/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.p+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-18 12:19:56,353 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 12:19:56,354 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 12:19:56,400 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-18 12:19:56,416 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-18 12:19:56,418 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-18 12:19:56,419 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-18 12:19:56,421 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-18 12:19:56,422 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-18 12:19:56,423 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-18 12:19:56,425 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-18 12:19:56,430 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-18 12:19:56,432 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-18 12:19:56,433 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-18 12:19:56,434 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-18 12:19:56,434 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-18 12:19:56,436 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-18 12:19:56,442 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-18 12:19:56,453 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 [2022-03-18 12:19:56,481 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 12:19:56,481 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 12:19:56,481 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-18 12:19:56,481 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-18 12:19:56,483 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-18 12:19:56,483 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-18 12:19:56,484 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-18 12:19:56,484 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-18 12:19:56,484 INFO L138 SettingsManager]: * Use SBE=true [2022-03-18 12:19:56,485 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 12:19:56,485 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-18 12:19:56,485 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 12:19:56,485 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-18 12:19:56,485 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 12:19:56,486 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 12:19:56,486 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 12:19:56,486 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 12:19:56,486 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-18 12:19:56,486 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 12:19:56,486 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 12:19:56,486 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 12:19:56,486 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 12:19:56,487 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 12:19:56,487 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 12:19:56,487 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 12:19:56,487 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 12:19:56,487 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-18 12:19:56,487 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-18 12:19:56,487 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 12:19:56,487 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-18 12:19:56,488 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-18 12:19:56,488 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-18 12:19:56,488 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 12:19:56,488 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 12:19:56,709 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 12:19:56,739 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 12:19:56,741 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 12:19:56,742 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 12:19:56,742 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 12:19:56,744 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/gauss_sum.i.p+lhb-reducer.c [2022-03-18 12:19:56,818 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f52bdd73c/b26ca505ea3c42379f37b105def122a5/FLAG0211db544 [2022-03-18 12:19:57,212 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 12:19:57,213 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i.p+lhb-reducer.c [2022-03-18 12:19:57,219 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f52bdd73c/b26ca505ea3c42379f37b105def122a5/FLAG0211db544 [2022-03-18 12:19:57,229 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f52bdd73c/b26ca505ea3c42379f37b105def122a5 [2022-03-18 12:19:57,231 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 12:19:57,232 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-18 12:19:57,233 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 12:19:57,233 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 12:19:57,236 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 12:19:57,237 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 12:19:57" (1/1) ... [2022-03-18 12:19:57,238 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b606239 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:19:57, skipping insertion in model container [2022-03-18 12:19:57,238 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 12:19:57" (1/1) ... [2022-03-18 12:19:57,243 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 12:19:57,256 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 12:19:57,430 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.p+lhb-reducer.c[1444,1457] [2022-03-18 12:19:57,434 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 12:19:57,445 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 12:19:57,459 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.p+lhb-reducer.c[1444,1457] [2022-03-18 12:19:57,460 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 12:19:57,471 INFO L208 MainTranslator]: Completed translation [2022-03-18 12:19:57,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:19:57 WrapperNode [2022-03-18 12:19:57,471 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 12:19:57,472 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 12:19:57,472 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 12:19:57,472 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 12:19:57,482 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:19:57" (1/1) ... [2022-03-18 12:19:57,482 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:19:57" (1/1) ... [2022-03-18 12:19:57,487 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:19:57" (1/1) ... [2022-03-18 12:19:57,488 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:19:57" (1/1) ... [2022-03-18 