/usr/bin/java -ea -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/geo1-u_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-fb4f59a-m [2022-04-27 13:21:04,471 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-27 13:21:04,472 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-27 13:21:04,498 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-27 13:21:04,498 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-27 13:21:04,499 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-27 13:21:04,500 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-27 13:21:04,501 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-27 13:21:04,502 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-27 13:21:04,507 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-27 13:21:04,508 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-27 13:21:04,509 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-27 13:21:04,510 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-27 13:21:04,513 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-27 13:21:04,514 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-27 13:21:04,515 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-27 13:21:04,516 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-27 13:21:04,517 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-27 13:21:04,521 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-27 13:21:04,522 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-27 13:21:04,523 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-27 13:21:04,523 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-27 13:21:04,524 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-27 13:21:04,524 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-27 13:21:04,525 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-27 13:21:04,526 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-27 13:21:04,531 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-27 13:21:04,531 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-27 13:21:04,532 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-27 13:21:04,533 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-04-27 13:21:04,554 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-27 13:21:04,554 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-27 13:21:04,554 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-04-27 13:21:04,554 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-04-27 13:21:04,555 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-27 13:21:04,555 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-27 13:21:04,555 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-27 13:21:04,555 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-27 13:21:04,555 INFO L138 SettingsManager]: * Use SBE=true [2022-04-27 13:21:04,556 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-27 13:21:04,556 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-27 13:21:04,556 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-27 13:21:04,556 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-27 13:21:04,556 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-27 13:21:04,556 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-27 13:21:04,556 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-27 13:21:04,556 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-27 13:21:04,557 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-27 13:21:04,557 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-27 13:21:04,557 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-27 13:21:04,558 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-27 13:21:04,558 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-27 13:21:04,558 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-27 13:21:04,558 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-27 13:21:04,558 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-27 13:21:04,558 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-27 13:21:04,558 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-27 13:21:04,558 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-27 13:21:04,558 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-27 13:21:04,558 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-27 13:21:04,559 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-04-27 13:21:04,559 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-04-27 13:21:04,559 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-27 13:21:04,559 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-27 13:21:04,699 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-27 13:21:04,716 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-27 13:21:04,718 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-27 13:21:04,719 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-27 13:21:04,720 INFO L275 PluginConnector]: CDTParser initialized [2022-04-27 13:21:04,720 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/geo1-u_unwindbound5.c [2022-04-27 13:21:04,768 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a138a125/da7f1e81a1ee47a5b23dbb9b59c9f3f0/FLAG650eac076 [2022-04-27 13:21:05,105 INFO L306 CDTParser]: Found 1 translation units. [2022-04-27 13:21:05,106 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo1-u_unwindbound5.c [2022-04-27 13:21:05,109 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a138a125/da7f1e81a1ee47a5b23dbb9b59c9f3f0/FLAG650eac076 [2022-04-27 13:21:05,118 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a138a125/da7f1e81a1ee47a5b23dbb9b59c9f3f0 [2022-04-27 13:21:05,119 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-27 13:21:05,120 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-27 13:21:05,124 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-27 13:21:05,125 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-27 13:21:05,127 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-27 13:21:05,127 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.04 01:21:05" (1/1) ... [2022-04-27 13:21:05,128 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7398e067 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.04 01:21:05, skipping insertion in model container [2022-04-27 13:21:05,128 