/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-new/gauss_sum.i.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-23 11:09:18,981 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-23 11:09:18,991 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-23 11:09:19,036 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-23 11:09:19,097 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 [2022-02-23 11:09:19,128 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-23 11:09:19,128 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-23 11:09:19,129 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-23 11:09:19,129 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-23 11:09:19,129 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-23 11:09:19,129 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-23 11:09:19,130 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-23 11:09:19,130 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-23 11:09:19,130 INFO L138 SettingsManager]: * Use SBE=true [2022-02-23 11:09:19,130 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-23 11:09:19,130 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-23 11:09:19,131 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-23 11:09:19,131 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-23 11:09:19,131 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-23 11:09:19,133 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-23 11:09:19,133 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-23 11:09:19,133 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-23 11:09:19,134 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-23 11:09:19,134 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-23 11:09:19,134 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-23 11:09:19,134 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-23 11:09:19,134 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-23 11:09:19,134 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-23 11:09:19,135 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-23 11:09:19,136 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 11:09:19,136 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-23 11:09:19,136 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-23 11:09:19,136 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-23 11:09:19,137 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-23 11:09:19,137 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-23 11:09:19,137 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-23 11:09:19,137 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-02-23 11:09:19,137 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-23 11:09:19,137 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-23 11:09:19,374 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-23 11:09:19,391 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-23 11:09:19,393 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-23 11:09:19,394 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-23 11:09:19,395 INFO L275 PluginConnector]: CDTParser initialized [2022-02-23 11:09:19,396 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/gauss_sum.i.v+cfa-reducer.c [2022-02-23 11:09:19,458 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c4c7754b/d3b95817a1f145fe8dc4b9f4eeb14f3f/FLAGa6238a090 [2022-02-23 11:09:19,852 INFO L306 CDTParser]: Found 1 translation units. [2022-02-23 11:09:19,853 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i.v+cfa-reducer.c [2022-02-23 11:09:19,868 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c4c7754b/d3b95817a1f145fe8dc4b9f4eeb14f3f/FLAGa6238a090 [2022-02-23 11:09:20,263 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c4c7754b/d3b95817a1f145fe8dc4b9f4eeb14f3f [2022-02-23 11:09:20,266 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-23 11:09:20,267 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-23 11:09:20,271 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-23 11:09:20,272 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-23 11:09:20,274 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-23 11:09:20,275 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 11:09:20" (1/1) ... [2022-02-23 11:09:20,276 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43251f1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:09:20, skipping insertion in model container [2022-02-23 11:09:20,277 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 11:09:20" (1/1) ... [2022-02-23 11:09:20,282 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-23 11:09:20,296 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-23 11:09:20,469 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i.v+cfa-reducer.c[1014,1027] [2022-02-23 11:09:20,473 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 11:09:20,480 INFO L203 MainTranslator]: Completed pre-run [2022-02-23 11:09:20,500 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i.v+cfa-reducer.c[1014,1027] [2022-02-23 11:09:20,502 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 11:09:20,514 INFO L208 MainTranslator]: Completed translation [2022-02-23 11:09:20,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:09:20 WrapperNode [2022-02-23 11:09:20,515 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-23 11:09:20,516 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-23 11:09:20,516 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-23 11:09:20,516 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-23 11:09:20,525 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:09:20" (1/1) ... [2022-02-23 11:09:20,525 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:09:20" (1/1) ... [2022-02-23 11:09:20,531 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:09:20" (1/1) ... [2022-02-23 11:09:20,531 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:09:20" (1/1) ... [2022-02-23 11:09:20,544 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:09:20" (1/1) ... [2022-02-23 11:09:20,548 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:09:20" (1/1) ... [2022-02-23 11:09:20,549 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:09:20" (1/1) ... [2022-02-23 11:09:20,554 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-23 11:09:20,554 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-23 11:09:20,554 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-23 11:09:20,555 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-23 11:09:20,557 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:09:20" (1/1) ... [2022-02-23 11:09:20,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 