/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/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-15 02:27:25,020 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-15 02:27:25,022 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-15 02:27:25,096 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-15 02:27:25,097 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-15 02:27:25,099 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-15 02:27:25,102 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-15 02:27:25,107 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-15 02:27:25,109 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-15 02:27:25,114 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-15 02:27:25,115 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-15 02:27:25,116 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-15 02:27:25,116 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-15 02:27:25,118 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-15 02:27:25,120 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-15 02:27:25,122 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-15 02:27:25,123 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-15 02:27:25,124 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-15 02:27:25,126 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-15 02:27:25,131 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-15 02:27:25,132 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-15 02:27:25,133 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-15 02:27:25,135 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-15 02:27:25,136 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-15 02:27:25,141 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-02-15 02:27:25,142 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-02-15 02:27:25,142 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-02-15 02:27:25,144 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-02-15 02:27:25,144 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-02-15 02:27:25,145 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-02-15 02:27:25,145 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-02-15 02:27:25,145 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-02-15 02:27:25,147 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-02-15 02:27:25,148 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-02-15 02:27:25,149 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-02-15 02:27:25,149 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-02-15 02:27:25,150 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-02-15 02:27:25,150 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-02-15 02:27:25,150 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-15 02:27:25,151 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-15 02:27:25,151 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-15 02:27:25,152 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-02-15 02:27:25,162 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-15 02:27:25,162 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-15 02:27:25,164 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-15 02:27:25,164 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-15 02:27:25,164 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-15 02:27:25,164 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-15 02:27:25,164 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-15 02:27:25,164 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-15 02:27:25,165 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-15 02:27:25,165 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-15 02:27:25,165 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-15 02:27:25,166 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-15 02:27:25,166 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-15 02:27:25,166 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-15 02:27:25,166 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-15 02:27:25,166 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-15 02:27:25,166 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-15 02:27:25,166 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-15 02:27:25,166 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 02:27:25,167 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-15 02:27:25,167 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-15 02:27:25,167 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-15 02:27:25,167 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-02-15 02:27:25,167 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-15 02:27:25,406 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-15 02:27:25,433 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-15 02:27:25,435 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-15 02:27:25,436 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-15 02:27:25,436 INFO L275 PluginConnector]: CDTParser initialized [2022-02-15 02:27:25,437 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound20.c [2022-02-15 02:27:25,501 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2a5a8d34/e518e55945574d2ea05b27c402af93db/FLAG0fd152f70 [2022-02-15 02:27:25,909 INFO L306 CDTParser]: Found 1 translation units. [2022-02-15 02:27:25,909 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound20.c [2022-02-15 02:27:25,920 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2a5a8d34/e518e55945574d2ea05b27c402af93db/FLAG0fd152f70 [2022-02-15 02:27:26,307 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2a5a8d34/e518e55945574d2ea05b27c402af93db [2022-02-15 02:27:26,309 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-15 02:27:26,310 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-15 02:27:26,312 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-15 02:27:26,312 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-15 02:27:26,315 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-15 02:27:26,316 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 02:27:26" (1/1) ... [2022-02-15 02:27:26,319 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@375fbf5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:27:26, skipping insertion in model container [2022-02-15 02:27:26,320 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 02:27:26" (1/1) ... [2022-02-15 02:27:26,326 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-15 02:27:26,345 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-15 02:27:26,533 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_valuebound20.c[525,538] [2022-02-15 02:27:26,578 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 02:27:26,588 INFO L203 MainTranslator]: Completed pre-run [2022-02-15 02:27:26,613 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_valuebound20.c[525,538] [2022-02-15 02:27:26,642 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 02:27:26,664 INFO L208 MainTranslator]: Completed translation [2022-02-15 02:27:26,665 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:27:26 WrapperNode [2022-02-15 02:27:26,665 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-15 02:27:26,666 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-15 02:27:26,666 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-15 02:27:26,667 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-15 02:27:26,677 