/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/loops-crafted-1/loopv3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-18 17:43:10,909 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 17:43:10,910 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 17:43:10,941 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-18 17:43:10,942 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-18 17:43:10,943 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-18 17:43:10,944 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-18 17:43:10,945 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-18 17:43:10,947 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-18 17:43:10,950 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-18 17:43:10,951 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-18 17:43:10,952 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-18 17:43:10,952 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-18 17:43:10,953 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-18 17:43:10,953 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-18 17:43:10,954 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-18 17:43:10,954 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-18 17:43:10,955 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-18 17:43:10,956 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-18 17:43:10,958 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-18 17:43:10,959 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-18 17:43:10,966 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-18 17:43:10,968 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-18 17:43:10,971 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-18 17:43:10,973 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-18 17:43:10,978 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-18 17:43:10,991 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 17:43:10,991 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 17:43:10,992 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 17:43:10,992 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-18 17:43:10,999 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 17:43:10,999 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 17:43:11,000 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 17:43:11,000 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-18 17:43:11,000 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 17:43:11,000 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-18 17:43:11,000 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 17:43:11,001 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 17:43:11,001 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 17:43:11,001 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 17:43:11,001 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-18 17:43:11,001 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 17:43:11,001 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 17:43:11,001 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 17:43:11,001 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 17:43:11,002 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 17:43:11,002 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 17:43:11,002 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 17:43:11,002 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 17:43:11,002 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 17:43:11,002 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 17:43:11,003 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-18 17:43:11,003 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 17:43:11,202 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 17:43:11,235 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 17:43:11,237 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 17:43:11,238 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 17:43:11,248 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 17:43:11,249 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/loopv3.c [2022-03-18 17:43:11,297 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/96af32fb5/082eb965e2b5453ba5741fa8e7aa5079/FLAG29469abf5 [2022-03-18 17:43:11,621 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 17:43:11,622 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/loopv3.c [2022-03-18 17:43:11,626 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/96af32fb5/082eb965e2b5453ba5741fa8e7aa5079/FLAG29469abf5 [2022-03-18 17:43:12,038 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/96af32fb5/082eb965e2b5453ba5741fa8e7aa5079 [2022-03-18 17:43:12,040 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 17:43:12,041 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-18 17:43:12,042 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 17:43:12,042 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 17:43:12,044 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 17:43:12,045 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 05:43:12" (1/1) ... [2022-03-18 17:43:12,046 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3de3d610 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:43:12, skipping insertion in model container [2022-03-18 17:43:12,046 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 05:43:12" (1/1) ... [2022-03-18 17:43:12,051 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 17:43:12,060 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 17:43:12,225 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/loopv3.c[456,469] [2022-03-18 17:43:12,255 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 17:43:12,264 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 17:43:12,277 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/loopv3.c[456,469] [2022-03-18 17:43:12,279 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 17:43:12,288 INFO L208 MainTranslator]: Completed translation [2022-03-18 17:43:12,289 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:43:12 WrapperNode [2022-03-18 17:43:12,289 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 17:43:12,291 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 17:43:12,291 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 17:43:12,291 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 17:43:12,300 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:43:12" (1/1) ... [2022-03-18 17:43:12,300 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:43:12" (1/1) ... [2022-03-18 17:43:12,304 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:43:12" (1/1) ... [2022-03-18 17:43:12,304 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:43:12" (1/1) ... [2022-03-18 17:43:12,313 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:43:12" (1/1) ... [2022-03-18 17:43:12,316 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:43:12" (1/1) ... [2022-03-18 17:43:12,318 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:43:12" (1/1) ... [2022-03-18 17:43:12,320 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 17:43:12,320 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 17:43:12,320 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 17:43:12,320 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 17:43:12,321 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:43:12" (1/1) ... [2022-03-18 17:43:12,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 17:43:12,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 17:43:12,373 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-18 17:43:12,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-18 17:43:12,413 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 17:43:12,413 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 17:43:12,413 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 17:43:12,414 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 17:43:12,414 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 17:43:12,414 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 17:43:12,414 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-18 17:43:12,414 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 17:43:12,414 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 17:43:12,414 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 17:43:12,414 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 