/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/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/float-benchs/zonotope_2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-02-01 00:16:21,030 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-01 00:16:21,032 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-01 00:16:21,089 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-01 00:16:21,129 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-01 00:16:21,129 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-01 00:16:21,130 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-01 00:16:21,138 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-02-01 00:16:21,149 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-01 00:16:21,149 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-01 00:16:21,150 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-01 00:16:21,150 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-01 00:16:21,150 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-01 00:16:21,151 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-01 00:16:21,151 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-01 00:16:21,151 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-01 00:16:21,151 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-01 00:16:21,151 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-01 00:16:21,151 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-01 00:16:21,151 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-01 00:16:21,151 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-01 00:16:21,151 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-01 00:16:21,151 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-01 00:16:21,151 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-01 00:16:21,152 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-01 00:16:21,152 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-01 00:16:21,152 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-01 00:16:21,152 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-02-01 00:16:21,152 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-01 00:16:21,328 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-01 00:16:21,348 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-01 00:16:21,350 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-01 00:16:21,351 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-01 00:16:21,352 INFO L275 PluginConnector]: CDTParser initialized [2022-02-01 00:16:21,353 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/zonotope_2.c [2022-02-01 00:16:21,404 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/876b6ca1d/dbc469a8a20b4a8d961c953b2dd474d3/FLAG3c6af93dd [2022-02-01 00:16:21,715 INFO L306 CDTParser]: Found 1 translation units. [2022-02-01 00:16:21,715 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/zonotope_2.c [2022-02-01 00:16:21,722 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/876b6ca1d/dbc469a8a20b4a8d961c953b2dd474d3/FLAG3c6af93dd [2022-02-01 00:16:22,146 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/876b6ca1d/dbc469a8a20b4a8d961c953b2dd474d3 [2022-02-01 00:16:22,148 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-01 00:16:22,149 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-01 00:16:22,150 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-01 00:16:22,150 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-01 00:16:22,153 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-01 00:16:22,153 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.02 12:16:22" (1/1) ... [2022-02-01 00:16:22,154 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@542a513b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:16:22, skipping insertion in model container [2022-02-01 00:16:22,154 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.02 12:16:22" (1/1) ... [2022-02-01 00:16:22,158 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-01 00:16:22,168 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-01 00:16:22,278 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/zonotope_2.c[473,486] [2022-02-01 00:16:22,295 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-01 00:16:22,312 INFO L203 MainTranslator]: Completed pre-run [2022-02-01 00:16:22,322 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/zonotope_2.c[473,486] [2022-02-01 00:16:22,324 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-01 00:16:22,333 INFO L208 MainTranslator]: Completed translation [2022-02-01 00:16:22,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:16:22 WrapperNode [2022-02-01 00:16:22,333 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-01 00:16:22,334 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-01 00:16:22,334 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-01 00:16:22,334 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-01 00:16:22,341 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:16:22" (1/1) ... [2022-02-01 00:16:22,341 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:16:22" (1/1) ... [2022-02-01 00:16:22,345 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:16:22" (1/1) ... [2022-02-01 00:16:22,346 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:16:22" (1/1) ... [2022-02-01 00:16:22,355 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:16:22" (1/1) ... [2022-02-01 00:16:22,358 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:16:22" (1/1) ... [2022-02-01 00:16:22,358 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:16:22" (1/1) ... [2022-02-01 00:16:22,360 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-01 00:16:22,361 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-01 00:16:22,361 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-01 00:16:22,362 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-01 00:16:22,363 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:16:22" (1/1) ... [2022-02-01 00:16:22,368 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-01 00:16:22,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-01 00:16:22,394 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) [2022-02-01 00:16:22,412 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 [2022-02-01 00:16:22,423 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-01 00:16:22,423 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-01 00:16:22,423 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-01 00:16:22,423 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-01 00:16:22,423 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-01 00:16:22,423 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-01 00:16:22,423 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-01 00:16:22,424 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-01 00:16:22,424 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-01 00:16:22,424 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-01 00:16:22,424 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-01 00:16:22,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-01 00:16:22,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-01 00:16:22,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-01 00:16:22,425 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-01 00:16:22,425 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-01 00:16:22,425 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-01 