022-02-15 04:06:14,057 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) [2022-02-15 04:06:14,057 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2022-02-15 04:06:14,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 04:06:14,058 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:06:14,058 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] [2022-02-15 04:06:14,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-15 04:06:14,059 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:06:14,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:06:14,059 INFO L85 PathProgramCache]: Analyzing trace with hash -563604624, now seen corresponding path program 1 times [2022-02-15 04:06:14,059 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:06:14,060 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1533533216] [2022-02-15 04:06:14,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:06:14,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:06:14,061 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:06:14,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:06:14,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:06:14,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:06:14,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:06:14,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:06:14,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-15 04:06:14,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:06:14,259 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-15 04:06:14,259 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:06:14,259 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1533533216] [2022-02-15 04:06:14,259 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1533533216] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:06:14,259 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:06:14,260 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-15 04:06:14,260 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043001682] [2022-02-15 04:06:14,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:06:14,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 04:06:14,260 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:06:14,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 04:06:14,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-02-15 04:06:14,261 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) [2022-02-15 04:06:19,011 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-15 04:06:21,442 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-15 04:06:23,444 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-15 04:06:25,449 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-15 04:06:25,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:06:25,617 INFO L93 Difference]: Finished difference Result 68 states and 98 transitions. [2022-02-15 04:06:25,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-15 04:06:25,618 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 [2022-02-15 04:06:25,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:06:25,619 INFO L225 Difference]: With dead ends: 68 [2022-02-15 04:06:25,619 INFO L226 Difference]: Without dead ends: 48 [2022-02-15 04:06:25,619 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 [2022-02-15 04:06:25,620 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 34 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 48 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.3s IncrementalHoareTripleChecker+Time [2022-02-15 04:06:25,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 58 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 209 Invalid, 4 Unknown, 0 Unchecked, 11.3s Time] [2022-02-15 04:06:25,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-02-15 04:06:25,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-02-15 04:06:25,639 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) [2022-02-15 04:06:25,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions. [2022-02-15 04:06:25,640 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 24 [2022-02-15 04:06:25,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:06:25,640 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions. [2022-02-15 04:06:25,640 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) [2022-02-15 04:06:25,640 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions. [2022-02-15 04:06:25,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 04:06:25,641 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:06:25,641 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] [2022-02-15 04:06:25,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-15 04:06:25,641 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:06:25,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:06:25,642 INFO L85 PathProgramCache]: Analyzing trace with hash -5094773, now seen corresponding path program 1 times [2022-02-15 04:06:25,642 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:06:25,642 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2101325536] [2022-02-15 04:06:25,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:06:25,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:06:25,643 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:06:25,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:06:25,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:06:25,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:06:25,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:06:25,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:06:25,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-15 04:06:25,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:06:25,849 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-15 04:06:25,850 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:06:25,851 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2101325536] [2022-02-15 04:06:25,851 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2101325536] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:06:25,851 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:06:25,851 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-15 04:06:25,851 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293345431] [2022-02-15 04:06:25,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:06:25,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 04:06:25,852 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:06:25,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 04:06:25,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-02-15 04:06:25,852 INFO L87 Difference]: Start difference. First operand 48 states and 65 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 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) [2022-02-15 04:06:32,750 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-15 04:06:34,827 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-15 04:06:36,829 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-15 04:06:38,877 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-15 04:06:40,946 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-15 04:06:41,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:06:41,560 INFO L93 Difference]: Finished difference Result 67 states and 93 transitions. [2022-02-15 04:06:41,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 04:06:41,561 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 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 [2022-02-15 04:06:41,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:06:41,562 INFO L225 Difference]: With dead ends: 67 [2022-02-15 04:06:41,562 INFO L226 Difference]: Without dead ends: 63 [2022-02-15 04:06:41,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-02-15 04:06:41,563 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 44 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 85 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.6s IncrementalHoareTripleChecker+Time [2022-02-15 04:06:41,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 56 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 236 Invalid, 5 Unknown, 0 Unchecked, 15.6s Time] [2022-02-15 04:06:41,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-02-15 04:06:41,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2022-02-15 04:06:41,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 32 states