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:27:26" (1/1) ... [2022-02-15 02:27:26,678 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:27:26" (1/1) ... [2022-02-15 02:27:26,695 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:27:26" (1/1) ... [2022-02-15 02:27:26,695 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:27:26" (1/1) ... [2022-02-15 02:27:26,705 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:27:26" (1/1) ... [2022-02-15 02:27:26,708 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:27:26" (1/1) ... [2022-02-15 02:27:26,709 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:27:26" (1/1) ... [2022-02-15 02:27:26,711 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-15 02:27:26,711 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-15 02:27:26,712 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-15 02:27:26,712 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-15 02:27:26,719 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:27:26" (1/1) ... [2022-02-15 02:27:26,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 02:27:26,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 02:27:26,749 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 02:27:26,771 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 02:27:26,795 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-15 02:27:26,795 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-15 02:27:26,795 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-15 02:27:26,795 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-15 02:27:26,796 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-15 02:27:26,796 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-15 02:27:26,797 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-15 02:27:26,797 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-15 02:27:26,797 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-15 02:27:26,797 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-15 02:27:26,797 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-02-15 02:27:26,797 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-15 02:27:26,798 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-15 02:27:26,798 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-15 02:27:26,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-15 02:27:26,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-15 02:27:26,800 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-15 02:27:26,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-15 02:27:26,800 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-15 02:27:26,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-15 02:27:26,859 INFO L234 CfgBuilder]: Building ICFG [2022-02-15 02:27:26,861 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-15 02:27:27,063 INFO L275 CfgBuilder]: Performing block encoding [2022-02-15 02:27:27,068 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-15 02:27:27,068 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-15 02:27:27,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 02:27:27 BoogieIcfgContainer [2022-02-15 02:27:27,070 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-15 02:27:27,071 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-15 02:27:27,071 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-15 02:27:27,074 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-15 02:27:27,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 02:27:26" (1/3) ... [2022-02-15 02:27:27,075 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39afe276 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 02:27:27, skipping insertion in model container [2022-02-15 02:27:27,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:27:26" (2/3) ... [2022-02-15 02:27:27,076 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39afe276 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 02:27:27, skipping insertion in model container [2022-02-15 02:27:27,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 02:27:27" (3/3) ... [2022-02-15 02:27:27,077 INFO L111 eAbstractionObserver]: Analyzing ICFG dijkstra-u_valuebound20.c [2022-02-15 02:27:27,081 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-15 02:27:27,081 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-15 02:27:27,135 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-15 02:27:27,141 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=JORDAN [2022-02-15 02:27:27,141 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-15 02:27:27,156 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 02:27:27,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 02:27:27,163 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:27:27,163 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 02:27:27,164 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:27:27,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:27:27,175 INFO L85 PathProgramCache]: Analyzing trace with hash 223850557, now seen corresponding path program 1 times [2022-02-15 02:27:27,183 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:27:27,184 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1020331348] [2022-02-15 02:27:27,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:27:27,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:27:27,251 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:27:27,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:27:27,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:27:27,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:27:27,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:27:27,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:27:27,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-15 02:27:27,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:27:27,419 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 02:27:27,421 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:27:27,421 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1020331348] [2022-02-15 02:27:27,423 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1020331348] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:27:27,423 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:27:27,423 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-15 02:27:27,425 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581693371] [2022-02-15 02:27:27,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:27:27,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-15 02:27:27,429 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:27:27,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-15 02:27:27,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-15 02:27:27,461 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 02:27:29,549 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 [] [2022-02-15 02:27:31,665 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 02:27:31,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:27:31,897 INFO L93 Difference]: Finished difference Result 69 states and 113 transitions. [2022-02-15 02:27:31,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-15 02:27:31,900 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 02:27:31,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:27:31,906 INFO L225 Difference]: With dead ends: 69 [2022-02-15 02:27:31,906 INFO L226 Difference]: Without dead ends: 33 [2022-02-15 02:27:31,908 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 02:27:31,911 