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.04 01:21:05" (1/1) ... [2022-04-27 13:21:05,132 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-27 13:21:05,141 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-27 13:21:05,251 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/geo1-u_unwindbound5.c[555,568] [2022-04-27 13:21:05,263 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-27 13:21:05,279 INFO L203 MainTranslator]: Completed pre-run [2022-04-27 13:21:05,287 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/geo1-u_unwindbound5.c[555,568] [2022-04-27 13:21:05,291 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-27 13:21:05,299 INFO L208 MainTranslator]: Completed translation [2022-04-27 13:21:05,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.04 01:21:05 WrapperNode [2022-04-27 13:21:05,299 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-27 13:21:05,300 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-27 13:21:05,300 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-27 13:21:05,300 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-27 13:21:05,307 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.04 01:21:05" (1/1) ... [2022-04-27 13:21:05,307 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.04 01:21:05" (1/1) ... [2022-04-27 13:21:05,311 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.04 01:21:05" (1/1) ... [2022-04-27 13:21:05,311 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.04 01:21:05" (1/1) ... [2022-04-27 13:21:05,318 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.04 01:21:05" (1/1) ... [2022-04-27 13:21:05,320 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.04 01:21:05" (1/1) ... [2022-04-27 13:21:05,321 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.04 01:21:05" (1/1) ... [2022-04-27 13:21:05,322 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-27 13:21:05,322 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-27 13:21:05,322 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-27 13:21:05,322 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-27 13:21:05,323 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.04 01:21:05" (1/1) ... [2022-04-27 13:21:05,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-27 13:21:05,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-27 13:21:05,345 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-27 13:21:05,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-27 13:21:05,381 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-27 13:21:05,381 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-27 13:21:05,381 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-27 13:21:05,381 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-27 13:21:05,382 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-27 13:21:05,382 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-27 13:21:05,382 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-27 13:21:05,382 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-27 13:21:05,382 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-27 13:21:05,382 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-27 13:21:05,382 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-04-27 13:21:05,382 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-27 13:21:05,382 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-27 13:21:05,382 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-27 13:21:05,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-27 13:21:05,382 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-27 13:21:05,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-27 13:21:05,382 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-27 13:21:05,383 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-27 13:21:05,383 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-27 13:21:05,422 INFO L234 CfgBuilder]: Building ICFG [2022-04-27 13:21:05,423 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-27 13:21:05,555 INFO L275 CfgBuilder]: Performing block encoding [2022-04-27 13:21:05,559 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-27 13:21:05,559 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-27 13:21:05,560 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.04 01:21:05 BoogieIcfgContainer [2022-04-27 13:21:05,560 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-27 13:21:05,562 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-27 13:21:05,562 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-27 13:21:05,576 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-27 13:21:05,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.04 01:21:05" (1/3) ... [2022-04-27 13:21:05,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17042eae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.04 01:21:05, skipping insertion in model container [2022-04-27 13:21:05,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.04 01:21:05" (2/3) ... [2022-04-27 13:21:05,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17042eae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.04 01:21:05, skipping insertion in model container [2022-04-27 13:21:05,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.04 01:21:05" (3/3) ... [2022-04-27 13:21:05,583 INFO L111 eAbstractionObserver]: Analyzing ICFG geo1-u_unwindbound5.c [2022-04-27 13:21:05,592 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-27 13:21:05,592 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-27 13:21:05,620 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-27 13:21:05,624 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5aaccdc7, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@705b2c2e [2022-04-27 13:21:05,625 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-27 13:21:05,635 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-27 13:21:05,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-27 13:21:05,640 INFO L187 NwaCegarLoop]: Found error trace [2022-04-27 13:21:05,640 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-27 13:21:05,641 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-27 13:21:05,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-27 13:21:05,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1864317590, now seen corresponding