11:09:20,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 11:09:20,584 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) [2022-02-23 11:09:20,611 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 [2022-02-23 11:09:20,625 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-23 11:09:20,626 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-23 11:09:20,626 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-23 11:09:20,626 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-23 11:09:20,627 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-23 11:09:20,629 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-23 11:09:20,629 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-23 11:09:20,629 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-23 11:09:20,629 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-23 11:09:20,629 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-23 11:09:20,629 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-23 11:09:20,629 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-23 11:09:20,629 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-23 11:09:20,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-23 11:09:20,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-23 11:09:20,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-23 11:09:20,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-23 11:09:20,630 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-23 11:09:20,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-23 11:09:20,691 INFO L234 CfgBuilder]: Building ICFG [2022-02-23 11:09:20,692 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-23 11:09:20,805 INFO L275 CfgBuilder]: Performing block encoding [2022-02-23 11:09:20,809 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-23 11:09:20,810 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-02-23 11:09:20,811 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 11:09:20 BoogieIcfgContainer [2022-02-23 11:09:20,811 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-23 11:09:20,814 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-23 11:09:20,814 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-23 11:09:20,817 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-23 11:09:20,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 11:09:20" (1/3) ... [2022-02-23 11:09:20,818 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2be1cdcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 11:09:20, skipping insertion in model container [2022-02-23 11:09:20,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:09:20" (2/3) ... [2022-02-23 11:09:20,819 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2be1cdcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 11:09:20, skipping insertion in model container [2022-02-23 11:09:20,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 11:09:20" (3/3) ... [2022-02-23 11:09:20,821 INFO L111 eAbstractionObserver]: Analyzing ICFG gauss_sum.i.v+cfa-reducer.c [2022-02-23 11:09:20,825 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-23 11:09:20,825 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-23 11:09:20,867 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-23 11:09:20,875 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2022-02-23 11:09:20,875 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-23 11:09:20,889 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-23 11:09:20,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-23 11:09:20,903 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 11:09:20,906 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 11:09:20,906 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 11:09:20,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 11:09:20,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1088558671, now seen corresponding path program 1 times [2022-02-23 11:09:20,917 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 11:09:20,918 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932613253] [2022-02-23 11:09:20,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 11:09:20,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 11:09:21,016 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 11:09:21,017 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1328440262] [2022-02-23 11:09:21,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 11:09:21,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 11:09:21,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 11:09:21,019 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) [2022-02-23 11:09:21,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-23 11:09:21,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 11:09:21,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 3 conjunts are in the unsatisfiable core [2022-02-23 11:09:21,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 11:09:21,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 11:09:21,254 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 11:09:21,255 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 11:09:21,255 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932613253] [2022-02-23 11:09:21,256 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 11:09:21,256 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328440262] [2022-02-23 11:09:21,257 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328440262] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 11:09:21,257 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 11:09:21,257 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 11:09:21,259 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470173325] [2022-02-23 11:09:21,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 11:09:21,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 11:09:21,264 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 11:09:21,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 11:09:21,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-23 11:09:21,292 INFO L87 Difference]: Start difference. First operand has 16 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 11:09:21,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 11:09:21,327 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2022-02-23 11:09:21,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 11:09:21,330 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-02-23 11:09:21,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 11:09:21,339 INFO L225 Difference]: With dead ends: 26 [2022-02-23 11:09:21,339 INFO L226 Difference]: Without dead ends: 13 [2022-02-23 