have internal predecessors, (37), 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) [2022-02-15 04:06:41,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 86 transitions. [2022-02-15 04:06:41,577 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 86 transitions. Word has length 26 [2022-02-15 04:06:41,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:06:41,578 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 86 transitions. [2022-02-15 04:06:41,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 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) [2022-02-15 04:06:41,578 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 86 transitions. [2022-02-15 04:06:41,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-15 04:06:41,578 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:06:41,578 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:06:41,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-15 04:06:41,579 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:06:41,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:06:41,579 INFO L85 PathProgramCache]: Analyzing trace with hash -148039962, now seen corresponding path program 2 times [2022-02-15 04:06:41,579 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:06:41,579 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [905735309] [2022-02-15 04:06:41,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:06:41,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:06:41,581 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:06:41,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:06:41,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:06:41,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:06:41,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:06:41,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:06:41,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-15 04:06:41,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:06:41,790 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-15 04:06:41,790 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:06:41,790 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [905735309] [2022-02-15 04:06:41,790 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [905735309] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:06:41,790 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:06:41,790 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-15 04:06:41,790 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177437420] [2022-02-15 04:06:41,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:06:41,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 04:06:41,791 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:06:41,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 04:06:41,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-02-15 04:06:41,791 INFO L87 Difference]: Start difference. First operand 62 states and 86 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 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) [2022-02-15 04:06:47,553 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-15 04:06:49,556 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-15 04:06:51,576 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-15 04:06:53,717 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-15 04:06:55,721 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-15 04:06:57,726 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-15 04:06:59,731 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-15 04:07:01,467 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-15 04:07:01,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:07:01,743 INFO L93 Difference]: Finished difference Result 86 states and 119 transitions. [2022-02-15 04:07:01,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 04:07:01,744 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 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 28 [2022-02-15 04:07:01,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:07:01,746 INFO L225 Difference]: With dead ends: 86 [2022-02-15 04:07:01,746 INFO L226 Difference]: Without dead ends: 77 [2022-02-15 04:07:01,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2022-02-15 04:07:01,747 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 43 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 114 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.8s IncrementalHoareTripleChecker+Time [2022-02-15 04:07:01,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 72 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 363 Invalid, 7 Unknown, 0 Unchecked, 19.8s Time] [2022-02-15 04:07:01,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-02-15 04:07:01,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2022-02-15 04:07:01,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 39 states have internal predecessors, (45), 32 states have call successors, (32), 7 states have call predecessors, (32), 6 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-02-15 04:07:01,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 106 transitions. [2022-02-15 04:07:01,761 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 106 transitions. Word has length 28 [2022-02-15 04:07:01,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:07:01,773 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 106 transitions. [2022-02-15 04:07:01,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 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) [2022-02-15 04:07:01,774 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 106 transitions. [2022-02-15 04:07:01,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 04:07:01,774 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:07:01,774 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:07:01,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-15 04:07:01,775 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:07:01,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:07:01,783 INFO L85 PathProgramCache]: Analyzing trace with hash -79413119, now seen corresponding path program 3 times [2022-02-15 04:07:01,783 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:07:01,783 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1842761465] [2022-02-15 04:07:01,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:07:01,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:07:01,784 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:07:01,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:07:01,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:07:01,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:07:01,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:07:01,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:07:01,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-15 04:07:01,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:07:01,995 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-15 04:07:01,995 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:07:01,996 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1842761465] [2022-02-15 04:07:01,996 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1842761465] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:07:01,996 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:07:01,996 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 04:07:01,997 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313276451] [2022-02-15 04:07:01,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:07:01,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 04:07:01,997 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:07:01,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 04:07:01,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-02-15 04:07:01,998 INFO L87 Difference]: Start difference. First operand 76 states and 106 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 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) [2022-02-15 04:07:06,788 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-15 04:07:11,739 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-15 04:07:14,129 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-15 04:07:16,202 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-15 04:07:18,367 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-15 04:07:20,479 