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 02:27:31,912 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 02:27:31,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-02-15 02:27:31,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-02-15 02:27:31,947 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 02:27:31,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2022-02-15 02:27:31,950 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 23 [2022-02-15 02:27:31,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:27:31,950 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2022-02-15 02:27:31,950 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 02:27:31,951 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2022-02-15 02:27:31,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 02:27:31,952 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:27:31,952 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 02:27:31,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-15 02:27:31,953 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:27:31,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:27:31,954 INFO L85 PathProgramCache]: Analyzing trace with hash -563604624, now seen corresponding path program 1 times [2022-02-15 02:27:31,954 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:27:31,954 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [153293283] [2022-02-15 02:27:31,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:27:31,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:27:31,957 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:27:32,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:27:32,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:27:32,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:27:32,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:27:32,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:27:32,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-15 02:27:32,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:27:32,285 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 02:27:32,286 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:27:32,286 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [153293283] [2022-02-15 02:27:32,287 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [153293283] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:27:32,290 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:27:32,290 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-15 02:27:32,290 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228592831] [2022-02-15 02:27:32,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:27:32,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 02:27:32,293 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:27:32,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 02:27:32,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-02-15 02:27:32,295 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 02:27:34,516 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 02:27:36,962 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-15 02:27:38,965 WARN L534 Checker$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 02:27:40,969 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-15 02:27:42,979 WARN L534 Checker$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 02:27:45,079 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-15 02:27:47,082 WARN L534 Checker$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 02:27:49,513 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-15 02:27:51,515 WARN L534 Checker$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 02:27:53,517 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-15 02:27:55,519 WARN L534 Checker$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 02:27:55,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:27:55,863 INFO L93 Difference]: Finished difference Result 68 states and 98 transitions. [2022-02-15 02:27:55,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-15 02:27:55,864 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 02:27:55,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:27:55,865 INFO L225 Difference]: With dead ends: 68 [2022-02-15 02:27:55,866 INFO L226 Difference]: Without dead ends: 48 [2022-02-15 02:27:55,866 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 02:27:55,867 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 34 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 49 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:27:55,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 62 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 188 Invalid, 11 Unknown, 0 Unchecked, 23.5s Time] [2022-02-15 02:27:55,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-02-15 02:27:55,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-02-15 02:27:55,882 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 02:27:55,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions. [2022-02-15 02:27:55,884 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 24 [2022-02-15 02:27:55,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:27:55,885 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions. [2022-02-15 02:27:55,885 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 02:27:55,885 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions. [2022-02-15 02:27:55,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 02:27:55,886 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:27:55,886 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 02:27:55,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-15 02:27:55,886 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:27:55,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:27:55,887 INFO L85 PathProgramCache]: Analyzing trace with hash -5094773, now seen corresponding path program 1 times [2022-02-15 02:27:55,887 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:27:55,887 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [698283912] [2022-02-15 02:27:55,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:27:55,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:27:55,889 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:27:55,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:27:55,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:27:55,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:27:55,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:27:55,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:27:55,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-15 02:27:56,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:27:56,003 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 02:27:56,003 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:27:56,003 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [698283912] [2022-02-15 02:27:56,003 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [698283912] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:27:56,004 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:27:56,004 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-15 02:27:56,004 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029257170] [2022-02-15 02:27:56,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:27:56,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 02:27:56,004 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:27:56,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 