12:19:57,492 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:19:57" (1/1) ... [2022-03-18 12:19:57,494 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:19:57" (1/1) ... [2022-03-18 12:19:57,495 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:19:57" (1/1) ... [2022-03-18 12:19:57,496 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 12:19:57,497 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 12:19:57,497 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 12:19:57,497 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 12:19:57,498 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:19:57" (1/1) ... [2022-03-18 12:19:57,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 12:19:57,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:19:57,532 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-18 12:19:57,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-18 12:19:57,562 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 12:19:57,563 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 12:19:57,563 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 12:19:57,563 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 12:19:57,563 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 12:19:57,563 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 12:19:57,565 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 12:19:57,565 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 12:19:57,565 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 12:19:57,565 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 12:19:57,565 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 12:19:57,565 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-18 12:19:57,566 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 12:19:57,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 12:19:57,566 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 12:19:57,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 12:19:57,566 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 12:19:57,566 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 12:19:57,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 12:19:57,620 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 12:19:57,622 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 12:19:57,757 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 12:19:57,762 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 12:19:57,762 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-18 12:19:57,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 12:19:57 BoogieIcfgContainer [2022-03-18 12:19:57,764 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 12:19:57,778 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 12:19:57,779 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 12:19:57,784 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 12:19:57,784 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 12:19:57" (1/3) ... [2022-03-18 12:19:57,785 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f156c27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 12:19:57, skipping insertion in model container [2022-03-18 12:19:57,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:19:57" (2/3) ... [2022-03-18 12:19:57,785 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f156c27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 12:19:57, skipping insertion in model container [2022-03-18 12:19:57,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 12:19:57" (3/3) ... [2022-03-18 12:19:57,787 INFO L111 eAbstractionObserver]: Analyzing ICFG gauss_sum.i.p+lhb-reducer.c [2022-03-18 12:19:57,791 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-18 12:19:57,791 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 12:19:57,832 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 12:19:57,838 INFO L340 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 [2022-03-18 12:19:57,839 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 12:19:57,851 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 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) [2022-03-18 12:19:57,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-18 12:19:57,854 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:19:57,855 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:19:57,856 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:19:57,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:19:57,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1579444895, now seen corresponding path program 1 times [2022-03-18 12:19:57,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:19:57,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683129183] [2022-03-18 12:19:57,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:19:57,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:19:57,961 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 12:19:57,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [769789519] [2022-03-18 12:19:57,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:19:57,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:19:57,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:19:57,964 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:19:58,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 12:19:58,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:19:58,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-18 12:19:58,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:19:58,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:19:58,453 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 12:19:58,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:19:58,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683129183] [2022-03-18 12:19:58,453 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 12:19:58,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769789519] [2022-03-18 12:19:58,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769789519] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 12:19:58,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 12:19:58,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-18 12:19:58,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346007380] [2022-03-18 12:19:58,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 12:19:58,461 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 12:19:58,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:19:58,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 12:19:58,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-03-18 12:19:58,490 INFO L87 Difference]: Start difference. First operand has 21 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 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 