17:43:12,415 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 17:43:12,415 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 17:43:12,415 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 17:43:12,416 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 17:43:12,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 17:43:12,416 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 17:43:12,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 17:43:12,416 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 17:43:12,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 17:43:12,475 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 17:43:12,476 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 17:43:12,550 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 17:43:12,554 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 17:43:12,554 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-18 17:43:12,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 05:43:12 BoogieIcfgContainer [2022-03-18 17:43:12,555 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 17:43:12,556 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-18 17:43:12,556 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-18 17:43:12,557 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-18 17:43:12,559 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 05:43:12" (1/1) ... [2022-03-18 17:43:12,569 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 05:43:12 BasicIcfg [2022-03-18 17:43:12,569 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-18 17:43:12,570 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 17:43:12,570 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 17:43:12,572 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 17:43:12,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 05:43:12" (1/4) ... [2022-03-18 17:43:12,573 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78fac17f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 05:43:12, skipping insertion in model container [2022-03-18 17:43:12,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:43:12" (2/4) ... [2022-03-18 17:43:12,573 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78fac17f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 05:43:12, skipping insertion in model container [2022-03-18 17:43:12,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 05:43:12" (3/4) ... [2022-03-18 17:43:12,574 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78fac17f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 05:43:12, skipping insertion in model container [2022-03-18 17:43:12,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 05:43:12" (4/4) ... [2022-03-18 17:43:12,574 INFO L111 eAbstractionObserver]: Analyzing ICFG loopv3.cJordan [2022-03-18 17:43:12,578 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-18 17:43:12,578 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 17:43:12,606 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 17:43:12,610 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-18 17:43:12,610 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 17:43:12,626 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 17:43:12,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-18 17:43:12,631 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:43:12,631 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:43:12,632 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:43:12,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:43:12,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1479494173, now seen corresponding path program 1 times [2022-03-18 17:43:12,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:43:12,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565292872] [2022-03-18 17:43:12,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:43:12,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:43:12,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:43:12,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:43:12,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:43:12,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 17:43:12,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:43:12,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565292872] [2022-03-18 17:43:12,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565292872] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 17:43:12,801 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 17:43:12,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 17:43:12,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842183986] [2022-03-18 17:43:12,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 17:43:12,805 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 17:43:12,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:43:12,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 17:43:12,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 17:43:12,829 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:43:12,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:43:12,853 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2022-03-18 17:43:12,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 17:43:12,856 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-18 17:43:12,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:43:12,861 INFO L225 Difference]: With dead ends: 21 [2022-03-18 17:43:12,861 INFO L226 Difference]: Without dead ends: 14 [2022-03-18 17:43:12,863 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 17:43:12,866 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 13 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 17:43:12,867 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 22 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 17:43:12,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-03-18 17:43:12,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-03-18 17:43:12,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:43:12,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2022-03-18 17:43:12,902 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2022-03-18 17:43:12,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:43:12,903 INFO L478 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2022-03-18 17:43:12,903 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:43:12,904 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2022-03-18 17:43:12,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-18 17:43:12,904 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:43:12,904 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:43:12,905 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 17:43:12,905 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:43:12,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:43:12,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1508123324, now seen corresponding path program 1 times [2022-03-18 17:43:12,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:43:12,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143461843] [2022-03-18 17:43:12,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:43:12,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:43:12,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:43:13,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:43:13,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:43:13,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 17:43:13,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:43:13,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143461843] [2022-03-18 17:43:13,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143461843] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 17:43:13,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 17:43:13,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 17:43:13,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262744829] [2022-03-18 17:43:13,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 17:43:13,022 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 17:43:13,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:43:13,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 17:43:13,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-18 17:43:13,023 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:43:13,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:43:13,074 