/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-lit/ddlm2013.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 03:38:53,286 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 03:38:53,287 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 03:38:53,313 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 03:38:53,351 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 03:38:53,352 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 03:38:53,354 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 03:38:53,354 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-20 03:38:53,366 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 03:38:53,366 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 03:38:53,367 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 03:38:53,367 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 03:38:53,367 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 03:38:53,367 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 03:38:53,368 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 03:38:53,368 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 03:38:53,368 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 03:38:53,368 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 03:38:53,368 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 03:38:53,368 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 03:38:53,368 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 03:38:53,368 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 03:38:53,368 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 03:38:53,368 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 03:38:53,368 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 03:38:53,369 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 03:38:53,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 03:38:53,369 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 03:38:53,369 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 03:38:53,370 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 03:38:53,370 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 03:38:53,527 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 03:38:53,545 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 03:38:53,546 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 03:38:53,547 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 03:38:53,547 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 03:38:53,548 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/ddlm2013.i [2022-03-20 03:38:53,592 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c57e3c3a8/7e18834f2fdc4cf08e01808cb867b71f/FLAG73c18db2d [2022-03-20 03:38:53,944 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 03:38:53,945 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/ddlm2013.i [2022-03-20 03:38:53,949 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c57e3c3a8/7e18834f2fdc4cf08e01808cb867b71f/FLAG73c18db2d [2022-03-20 03:38:53,957 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c57e3c3a8/7e18834f2fdc4cf08e01808cb867b71f [2022-03-20 03:38:53,958 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 03:38:53,959 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 03:38:53,960 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 03:38:53,960 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 03:38:53,962 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 03:38:53,963 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 03:38:53" (1/1) ... [2022-03-20 03:38:53,964 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@519d55be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:38:53, skipping insertion in model container [2022-03-20 03:38:53,964 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 03:38:53" (1/1) ... [2022-03-20 03:38:53,968 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 03:38:53,977 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 03:38:54,149 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-lit/ddlm2013.i[895,908] [2022-03-20 03:38:54,165 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 03:38:54,169 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 03:38:54,179 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-lit/ddlm2013.i[895,908] [2022-03-20 03:38:54,186 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 03:38:54,194 INFO L208 MainTranslator]: Completed translation [2022-03-20 03:38:54,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:38:54 WrapperNode [2022-03-20 03:38:54,196 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 03:38:54,196 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 03:38:54,196 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 03:38:54,196 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 03:38:54,204 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:38:54" (1/1) ... [2022-03-20 03:38:54,204 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:38:54" (1/1) ... [2022-03-20 03:38:54,210 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:38:54" (1/1) ... [2022-03-20 03:38:54,211 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:38:54" (1/1) ... [2022-03-20 03:38:54,218 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:38:54" (1/1) ... [2022-03-20 03:38:54,221 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:38:54" (1/1) ... [2022-03-20 03:38:54,223 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:38:54" (1/1) ... [2022-03-20 03:38:54,224 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 03:38:54,224 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 03:38:54,224 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 03:38:54,225 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 03:38:54,226 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:38:54" (1/1) ... [2022-03-20 03:38:54,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 03:38:54,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:38:54,267 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) [2022-03-20 03:38:54,282 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 [2022-03-20 03:38:54,307 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 03:38:54,307 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 03:38:54,307 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 03:38:54,308 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 03:38:54,308 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 03:38:54,308 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 03:38:54,308 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 03:38:54,308 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 03:38:54,308 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-20 03:38:54,308 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-20 03:38:54,308 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 03:38:54,308 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 03:38:54,308 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 03:38:54,309 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 03:38:54,309 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 03:38:54,309 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 03:38:54,309 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 03:38:54,309 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 03:38:54,309 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 03:38:54,309 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 03:38:54,309 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 03:38:54,309 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 03:38:54,352 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 03:38:54,354 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 03:38:54,442 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 03:38:54,446 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 03:38:54,447 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 03:38:54,448 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 03:38:54 BoogieIcfgContainer [2022-03-20 03:38:54,448 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 03:38:54,448 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 03:38:54,449 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 03:38:54,449 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 03:38:54,452 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 03:38:54" (1/1) ... [2022-03-20 03:38:54,453 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-03-20 03:38:54,464 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 03:38:54 BasicIcfg [2022-03-20 03:38:54,464 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 03:38:54,465 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 03:38:54,465 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 03:38:54,467 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 03:38:54,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 03:38:53" (1/4) ... [2022-03-20 03:38:54,468 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c5e15fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 03:38:54, skipping insertion in model container [2022-03-20 03:38:54,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:38:54" (2/4) ... [2022-03-20 03:38:54,468 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c5e15fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 03:38:54, skipping insertion in model container [2022-03-20 03:38:54,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 03:38:54" (3/4) ... [2022-03-20 03:38:54,468 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c5e15fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 03:38:54, skipping insertion in model container [2022-03-20 03:38:54,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 03:38:54" (4/4) ... [2022-03-20 03:38:54,469 INFO L111 eAbstractionObserver]: Analyzing ICFG ddlm2013.iJordan [2022-03-20 03:38:54,472 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-20 03:38:54,472 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 03:38:54,507 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 03:38:54,512 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 [2022-03-20 03:38:54,512 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 03:38:54,525 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 17 states have internal predecessors, (22), 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) [2022-03-20 03:38:54,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-20 03:38:54,540 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:38:54,540 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:38:54,541 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:38:54,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:38:54,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1607486853, now seen corresponding path program 1 times [2022-03-20 03:38:54,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:38:54,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866539041] [2022-03-20 03:38:54,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:38:54,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:38:54,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:38:54,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:38:54,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:38:54,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:38:54,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:38:54,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866539041] [2022-03-20 03:38:54,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866539041] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 03:38:54,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 03:38:54,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 03:38:54,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647082536] [2022-03-20 03:38:54,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 03:38:54,729 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 03:38:54,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:38:54,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 03:38:54,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 03:38:54,764 INFO L87 Difference]: Start difference. First operand has 23 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 17 states have internal predecessors, (22), 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 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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) [2022-03-20 03:38:54,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:38:54,800 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2022-03-20 03:38:54,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 03:38:54,808 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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 13 [2022-03-20 03:38:54,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:38:54,813 INFO L225 Difference]: With dead ends: 23 [2022-03-20 03:38:54,813 INFO L226 Difference]: Without dead ends: 16 [2022-03-20 03:38:54,814 INFO L912 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 [2022-03-20 03:38:54,816 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 17 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 03:38:54,817 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 28 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 03:38:54,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-03-20 03:38:54,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-03-20 03:38:54,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 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) [2022-03-20 03:38:54,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-03-20 03:38:54,838 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 13 [2022-03-20 03:38:54,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:38:54,839 INFO L478 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-03-20 03:38:54,839 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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) [2022-03-20 03:38:54,839 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-03-20 03:38:54,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-20 03:38:54,840 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:38:54,840 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:38:54,840 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 03:38:54,841 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:38:54,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:38:54,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1646505343, now seen corresponding path program 1 times [2022-03-20 03:38:54,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:38:54,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894921513] [2022-03-20 03:38:54,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:38:54,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:38:54,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:38:54,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:38:54,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:38:54,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:38:54,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:38:54,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894921513] [2022-03-20 03:38:54,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894921513] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 03:38:54,998 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 03:38:54,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 03:38:54,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471321963] [2022-03-20 03:38:54,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 03:38:55,000 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 03:38:55,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:38:55,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 03:38:55,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 03:38:55,004 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 4 states have internal predecessors, (10), 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) [2022-03-20 03:38:55,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:38:55,080 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2022-03-20 03:38:55,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 03:38:55,080 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 4 states have internal predecessors, (10), 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 14 [2022-03-20 03:38:55,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:38:55,081 INFO L225 Difference]: With dead ends: 22 [2022-03-20 03:38:55,081 INFO L226 Difference]: Without dead ends: 18 [2022-03-20 03:38:55,081 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-20 03:38:55,082 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 18 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 03:38:55,082 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 33 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 03:38:55,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-03-20 03:38:55,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-03-20 03:38:55,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 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) [2022-03-20 03:38:55,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2022-03-20 03:38:55,085 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 14 [2022-03-20 03:38:55,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:38:55,085 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2022-03-20 03:38:55,085 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 4 states have internal predecessors, (10), 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) [2022-03-20 03:38:55,086 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2022-03-20 03:38:55,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 03:38:55,086 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:38:55,086 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:38:55,086 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 03:38:55,086 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:38:55,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:38:55,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1516576148, now seen corresponding path program 1 times [2022-03-20 03:38:55,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:38:55,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948932867] [2022-03-20 03:38:55,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:38:55,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:38:55,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:38:55,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:38:55,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:38:55,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:38:55,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:38:55,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948932867] [2022-03-20 03:38:55,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948932867] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:38:55,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943484230] [2022-03-20 03:38:55,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:38:55,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:38:55,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:38:55,298 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) [2022-03-20 03:38:55,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 03:38:55,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:38:55,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 