00:16:22,470 INFO L234 CfgBuilder]: Building ICFG [2022-02-01 00:16:22,473 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-01 00:16:22,592 INFO L275 CfgBuilder]: Performing block encoding [2022-02-01 00:16:22,596 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-01 00:16:22,596 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-01 00:16:22,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.02 12:16:22 BoogieIcfgContainer [2022-02-01 00:16:22,597 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-01 00:16:22,598 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-01 00:16:22,599 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-01 00:16:22,604 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-01 00:16:22,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.02 12:16:22" (1/3) ... [2022-02-01 00:16:22,604 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53e7036c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.02 12:16:22, skipping insertion in model container [2022-02-01 00:16:22,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:16:22" (2/3) ... [2022-02-01 00:16:22,605 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53e7036c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.02 12:16:22, skipping insertion in model container [2022-02-01 00:16:22,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.02 12:16:22" (3/3) ... [2022-02-01 00:16:22,606 INFO L111 eAbstractionObserver]: Analyzing ICFG zonotope_2.c [2022-02-01 00:16:22,609 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-01 00:16:22,609 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-01 00:16:22,635 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-01 00:16:22,640 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, 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, mLoopAccelerationTechnique=QVASR [2022-02-01 00:16:22,640 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-01 00:16:22,648 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-01 00:16:22,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-01 00:16:22,653 INFO L506 BasicCegarLoop]: Found error trace [2022-02-01 00:16:22,653 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-01 00:16:22,653 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-01 00:16:22,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-01 00:16:22,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1177678237, now seen corresponding path program 1 times [2022-02-01 00:16:22,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-01 00:16:22,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [106462132] [2022-02-01 00:16:22,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-01 00:16:22,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-01 00:16:22,722 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-01 00:16:22,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-01 00:16:22,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-01 00:16:22,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-01 00:16:22,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-01 00:16:22,830 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-01 00:16:22,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [106462132] [2022-02-01 00:16:22,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [106462132] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-01 00:16:22,833 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-01 00:16:22,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-01 00:16:22,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322216844] [2022-02-01 00:16:22,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-01 00:16:22,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-01 00:16:22,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-01 00:16:22,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-01 00:16:22,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-01 00:16:22,860 INFO L87 Difference]: Start difference. First operand has 22 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-02-01 00:16:22,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-01 00:16:22,907 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2022-02-01 00:16:22,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-01 00:16:22,909 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 11 [2022-02-01 00:16:22,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-01 00:16:22,913 INFO L225 Difference]: With dead ends: 38 [2022-02-01 00:16:22,913 INFO L226 Difference]: Without dead ends: 17 [2022-02-01 00:16:22,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-01 00:16:22,921 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 11 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-01 00:16:22,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 24 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-01 00:16:22,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-02-01 00:16:22,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-02-01 00:16:22,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 10 states have internal predecessors, (11), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-01 00:16:22,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-02-01 00:16:22,954 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2022-02-01 00:16:22,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-01 00:16:22,955 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-02-01 00:16:22,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-02-01 00:16:22,955 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-02-01 00:16:22,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-01 00:16:22,957 INFO L506 BasicCegarLoop]: Found error trace [2022-02-01 00:16:22,957 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-01 00:16:22,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-01 00:16:22,958 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-01 00:16:22,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-01 00:16:22,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1185066405, now seen corresponding path program 1 times [2022-02-01 00:16:22,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-01 00:16:22,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [43762484] [2022-02-01 00:16:22,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-01 00:16:22,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-01 00:16:22,964 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-01 00:16:22,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-01 00:16:23,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-01 00:16:23,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-01 00:16:23,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-01 00:16:23,034 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-01 00:16:23,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [43762484] [2022-02-01 00:16:23,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [43762484] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-01 00:16:23,034 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-01 00:16:23,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-01 00:16:23,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577026727] [2022-02-01 00:16:23,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-01 00:16:23,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-01 