/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/loop-invgen/apache-escape-absolute.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7390193 [2022-04-05 00:26:56,941 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-05 00:26:56,943 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-05 00:26:56,985 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-05 00:26:56,986 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-05 00:26:56,987 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-05 00:26:56,990 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-05 00:26:56,995 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-05 00:26:56,997 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-05 00:26:57,002 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-05 00:26:57,003 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-05 00:26:57,004 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-05 00:26:57,005 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-05 00:26:57,007 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-05 00:26:57,008 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-05 00:26:57,008 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-05 00:26:57,009 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-05 00:26:57,010 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-05 00:26:57,011 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-05 00:26:57,012 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-05 00:26:57,013 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-05 00:26:57,013 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-05 00:26:57,014 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-05 00:26:57,015 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-05 00:26:57,015 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-05 00:26:57,017 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-05 00:26:57,023 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-05 00:26:57,024 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-05 00:26:57,032 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-05 00:26:57,033 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-04-05 00:26:57,048 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-05 00:26:57,049 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-05 00:26:57,050 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-05 00:26:57,050 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-05 00:26:57,050 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-05 00:26:57,050 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-05 00:26:57,050 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-05 00:26:57,051 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-05 00:26:57,051 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-05 00:26:57,052 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-05 00:26:57,052 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-05 00:26:57,052 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-05 00:26:57,052 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-05 00:26:57,052 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-05 00:26:57,052 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-05 00:26:57,053 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-05 00:26:57,053 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-05 00:26:57,053 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-05 00:26:57,053 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 00:26:57,053 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-05 00:26:57,053 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-05 00:26:57,054 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-05 00:26:57,054 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-05 00:26:57,327 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-05 00:26:57,352 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-05 00:26:57,354 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-05 00:26:57,356 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-05 00:26:57,356 INFO L275 PluginConnector]: CDTParser initialized [2022-04-05 00:26:57,358 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/apache-escape-absolute.i [2022-04-05 00:26:57,413 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c1dd7c19/af8ba99f8e0e4c239a9fb587c62b8836/FLAG533aea8e3 [2022-04-05 00:26:57,845 INFO L306 CDTParser]: Found 1 translation units. [2022-04-05 00:26:57,846 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/apache-escape-absolute.i [2022-04-05 00:26:57,854 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c1dd7c19/af8ba99f8e0e4c239a9fb587c62b8836/FLAG533aea8e3 [2022-04-05 00:26:58,265 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c1dd7c19/af8ba99f8e0e4c239a9fb587c62b8836 [2022-04-05 00:26:58,267 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-05 00:26:58,268 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-05 00:26:58,271 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-05 00:26:58,272 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-05 00:26:58,275 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-05 00:26:58,275 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 12:26:58" (1/1) ... [2022-04-05 00:26:58,292 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@782d3461 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 12:26:58, skipping insertion in model container [2022-04-05 00:26:58,292 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 12:26:58" (1/1) ... [2022-04-05 00:26:58,298 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-05 00:26:58,311 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-05 00:26:58,455 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/apache-escape-absolute.i[893,906] [2022-04-05 00:26:58,476 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 00:26:58,482 INFO L203 MainTranslator]: Completed pre-run [2022-04-05 00:26:58,494 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/apache-escape-absolute.i[893,906] [2022-04-05 00:26:58,504 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 00:26:58,514 INFO L208 MainTranslator]: Completed translation [2022-04-05 00:26:58,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 12:26:58 WrapperNode [2022-04-05 00:26:58,515 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-05 00:26:58,516 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-05 00:26:58,516 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-05 00:26:58,516 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-05 00:26:58,527 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 12:26:58" (1/1) ... [2022-04-05 00:26:58,528 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 12:26:58" (1/1) ... [2022-04-05 00:26:58,533 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 12:26:58" (1/1) ... [2022-04-05 00:26:58,533 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 12:26:58" (1/1) ... [2022-04-05 00:26:58,538 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 12:26:58" (1/1) ... [2022-04-05 00:26:58,543 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 12:26:58" (1/1) ... [2022-04-05 00:26:58,544 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 12:26:58" (1/1) ... [2022-04-05 00:26:58,546 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-05 00:26:58,547 