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) [2022-03-18 12:19:58,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:19:58,603 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2022-03-18 12:19:58,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 12:19:58,605 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 16 [2022-03-18 12:19:58,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:19:58,611 INFO L225 Difference]: With dead ends: 41 [2022-03-18 12:19:58,611 INFO L226 Difference]: Without dead ends: 18 [2022-03-18 12:19:58,614 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-03-18 12:19:58,616 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 15 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 12:19:58,617 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 194 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 12:19:58,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-03-18 12:19:58,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-03-18 12:19:58,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 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) [2022-03-18 12:19:58,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2022-03-18 12:19:58,640 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2022-03-18 12:19:58,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:19:58,640 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2022-03-18 12:19:58,641 INFO L479 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) [2022-03-18 12:19:58,641 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2022-03-18 12:19:58,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-18 12:19:58,641 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:19:58,642 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:19:58,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-18 12:19:58,855 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-03-18 12:19:58,856 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:19:58,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:19:58,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1718213942, now seen corresponding path program 1 times [2022-03-18 12:19:58,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:19:58,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501285885] [2022-03-18 12:19:58,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:19:58,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:19:58,875 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 12:19:58,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1540234105] [2022-03-18 12:19:58,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:19:58,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:19:58,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:19:58,885 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:19:58,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 12:19:58,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:19:58,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-18 12:19:58,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:19:59,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:19:59,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:20:10,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:20:10,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:20:10,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501285885] [2022-03-18 12:20:10,690 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 12:20:10,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540234105] [2022-03-18 12:20:10,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540234105] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:20:10,691 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 12:20:10,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 12 [2022-03-18 12:20:10,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431693459] [2022-03-18 12:20:10,691 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 12:20:10,692 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 12:20:10,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:20:10,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 12:20:10,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-03-18 12:20:10,693 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 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) [2022-03-18 12:20:10,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:20:10,828 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2022-03-18 12:20:10,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 12:20:10,829 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 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 17 [2022-03-18 12:20:10,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:20:10,830 INFO L225 Difference]: With dead ends: 22 [2022-03-18 12:20:10,830 INFO L226 Difference]: Without dead ends: 19 [2022-03-18 12:20:10,830 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 6 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-03-18 12:20:10,831 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 12:20:10,832 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 81 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 82 Invalid, 0 Unknown, 6 Unchecked, 0.0s Time] [2022-03-18 12:20:10,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-03-18 12:20:10,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-03-18 12:20:10,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 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) [2022-03-18 12:20:10,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2022-03-18 12:20:10,835 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2022-03-18 12:20:10,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:20:10,836 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2022-03-18 12:20:10,836 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 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) [2022-03-18 12:20:10,836 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2022-03-18 12:20:10,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-18 12:20:10,836 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:20:10,836 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:20:10,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 12:20:11,043 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-03-18 12:20:11,044 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:20:11,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:20:11,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1725087103, now seen corresponding path program 2 times [2022-03-18 12:20:11,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:20:11,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634838054] [2022-03-18 