02:27:56,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-02-15 02:27:56,005 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) [2022-02-15 02:27:58,201 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-15 02:28:01,190 WARN L534 Checker$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 02:28:03,195 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-15 02:28:05,136 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-15 02:28:07,526 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-15 02:28:08,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:28:08,345 INFO L93 Difference]: Finished difference Result 77 states and 112 transitions. [2022-02-15 02:28:08,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-15 02:28:08,346 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 [2022-02-15 02:28:08,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:28:08,348 INFO L225 Difference]: With dead ends: 77 [2022-02-15 02:28:08,348 INFO L226 Difference]: Without dead ends: 71 [2022-02-15 02:28:08,349 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 [2022-02-15 02:28:08,350 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 37 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 83 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.3s IncrementalHoareTripleChecker+Time [2022-02-15 02:28:08,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 49 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 220 Invalid, 3 Unknown, 0 Unchecked, 12.3s Time] [2022-02-15 02:28:08,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-02-15 02:28:08,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 63. [2022-02-15 02:28:08,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 33 states have internal predecessors, (37), 27 states have call successors, (27), 6 states have call predecessors, (27), 5 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-02-15 02:28:08,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 88 transitions. [2022-02-15 02:28:08,371 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 88 transitions. Word has length 26 [2022-02-15 02:28:08,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:28:08,372 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 88 transitions. [2022-02-15 02:28:08,372 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) [2022-02-15 02:28:08,372 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 88 transitions. [2022-02-15 02:28:08,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-15 02:28:08,373 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:28:08,373 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 02:28:08,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-15 02:28:08,373 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:28:08,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:28:08,374 INFO L85 PathProgramCache]: Analyzing trace with hash -2000886032, now seen corresponding path program 1 times [2022-02-15 02:28:08,374 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:28:08,374 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1992965401] [2022-02-15 02:28:08,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:28:08,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:28:08,376 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:28:08,388 WARN L132 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2022-02-15 02:28:08,389 INFO L628 BasicCegarLoop]: Counterexample might be feasible [2022-02-15 02:28:08,393 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-15 02:28:08,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-15 02:28:08,398 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-02-15 02:28:08,400 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-15 02:28:08,409 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.02 02:28:08 BoogieIcfgContainer [2022-02-15 02:28:08,410 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-15 02:28:08,410 INFO L158 Benchmark]: Toolchain (without parser) took 42099.64ms. Allocated memory was 182.5MB in the beginning and 248.5MB in the end (delta: 66.1MB). Free memory was 127.6MB in the beginning and 99.2MB in the end (delta: 28.4MB). Peak memory consumption was 94.4MB. Max. memory is 8.0GB. [2022-02-15 02:28:08,411 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 182.5MB. Free memory is still 143.8MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-15 02:28:08,411 INFO L158 Benchmark]: CACSL2BoogieTranslator took 353.36ms. Allocated memory was 182.5MB in the beginning and 248.5MB in the end (delta: 66.1MB). Free memory was 127.4MB in the beginning and 221.3MB in the end (delta: -93.9MB). Peak memory consumption was 12.8MB. Max. memory is 8.0GB. [2022-02-15 02:28:08,411 INFO L158 Benchmark]: Boogie Preprocessor took 44.67ms. Allocated memory is still 248.5MB. Free memory was 221.3MB in the beginning and 219.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-15 02:28:08,412 INFO L158 Benchmark]: RCFGBuilder took 358.57ms. Allocated memory is still 248.5MB. Free memory was 219.7MB in the beginning and 206.1MB in the end (delta: 13.6MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2022-02-15 02:28:08,412 INFO L158 Benchmark]: TraceAbstraction took 41338.30ms. Allocated memory is still 248.5MB. Free memory was 205.6MB in the beginning and 99.2MB in the end (delta: 106.4MB). Peak memory consumption was 107.0MB. Max. memory is 8.0GB. [2022-02-15 02:28:08,416 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 182.5MB. Free memory is still 143.8MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 353.36ms. Allocated memory was 182.5MB in the beginning and 248.5MB in the end (delta: 66.1MB). Free memory was 127.4MB in the beginning and 221.3MB in the end (delta: -93.9MB). Peak memory consumption was 12.8MB. Max. memory is 8.0GB. * Boogie Preprocessor took 44.67ms. Allocated memory is still 248.5MB. Free memory was 221.3MB in the beginning and 219.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 358.57ms. Allocated memory is still 248.5MB. Free memory was 219.7MB in the beginning and 206.1MB in the end (delta: 13.6MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * TraceAbstraction took 41338.30ms. Allocated memory is still 248.5MB. Free memory was 205.6MB in the beginning and 99.2MB in the end (delta: 106.4MB). Peak memory consumption was 107.0MB. 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<=20) [L9] COND FALSE !(!cond) [L23] RET assume_abort_if_not(n>=0 && n<=20) [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: 41.3s, OverallIterations: 4, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 40.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 16 mSolverCounterUnknown, 114 SdHoareTripleChecker+Valid, 40.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 91 mSDsluCounter, 154 SdHoareTripleChecker+Invalid, 40.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 50 mSDsCounter, 146 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 417 IncrementalHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 146 mSolverCounterUnsat, 104 mSDtfsCounter, 417 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=63occurred in iteration=3, InterpolantAutomatonStates: 19, 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, 3 MinimizatonAttempts, 8 StatesRemovedByMinimization, 1 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 02:28:08,431 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...