03:38:55,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:38:55,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:38:55,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:38:55,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:38:55,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943484230] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:38:55,657 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:38:55,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 15 [2022-03-20 03:38:55,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716428480] [2022-03-20 03:38:55,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:38:55,657 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 03:38:55,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:38:55,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 03:38:55,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-03-20 03:38:55,658 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:38:55,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:38:55,835 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2022-03-20 03:38:55,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 03:38:55,836 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-03-20 03:38:55,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:38:55,837 INFO L225 Difference]: With dead ends: 27 [2022-03-20 03:38:55,837 INFO L226 Difference]: Without dead ends: 23 [2022-03-20 03:38:55,838 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2022-03-20 03:38:55,839 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 29 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 03:38:55,839 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 47 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 03:38:55,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-03-20 03:38:55,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2022-03-20 03:38:55,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 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) [2022-03-20 03:38:55,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2022-03-20 03:38:55,842 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 17 [2022-03-20 03:38:55,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:38:55,842 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2022-03-20 03:38:55,842 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:38:55,842 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2022-03-20 03:38:55,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 03:38:55,843 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:38:55,843 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:38:55,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 03:38:56,043 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 [2022-03-20 03:38:56,044 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:38:56,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:38:56,045 INFO L85 PathProgramCache]: Analyzing trace with hash -280375211, now seen corresponding path program 1 times [2022-03-20 03:38:56,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:38:56,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963648753] [2022-03-20 03:38:56,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:38:56,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:38:56,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:38:56,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:38:56,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:38:56,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 03:38:56,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:38:56,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963648753] [2022-03-20 03:38:56,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963648753] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 03:38:56,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 03:38:56,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 03:38:56,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001620365] [2022-03-20 03:38:56,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 03:38:56,078 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 03:38:56,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:38:56,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 03:38:56,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 03:38:56,079 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2022-03-20 03:38:56,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:38:56,100 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2022-03-20 03:38:56,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 03:38:56,101 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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 [2022-03-20 03:38:56,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:38:56,102 INFO L225 Difference]: With dead ends: 27 [2022-03-20 03:38:56,102 INFO L226 Difference]: Without dead ends: 21 [2022-03-20 03:38:56,102 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 03:38:56,103 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 14 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 03:38:56,103 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 29 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 03:38:56,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-03-20 03:38:56,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-03-20 03:38:56,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 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) [2022-03-20 03:38:56,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-03-20 03:38:56,106 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 17 [2022-03-20 03:38:56,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:38:56,106 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-03-20 03:38:56,106 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2022-03-20 03:38:56,106 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-03-20 03:38:56,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-20 03:38:56,106 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:38:56,106 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:38:56,106 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-20 03:38:56,107 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:38:56,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:38:56,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1294800289, now seen corresponding path program 2 times [2022-03-20 03:38:56,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:38:56,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979947596] [2022-03-20 03:38:56,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:38:56,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:38:56,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:38:56,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:38:56,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:38:56,329 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:38:56,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:38:56,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979947596] [2022-03-20 03:38:56,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979947596] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:38:56,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641554875] [2022-03-20 03:38:56,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 03:38:56,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:38:56,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:38:56,331 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) [2022-03-20 03:38:56,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 03:38:56,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 03:38:56,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 03:38:56,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 03:38:56,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:38:56,502 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:38:56,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:38:56,645 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:38:56,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641554875] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:38:56,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:38:56,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-03-20 03:38:56,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003218970] [2022-03-20 03:38:56,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:38:56,647 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 03:38:56,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:38:56,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 03:38:56,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-03-20 03:38:56,648 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 17 states have internal predecessors, (38), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:38:57,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:38:57,137 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2022-03-20 03:38:57,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 03:38:57,137 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 17 states have internal predecessors, (38), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-03-20 03:38:57,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:38:57,138 INFO L225 Difference]: With dead ends: 41 [2022-03-20 03:38:57,138 INFO L226 Difference]: Without dead ends: 31 [2022-03-20 03:38:57,138 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=166, Invalid=826, Unknown=0, NotChecked=0, Total=992 [2022-03-20 03:38:57,139 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 41 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 03:38:57,139 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 67 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 