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-05 00:26:58,547 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-05 00:26:58,547 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-05 00:26:58,549 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 12:26:58" (1/1) ... [2022-04-05 00:26:58,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 00:26:58,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 00:26:58,585 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-05 00:26:58,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-05 00:26:58,619 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-05 00:26:58,620 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-05 00:26:58,620 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-05 00:26:58,620 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-05 00:26:58,620 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-05 00:26:58,620 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-05 00:26:58,620 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-05 00:26:58,620 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-05 00:26:58,620 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-04-05 00:26:58,621 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-04-05 00:26:58,621 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-05 00:26:58,621 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-05 00:26:58,621 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-05 00:26:58,621 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-05 00:26:58,621 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-05 00:26:58,621 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-05 00:26:58,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-05 00:26:58,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-05 00:26:58,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-05 00:26:58,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-05 00:26:58,622 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-05 00:26:58,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-05 00:26:58,679 INFO L234 CfgBuilder]: Building ICFG [2022-04-05 00:26:58,681 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-05 00:26:58,927 INFO L275 CfgBuilder]: Performing block encoding [2022-04-05 00:26:58,950 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-05 00:26:58,950 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-05 00:26:58,952 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 12:26:58 BoogieIcfgContainer [2022-04-05 00:26:58,952 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-05 00:26:58,953 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-05 00:26:58,953 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-05 00:26:58,957 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-05 00:26:58,960 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 12:26:58" (1/1) ... [2022-04-05 00:26:58,962 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-04-05 00:26:58,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 12:26:58 BasicIcfg [2022-04-05 00:26:58,989 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-05 00:26:58,990 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-05 00:26:58,990 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-05 00:26:59,000 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-05 00:26:59,001 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.04 12:26:58" (1/4) ... [2022-04-05 00:26:59,003 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d6b663f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 12:26:59, skipping insertion in model container [2022-04-05 00:26:59,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 12:26:58" (2/4) ... [2022-04-05 00:26:59,003 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d6b663f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 12:26:59, skipping insertion in model container [2022-04-05 00:26:59,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 12:26:58" (3/4) ... [2022-04-05 00:26:59,008 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d6b663f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 12:26:59, skipping insertion in model container [2022-04-05 00:26:59,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 12:26:58" (4/4) ... [2022-04-05 00:26:59,016 INFO L111 eAbstractionObserver]: Analyzing ICFG apache-escape-absolute.iJordan [2022-04-05 00:26:59,046 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-04-05 00:26:59,046 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-05 00:26:59,096 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-05 00:26:59,104 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-05 00:26:59,104 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-05 00:26:59,121 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 33 states have internal predecessors, (48), 20 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-04-05 00:26:59,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-05 00:26:59,137 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 00:26:59,137 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 00:26:59,138 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 00:26:59,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 00:26:59,147 INFO L85 PathProgramCache]: Analyzing trace with hash -505878006, now seen corresponding path program 1 times [2022-04-05 00:26:59,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 00:26:59,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789614233] [2022-04-05 00:26:59,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 00:26:59,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 00:26:59,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:26:59,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 00:26:59,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:26:59,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 00:26:59,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 00:26:59,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789614233] [2022-04-05 00:26:59,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789614233] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 00:26:59,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 00:26:59,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-05 00:26:59,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031396419] [2022-04-05 00:26:59,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 00:26:59,462 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-05 00:26:59,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 00:26:59,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-05 00:26:59,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-05 00:26:59,494 INFO L87 Difference]: Start difference. First operand has 54 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 33 states have internal predecessors, (48), 20 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 00:26:59,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 00:26:59,908 INFO L93 Difference]: Finished difference Result 72 states and 112 transitions. [2022-04-05 00:26:59,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-05 00:26:59,910 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-04-05 00:26:59,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 00:26:59,919 INFO L225 Difference]: With dead ends: 72 [2022-04-05 00:26:59,919 INFO L226 Difference]: Without dead ends: 64 [2022-04-05 00:26:59,922 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-04-05 00:26:59,927 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 70 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-05 00:26:59,928 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 82 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-05 00:26:59,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-04-05 00:26:59,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 57. [2022-04-05 00:26:59,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 35 states have internal predecessors, (37), 22 states have call successors, (22), 4 states have call predecessors, (22), 3 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2022-04-05 00:26:59,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 80 transitions. [2022-04-05 00:26:59,976 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 80 transitions. Word has length 17 [2022-04-05 00:26:59,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 00:26:59,976 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 80 transitions. [2022-04-05 00:26:59,977 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 00:26:59,977 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 80 transitions. [2022-04-05 00:26:59,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-05 00:26:59,978 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 00:26:59,978 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 00:26:59,979 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-05 00:26:59,979 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 00:26:59,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 00:26:59,980 INFO L85 PathProgramCache]: Analyzing trace with hash 722598363, now seen corresponding path program 1 times [2022-04-05 00:26:59,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 00:26:59,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139171956] [2022-04-05 00:26:59,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 00:26:59,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 00:26:59,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:27:00,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 00:27:00,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:27:00,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-05 00:27:00,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:27:00,102 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 00:27:00,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 00:27:00,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139171956] [2022-04-05 00:27:00,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139171956] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 00:27:00,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 00:27:00,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-05 00:27:00,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243610344] [2022-04-05 00:27:00,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 00:27:00,105 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-05 00:27:00,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 00:27:00,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-05 00:27:00,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-04-05 00:27:00,106 INFO L87 Difference]: Start difference. First operand 57 states and 80 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-05 00:27:00,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 00:27:00,401 INFO L93 Difference]: Finished difference Result 61 states and 83 transitions. [2022-04-05 00:27:00,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-05 00:27:00,402 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2022-04-05 00:27:00,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 00:27:00,405 INFO L225 Difference]: With dead ends: 61 [2022-04-05 00:27:00,405 INFO L226 Difference]: Without dead ends: 61 [2022-04-05 00:27:00,405 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-04-05 00:27:00,407 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 54 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 00:27:00,407 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 66 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 00:27:00,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-04-05 00:27:00,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-04-05 00:27:00,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 38 states have internal predecessors, (40), 22 states have call successors, (22), 5 states have call predecessors, (22), 4 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2022-04-05 00:27:00,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 83 transitions. [2022-04-05 00:27:00,431 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 83 transitions. Word has length 22 [2022-04-05 00:27:00,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 00:27:00,431 INFO L478 AbstractCegarLoop]: Abstraction has 61 states and 83 transitions. [2022-04-05 00:27:00,431 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-05 00:27:00,432 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 83 transitions. [2022-04-05 00:27:00,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-05 00:27:00,433 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 00:27:00,433 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 00:27:00,433 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-05 00:27:00,434 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 00:27:00,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 00:27:00,434 INFO L85 PathProgramCache]: Analyzing trace with hash 349034817, now seen corresponding path program 1 times [2022-04-05 00:27:00,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 00:27:00,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058898431] [2022-04-05 00:27:00,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 00:27:00,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 00:27:00,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:27:00,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 00:27:00,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:27:00,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-05 00:27:00,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:27:00,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-05 00:27:00,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:27:00,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-05 00:27:00,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:27:00,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-05 00:27:00,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:27:00,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-05 00:27:00,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:27:00,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-04-05 00:27:00,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:27:00,514 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-05 00:27:00,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 00:27:00,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058898431] [2022-04-05 00:27:00,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058898431] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 