12:20:11,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:20:11,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:20:11,062 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 12:20:11,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1039618328] [2022-03-18 12:20:11,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 12:20:11,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:20:11,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:20:11,064 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:20:11,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 12:20:11,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 12:20:11,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:20:11,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-18 12:20:11,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:20:11,305 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:20:11,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:20:11,818 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 12:20:11,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:20:11,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634838054] [2022-03-18 12:20:11,819 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 12:20:11,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039618328] [2022-03-18 12:20:11,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039618328] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:20:11,819 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 12:20:11,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 13 [2022-03-18 12:20:11,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466329667] [2022-03-18 12:20:11,820 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 12:20:11,820 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 12:20:11,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:20:11,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 12:20:11,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-03-18 12:20:11,821 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 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) [2022-03-18 12:20:12,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:20:12,061 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2022-03-18 12:20:12,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 12:20:12,061 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 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 18 [2022-03-18 12:20:12,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:20:12,062 INFO L225 Difference]: With dead ends: 20 [2022-03-18 12:20:12,062 INFO L226 Difference]: Without dead ends: 0 [2022-03-18 12:20:12,062 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2022-03-18 12:20:12,063 INFO L912 BasicCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 12:20:12,064 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 73 Invalid, 0 Unknown, 3 Unchecked, 0.0s Time] [2022-03-18 12:20:12,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-18 12:20:12,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-18 12:20:12,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-18 12:20:12,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-18 12:20:12,065 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2022-03-18 12:20:12,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:20:12,065 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-18 12:20:12,065 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 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) [2022-03-18 12:20:12,065 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-18 12:20:12,066 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-18 12:20:12,068 INFO L788 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-18 12:20:12,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 12:20:12,275 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:20:12,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-18 12:20:12,351 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 4) no Hoare annotation was computed. [2022-03-18 12:20:12,351 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 4) no Hoare annotation was computed. [2022-03-18 12:20:12,351 INFO L882 garLoopResultBuilder]: For program point reach_errorFINAL(line 4) no Hoare annotation was computed. [2022-03-18 12:20:12,351 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notENTRY(lines 6 8) no Hoare annotation was computed. [2022-03-18 12:20:12,351 INFO L882 garLoopResultBuilder]: For program point L7(line 7) no Hoare annotation was computed. [2022-03-18 12:20:12,351 INFO L882 garLoopResultBuilder]: For program point L7-2(lines 6 8) no Hoare annotation was computed. [2022-03-18 12:20:12,351 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 6 8) no Hoare annotation was computed. [2022-03-18 12:20:12,352 INFO L882 garLoopResultBuilder]: For program point L33(lines 33 103) no Hoare annotation was computed. [2022-03-18 12:20:12,352 INFO L878 garLoopResultBuilder]: At program point L58(lines 50 79) 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))))) (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))) [2022-03-18 12:20:12,352 INFO L882 garLoopResultBuilder]: For program point L25(lines 25 104) no Hoare annotation was computed. [2022-03-18 12:20:12,352 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 13 106) no Hoare annotation was computed. [2022-03-18 12:20:12,352 INFO L882 garLoopResultBuilder]: For program point L19(lines 19 105) no Hoare annotation was computed. [2022-03-18 12:20:12,352 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 13 106) no Hoare annotation was computed. [2022-03-18 12:20:12,352 INFO L882 garLoopResultBuilder]: For program point L69(line 69) no Hoare annotation was computed. [2022-03-18 12:20:12,352 INFO L882 garLoopResultBuilder]: For program point L67(lines 67 76) no Hoare annotation was computed. [2022-03-18 12:20:12,352 INFO L882 garLoopResultBuilder]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 69) no Hoare annotation was computed. [2022-03-18 12:20:12,353 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 13 106) the Hoare annotation is: true [2022-03-18 12:20:12,353 INFO L882 garLoopResultBuilder]: For program point L49(lines 49 83) no Hoare annotation was computed. [2022-03-18 12:20:12,353 INFO L882 garLoopResultBuilder]: For program point L45(lines 45 88) no Hoare annotation was computed. [2022-03-18 12:20:12,353 INFO L882 garLoopResultBuilder]: For program point L41(lines 41 93) no Hoare annotation was computed. [2022-03-18 12:20:12,353 INFO L882 garLoopResultBuilder]: For program point L37(lines 37 98) no Hoare annotation was computed. [2022-03-18 12:20:12,353 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-03-18 12:20:12,353 