path program 1 times [2022-04-27 13:21:05,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-27 13:21:05,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717933015] [2022-04-27 13:21:05,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-27 13:21:05,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-27 13:21:05,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-27 13:21:05,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-27 13:21:05,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-27 13:21:05,771 INFO L290 TraceCheckUtils]: 0: Hoare triple {31#(and (= ~counter~0 |old(~counter~0)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|))} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(9, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {26#true} is VALID [2022-04-27 13:21:05,772 INFO L290 TraceCheckUtils]: 1: Hoare triple {26#true} assume true; {26#true} is VALID [2022-04-27 13:21:05,772 INFO L284 TraceCheckUtils]: 2: Hoare quadruple {26#true} {26#true} #55#return; {26#true} is VALID [2022-04-27 13:21:05,773 INFO L272 TraceCheckUtils]: 0: Hoare triple {26#true} call ULTIMATE.init(); {31#(and (= ~counter~0 |old(~counter~0)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|))} is VALID [2022-04-27 13:21:05,773 INFO L290 TraceCheckUtils]: 1: Hoare triple {31#(and (= ~counter~0 |old(~counter~0)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|))} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(9, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {26#true} is VALID [2022-04-27 13:21:05,774 INFO L290 TraceCheckUtils]: 2: Hoare triple {26#true} assume true; {26#true} is VALID [2022-04-27 13:21:05,774 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {26#true} {26#true} #55#return; {26#true} is VALID [2022-04-27 13:21:05,774 INFO L272 TraceCheckUtils]: 4: Hoare triple {26#true} call #t~ret7 := main(); {26#true} is VALID [2022-04-27 13:21:05,774 INFO L290 TraceCheckUtils]: 5: Hoare triple {26#true} havoc ~z~0;havoc ~k~0;havoc ~x~0;havoc ~y~0;havoc ~c~0;~z~0 := #t~nondet4;havoc #t~nondet4;~k~0 := #t~nondet5;havoc #t~nondet5;~x~0 := 1;~y~0 := ~z~0 % 4294967296;~c~0 := 1; {26#true} is VALID [2022-04-27 13:21:05,775 INFO L290 TraceCheckUtils]: 6: Hoare triple {26#true} assume !true; {27#false} is VALID [2022-04-27 13:21:05,775 INFO L290 TraceCheckUtils]: 7: Hoare triple {27#false} ~x~0 := ~x~0 * ((~z~0 - 1) % 4294967296); {27#false} is VALID [2022-04-27 13:21:05,775 INFO L272 TraceCheckUtils]: 8: Hoare triple {27#false} call __VERIFIER_assert((if 0 == 1 + ~x~0 - ~y~0 then 1 else 0)); {27#false} is VALID [2022-04-27 13:21:05,775 INFO L290 TraceCheckUtils]: 9: Hoare triple {27#false} ~cond := #in~cond; {27#false} is VALID [2022-04-27 13:21:05,775 INFO L290 TraceCheckUtils]: 10: Hoare triple {27#false} assume 0 == ~cond; {27#false} is VALID [2022-04-27 13:21:05,776 INFO L290 TraceCheckUtils]: 11: Hoare triple {27#false} assume !false; {27#false} is VALID [2022-04-27 13:21:05,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-27 13:21:05,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-27 13:21:05,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717933015] [2022-04-27 13:21:05,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717933015] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-27 13:21:05,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-27 13:21:05,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-27 13:21:05,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626752228] [2022-04-27 13:21:05,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-27 13:21:05,782 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-04-27 13:21:05,783 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-27 13:21:05,785 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-27 13:21:05,808 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 12 edges. 12 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-27 13:21:05,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-27 13:21:05,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-27 13:21:05,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-27 13:21:05,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-27 13:21:05,823 INFO L87 Difference]: Start difference. First operand has 23 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-27 13:21:05,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-27 13:21:05,928 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2022-04-27 13:21:05,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-27 13:21:05,928 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-04-27 13:21:05,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-27 13:21:05,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-27 13:21:05,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 52 transitions. [2022-04-27 13:21:05,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-27 13:21:05,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 52 transitions. [2022-04-27 13:21:05,936 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 3 states and 52 transitions. [2022-04-27 13:21:05,982 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 52 edges. 52 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-27 13:21:05,993 INFO L225 Difference]: With dead ends: 41 [2022-04-27 13:21:05,994 INFO L226 Difference]: Without dead ends: 19 [2022-04-27 13:21:05,996 INFO L412 NwaCegarLoop]: 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 [2022-04-27 13:21:05,998 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-27 13:21:05,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 28 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-27 13:21:06,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-04-27 13:21:06,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2022-04-27 13:21:06,018 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-27 13:21:06,018 INFO L82 GeneralOperation]: Start isEquivalent. First operand 19 states. Second operand has 18 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-27 13:21:06,019 INFO L74 IsIncluded]: Start isIncluded. First operand 19 states. Second operand has 18 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-27 13:21:06,019 INFO L87 Difference]: Start difference. First operand 19 states. Second