00:27:00,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 00:27:00,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 00:27:00,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933504725] [2022-04-05 00:27:00,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 00:27:00,516 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 00:27:00,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 00:27:00,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 00:27:00,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 00:27:00,517 INFO L87 Difference]: Start difference. First operand 61 states and 83 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-05 00:27:00,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 00:27:00,624 INFO L93 Difference]: Finished difference Result 64 states and 87 transitions. [2022-04-05 00:27:00,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 00:27:00,625 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 51 [2022-04-05 00:27:00,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 00:27:00,626 INFO L225 Difference]: With dead ends: 64 [2022-04-05 00:27:00,626 INFO L226 Difference]: Without dead ends: 61 [2022-04-05 00:27:00,627 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-05 00:27:00,628 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 28 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 00:27:00,628 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 58 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 00:27:00,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-04-05 00:27:00,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-04-05 00:27:00,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 38 states have internal predecessors, (38), 22 states have call successors, (22), 5 states have call predecessors, (22), 4 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2022-04-05 00:27:00,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 81 transitions. [2022-04-05 00:27:00,645 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 81 transitions. Word has length 51 [2022-04-05 00:27:00,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 00:27:00,645 INFO L478 AbstractCegarLoop]: Abstraction has 61 states and 81 transitions. [2022-04-05 00:27:00,646 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-05 00:27:00,646 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 81 transitions. [2022-04-05 00:27:00,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-05 00:27:00,647 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 00:27:00,647 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 00:27:00,647 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-04-05 00:27:00,648 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 00:27:00,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 00:27:00,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1328286090, now seen corresponding path program 1 times [2022-04-05 00:27:00,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 00:27:00,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492855991] [2022-04-05 00:27:00,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 00:27:00,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 00:27:00,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:27:00,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 00:27:00,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:27:00,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-05 00:27:00,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:27:00,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-05 00:27:00,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:27:00,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-05 00:27:00,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:27:00,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-05 00:27:00,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:27:00,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-05 00:27:00,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:27:00,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-04-05 00:27:00,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:27:00,770 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-05 00:27:00,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 00:27:00,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492855991] [2022-04-05 00:27:00,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492855991] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 00:27:00,771 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 00:27:00,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-05 00:27:00,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708801183] [2022-04-05 00:27:00,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 00:27:00,772 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-05 00:27:00,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 00:27:00,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-05 00:27:00,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-04-05 00:27:00,773 INFO L87 Difference]: Start difference. First operand 61 states and 81 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-04-05 00:27:01,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 00:27:01,002 INFO L93 Difference]: Finished difference Result 66 states and 85 transitions. [2022-04-05 00:27:01,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-05 00:27:01,004 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 52 [2022-04-05 00:27:01,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 00:27:01,005 INFO L225 Difference]: With dead ends: 66 [2022-04-05 00:27:01,005 INFO L226 Difference]: Without dead ends: 66 [2022-04-05 00:27:01,005 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-04-05 00:27:01,007 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 43 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 00:27:01,007 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 64 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 00:27:01,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-04-05 00:27:01,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2022-04-05 00:27:01,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 41 states have internal predecessors, (41), 22 states have call successors, (22), 6 states have call predecessors, (22), 5 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2022-04-05 00:27:01,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 84 transitions. [2022-04-05 00:27:01,014 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 84 transitions. Word has length 52 [2022-04-05 00:27:01,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 00:27:01,015 INFO L478 AbstractCegarLoop]: Abstraction has 65 states and 84 transitions. [2022-04-05 00:27:01,015 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-04-05 00:27:01,015 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 84 transitions. [2022-04-05 00:27:01,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-04-05 00:27:01,017 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 00:27:01,017 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 00:27:01,017 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-04-05 00:27:01,017 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 00:27:01,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 