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2022-03-18 17:43:13,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 17:43:13,074 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-18 17:43:13,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:43:13,076 INFO L225 Difference]: With dead ends: 16 [2022-03-18 17:43:13,076 INFO L226 Difference]: Without dead ends: 16 [2022-03-18 17:43:13,076 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-18 17:43:13,077 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 17:43:13,078 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 14 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 17:43:13,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-03-18 17:43:13,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2022-03-18 17:43:13,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:43:13,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-03-18 17:43:13,081 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2022-03-18 17:43:13,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:43:13,081 INFO L478 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-03-18 17:43:13,081 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:43:13,081 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-03-18 17:43:13,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-18 17:43:13,082 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:43:13,082 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:43:13,082 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 17:43:13,082 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:43:13,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:43:13,083 INFO L85 PathProgramCache]: Analyzing trace with hash 89998238, now seen corresponding path program 1 times [2022-03-18 17:43:13,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:43:13,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661428027] [2022-03-18 17:43:13,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:43:13,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:43:13,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:43:13,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:43:13,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:43:13,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 17:43:13,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:43:13,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661428027] [2022-03-18 17:43:13,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661428027] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 17:43:13,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508002446] [2022-03-18 17:43:13,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:43:13,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:43:13,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 17:43:13,189 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 17:43:13,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 17:43:13,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:43:13,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 17:43:13,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 17:43:13,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 17:43:13,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 17:43:13,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 17:43:13,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508002446] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 17:43:13,389 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 17:43:13,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-03-18 17:43:13,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395060740] [2022-03-18 17:43:13,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 17:43:13,390 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-18 17:43:13,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:43:13,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-18 17:43:13,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-03-18 17:43:13,391 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 4 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-18 17:43:13,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:43:13,480 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2022-03-18 17:43:13,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 17:43:13,481 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 4 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2022-03-18 17:43:13,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:43:13,481 INFO L225 Difference]: With dead ends: 21 [2022-03-18 17:43:13,482 INFO L226 Difference]: Without dead ends: 21 [2022-03-18 17:43:13,482 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2022-03-18 17:43:13,483 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 28 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 17:43:13,483 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 20 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 17:43:13,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-03-18 17:43:13,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-03-18 17:43:13,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:43:13,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-03-18 17:43:13,487 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2022-03-18 17:43:13,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:43:13,487 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-03-18 17:43:13,487 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 4 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-18 17:43:13,487 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-03-18 17:43:13,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-18 17:43:13,488 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:43:13,488 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:43:13,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-18 17:43:13,701 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:43:13,701 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:43:13,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:43:13,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1261632700, now seen corresponding path program 2 times [2022-03-18 17:43:13,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:43:13,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348492708] [2022-03-18 17:43:13,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:43:13,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:43:13,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:43:13,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:43:13,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:43:13,813 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 17:43:13,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:43:13,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348492708] [2022-03-18 17:43:13,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348492708] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 17:43:13,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431986458] [2022-03-18 17:43:13,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 17:43:13,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:43:13,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 17:43:13,828 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 17:43:13,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 17:43:13,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 17:43:13,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 17:43:13,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 17:43:13,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 17:43:13,998 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 17:43:13,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 17:43:14,110 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 17:43:14,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431986458] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 17:43:14,111 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 17:43:14,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2022-03-18 17:43:14,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239071936] [2022-03-18 17:43:14,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 17:43:14,114 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-18 