operand has 18 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-27 13:21:06,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-27 13:21:06,021 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2022-04-27 13:21:06,021 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-04-27 13:21:06,022 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-27 13:21:06,022 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-27 13:21:06,022 INFO L74 IsIncluded]: Start isIncluded. First operand has 18 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand 19 states. [2022-04-27 13:21:06,022 INFO L87 Difference]: Start difference. First operand has 18 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand 19 states. [2022-04-27 13:21:06,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-27 13:21:06,024 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2022-04-27 13:21:06,024 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-04-27 13:21:06,024 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-27 13:21:06,024 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-27 13:21:06,025 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-27 13:21:06,025 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-27 13:21:06,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-27 13:21:06,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2022-04-27 13:21:06,027 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 12 [2022-04-27 13:21:06,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-27 13:21:06,027 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2022-04-27 13:21:06,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-27 13:21:06,028 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2022-04-27 13:21:06,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-27 13:21:06,028 INFO L187 NwaCegarLoop]: Found error trace [2022-04-27 13:21:06,028 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-27 13:21:06,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-27 13:21:06,029 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-27 13:21:06,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-27 13:21:06,030 INFO L85 PathProgramCache]: Analyzing trace with hash 2049175951, now seen corresponding path program 1 times [2022-04-27 13:21:06,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-27 13:21:06,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693270373] [2022-04-27 13:21:06,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-27 13:21:06,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-27 13:21:06,042 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-27 13:21:06,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [206073621] [2022-04-27 13:21:06,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-27 13:21:06,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-27 13:21:06,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-27 13:21:06,044 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) [2022-04-27 13:21:06,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-27 13:21:06,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-27 13:21:06,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-27 13:21:06,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-27 13:21:06,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-27 13:21:06,263 INFO L272 TraceCheckUtils]: 0: Hoare triple {152#true} call ULTIMATE.init(); {152#true} is VALID [2022-04-27 13:21:06,263 INFO L290 TraceCheckUtils]: 1: Hoare triple {152#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(9, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {152#true} is VALID [2022-04-27 13:21:06,264 INFO L290 TraceCheckUtils]: 2: Hoare triple {152#true} assume true; {152#true} is VALID [2022-04-27 13:21:06,264 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {152#true} {152#true} #55#return; {152#true} is VALID [2022-04-27 13:21:06,264 INFO L272 TraceCheckUtils]: 4: Hoare triple {152#true} call #t~ret7 := main(); {152#true} is VALID [2022-04-27 13:21:06,265 INFO L290 TraceCheckUtils]: 5: Hoare triple {152#true} havoc ~z~0;havoc ~k~0;havoc ~x~0;havoc ~y~0;havoc ~c~0;~z~0 := #t~nondet4;havoc #t~nondet4;~k~0 := #t~nondet5;havoc #t~nondet5;~x~0 := 1;~y~0 := ~z~0 % 4294967296;~c~0 := 1; {172#(and (= (mod main_~z~0 4294967296) main_~y~0) (= main_~x~0 1))} is VALID [2022-04-27 13:21:06,265 INFO L290 TraceCheckUtils]: 6: Hoare triple {172#(and (= (mod main_~z~0 4294967296) main_~y~0) (= main_~x~0 1))} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {172#(and (= (mod main_~z~0 4294967296) main_~y~0) (= main_~x~0 1))} is VALID [2022-04-27 13:21:06,267 INFO L290 TraceCheckUtils]: 7: Hoare triple {172#(and (= (mod main_~z~0 4294967296) main_~y~0) (= main_~x~0 1))} assume !!(#t~post6 < 5);havoc #t~post6; {172#(and (= (mod main_~z~0 4294967296) main_~y~0) (= main_~x~0 1))} is VALID [2022-04-27 13:21:06,269 INFO L272 TraceCheckUtils]: 8: Hoare triple {172#(and (= (mod main_~z~0 4294967296) main_~y~0) (= main_~x~0 1))} call __VERIFIER_assert((if 0 == 1 + (~x~0 * (~z~0 % 4294967296) - ~x~0 - ~y~0) then 1 else 0)); {182#(<= 1 |__VERIFIER_assert_#in~cond|)} is VALID [2022-04-27 13:21:06,270 INFO L290 TraceCheckUtils]: 9: Hoare triple {182#(<= 1 |__VERIFIER_assert_#in~cond|)} ~cond := #in~cond; {186#(<= 1 __VERIFIER_assert_~cond)} is VALID [2022-04-27 13:21:06,271 INFO L290 TraceCheckUtils]: 10: Hoare triple {186#(<= 1 __VERIFIER_assert_~cond)} assume 0 == ~cond; {153#false} is VALID [2022-04-27 13:21:06,271 INFO L290 TraceCheckUtils]: 11: Hoare triple {153#false} assume !false; {153#false} is VALID [2022-04-27 13:21:06,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-27 13:21:06,271 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-27 13:21:06,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-27 13:21:06,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693270373] [2022-04-27 13:21:06,272 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-27 13:21:06,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206073621] [2022-04-27 13:21:06,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206073621] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-27 13:21:06,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-27 13:21:06,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-27 13:21:06,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179303862] [2022-04-27 13:21:06,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-27 13:21:06,277 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 12 [2022-04-27 13:21:06,277 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-27 13:21:06,278 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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) [2022-04-27 13:21:06,288 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 12 edges. 