11:09:21,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-23 11:09:21,345 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 8 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 11:09:21,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 29 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 11:09:21,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-02-23 11:09:21,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-02-23 11:09:21,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 11:09:21,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2022-02-23 11:09:21,375 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2022-02-23 11:09:21,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 11:09:21,375 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2022-02-23 11:09:21,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 11:09:21,377 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2022-02-23 11:09:21,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-23 11:09:21,377 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 11:09:21,378 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 11:09:21,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-23 11:09:21,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-02-23 11:09:21,602 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 11:09:21,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 11:09:21,603 INFO L85 PathProgramCache]: Analyzing trace with hash 614357099, now seen corresponding path program 1 times [2022-02-23 11:09:21,603 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 11:09:21,603 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025468287] [2022-02-23 11:09:21,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 11:09:21,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 11:09:21,620 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 11:09:21,621 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1412884840] [2022-02-23 11:09:21,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 11:09:21,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 11:09:21,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 11:09:21,623 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) [2022-02-23 11:09:21,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-23 11:09:21,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 11:09:21,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-23 11:09:21,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 11:09:21,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 11:09:21,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 11:09:22,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 11:09:22,040 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 11:09:22,041 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025468287] [2022-02-23 11:09:22,041 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 11:09:22,041 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412884840] [2022-02-23 11:09:22,041 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412884840] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 11:09:22,041 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 11:09:22,041 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2022-02-23 11:09:22,042 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837271221] [2022-02-23 11:09:22,042 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 11:09:22,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-23 11:09:22,043 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 11:09:22,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-23 11:09:22,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-02-23 11:09:22,044 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 11:09:22,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 11:09:22,079 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2022-02-23 11:09:22,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-23 11:09:22,079 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-02-23 11:09:22,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 11:09:22,080 INFO L225 Difference]: With dead ends: 17 [2022-02-23 11:09:22,080 INFO L226 Difference]: Without dead ends: 14 [2022-02-23 11:09:22,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-02-23 11:09:22,082 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 12 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 11:09:22,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 38 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 11:09:22,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-02-23 11:09:22,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-02-23 11:09:22,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 11:09:22,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2022-02-23 11:09:22,086 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2022-02-23 11:09:22,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 11:09:22,086 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2022-02-23 11:09:22,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 11:09:22,087 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2022-02-23 11:09:22,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-23 11:09:22,087 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 11:09:22,087 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 11:09:22,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-23 11:09:22,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-02-23 11:09:22,310 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 11:09:22,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 11:09:22,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1865138417, now seen corresponding path program 2 times [2022-02-23 11:09:22,311 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 11:09:22,312 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663543150] [2022-02-23 11:09:22,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 11:09:22,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 11:09:22,323 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 11:09:22,323 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [411808568] [2022-02-23 11:09:22,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 11:09:22,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 11:09:22,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 11:09:22,332 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) [2022-02-23 11:09:22,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-23 11:09:22,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 11:09:22,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 