03:38:57,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-03-20 03:38:57,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2022-03-20 03:38:57,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 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) [2022-03-20 03:38:57,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2022-03-20 03:38:57,141 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 20 [2022-03-20 03:38:57,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:38:57,142 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2022-03-20 03:38:57,142 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 17 states have internal predecessors, (38), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:38:57,142 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2022-03-20 03:38:57,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 03:38:57,142 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:38:57,142 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:38:57,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 03:38:57,343 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:38:57,343 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:38:57,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:38:57,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1767065291, now seen corresponding path program 1 times [2022-03-20 03:38:57,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:38:57,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575622148] [2022-03-20 03:38:57,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:38:57,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:38:57,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:38:57,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:38:57,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:38:57,417 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 03:38:57,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:38:57,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575622148] [2022-03-20 03:38:57,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575622148] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:38:57,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011958188] [2022-03-20 03:38:57,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:38:57,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:38:57,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:38:57,421 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) [2022-03-20 03:38:57,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 03:38:57,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:38:57,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 03:38:57,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:38:57,509 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 03:38:57,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:38:57,544 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-20 03:38:57,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011958188] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 03:38:57,544 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-20 03:38:57,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6, 5] total 8 [2022-03-20 03:38:57,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914676104] [2022-03-20 03:38:57,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 03:38:57,545 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 03:38:57,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:38:57,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 03:38:57,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-03-20 03:38:57,545 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 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) [2022-03-20 03:38:57,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:38:57,555 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2022-03-20 03:38:57,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 03:38:57,555 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 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 23 [2022-03-20 03:38:57,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:38:57,556 INFO L225 Difference]: With dead ends: 13 [2022-03-20 03:38:57,556 INFO L226 Difference]: Without dead ends: 0 [2022-03-20 03:38:57,556 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-03-20 03:38:57,557 INFO L913 BasicCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 03:38:57,557 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 03:38:57,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-20 03:38:57,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-20 03:38:57,558 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) [2022-03-20 03:38:57,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-20 03:38:57,558 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23 [2022-03-20 03:38:57,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:38:57,558 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-20 03:38:57,558 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 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) [2022-03-20 03:38:57,558 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-20 03:38:57,558 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-20 03:38:57,560 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 03:38:57,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 03:38:57,777 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:38:57,779 INFO L719 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1] [2022-03-20 03:38:57,780 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 03:38:57,782 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 03:38:57 BasicIcfg [2022-03-20 03:38:57,782 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 03:38:57,783 INFO L158 Benchmark]: Toolchain (without parser) took 3823.45ms. Allocated memory was 166.7MB in the beginning and 226.5MB in the end (delta: 59.8MB). Free memory was 116.6MB in the beginning and 83.7MB in the end (delta: 32.9MB). Peak memory consumption was 92.9MB. Max. memory is 8.0GB. [2022-03-20 03:38:57,783 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 166.7MB. Free memory was 132.6MB in the beginning and 132.5MB in the end (delta: 136.3kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 03:38:57,783 INFO L158 Benchmark]: CACSL2BoogieTranslator took 235.39ms. Allocated memory was 166.7MB in the beginning and 226.5MB in the end (delta: 59.8MB). Free memory was 116.5MB in the beginning and 202.8MB in the end (delta: -86.3MB). Peak memory consumption was 14.1MB. Max. memory is 8.0GB. [2022-03-20 03:38:57,783 INFO L158 Benchmark]: Boogie Preprocessor took 27.54ms. Allocated memory is still 226.5MB. Free memory was 202.8MB in the beginning and 201.7MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-20 03:38:57,784 INFO L158 Benchmark]: RCFGBuilder took 223.67ms. Allocated memory is still 226.5MB. Free memory was 201.7MB in the beginning and 190.7MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-20 03:38:57,784 INFO L158 Benchmark]: IcfgTransformer took 15.36ms. Allocated memory is still 226.5MB. Free memory was 190.7MB in the beginning and 189.7MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 03:38:57,784 INFO L158 Benchmark]: TraceAbstraction took 3317.49ms. Allocated memory is still 226.5MB. Free memory was 189.2MB in the beginning and 83.7MB in the end (delta: 105.5MB). Peak memory consumption was 107.1MB. Max. memory is 8.0GB. [2022-03-20 03:38:57,785 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 166.7MB. Free memory was 132.6MB in the beginning and 132.5MB in the end (delta: 136.3kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 235.39ms. Allocated memory was 166.7MB in the beginning and 226.5MB in the end (delta: 59.8MB). Free memory was 116.5MB in the beginning and 202.8MB in the end (delta: -86.3MB). Peak memory consumption was 14.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 27.54ms. Allocated memory is still 226.5MB. Free memory was 202.8MB in the beginning and 201.7MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 223.67ms. Allocated memory is still 226.5MB. Free memory was 201.7MB in the beginning and 190.7MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 15.36ms. Allocated memory is still 226.5MB. Free memory was 190.7MB in the beginning and 189.7MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 3317.49ms. Allocated memory is still 226.5MB. Free memory was 189.2MB in the beginning and 83.7MB in the end (delta: 105.5MB). Peak memory consumption was 107.1MB. 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, 23 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 3.3s, OverallIterations: 6, TraceHistogramMax: 4, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 120 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 119 mSDsluCounter, 217 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 116 mSDsCounter, 52 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 318 IncrementalHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 52 mSolverCounterUnsat, 101 mSDtfsCounter, 318 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 184 GetRequests, 113 SyntacticMatches, 5 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=5, InterpolantAutomatonStates: 40, 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, 9 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 164 NumberOfCodeBlocks, 164 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 212 ConstructedInterpolants, 0 QuantifiedInterpolants, 1330 SizeOfPredicates, 5 NumberOfNonLiveVariables, 263 ConjunctsInSsa, 45 ConjunctsInUnsatCore, 12 InterpolantComputations, 4 PerfectInterpolantSequences, 41/74 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! [2022-03-20 03:38:57,800 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...