/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/nla-digbench-scaling/mannadiv_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-18 20:26:19,400 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 20:26:19,432 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 20:26:19,460 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-18 20:26:19,460 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-18 20:26:19,461 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-18 20:26:19,464 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-18 20:26:19,467 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-18 20:26:19,468 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-18 20:26:19,472 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-18 20:26:19,472 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-18 20:26:19,473 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-18 20:26:19,474 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-18 20:26:19,475 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-18 20:26:19,476 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-18 20:26:19,478 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-18 20:26:19,478 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-18 20:26:19,479 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-18 20:26:19,481 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-18 20:26:19,485 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-18 20:26:19,486 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-18 20:26:19,487 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-18 20:26:19,487 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-18 20:26:19,488 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-18 20:26:19,488 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-18 20:26:19,490 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-18 20:26:19,496 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 20:26:19,496 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 20:26:19,497 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 20:26:19,498 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-18 20:26:19,505 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 20:26:19,506 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 20:26:19,508 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 20:26:19,508 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-18 20:26:19,508 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 20:26:19,508 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-18 20:26:19,508 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 20:26:19,508 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 20:26:19,508 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 20:26:19,509 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 20:26:19,509 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-18 20:26:19,509 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 20:26:19,509 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 20:26:19,509 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 20:26:19,509 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 20:26:19,509 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 20:26:19,510 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 20:26:19,510 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 20:26:19,510 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 20:26:19,510 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 20:26:19,510 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 20:26:19,510 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-18 20:26:19,510 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 20:26:19,675 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 20:26:19,694 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 20:26:19,696 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 20:26:19,697 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 20:26:19,697 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 20:26:19,698 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/mannadiv_valuebound10.c [2022-03-18 20:26:19,743 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae77b31c5/5bf36549c1224887a191069de9a54da2/FLAG1b0220a94 [2022-03-18 20:26:20,085 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 20:26:20,086 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/mannadiv_valuebound10.c [2022-03-18 20:26:20,089 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae77b31c5/5bf36549c1224887a191069de9a54da2/FLAG1b0220a94 [2022-03-18 20:26:20,099 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae77b31c5/5bf36549c1224887a191069de9a54da2 [2022-03-18 20:26:20,101 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 20:26:20,101 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-18 20:26:20,104 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 20:26:20,104 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 20:26:20,106 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 20:26:20,107 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 08:26:20" (1/1) ... [2022-03-18 20:26:20,108 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12e8b583 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 08:26:20, skipping insertion in model container [2022-03-18 20:26:20,108 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 08:26:20" (1/1) ... [2022-03-18 20:26:20,113 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 20:26:20,122 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 20:26:20,266 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/mannadiv_valuebound10.c[573,586] [2022-03-18 20:26:20,278 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 20:26:20,283 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 20:26:20,294 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/mannadiv_valuebound10.c[573,586] [2022-03-18 20:26:20,300 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 20:26:20,311 INFO L208 MainTranslator]: Completed translation [2022-03-18 20:26:20,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 08:26:20 WrapperNode [2022-03-18 20:26:20,311 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 20:26:20,313 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 20:26:20,313 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 20:26:20,313 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 20:26:20,321 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 08:26:20" (1/1) ... [2022-03-18 20:26:20,321 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 08:26:20" (1/1) ... [2022-03-18 20:26:20,327 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 08:26:20" (1/1) ... [2022-03-18 20:26:20,327 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 08:26:20" (1/1) ... [2022-03-18 20:26:20,335 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 08:26:20" (1/1) ... [2022-03-18 20:26:20,338 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 08:26:20" (1/1) ... [2022-03-18 20:26:20,342 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 08:26:20" (1/1) ... [2022-03-18 20:26:20,346 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 20:26:20,347 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 20:26:20,348 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 20:26:20,348 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 20:26:20,348 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 08:26:20" (1/1) ... [2022-03-18 20:26:20,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 20:26:20,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:26:20,391 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 20:26:20,408 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 20:26:20,427 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 20:26:20,427 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 20:26:20,427 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 20:26:20,427 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 20:26:20,427 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 20:26:20,428 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 20:26:20,428 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 20:26:20,428 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 20:26:20,428 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 20:26:20,428 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 20:26:20,428 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-18 20:26:20,428 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 20:26:20,429 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 20:26:20,429 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 20:26:20,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 20:26:20,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 20:26:20,430 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 20:26:20,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 20:26:20,430 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 20:26:20,430 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 20:26:20,478 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 20:26:20,480 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 20:26:20,552 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 20:26:20,565 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 20:26:20,565 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-18 20:26:20,576 