00:27:01,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1785526948, now seen corresponding path program 1 times [2022-04-05 00:27:01,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 00:27:01,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594221700] [2022-04-05 00:27:01,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 00:27:01,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 00:27:01,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:27:01,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 00:27:01,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:27:01,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-05 00:27:01,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:27:01,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-05 00:27:01,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:27:01,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-05 00:27:01,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:27:01,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-05 00:27:01,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:27:01,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-05 00:27:01,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:27:01,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-04-05 00:27:01,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:27:01,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-04-05 00:27:01,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:27:01,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-04-05 00:27:01,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:27:01,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-04-05 00:27:01,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:27:01,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-04-05 00:27:01,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:27:01,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-04-05 00:27:01,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:27:01,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-04-05 00:27:01,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:27:01,165 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-05 00:27:01,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 00:27:01,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594221700] [2022-04-05 00:27:01,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594221700] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 00:27:01,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 00:27:01,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-05 00:27:01,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813444453] [2022-04-05 00:27:01,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 00:27:01,167 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-05 00:27:01,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 00:27:01,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-05 00:27:01,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-04-05 00:27:01,168 INFO L87 Difference]: Start difference. First operand 65 states and 84 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-04-05 00:27:01,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 00:27:01,398 INFO L93 Difference]: Finished difference Result 72 states and 90 transitions. [2022-04-05 00:27:01,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-05 00:27:01,401 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 87 [2022-04-05 00:27:01,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 00:27:01,402 INFO L225 Difference]: With dead ends: 72 [2022-04-05 00:27:01,402 INFO L226 Difference]: Without dead ends: 72 [2022-04-05 00:27:01,403 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-04-05 00:27:01,404 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 37 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 00:27:01,404 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 67 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 00:27:01,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-04-05 00:27:01,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2022-04-05 00:27:01,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 40 states have (on average 1.1) internal successors, (44), 44 states have internal predecessors, (44), 22 states have call successors, (22), 7 states have call predecessors, (22), 6 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2022-04-05 00:27:01,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 87 transitions. [2022-04-05 00:27:01,412 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 87 transitions. Word has length 87 [2022-04-05 00:27:01,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 00:27:01,412 INFO L478 AbstractCegarLoop]: Abstraction has 69 states and 87 transitions. [2022-04-05 00:27:01,413 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-04-05 00:27:01,413 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 87 transitions. [2022-04-05 00:27:01,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-04-05 00:27:01,414 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 00:27:01,414 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 00:27:01,414 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-04-05 00:27:01,415 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 00:27:01,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 00:27:01,415 INFO L85 PathProgramCache]: Analyzing trace with hash 874819922, now seen corresponding path program 1 times [2022-04-05 00:27:01,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 00:27:01,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979706692] [2022-04-05 00:27:01,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 00:27:01,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 00:27:01,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:27:01,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 00:27:01,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:27:01,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-05 00:27:01,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:27:01,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-05 00:27:01,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:27:01,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-05 00:27:01,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:27:01,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-05 00:27:01,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:27:01,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-05 00:27:01,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:27:01,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-04-05 00:27:01,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:27:01,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-04-05 00:27:01,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:27:01,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-04-05 00:27:01,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:27:01,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-04-05 00:27:01,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:27:01,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-04-05 00:27:01,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:27:01,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-04-05 