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-15 04:07:23,883 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 [] [2022-02-15 04:07:24,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:07:24,030 INFO L93 Difference]: Finished difference Result 141 states and 216 transitions. [2022-02-15 04:07:24,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 04:07:24,030 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 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 30 [2022-02-15 04:07:24,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:07:24,033 INFO L225 Difference]: With dead ends: 141 [2022-02-15 04:07:24,033 INFO L226 Difference]: Without dead ends: 120 [2022-02-15 04:07:24,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2022-02-15 04:07:24,034 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 59 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 182 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.8s IncrementalHoareTripleChecker+Time [2022-02-15 04:07:24,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 86 Invalid, 872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 684 Invalid, 6 Unknown, 0 Unchecked, 21.8s Time] [2022-02-15 04:07:24,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-02-15 04:07:24,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 115. [2022-02-15 04:07:24,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 51 states have (on average 1.2549019607843137) internal successors, (64), 55 states have internal predecessors, (64), 56 states have call successors, (56), 8 states have call predecessors, (56), 7 states have return successors, (53), 51 states have call predecessors, (53), 53 states have call successors, (53) [2022-02-15 04:07:24,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 173 transitions. [2022-02-15 04:07:24,062 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 173 transitions. Word has length 30 [2022-02-15 04:07:24,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:07:24,063 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 173 transitions. [2022-02-15 04:07:24,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 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) [2022-02-15 04:07:24,063 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 173 transitions. [2022-02-15 04:07:24,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-15 04:07:24,069 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:07:24,069 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] [2022-02-15 04:07:24,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-15 04:07:24,070 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:07:24,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:07:24,070 INFO L85 PathProgramCache]: Analyzing trace with hash -2000886032, now seen corresponding path program 1 times [2022-02-15 04:07:24,070 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:07:24,070 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [565937209] [2022-02-15 04:07:24,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:07:24,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:07:24,073 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:07:24,094 WARN L132 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2022-02-15 04:07:24,094 INFO L628 BasicCegarLoop]: Counterexample might be feasible [2022-02-15 04:07:24,098 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-15 04:07:24,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-15 04:07:24,101 INFO L732 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1] [2022-02-15 04:07:24,103 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-15 04:07:24,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.02 04:07:24 BoogieIcfgContainer [2022-02-15 04:07:24,112 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-15 04:07:24,113 INFO L158 Benchmark]: Toolchain (without parser) took 75369.53ms. Allocated memory was 192.9MB in the beginning and 241.2MB in the end (delta: 48.2MB). Free memory was 136.2MB in the beginning and 112.3MB in the end (delta: 23.9MB). Peak memory consumption was 72.0MB. Max. memory is 8.0GB. [2022-02-15 04:07:24,113 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 192.9MB. Free memory is still 152.4MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-15 04:07:24,113 INFO L158 Benchmark]: CACSL2BoogieTranslator took 233.97ms. Allocated memory was 192.9MB in the beginning and 241.2MB in the end (delta: 48.2MB). Free memory was 136.0MB in the beginning and 209.6MB in the end (delta: -73.6MB). Peak memory consumption was 9.5MB. Max. memory is 8.0GB. [2022-02-15 04:07:24,113 INFO L158 Benchmark]: Boogie Preprocessor took 19.22ms. Allocated memory is still 241.2MB. Free memory was 209.6MB in the beginning and 208.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-15 04:07:24,113 INFO L158 Benchmark]: RCFGBuilder took 283.28ms. Allocated memory is still 241.2MB. Free memory was 208.0MB in the beginning and 195.8MB in the end (delta: 12.2MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-02-15 04:07:24,113 INFO L158 Benchmark]: TraceAbstraction took 74820.72ms. Allocated memory is still 241.2MB. Free memory was 195.4MB in the beginning and 112.3MB in the end (delta: 83.1MB). Peak memory consumption was 82.4MB. Max. memory is 8.0GB. [2022-02-15 04:07:24,114 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 192.9MB. Free memory is still 152.4MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 233.97ms. Allocated memory was 192.9MB in the beginning and 241.2MB in the end (delta: 48.2MB). Free memory was 136.0MB in the beginning and 209.6MB in the end (delta: -73.6MB). Peak memory consumption was 9.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 19.22ms. Allocated memory is still 241.2MB. Free memory was 209.6MB in the beginning and 208.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 283.28ms. Allocated memory is still 241.2MB. Free memory was 208.0MB in the beginning and 195.8MB in the end (delta: 12.2MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 74820.72ms. Allocated memory is still 241.2MB. Free memory was 195.4MB in the beginning and 112.3MB in the end (delta: 83.1MB). Peak memory consumption was 82.4MB. 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 - UnprovableResult [Line: 14]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L20] unsigned int n, p, q, r, h; [L22] n = __VERIFIER_nondet_uint() [L23] CALL assume_abort_if_not(n>=0 && n<=1) [L9] COND FALSE !(!cond) [L23] RET assume_abort_if_not(n>=0 && n<=1) [L24] CALL assume_abort_if_not(n < 4294967295 / 4) [L9] COND FALSE !(!cond) [L24] RET assume_abort_if_not(n < 4294967295 / 4) [L26] p = 0 [L27] q = 1 [L28] r = n [L29] h = 0 [L30] COND TRUE 1 [L31] COND TRUE !(q <= n) [L38] COND TRUE 1 [L39] CALL __VERIFIER_assert(r < 2 * p + q) [L12] COND FALSE !(!(cond)) [L39] RET __VERIFIER_assert(r < 2 * p + q) [L40] CALL __VERIFIER_assert(p*p + r*q == n*q) [L12] COND FALSE !(!(cond)) [L40] RET __VERIFIER_assert(p*p + r*q == n*q) [L41] CALL __VERIFIER_assert(h * h * h - 12 * h * n * q + 16 * n * p * q - h * q * q - 4 * p * q * q + 12 * h * q * r - 16 * p * q * r == 0) [L12] COND TRUE !(cond) [L14] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 41 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 74.8s, OverallIterations: 6, TraceHistogramMax: 4, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 73.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 24 mSolverCounterUnknown, 247 SdHoareTripleChecker+Valid, 72.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 200 mSDsluCounter, 315 SdHoareTripleChecker+Invalid, 71.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 120 mSDsCounter, 443 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1501 IncrementalHoareTripleChecker+Invalid, 1968 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 443 mSolverCounterUnsat, 195 mSDtfsCounter, 1501 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 97 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=115occurred in iteration=5, InterpolantAutomatonStates: 47, 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, 5 MinimizatonAttempts, 7 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, 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 RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-02-15 04:07:24,141 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...