17:43:14,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:43:14,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-18 17:43:14,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=231, Unknown=0, NotChecked=0, Total=380 [2022-03-18 17:43:14,118 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 18 states have internal predecessors, (39), 4 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-18 17:43:14,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:43:14,356 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2022-03-18 17:43:14,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-18 17:43:14,357 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 18 states have internal predecessors, (39), 4 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2022-03-18 17:43:14,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:43:14,359 INFO L225 Difference]: With dead ends: 33 [2022-03-18 17:43:14,359 INFO L226 Difference]: Without dead ends: 33 [2022-03-18 17:43:14,359 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=329, Invalid=601, Unknown=0, NotChecked=0, Total=930 [2022-03-18 17:43:14,361 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 48 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 17:43:14,362 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 28 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 17:43:14,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-18 17:43:14,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-03-18 17:43:14,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:43:14,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2022-03-18 17:43:14,369 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 20 [2022-03-18 17:43:14,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:43:14,369 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2022-03-18 17:43:14,370 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 18 states have internal predecessors, (39), 4 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-18 17:43:14,370 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2022-03-18 17:43:14,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-18 17:43:14,370 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:43:14,370 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:43:14,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 17:43:14,593 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-18 17:43:14,593 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:43:14,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:43:14,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1413178640, now seen corresponding path program 3 times [2022-03-18 17:43:14,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:43:14,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867123430] [2022-03-18 17:43:14,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:43:14,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:43:14,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:43:14,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:43:14,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:43:14,735 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 17:43:14,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:43:14,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867123430] [2022-03-18 17:43:14,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867123430] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 17:43:14,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644767163] [2022-03-18 17:43:14,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 17:43:14,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:43:14,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 17:43:14,752 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 17:43:14,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 17:43:14,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-03-18 17:43:14,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 17:43:14,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-18 17:43:14,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 17:43:15,010 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 17:43:15,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 17:43:15,232 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 17:43:15,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644767163] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 17:43:15,233 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 17:43:15,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 38 [2022-03-18 17:43:15,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011467076] [2022-03-18 17:43:15,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 17:43:15,233 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-18 17:43:15,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:43:15,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-18 17:43:15,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=581, Invalid=825, Unknown=0, NotChecked=0, Total=1406 [2022-03-18 17:43:15,235 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 38 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 36 states have internal predecessors, (75), 4 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-18 17:43:15,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:43:15,723 INFO L93 Difference]: Finished difference Result 57 states and 79 transitions. [2022-03-18 17:43:15,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-18 17:43:15,724 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 36 states have internal predecessors, (75), 4 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2022-03-18 17:43:15,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:43:15,724 INFO L225 Difference]: With dead ends: 57 [2022-03-18 17:43:15,725 INFO L226 Difference]: Without dead ends: 57 [2022-03-18 17:43:15,726 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1268, Invalid=2392, Unknown=0, NotChecked=0, Total=3660 [2022-03-18 17:43:15,726 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 79 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 17:43:15,726 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 26 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 17:43:15,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-03-18 17:43:15,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-03-18 17:43:15,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.4423076923076923) internal successors, (75), 52 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:43:15,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 79 transitions. [2022-03-18 17:43:15,730 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 79 transitions. Word has length 32 [2022-03-18 17:43:15,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:43:15,731 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 79 transitions. [2022-03-18 17:43:15,731 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 36 states have internal predecessors, (75), 4 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-18 17:43:15,731 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 79 transitions. [2022-03-18 17:43:15,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-18 17:43:15,732 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:43:15,732 INFO L500 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:43:15,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 17:43:15,949 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:43:15,950 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:43:15,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:43:15,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1302475432, now seen corresponding path program 4 times [2022-03-18 17:43:15,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:43:15,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072935340] [2022-03-18 17:43:15,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:43:15,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:43:15,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:43:16,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:43:16,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:43:16,278 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 17:43:16,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:43:16,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072935340] [2022-03-18 