00:27:01,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:27:01,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-04-05 00:27:01,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:27:01,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-04-05 00:27:01,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:27:01,572 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-05 00:27:01,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 00:27:01,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979706692] [2022-04-05 00:27:01,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979706692] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 00:27:01,573 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 00:27:01,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-05 00:27:01,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395390849] [2022-04-05 00:27:01,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 00:27:01,574 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-05 00:27:01,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 00:27:01,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-05 00:27:01,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-04-05 00:27:01,575 INFO L87 Difference]: Start difference. First operand 69 states and 87 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-04-05 00:27:01,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 00:27:01,812 INFO L93 Difference]: Finished difference Result 73 states and 94 transitions. [2022-04-05 00:27:01,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-05 00:27:01,813 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 92 [2022-04-05 00:27:01,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 00:27:01,814 INFO L225 Difference]: With dead ends: 73 [2022-04-05 00:27:01,814 INFO L226 Difference]: Without dead ends: 0 [2022-04-05 00:27:01,814 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-04-05 00:27:01,815 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 38 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 00:27:01,815 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 74 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 00:27:01,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-05 00:27:01,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-05 00:27:01,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-05 00:27:01,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-05 00:27:01,817 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 92 [2022-04-05 00:27:01,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 00:27:01,817 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-05 00:27:01,817 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-04-05 00:27:01,817 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-05 00:27:01,817 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-05 00:27:01,820 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-05 00:27:01,821 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-04-05 00:27:01,824 INFO L719 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-04-05 00:27:01,826 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-05 00:27:01,829 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 12:27:01 BasicIcfg [2022-04-05 00:27:01,829 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-05 00:27:01,830 INFO L158 Benchmark]: Toolchain (without parser) took 3561.52ms. Allocated memory was 189.8MB in the beginning and 254.8MB in the end (delta: 65.0MB). Free memory was 130.0MB in the beginning and 117.3MB in the end (delta: 12.7MB). Peak memory consumption was 77.9MB. Max. memory is 8.0GB. [2022-04-05 00:27:01,830 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 189.8MB. Free memory is still 146.6MB. There was no memory consumed. Max. memory is 8.0GB. [2022-04-05 00:27:01,830 INFO L158 Benchmark]: CACSL2BoogieTranslator took 244.16ms. Allocated memory was 189.8MB in the beginning and 254.8MB in the end (delta: 65.0MB). Free memory was 129.9MB in the beginning and 224.1MB in the end (delta: -94.2MB). Peak memory consumption was 8.1MB. Max. memory is 8.0GB. [2022-04-05 00:27:01,830 INFO L158 Benchmark]: Boogie Preprocessor took 30.43ms. Allocated memory is still 254.8MB. Free memory was 224.1MB in the beginning and 222.6MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-05 00:27:01,831 INFO L158 Benchmark]: RCFGBuilder took 405.21ms. Allocated memory is still 254.8MB. Free memory was 222.6MB in the beginning and 209.5MB in the end (delta: 13.1MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2022-04-05 00:27:01,831 INFO L158 Benchmark]: IcfgTransformer took 36.02ms. Allocated memory is still 254.8MB. Free memory was 209.5MB in the beginning and 207.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-04-05 00:27:01,831 INFO L158 Benchmark]: TraceAbstraction took 2838.99ms. Allocated memory is still 254.8MB. Free memory was 206.8MB in the beginning and 117.3MB in the end (delta: 89.6MB). Peak memory consumption was 90.1MB. Max. memory is 8.0GB. [2022-04-05 00:27:01,833 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 189.8MB. Free memory is still 146.6MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 244.16ms. Allocated memory was 189.8MB in the beginning and 254.8MB in the end (delta: 65.0MB). Free memory was 129.9MB in the beginning and 224.1MB in the end (delta: -94.2MB). Peak memory consumption was 8.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 30.43ms. Allocated memory is still 254.8MB. Free memory was 224.1MB in the beginning and 222.6MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 405.21ms. Allocated memory is still 254.8MB. Free memory was 222.6MB in the beginning and 209.5MB in the end (delta: 13.1MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * IcfgTransformer took 36.02ms. Allocated memory is still 254.8MB. Free memory was 209.5MB in the beginning and 207.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * TraceAbstraction took 2838.99ms. Allocated memory is still 254.8MB. Free memory was 206.8MB in the beginning and 117.3MB in the end (delta: 89.6MB). Peak memory consumption was 90.1MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 54 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2.7s, OverallIterations: 6, TraceHistogramMax: 14, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 324 SdHoareTripleChecker+Valid, 1.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 270 mSDsluCounter, 411 SdHoareTripleChecker+Invalid, 0.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 111 mSDsCounter, 306 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1283 IncrementalHoareTripleChecker+Invalid, 1589 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 306 mSolverCounterUnsat, 300 mSDtfsCounter, 1283 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 146 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=69occurred in iteration=5, InterpolantAutomatonStates: 43, 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, 6 MinimizatonAttempts, 11 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 321 NumberOfCodeBlocks, 321 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 315 ConstructedInterpolants, 0 QuantifiedInterpolants, 511 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 772/772 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-04-05 00:27:01,864 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...