12 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-27 13:21:06,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-27 13:21:06,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-27 13:21:06,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-27 13:21:06,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-27 13:21:06,290 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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) [2022-04-27 13:21:06,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-27 13:21:06,384 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2022-04-27 13:21:06,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-27 13:21:06,384 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 12 [2022-04-27 13:21:06,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-27 13:21:06,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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) [2022-04-27 13:21:06,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 33 transitions. [2022-04-27 13:21:06,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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) [2022-04-27 13:21:06,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 33 transitions. [2022-04-27 13:21:06,392 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 5 states and 33 transitions. [2022-04-27 13:21:06,415 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 33 edges. 33 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-27 13:21:06,418 INFO L225 Difference]: With dead ends: 29 [2022-04-27 13:21:06,418 INFO L226 Difference]: Without dead ends: 27 [2022-04-27 13:21:06,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-27 13:21:06,420 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 7 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-27 13:21:06,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 58 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-27 13:21:06,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-04-27 13:21:06,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2022-04-27 13:21:06,429 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-27 13:21:06,430 INFO L82 GeneralOperation]: Start isEquivalent. First operand 27 states. Second operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 18 states have internal predecessors, (20), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-27 13:21:06,432 INFO L74 IsIncluded]: Start isIncluded. First operand 27 states. Second operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 18 states have internal predecessors, (20), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-27 13:21:06,432 INFO L87 Difference]: Start difference. First operand 27 states. Second operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 18 states have internal predecessors, (20), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-27 13:21:06,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-27 13:21:06,434 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2022-04-27 13:21:06,434 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-04-27 13:21:06,435 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-27 13:21:06,435 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-27 13:21:06,435 INFO L74 IsIncluded]: Start isIncluded. First operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 18 states have internal predecessors, (20), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Second operand 27 states. [2022-04-27 13:21:06,435 INFO L87 Difference]: Start difference. First operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 18 states have internal predecessors, (20), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Second operand 27 states. [2022-04-27 13:21:06,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-27 13:21:06,438 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2022-04-27 13:21:06,438 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-04-27 13:21:06,438 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-27 13:21:06,439 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-27 13:21:06,439 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-27 13:21:06,439 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-27 13:21:06,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 18 states have internal predecessors, (20), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-27 13:21:06,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-04-27 13:21:06,444 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 12 [2022-04-27 13:21:06,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-27 13:21:06,444 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-04-27 13:21:06,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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) [2022-04-27 13:21:06,445 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-04-27 13:21:06,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-04-27 13:21:06,446 INFO L187 NwaCegarLoop]: Found error trace [2022-04-27 13:21:06,446 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-27 13:21:06,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-27 13:21:06,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-27 13:21:06,676 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-27 13:21:06,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-27 13:21:06,676 INFO L85 PathProgramCache]: Analyzing trace with hash -975399299, now seen corresponding path program 1 times [2022-04-27 13:21:06,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-27 13:21:06,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124904956] [2022-04-27 13:21:06,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-27 