17:43:16,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072935340] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 17:43:16,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017307432] [2022-03-18 17:43:16,278 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 17:43:16,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:43:16,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 17:43:16,297 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 17:43:16,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 17:43:16,335 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 17:43:16,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 17:43:16,336 WARN L261 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-18 17:43:16,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 17:43:16,896 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 17:43:16,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 17:43:17,752 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-03-18 17:43:17,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017307432] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-18 17:43:17,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-18 17:43:17,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [26, 28] total 55 [2022-03-18 17:43:17,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653687065] [2022-03-18 17:43:17,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 17:43:17,753 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 17:43:17,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:43:17,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 17:43:17,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=390, Invalid=2580, Unknown=0, NotChecked=0, Total=2970 [2022-03-18 17:43:17,754 INFO L87 Difference]: Start difference. First operand 57 states and 79 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:43:17,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:43:17,784 INFO L93 Difference]: Finished difference Result 55 states and 77 transitions. [2022-03-18 17:43:17,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 17:43:17,784 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 2 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 56 [2022-03-18 17:43:17,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:43:17,785 INFO L225 Difference]: With dead ends: 55 [2022-03-18 17:43:17,785 INFO L226 Difference]: Without dead ends: 0 [2022-03-18 17:43:17,785 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 62 SyntacticMatches, 23 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1273 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=394, Invalid=2686, Unknown=0, NotChecked=0, Total=3080 [2022-03-18 17:43:17,786 INFO L912 BasicCegarLoop]: 7 mSDtfsCounter, 3 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 17:43:17,786 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 26 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 17:43:17,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-18 17:43:17,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-18 17:43:17,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-18 17:43:17,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-18 17:43:17,787 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 56 [2022-03-18 17:43:17,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:43:17,787 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-18 17:43:17,787 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:43:17,787 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-18 17:43:17,787 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-18 17:43:17,789 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-18 17:43:17,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-18 17:43:17,995 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:43:17,998 INFO L718 BasicCegarLoop]: Path program histogram: [4, 1, 1] [2022-03-18 17:43:17,999 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-18 17:43:18,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 05:43:18 BasicIcfg [2022-03-18 17:43:18,001 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-18 17:43:18,001 INFO L158 Benchmark]: Toolchain (without parser) took 5960.62ms. Allocated memory was 183.5MB in the beginning and 293.6MB in the end (delta: 110.1MB). Free memory was 125.2MB in the beginning and 135.3MB in the end (delta: -10.1MB). Peak memory consumption was 101.1MB. Max. memory is 8.0GB. [2022-03-18 17:43:18,001 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 183.5MB. Free memory is still 141.2MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-18 17:43:18,002 INFO L158 Benchmark]: CACSL2BoogieTranslator took 247.51ms. Allocated memory was 183.5MB in the beginning and 293.6MB in the end (delta: 110.1MB). Free memory was 125.0MB in the beginning and 264.8MB in the end (delta: -139.8MB). Peak memory consumption was 11.6MB. Max. memory is 8.0GB. [2022-03-18 17:43:18,002 INFO L158 Benchmark]: Boogie Preprocessor took 28.71ms. Allocated memory is still 293.6MB. Free memory was 264.8MB in the beginning and 263.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-18 17:43:18,002 INFO L158 Benchmark]: RCFGBuilder took 235.25ms. Allocated memory is still 293.6MB. Free memory was 263.2MB in the beginning and 253.8MB in the end (delta: 9.4MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-18 17:43:18,002 INFO L158 Benchmark]: IcfgTransformer took 13.26ms. Allocated memory is still 293.6MB. Free memory was 253.8MB in the beginning and 252.7MB in the end (delta: 1.1MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-18 17:43:18,002 INFO L158 Benchmark]: TraceAbstraction took 5430.52ms. Allocated memory is still 293.6MB. Free memory was 252.2MB in the beginning and 135.3MB in the end (delta: 116.9MB). Peak memory consumption was 118.0MB. Max. memory is 8.0GB. [2022-03-18 17:43:18,003 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 183.5MB. Free memory is still 141.2MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 247.51ms. Allocated memory was 183.5MB in the beginning and 293.6MB in the end (delta: 110.1MB). Free memory was 125.0MB in the beginning and 264.8MB in the end (delta: -139.8MB). Peak memory consumption was 11.6MB. Max. memory is 8.0GB. * Boogie Preprocessor took 28.71ms. Allocated memory is still 293.6MB. Free memory was 264.8MB in the beginning and 263.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 235.25ms. Allocated memory is still 293.6MB. Free memory was 263.2MB in the beginning and 253.8MB in the end (delta: 9.4MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * IcfgTransformer took 13.26ms. Allocated memory is still 293.6MB. Free memory was 253.8MB in the beginning and 252.7MB in the end (delta: 1.1MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 5430.52ms. Allocated memory is still 293.6MB. Free memory was 252.2MB in the beginning and 135.3MB in the end (delta: 116.9MB). Peak memory consumption was 118.0MB. 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 - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 5.4s, OverallIterations: 6, TraceHistogramMax: 22, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 193 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 192 mSDsluCounter, 136 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 66 mSDsCounter, 260 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 338 IncrementalHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 260 mSolverCounterUnsat, 70 mSDtfsCounter, 338 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 349 GetRequests, 164 SyntacticMatches, 23 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2531 ImplicationChecksByTransitivity, 2.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=57occurred in iteration=5, InterpolantAutomatonStates: 66, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.0s InterpolantComputationTime, 268 NumberOfCodeBlocks, 245 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 376 ConstructedInterpolants, 0 QuantifiedInterpolants, 1626 SizeOfPredicates, 7 NumberOfNonLiveVariables, 375 ConjunctsInSsa, 75 ConjunctsInUnsatCore, 14 InterpolantComputations, 3 PerfectInterpolantSequences, 484/1803 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-03-18 17:43:18,053 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...