11:09:22,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-23 11:09:22,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 11:09:22,502 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 11:09:22,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 11:09:32,590 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-23 11:09:32,590 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 11:09:32,590 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663543150] [2022-02-23 11:09:32,591 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 11:09:32,591 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411808568] [2022-02-23 11:09:32,591 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411808568] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 11:09:32,591 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 11:09:32,591 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2022-02-23 11:09:32,591 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650950985] [2022-02-23 11:09:32,591 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 11:09:32,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-23 11:09:32,592 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 11:09:32,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-23 11:09:32,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-02-23 11:09:32,593 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 11:09:32,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 11:09:32,690 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2022-02-23 11:09:32,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-23 11:09:32,690 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-02-23 11:09:32,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 11:09:32,691 INFO L225 Difference]: With dead ends: 15 [2022-02-23 11:09:32,691 INFO L226 Difference]: Without dead ends: 0 [2022-02-23 11:09:32,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-02-23 11:09:32,692 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 11:09:32,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 3 Unchecked, 0.0s Time] [2022-02-23 11:09:32,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-02-23 11:09:32,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-02-23 11:09:32,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-23 11:09:32,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-02-23 11:09:32,694 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 13 [2022-02-23 11:09:32,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 11:09:32,694 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-02-23 11:09:32,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 11:09:32,695 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-02-23 11:09:32,695 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-23 11:09:32,697 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-23 11:09:32,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-23 11:09:32,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 11:09:32,909 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-02-23 11:09:33,044 INFO L858 garLoopResultBuilder]: For program point reach_errorEXIT(line 4) no Hoare annotation was computed. [2022-02-23 11:09:33,045 INFO L858 garLoopResultBuilder]: For program point reach_errorENTRY(line 4) no Hoare annotation was computed. [2022-02-23 11:09:33,045 INFO L858 garLoopResultBuilder]: For program point reach_errorFINAL(line 4) no Hoare annotation was computed. [2022-02-23 11:09:33,045 INFO L858 garLoopResultBuilder]: For program point assume_abort_if_notENTRY(lines 6 8) no Hoare annotation was computed. [2022-02-23 11:09:33,045 INFO L858 garLoopResultBuilder]: For program point L7(line 7) no Hoare annotation was computed. [2022-02-23 11:09:33,045 INFO L858 garLoopResultBuilder]: For program point L7-2(lines 6 8) no Hoare annotation was computed. [2022-02-23 11:09:33,045 INFO L858 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 6 8) no Hoare annotation was computed. [2022-02-23 11:09:33,045 INFO L858 garLoopResultBuilder]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 49) no Hoare annotation was computed. [2022-02-23 11:09:33,046 INFO L861 garLoopResultBuilder]: At program point mainENTRY(lines 13 61) the Hoare annotation is: true [2022-02-23 11:09:33,046 INFO L858 garLoopResultBuilder]: For program point L25(lines 25 59) no Hoare annotation was computed. [2022-02-23 11:09:33,046 INFO L858 garLoopResultBuilder]: For program point mainEXIT(lines 13 61) no Hoare annotation was computed. [2022-02-23 11:09:33,046 INFO L858 garLoopResultBuilder]: For program point L19(lines 19 60) no Hoare annotation was computed. [2022-02-23 11:09:33,046 INFO L858 garLoopResultBuilder]: For program point L49(line 49) no Hoare annotation was computed. [2022-02-23 11:09:33,046 INFO L858 garLoopResultBuilder]: For program point L47(lines 47 56) no Hoare annotation was computed. [2022-02-23 11:09:33,046 INFO L858 garLoopResultBuilder]: For program point mainFINAL(lines 13 61) no Hoare annotation was computed. [2022-02-23 11:09:33,046 INFO L854 garLoopResultBuilder]: At program point L38(lines 30 59) the Hoare annotation is: (and (forall ((main_~main__n~0 Int)) (or (<= (+ main_~main__i~0 1) main_~main__n~0) (not (<= main_~main__i~0 main_~main__n~0)) (= (+ (* main_~main__n~0 main_~main__n~0) main_~main__n~0) (+ (* main_~main__sum~0 2) (* 2 main_~main__i~0))))) (<= 1 main_~main__n~0) (or (= (* main_~main__sum~0 2) (+ (* main_~main__n~0 main_~main__n~0) main_~main__n~0)) (<= main_~main__i~0 main_~main__n~0))) [2022-02-23 11:09:33,047 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-02-23 11:09:33,047 INFO L861 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2022-02-23 11:09:33,047 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-02-23 11:09:33,047 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-02-23 11:09:33,047 INFO L861 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-02-23 11:09:33,047 INFO L861 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-02-23 11:09:33,047 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-02-23 11:09:33,051 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1] [2022-02-23 11:09:33,053 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-23 11:09:33,060 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~main__n~0,QUANTIFIED] [2022-02-23 11:09:33,060 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~main__n~0,QUANTIFIED] [2022-02-23 11:09:33,060 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~main__n~0,QUANTIFIED] [2022-02-23 11:09:33,060 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~main__n~0,QUANTIFIED] [2022-02-23 