13:21:06,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-27 13:21:06,690 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-27 13:21:06,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1603052639] [2022-04-27 13:21:06,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-27 13:21:06,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-27 13:21:06,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-27 13:21:06,691 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) [2022-04-27 13:21:06,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-27 13:21:06,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-27 13:21:06,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-27 13:21:06,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-27 13:21:06,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-27 13:21:06,837 INFO L272 TraceCheckUtils]: 0: Hoare triple {324#true} call ULTIMATE.init(); {324#true} is VALID [2022-04-27 13:21:06,838 INFO L290 TraceCheckUtils]: 1: Hoare triple {324#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(9, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {332#(<= ~counter~0 0)} is VALID [2022-04-27 13:21:06,838 INFO L290 TraceCheckUtils]: 2: Hoare triple {332#(<= ~counter~0 0)} assume true; {332#(<= ~counter~0 0)} is VALID [2022-04-27 13:21:06,839 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {332#(<= ~counter~0 0)} {324#true} #55#return; {332#(<= ~counter~0 0)} is VALID [2022-04-27 13:21:06,839 INFO L272 TraceCheckUtils]: 4: Hoare triple {332#(<= ~counter~0 0)} call #t~ret7 := main(); {332#(<= ~counter~0 0)} is VALID [2022-04-27 13:21:06,840 INFO L290 TraceCheckUtils]: 5: Hoare triple {332#(<= ~counter~0 0)} havoc ~z~0;havoc ~k~0;havoc ~x~0;havoc ~y~0;havoc ~c~0;~z~0 := #t~nondet4;havoc #t~nondet4;~k~0 := #t~nondet5;havoc #t~nondet5;~x~0 := 1;~y~0 := ~z~0 % 4294967296;~c~0 := 1; {332#(<= ~counter~0 0)} is VALID [2022-04-27 13:21:06,841 INFO L290 TraceCheckUtils]: 6: Hoare triple {332#(<= ~counter~0 0)} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {348#(<= |main_#t~post6| 0)} is VALID [2022-04-27 13:21:06,841 INFO L290 TraceCheckUtils]: 7: Hoare triple {348#(<= |main_#t~post6| 0)} assume !(#t~post6 < 5);havoc #t~post6; {325#false} is VALID [2022-04-27 13:21:06,843 INFO L290 TraceCheckUtils]: 8: Hoare triple {325#false} ~x~0 := ~x~0 * ((~z~0 - 1) % 4294967296); {325#false} is VALID [2022-04-27 13:21:06,844 INFO L272 TraceCheckUtils]: 9: Hoare triple {325#false} call __VERIFIER_assert((if 0 == 1 + ~x~0 - ~y~0 then 1 else 0)); {325#false} is VALID [2022-04-27 13:21:06,847 INFO L290 TraceCheckUtils]: 10: Hoare triple {325#false} ~cond := #in~cond; {325#false} is VALID [2022-04-27 13:21:06,848 INFO L290 TraceCheckUtils]: 11: Hoare triple {325#false} assume 0 == ~cond; {325#false} is VALID [2022-04-27 13:21:06,848 INFO L290 TraceCheckUtils]: 12: Hoare triple {325#false} assume !false; {325#false} is VALID [2022-04-27 13:21:06,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-27 13:21:06,849 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-27 13:21:06,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-27 13:21:06,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124904956] [2022-04-27 13:21:06,851 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-27 13:21:06,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603052639] [2022-04-27 13:21:06,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603052639] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-27 13:21:06,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-27 13:21:06,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-27 13:21:06,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794382141] [2022-04-27 13:21:06,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-27 13:21:06,852 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-04-27 13:21:06,852 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-27 13:21:06,853 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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) [2022-04-27 13:21:06,862 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 13 edges. 13 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-27 13:21:06,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-27 13:21:06,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-27 13:21:06,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-27 13:21:06,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-27 13:21:06,865 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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) [2022-04-27 13:21:06,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-27 13:21:06,903 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2022-04-27 13:21:06,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-27 13:21:06,904 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-04-27 13:21:06,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-27 13:21:06,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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) [2022-04-27 13:21:06,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 30 transitions. [2022-04-27 13:21:06,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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) [2022-04-27 13:21:06,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 30 transitions. [2022-04-27 13:21:06,919 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 4 states and 30 transitions. [2022-04-27 13:21:06,939 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 30 edges. 