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 08:26:20 BoogieIcfgContainer [2022-03-18 20:26:20,576 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 20:26:20,577 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-18 20:26:20,577 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-18 20:26:20,580 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-18 20:26:20,582 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 08:26:20" (1/1) ... [2022-03-18 20:26:20,593 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 08:26:20 BasicIcfg [2022-03-18 20:26:20,593 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-18 20:26:20,594 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 20:26:20,594 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 20:26:20,617 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 20:26:20,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 08:26:20" (1/4) ... [2022-03-18 20:26:20,617 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f22ebc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 08:26:20, skipping insertion in model container [2022-03-18 20:26:20,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 08:26:20" (2/4) ... [2022-03-18 20:26:20,618 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f22ebc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 08:26:20, skipping insertion in model container [2022-03-18 20:26:20,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 08:26:20" (3/4) ... [2022-03-18 20:26:20,618 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f22ebc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 08:26:20, skipping insertion in model container [2022-03-18 20:26:20,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 08:26:20" (4/4) ... [2022-03-18 20:26:20,619 INFO L111 eAbstractionObserver]: Analyzing ICFG mannadiv_valuebound10.cJordan [2022-03-18 20:26:20,622 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-18 20:26:20,622 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 20:26:20,673 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 20:26:20,678 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 20:26:20,678 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 20:26:20,690 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-18 20:26:20,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-18 20:26:20,695 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:26:20,695 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:26:20,695 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:26:20,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:26:20,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1058806997, now seen corresponding path program 1 times [2022-03-18 20:26:20,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:26:20,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528059270] [2022-03-18 20:26:20,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:26:20,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:26:20,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 20:26:20,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 20:26:20,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 20:26:20,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 20:26:20,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 20:26:20,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-18 20:26:20,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 20:26:20,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 20:26:20,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:26:20,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528059270] [2022-03-18 20:26:20,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528059270] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 20:26:20,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 20:26:20,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 20:26:20,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468856441] [2022-03-18 20:26:20,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 20:26:20,857 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 20:26:20,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:26:20,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 20:26:20,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 20:26:20,883 INFO L87 Difference]: Start difference. First operand has 29 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 20:26:20,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:26:20,941 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2022-03-18 20:26:20,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 20:26:20,944 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2022-03-18 20:26:20,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:26:20,955 INFO L225 Difference]: With dead ends: 29 [2022-03-18 20:26:20,955 INFO L226 Difference]: Without dead ends: 24 [2022-03-18 20:26:20,957 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 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 20:26:20,959 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 17 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 20:26:20,959 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 31 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 20:26:20,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-03-18 20:26:20,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-03-18 20:26:20,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-18 20:26:20,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-03-18 20:26:20,985 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 22 [2022-03-18 20:26:20,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:26:20,986 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-03-18 20:26:20,986 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 20:26:20,987 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-03-18 20:26:20,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-18 20:26:20,988 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:26:20,988 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:26:20,989 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 20:26:20,989 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:26:20,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:26:20,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1056930164, now seen corresponding path program 1 times [2022-03-18 20:26:20,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:26:20,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254960271] [2022-03-18 20:26:20,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:26:20,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:26:21,017 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:26:21,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [214123939] [2022-03-18 20:26:21,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:26:21,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:26:21,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:26:21,024 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 20:26:21,026 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 20:26:21,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 20:26:21,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-18 20:26:21,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:26:21,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 20:26:21,252 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 20:26:21,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:26:21,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254960271] [2022-03-18 20:26:21,253 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:26:21,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214123939] [2022-03-18 20:26:21,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214123939] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 20:26:21,257 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 20:26:21,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 20:26:21,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838186827] [2022-03-18 20:26:21,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 20:26:21,259 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 20:26:21,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:26:21,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 20:26:21,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-03-18 20:26:21,260 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 20:26:21,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:26:21,354 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2022-03-18 20:26:21,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 20:26:21,356 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2022-03-18 20:26:21,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:26:21,360 INFO L225 Difference]: With dead ends: 33 [2022-03-18 20:26:21,360 INFO L226 Difference]: Without dead ends: 33 [2022-03-18 20:26:21,366 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-03-18 20:26:21,367 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 18 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 20:26:21,368 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 95 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 20:26:21,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-18 20:26:21,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2022-03-18 