00:16:23,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-01 00:16:23,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-01 00:16:23,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-01 00:16:23,037 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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) [2022-02-01 00:16:23,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-01 00:16:23,087 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2022-02-01 00:16:23,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-01 00:16:23,087 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 11 [2022-02-01 00:16:23,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-01 00:16:23,089 INFO L225 Difference]: With dead ends: 28 [2022-02-01 00:16:23,089 INFO L226 Difference]: Without dead ends: 21 [2022-02-01 00:16:23,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-01 00:16:23,094 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 11 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-01 00:16:23,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 22 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-01 00:16:23,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-02-01 00:16:23,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2022-02-01 00:16:23,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 10 states have (on average 1.2) internal successors, (12), 11 states have internal predecessors, (12), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-01 00:16:23,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2022-02-01 00:16:23,104 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 11 [2022-02-01 00:16:23,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-01 00:16:23,104 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2022-02-01 00:16:23,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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) [2022-02-01 00:16:23,104 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2022-02-01 00:16:23,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-01 00:16:23,105 INFO L506 BasicCegarLoop]: Found error trace [2022-02-01 00:16:23,105 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-01 00:16:23,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-01 00:16:23,105 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-01 00:16:23,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-01 00:16:23,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1183338527, now seen corresponding path program 1 times [2022-02-01 00:16:23,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-01 00:16:23,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [979492675] [2022-02-01 00:16:23,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-01 00:16:23,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-01 00:16:23,112 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-01 00:16:23,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-01 00:16:23,132 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-02-01 00:16:23,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-01 00:16:23,149 INFO L133 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2022-02-01 00:16:23,149 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-02-01 00:16:23,150 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-01 00:16:23,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-01 00:16:23,154 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-02-01 00:16:23,155 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-01 00:16:23,171 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.02 12:16:23 BoogieIcfgContainer [2022-02-01 00:16:23,171 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-01 00:16:23,172 INFO L158 Benchmark]: Toolchain (without parser) took 1022.88ms. Allocated memory is still 213.9MB. Free memory was 165.2MB in the beginning and 145.6MB in the end (delta: 19.6MB). Peak memory consumption was 19.1MB. Max. memory is 8.0GB. [2022-02-01 00:16:23,172 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 213.9MB. Free memory is still 181.5MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-01 00:16:23,173 INFO L158 Benchmark]: CACSL2BoogieTranslator took 183.41ms. Allocated memory is still 213.9MB. Free memory was 165.0MB in the beginning and 191.7MB in the end (delta: -26.7MB). Peak memory consumption was 9.7MB. Max. memory is 8.0GB. [2022-02-01 00:16:23,173 INFO L158 Benchmark]: Boogie Preprocessor took 26.55ms. Allocated memory is still 213.9MB. Free memory was 191.7MB in the beginning and 190.7MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-01 00:16:23,177 INFO L158 Benchmark]: RCFGBuilder took 236.09ms. Allocated memory is still 213.9MB. Free memory was 190.1MB in the beginning and 180.2MB in the end (delta: 10.0MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-02-01 00:16:23,177 INFO L158 Benchmark]: TraceAbstraction took 572.84ms. Allocated memory is still 213.9MB. Free memory was 179.7MB in the beginning and 145.6MB in the end (delta: 34.1MB). Peak memory consumption was 33.6MB. Max. memory is 8.0GB. [2022-02-01 00:16:23,178 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 213.9MB. Free memory is still 181.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 183.41ms. Allocated memory is still 213.9MB. Free memory was 165.0MB in the beginning and 191.7MB in the end (delta: -26.7MB). Peak memory consumption was 9.7MB. Max. memory is 8.0GB. * Boogie Preprocessor took 26.55ms. Allocated memory is still 213.9MB. Free memory was 191.7MB in the beginning and 190.7MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 236.09ms. Allocated memory is still 213.9MB. Free memory was 190.1MB in the beginning and 180.2MB in the end (delta: 10.0MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 572.84ms. Allocated memory is still 213.9MB. Free memory was 179.7MB in the beginning and 145.6MB in the end (delta: 34.1MB). Peak memory consumption was 33.6MB. 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 - UnprovableResult [Line: 10]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 25, overapproximation of someBinaryArithmeticFLOAToperation at line 22. Possible FailurePath: [L14] float x = 12.f; [L15] float x1 = 12.f; [L16] float y = 16.f; [L17] float y1 = 16.f; [L18] int i; [L19] i = 0 [L19] COND TRUE i < 100000 [L20] x = x1 [L21] y = y1 [L22] x1 = 3.f * x / 4.f + y / 4.f [L23] y1 = x / 4.f + 3.f * y / 4.f [L25] CALL __VERIFIER_assert(x1 >= 0.f && x1 <= 100.f) [L10] COND TRUE !(cond) [L10] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.5s, OverallIterations: 3, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 27 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 22 mSDsluCounter, 46 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 10 mSDsCounter, 15 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 25 IncrementalHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 15 mSolverCounterUnsat, 36 mSDtfsCounter, 25 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=0, InterpolantAutomatonStates: 7, 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, 2 MinimizatonAttempts, 3 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, 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 could not prove your program: unable to determine feasibility of some traces [2022-02-01 00:16:23,213 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...