30 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-27 13:21:06,940 INFO L225 Difference]: With dead ends: 33 [2022-04-27 13:21:06,940 INFO L226 Difference]: Without dead ends: 25 [2022-04-27 13:21:06,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-27 13:21:06,943 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-27 13:21:06,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-27 13:21:06,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-04-27 13:21:06,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-04-27 13:21:06,953 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-27 13:21:06,953 INFO L82 GeneralOperation]: Start isEquivalent. First operand 25 states. Second operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-27 13:21:06,953 INFO L74 IsIncluded]: Start isIncluded. First operand 25 states. Second operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-27 13:21:06,954 INFO L87 Difference]: Start difference. First operand 25 states. Second operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-27 13:21:06,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-27 13:21:06,956 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2022-04-27 13:21:06,956 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-04-27 13:21:06,956 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-27 13:21:06,956 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-27 13:21:06,957 INFO L74 IsIncluded]: Start isIncluded. First operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Second operand 25 states. [2022-04-27 13:21:06,957 INFO L87 Difference]: Start difference. First operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Second operand 25 states. [2022-04-27 13:21:06,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-27 13:21:06,960 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2022-04-27 13:21:06,961 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-04-27 13:21:06,962 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-27 13:21:06,962 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-27 13:21:06,962 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-27 13:21:06,962 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-27 13:21:06,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-27 13:21:06,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2022-04-27 13:21:06,965 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 13 [2022-04-27 13:21:06,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-27 13:21:06,965 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2022-04-27 13:21:06,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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) [2022-04-27 13:21:06,965 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-04-27 13:21:06,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-04-27 13:21:06,969 INFO L187 NwaCegarLoop]: Found error trace [2022-04-27 13:21:06,969 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-27 13:21:06,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-27 13:21:07,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-04-27 13:21:07,184 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-27 13:21:07,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-27 13:21:07,184 INFO L85 PathProgramCache]: Analyzing trace with hash 198190047, now seen corresponding path program 1 times [2022-04-27 13:21:07,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-27 13:21:07,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582386389] [2022-04-27 13:21:07,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-27 13:21:07,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-27 13:21:07,225 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-27 13:21:07,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1912574473] [2022-04-27 13:21:07,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-27 13:21:07,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-27 13:21:07,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-27 13:21:07,232 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) [2022-04-27 13:21:07,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-27 13:21:07,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-27 13:21:07,262 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-27 13:21:07,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-27 13:21:07,280 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-27 13:21:07,281 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-04-27 13:21:07,281 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-27 13:21:07,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-27 13:21:07,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-27 13:21:07,502 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-04-27 13:21:07,504 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-04-27 13:21:07,525 WARN L170 areAnnotationChecker]: reach_errorENTRY has no Hoare annotation [2022-04-27 13:21:07,526 WARN L170 areAnnotationChecker]: ULTIMATE.initENTRY has no Hoare annotation [2022-04-27 13:21:07,526 WARN L170 areAnnotationChecker]: ULTIMATE.startENTRY has no Hoare annotation [2022-04-27 13:21:07,526 WARN L170 areAnnotationChecker]: ULTIMATE.startENTRY has no Hoare annotation [2022-04-27 13:21:07,526 WARN L170 areAnnotationChecker]: assume_abort_if_notENTRY has no Hoare annotation [2022-04-27 13:21:07,526 WARN L170 areAnnotationChecker]: mainENTRY has no Hoare annotation [2022-04-27 13:21:07,526 WARN L170 areAnnotationChecker]: __VERIFIER_assertENTRY has no Hoare annotation [2022-04-27 13:21:07,526 WARN L170 areAnnotationChecker]: reach_errorFINAL has no Hoare annotation [2022-04-27 13:21:07,526 WARN L170 areAnnotationChecker]: ULTIMATE.initFINAL has no Hoare annotation [2022-04-27 13:21:07,526 WARN L170 areAnnotationChecker]: L-1 has no Hoare annotation [2022-04-27 13:21:07,526 WARN L170 areAnnotationChecker]: L-1 has no Hoare annotation [2022-04-27 13:21:07,526 WARN L170 areAnnotationChecker]: L13 has no Hoare annotation [2022-04-27 13:21:07,526 WARN L170 areAnnotationChecker]: L13 has no Hoare annotation [2022-04-27 13:21:07,526 WARN L170 areAnnotationChecker]: L33-3 has no Hoare annotation [2022-04-27 13:21:07,526 WARN L170 areAnnotationChecker]: L33-3 has no Hoare annotation [2022-04-27 13:21:07,526 WARN L170 areAnnotationChecker]: L16 has no Hoare annotation [2022-04-27 13:21:07,527 WARN L170 areAnnotationChecker]: L16 has no Hoare annotation [2022-04-27 13:21:07,527 WARN L170 areAnnotationChecker]: ULTIMATE.initEXIT has no Hoare annotation [2022-04-27 13:21:07,527 WARN L170 areAnnotationChecker]: ULTIMATE.startFINAL has no Hoare annotation [2022-04-27 13:21:07,527 WARN L170 areAnnotationChecker]: L13-2 has no Hoare annotation [2022-04-27 13:21:07,527 WARN L170 areAnnotationChecker]: L33-4 has no Hoare annotation [2022-04-27 13:21:07,527 WARN L170 areAnnotationChecker]: L33-1 has no Hoare annotation [2022-04-27 13:21:07,527 WARN L170 areAnnotationChecker]: L33-1 has no