11:09:33,061 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~main__n~0,QUANTIFIED] [2022-02-23 11:09:33,068 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~main__n~0,QUANTIFIED] [2022-02-23 11:09:33,069 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~main__n~0,QUANTIFIED] [2022-02-23 11:09:33,069 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~main__n~0,QUANTIFIED] [2022-02-23 11:09:33,069 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~main__n~0,QUANTIFIED] [2022-02-23 11:09:33,069 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~main__n~0,QUANTIFIED] [2022-02-23 11:09:33,071 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 11:09:33 BoogieIcfgContainer [2022-02-23 11:09:33,071 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-23 11:09:33,072 INFO L158 Benchmark]: Toolchain (without parser) took 12804.04ms. Allocated memory was 188.7MB in the beginning and 226.5MB in the end (delta: 37.7MB). Free memory was 138.2MB in the beginning and 157.8MB in the end (delta: -19.6MB). Peak memory consumption was 18.9MB. Max. memory is 8.0GB. [2022-02-23 11:09:33,072 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 188.7MB. Free memory is still 154.7MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-23 11:09:33,073 INFO L158 Benchmark]: CACSL2BoogieTranslator took 243.93ms. Allocated memory is still 188.7MB. Free memory was 138.1MB in the beginning and 163.7MB in the end (delta: -25.6MB). Peak memory consumption was 13.4MB. Max. memory is 8.0GB. [2022-02-23 11:09:33,074 INFO L158 Benchmark]: Boogie Preprocessor took 37.83ms. Allocated memory is still 188.7MB. Free memory was 163.7MB in the beginning and 162.6MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-23 11:09:33,076 INFO L158 Benchmark]: RCFGBuilder took 256.86ms. Allocated memory is still 188.7MB. Free memory was 162.6MB in the beginning and 152.9MB in the end (delta: 9.7MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-02-23 11:09:33,077 INFO L158 Benchmark]: TraceAbstraction took 12257.15ms. Allocated memory was 188.7MB in the beginning and 226.5MB in the end (delta: 37.7MB). Free memory was 152.5MB in the beginning and 157.8MB in the end (delta: -5.3MB). Peak memory consumption was 32.8MB. Max. memory is 8.0GB. [2022-02-23 11:09:33,077 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 188.7MB. Free memory is still 154.7MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 243.93ms. Allocated memory is still 188.7MB. Free memory was 138.1MB in the beginning and 163.7MB in the end (delta: -25.6MB). Peak memory consumption was 13.4MB. Max. memory is 8.0GB. * Boogie Preprocessor took 37.83ms. Allocated memory is still 188.7MB. Free memory was 163.7MB in the beginning and 162.6MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 256.86ms. Allocated memory is still 188.7MB. Free memory was 162.6MB in the beginning and 152.9MB in the end (delta: 9.7MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 12257.15ms. Allocated memory was 188.7MB in the beginning and 226.5MB in the end (delta: 37.7MB). Free memory was 152.5MB in the beginning and 157.8MB in the end (delta: -5.3MB). Peak memory consumption was 32.8MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~main__n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~main__n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~main__n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~main__n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~main__n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~main__n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~main__n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~main__n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~main__n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~main__n~0,QUANTIFIED] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 49]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 12.2s, OverallIterations: 3, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 20 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 20 mSDsluCounter, 106 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 3 IncrementalHoareTripleChecker+Unchecked, 73 mSDsCounter, 6 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 47 IncrementalHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 6 mSolverCounterUnsat, 33 mSDtfsCounter, 47 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 62 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 10.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=16occurred in iteration=0, InterpolantAutomatonStates: 17, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 5 PreInvPairs, 8 NumberOfFragments, 45 HoareAnnotationTreeSize, 5 FomulaSimplifications, 11 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 67 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 10.7s InterpolantComputationTime, 36 NumberOfCodeBlocks, 36 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 56 ConstructedInterpolants, 2 QuantifiedInterpolants, 215 SizeOfPredicates, 12 NumberOfNonLiveVariables, 228 ConjunctsInSsa, 31 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 1/8 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 30]: Loop Invariant [2022-02-23 11:09:33,084 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~main__n~0,QUANTIFIED] [2022-02-23 11:09:33,084 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~main__n~0,QUANTIFIED] [2022-02-23 11:09:33,084 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~main__n~0,QUANTIFIED] [2022-02-23 11:09:33,084 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~main__n~0,QUANTIFIED] [2022-02-23 11:09:33,084 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~main__n~0,QUANTIFIED] [2022-02-23 11:09:33,085 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~main__n~0,QUANTIFIED] [2022-02-23 11:09:33,085 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~main__n~0,QUANTIFIED] [2022-02-23 11:09:33,085 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~main__n~0,QUANTIFIED] [2022-02-23 11:09:33,085 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~main__n~0,QUANTIFIED] [2022-02-23 11:09:33,085 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~main__n~0,QUANTIFIED] Derived loop invariant: ((forall main_~main__n~0 : int :: (main__i + 1 <= main_~main__n~0 || !(main__i <= main_~main__n~0)) || main_~main__n~0 * main_~main__n~0 + main_~main__n~0 == main__sum * 2 + 2 * main__i) && 1 <= main__n) && (main__sum * 2 == main__n * main__n + main__n || main__i <= main__n) RESULT: Ultimate proved your program to be correct! [2022-02-23 11:09:33,093 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...