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2022-03-18 12:20:12,353 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-03-18 12:20:12,353 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-03-18 12:20:12,353 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-18 12:20:12,353 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-18 12:20:12,353 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-03-18 12:20:12,356 INFO L718 BasicCegarLoop]: Path program histogram: [2, 1] [2022-03-18 12:20:12,357 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-18 12:20:12,364 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~main__n~0,QUANTIFIED] [2022-03-18 12:20:12,365 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~main__n~0,QUANTIFIED] [2022-03-18 12:20:12,365 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~main__n~0,QUANTIFIED] [2022-03-18 12:20:12,365 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~main__n~0,QUANTIFIED] [2022-03-18 12:20:12,365 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~main__n~0,QUANTIFIED] [2022-03-18 12:20:12,370 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~main__n~0,QUANTIFIED] [2022-03-18 12:20:12,370 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~main__n~0,QUANTIFIED] [2022-03-18 12:20:12,371 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~main__n~0,QUANTIFIED] [2022-03-18 12:20:12,371 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~main__n~0,QUANTIFIED] [2022-03-18 12:20:12,371 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~main__n~0,QUANTIFIED] [2022-03-18 12:20:12,376 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 12:20:12 BoogieIcfgContainer [2022-03-18 12:20:12,376 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-18 12:20:12,381 INFO L158 Benchmark]: Toolchain (without parser) took 15149.19ms. Allocated memory was 169.9MB in the beginning and 221.2MB in the end (delta: 51.4MB). Free memory was 116.9MB in the beginning and 93.0MB in the end (delta: 23.9MB). Peak memory consumption was 75.0MB. Max. memory is 8.0GB. [2022-03-18 12:20:12,382 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 169.9MB. Free memory was 133.0MB in the beginning and 132.9MB in the end (delta: 72.0kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-18 12:20:12,383 INFO L158 Benchmark]: CACSL2BoogieTranslator took 238.15ms. Allocated memory was 169.9MB in the beginning and 221.2MB in the end (delta: 51.4MB). Free memory was 116.7MB in the beginning and 197.6MB in the end (delta: -80.9MB). Peak memory consumption was 14.1MB. Max. memory is 8.0GB. [2022-03-18 12:20:12,383 INFO L158 Benchmark]: Boogie Preprocessor took 24.05ms. Allocated memory is still 221.2MB. Free memory was 197.6MB in the beginning and 195.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-18 12:20:12,384 INFO L158 Benchmark]: RCFGBuilder took 267.37ms. Allocated memory is still 221.2MB. Free memory was 195.9MB in the beginning and 185.5MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-18 12:20:12,385 INFO L158 Benchmark]: TraceAbstraction took 14602.52ms. Allocated memory is still 221.2MB. Free memory was 184.8MB in the beginning and 93.0MB in the end (delta: 91.8MB). Peak memory consumption was 92.3MB. Max. memory is 8.0GB. [2022-03-18 12:20:12,386 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 169.9MB. Free memory was 133.0MB in the beginning and 132.9MB in the end (delta: 72.0kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 238.15ms. Allocated memory was 169.9MB in the beginning and 221.2MB in the end (delta: 51.4MB). Free memory was 116.7MB in the beginning and 197.6MB in the end (delta: -80.9MB). Peak memory consumption was 14.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 24.05ms. Allocated memory is still 221.2MB. Free memory was 197.6MB in the beginning and 195.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 267.37ms. Allocated memory is still 221.2MB. Free memory was 195.9MB in the beginning and 185.5MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 14602.52ms. Allocated memory is still 221.2MB. Free memory was 184.8MB in the beginning and 93.0MB in the end (delta: 91.8MB). Peak memory consumption was 92.3MB. 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: 69]: 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, 28 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 14.5s, OverallIterations: 3, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 16 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 16 mSDsluCounter, 308 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 9 IncrementalHoareTripleChecker+Unchecked, 263 mSDsCounter, 10 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 263 IncrementalHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 10 mSolverCounterUnsat, 45 mSDtfsCounter, 263 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 98 GetRequests, 42 SyntacticMatches, 13 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 12.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=0, InterpolantAutomatonStates: 31, 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, 42 HoareAnnotationTreeSize, 5 FomulaSimplifications, 28 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 95 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 12.8s InterpolantComputationTime, 51 NumberOfCodeBlocks, 51 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 81 ConstructedInterpolants, 13 QuantifiedInterpolants, 618 SizeOfPredicates, 14 NumberOfNonLiveVariables, 303 ConjunctsInSsa, 96 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: 50]: Loop Invariant [2022-03-18 12:20:12,398 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~main__n~0,QUANTIFIED] [2022-03-18 12:20:12,399 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~main__n~0,QUANTIFIED] [2022-03-18 12:20:12,399 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~main__n~0,QUANTIFIED] [2022-03-18 12:20:12,399 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~main__n~0,QUANTIFIED] [2022-03-18 12:20:12,399 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~main__n~0,QUANTIFIED] [2022-03-18 12:20:12,399 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~main__n~0,QUANTIFIED] [2022-03-18 12:20:12,400 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~main__n~0,QUANTIFIED] [2022-03-18 12:20:12,400 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~main__n~0,QUANTIFIED] [2022-03-18 12:20:12,400 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~main__n~0,QUANTIFIED] [2022-03-18 12:20:12,400 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) && (main__sum * 2 == main__n * main__n + main__n || main__i <= main__n) RESULT: Ultimate proved your program to be correct! [2022-03-18 12:20:12,411 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...