20:26:21,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 20 states have internal predecessors, (21), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-18 20:26:21,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-03-18 20:26:21,378 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 22 [2022-03-18 20:26:21,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:26:21,378 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-03-18 20:26:21,378 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 20:26:21,378 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-03-18 20:26:21,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-18 20:26:21,379 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:26:21,380 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:26:21,402 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 20:26:21,597 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:26:21,598 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:26:21,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:26:21,599 INFO L85 PathProgramCache]: Analyzing trace with hash -127181274, now seen corresponding path program 1 times [2022-03-18 20:26:21,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:26:21,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521290122] [2022-03-18 20:26:21,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:26:21,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:26:21,621 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:26:21,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [170861143] [2022-03-18 20:26:21,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:26:21,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:26:21,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:26:21,628 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 20:26:21,633 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 20:26:21,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 20:26:21,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-18 20:26:21,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:26:21,820 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 20:26:21,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 20:26:21,980 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 20:26:21,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:26:21,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521290122] [2022-03-18 20:26:21,983 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:26:21,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170861143] [2022-03-18 20:26:21,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170861143] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 20:26:21,983 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 20:26:21,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-03-18 20:26:21,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680114447] [2022-03-18 20:26:21,984 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 20:26:21,984 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 20:26:21,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:26:21,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 20:26:21,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-03-18 20:26:21,985 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-18 20:26:22,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:26:22,040 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2022-03-18 20:26:22,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 20:26:22,041 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 28 [2022-03-18 20:26:22,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:26:22,042 INFO L225 Difference]: With dead ends: 28 [2022-03-18 20:26:22,042 INFO L226 Difference]: Without dead ends: 0 [2022-03-18 20:26:22,043 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-03-18 20:26:22,045 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 11 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 20:26:22,046 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 126 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 20:26:22,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-18 20:26:22,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-18 20:26:22,047 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 20:26:22,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-18 20:26:22,047 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2022-03-18 20:26:22,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:26:22,047 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-18 20:26:22,048 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-18 20:26:22,048 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-18 20:26:22,048 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-18 20:26:22,050 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-18 20:26:22,069 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 20:26:22,268 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,SelfDestructingSolverStorable2 [2022-03-18 20:26:22,271 INFO L718 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-03-18 20:26:22,272 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-18 20:26:22,274 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 08:26:22 BasicIcfg [2022-03-18 20:26:22,274 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-18 20:26:22,275 INFO L158 Benchmark]: Toolchain (without parser) took 2173.32ms. Allocated memory was 196.1MB in the beginning and 265.3MB in the end (delta: 69.2MB). Free memory was 147.2MB in the beginning and 207.3MB in the end (delta: -60.0MB). Peak memory consumption was 9.1MB. Max. memory is 8.0GB. [2022-03-18 20:26:22,275 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 196.1MB. Free memory was 163.5MB in the beginning and 163.4MB in the end (delta: 73.1kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-18 20:26:22,275 INFO L158 Benchmark]: CACSL2BoogieTranslator took 207.71ms. Allocated memory is still 196.1MB. Free memory was 147.0MB in the beginning and 172.4MB in the end (delta: -25.4MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-18 20:26:22,275 INFO L158 Benchmark]: Boogie Preprocessor took 33.96ms. Allocated memory is still 196.1MB. Free memory was 172.4MB in the beginning and 170.9MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-18 20:26:22,276 INFO L158 Benchmark]: RCFGBuilder took 228.89ms. Allocated memory is still 196.1MB. Free memory was 170.9MB in the beginning and 160.9MB in the end (delta: 10.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-18 20:26:22,276 INFO L158 Benchmark]: IcfgTransformer took 16.51ms. Allocated memory is still 196.1MB. Free memory was 160.9MB in the beginning and 159.9MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-18 20:26:22,276 INFO L158 Benchmark]: TraceAbstraction took 1680.14ms. Allocated memory was 196.1MB in the beginning and 265.3MB in the end (delta: 69.2MB). Free memory was 159.4MB in the beginning and 207.3MB in the end (delta: -47.9MB). Peak memory consumption was 22.4MB. Max. memory is 8.0GB. [2022-03-18 20:26:22,277 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 196.1MB. Free memory was 163.5MB in the beginning and 163.4MB in the end (delta: 73.1kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 207.71ms. Allocated memory is still 196.1MB. Free memory was 147.0MB in the beginning and 172.4MB in the end (delta: -25.4MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 33.96ms. Allocated memory is still 196.1MB. Free memory was 172.4MB in the beginning and 170.9MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 8.0GB. * RCFGBuilder took 228.89ms. Allocated memory is still 196.1MB. Free memory was 170.9MB in the beginning and 160.9MB in the end (delta: 10.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * IcfgTransformer took 16.51ms. Allocated memory is still 196.1MB. Free memory was 160.9MB in the beginning and 159.9MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 1680.14ms. Allocated memory was 196.1MB in the beginning and 265.3MB in the end (delta: 69.2MB). Free memory was 159.4MB in the beginning and 207.3MB in the end (delta: -47.9MB). Peak memory consumption was 22.4MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 18]: 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 5 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.6s, OverallIterations: 3, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 52 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 46 mSDsluCounter, 252 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 188 mSDsCounter, 14 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 115 IncrementalHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 14 mSolverCounterUnsat, 64 mSDtfsCounter, 115 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 88 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=2, InterpolantAutomatonStates: 17, 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, 3 MinimizatonAttempts, 3 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 72 NumberOfCodeBlocks, 72 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 96 ConstructedInterpolants, 0 QuantifiedInterpolants, 202 SizeOfPredicates, 10 NumberOfNonLiveVariables, 173 ConjunctsInSsa, 24 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 18/20 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 20:26:22,315 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...