Hoare annotation [2022-04-27 13:21:07,527 WARN L170 areAnnotationChecker]: L17 has no Hoare annotation [2022-04-27 13:21:07,527 WARN L170 areAnnotationChecker]: L17 has no Hoare annotation [2022-04-27 13:21:07,527 WARN L170 areAnnotationChecker]: L16-2 has no Hoare annotation [2022-04-27 13:21:07,527 WARN L170 areAnnotationChecker]: L47 has no Hoare annotation [2022-04-27 13:21:07,527 WARN L170 areAnnotationChecker]: L47 has no Hoare annotation [2022-04-27 13:21:07,527 WARN L170 areAnnotationChecker]: L34 has no Hoare annotation [2022-04-27 13:21:07,527 WARN L170 areAnnotationChecker]: L34 has no Hoare annotation [2022-04-27 13:21:07,527 WARN L170 areAnnotationChecker]: __VERIFIER_assertEXIT has no Hoare annotation [2022-04-27 13:21:07,527 WARN L170 areAnnotationChecker]: __VERIFIER_assertEXIT has no Hoare annotation [2022-04-27 13:21:07,527 WARN L170 areAnnotationChecker]: L47-1 has no Hoare annotation [2022-04-27 13:21:07,527 WARN L170 areAnnotationChecker]: L34-1 has no Hoare annotation [2022-04-27 13:21:07,528 WARN L170 areAnnotationChecker]: L34-1 has no Hoare annotation [2022-04-27 13:21:07,528 WARN L170 areAnnotationChecker]: mainFINAL has no Hoare annotation [2022-04-27 13:21:07,528 WARN L170 areAnnotationChecker]: mainEXIT has no Hoare annotation [2022-04-27 13:21:07,528 INFO L163 areAnnotationChecker]: CFG has 0 edges. 0 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. 0 times interpolants missing. [2022-04-27 13:21:07,528 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.04 01:21:07 BoogieIcfgContainer [2022-04-27 13:21:07,528 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-27 13:21:07,529 INFO L158 Benchmark]: Toolchain (without parser) took 2408.78ms. Allocated memory was 194.0MB in the beginning and 255.9MB in the end (delta: 61.9MB). Free memory was 142.9MB in the beginning and 202.5MB in the end (delta: -59.5MB). Peak memory consumption was 3.9MB. Max. memory is 8.0GB. [2022-04-27 13:21:07,529 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 194.0MB. Free memory is still 159.7MB. There was no memory consumed. Max. memory is 8.0GB. [2022-04-27 13:21:07,529 INFO L158 Benchmark]: CACSL2BoogieTranslator took 174.61ms. Allocated memory is still 194.0MB. Free memory was 142.7MB in the beginning and 168.2MB in the end (delta: -25.5MB). Peak memory consumption was 11.9MB. Max. memory is 8.0GB. [2022-04-27 13:21:07,530 INFO L158 Benchmark]: Boogie Preprocessor took 22.17ms. Allocated memory is still 194.0MB. Free memory was 168.2MB in the beginning and 166.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-04-27 13:21:07,530 INFO L158 Benchmark]: RCFGBuilder took 238.30ms. Allocated memory is still 194.0MB. Free memory was 166.7MB in the beginning and 156.2MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-04-27 13:21:07,530 INFO L158 Benchmark]: TraceAbstraction took 1966.70ms. Allocated memory was 194.0MB in the beginning and 255.9MB in the end (delta: 61.9MB). Free memory was 155.7MB in the beginning and 202.5MB in the end (delta: -46.8MB). Peak memory consumption was 16.1MB. Max. memory is 8.0GB. [2022-04-27 13:21:07,531 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - AssertionsEnabledResult: Assertions are enabled Assertions are enabled - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 194.0MB. Free memory is still 159.7MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 174.61ms. Allocated memory is still 194.0MB. Free memory was 142.7MB in the beginning and 168.2MB in the end (delta: -25.5MB). Peak memory consumption was 11.9MB. Max. memory is 8.0GB. * Boogie Preprocessor took 22.17ms. Allocated memory is still 194.0MB. Free memory was 168.2MB in the beginning and 166.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 238.30ms. Allocated memory is still 194.0MB. Free memory was 166.7MB in the beginning and 156.2MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 1966.70ms. Allocated memory was 194.0MB in the beginning and 255.9MB in the end (delta: 61.9MB). Free memory was 155.7MB in the beginning and 202.5MB in the end (delta: -46.8MB). Peak memory consumption was 16.1MB. 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 - CounterExampleResult [Line: 18]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; VAL [\old(counter)=4, counter=0] [L24] unsigned int z, k; [L25] long long x, y, c; [L26] z = __VERIFIER_nondet_uint() [L27] k = __VERIFIER_nondet_uint() [L29] x = 1 [L30] y = z [L31] c = 1 VAL [\old(counter)=0, c=1, counter=0, k=0, x=1, y=0, z=0] [L33] EXPR counter++ VAL [\old(counter)=0, c=1, counter=1, counter++=0, k=0, x=1, y=0, z=0] [L33] COND TRUE counter++<5 [L34] CALL __VERIFIER_assert(x*z - x - y + 1 == 0) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L34] RET __VERIFIER_assert(x*z - x - y + 1 == 0) VAL [\old(counter)=0, c=1, counter=1, k=0, x=1, y=0, z=0] [L36] COND TRUE !(c < k) VAL [\old(counter)=0, c=1, counter=1, k=0, x=1, y=0, z=0] [L45] x = x * (z - 1) VAL [\old(counter)=0, c=1, counter=1, k=0, x=4294967295, y=0, z=0] [L47] CALL __VERIFIER_assert(1 + x - y == 0) VAL [\old(cond)=0, \old(counter)=0, counter=1] [L16] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=1] [L18] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.9s, OverallIterations: 4, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 14 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 13 mSDsluCounter, 134 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 76 mSDsCounter, 3 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 43 IncrementalHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3 mSolverCounterUnsat, 58 mSDtfsCounter, 43 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=2, InterpolantAutomatonStates: 12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 3 MinimizatonAttempts, 3 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 56 NumberOfCodeBlocks, 56 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 34 ConstructedInterpolants, 0 QuantifiedInterpolants, 83 SizeOfPredicates, 2 NumberOfNonLiveVariables, 144 ConjunctsInSsa, 12 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 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 RESULT: Ultimate proved your program to be incorrect! [2022-04-27 13:21:07,554 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...