/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/half.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-05 23:53:51,905 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-05 23:53:51,920 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-05 23:53:51,961 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-05 23:53:52,006 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-04-05 23:53:52,027 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-05 23:53:52,028 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-05 23:53:52,028 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-04-05 23:53:52,028 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-04-05 23:53:52,029 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-05 23:53:52,029 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-05 23:53:52,029 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-05 23:53:52,030 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-05 23:53:52,030 INFO L138 SettingsManager]: * Use SBE=true [2022-04-05 23:53:52,030 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-05 23:53:52,030 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-05 23:53:52,030 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-05 23:53:52,030 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-05 23:53:52,030 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-05 23:53:52,030 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-05 23:53:52,031 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-05 23:53:52,031 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-05 23:53:52,031 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-05 23:53:52,031 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-05 23:53:52,031 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-05 23:53:52,031 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-05 23:53:52,031 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-05 23:53:52,032 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-05 23:53:52,032 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-05 23:53:52,032 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 23:53:52,032 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-05 23:53:52,032 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-05 23:53:52,032 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-05 23:53:52,032 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-05 23:53:52,032 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-05 23:53:52,033 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-04-05 23:53:52,033 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-04-05 23:53:52,033 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-05 23:53:52,033 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-05 23:53:52,285 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-05 23:53:52,305 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-05 23:53:52,307 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-05 23:53:52,307 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-05 23:53:52,308 INFO L275 PluginConnector]: CDTParser initialized [2022-04-05 23:53:52,309 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/half.i [2022-04-05 23:53:52,366 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e27f9c19b/b15a60d0820b4c7db32fa3c9ea98ecfe/FLAGcea8c2444 [2022-04-05 23:53:52,797 INFO L306 CDTParser]: Found 1 translation units. [2022-04-05 23:53:52,798 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/half.i [2022-04-05 23:53:52,805 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e27f9c19b/b15a60d0820b4c7db32fa3c9ea98ecfe/FLAGcea8c2444 [2022-04-05 23:53:52,818 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e27f9c19b/b15a60d0820b4c7db32fa3c9ea98ecfe [2022-04-05 23:53:52,821 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-05 23:53:52,823 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-05 23:53:52,827 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-05 23:53:52,827 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-05 23:53:52,830 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-05 23:53:52,830 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 11:53:52" (1/1) ... [2022-04-05 23:53:52,832 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3dd74c5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 11:53:52, skipping insertion in model container [2022-04-05 23:53:52,832 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 11:53:52" (1/1) ... [2022-04-05 23:53:52,838 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-05 23:53:52,857 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-05 23:53:53,019 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/half.i[891,904] [2022-04-05 23:53:53,038 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 23:53:53,046 INFO L203 MainTranslator]: Completed pre-run [2022-04-05 23:53:53,060 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/half.i[891,904] [2022-04-05 23:53:53,066 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 23:53:53,078 INFO L208 MainTranslator]: Completed translation [2022-04-05 23:53:53,079 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 11:53:53 WrapperNode [2022-04-05 23:53:53,079 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-05 23:53:53,080 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-05 23:53:53,080 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-05 23:53:53,080 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-05 23:53:53,089 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 11:53:53" (1/1) ... [2022-04-05 23:53:53,089 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 11:53:53" (1/1) ... [2022-04-05 23:53:53,094 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 11:53:53" (1/1) ... [2022-04-05 23:53:53,095 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 11:53:53" (1/1) ... [2022-04-05 23:53:53,107 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 11:53:53" (1/1) ... [2022-04-05 23:53:53,111 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 11:53:53" (1/1) ... [2022-04-05 23:53:53,112 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 11:53:53" (1/1) ... [2022-04-05 23:53:53,118 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-05 23:53:53,119 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-05 23:53:53,119 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-05 23:53:53,119 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-05 23:53:53,120 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 11:53:53" (1/1) ... [2022-04-05 23:53:53,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 23:53:53,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 23:53:53,148 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-05 23:53:53,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-05 23:53:53,195 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-05 23:53:53,196 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-05 23:53:53,196 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-05 23:53:53,197 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-05 23:53:53,197 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-05 23:53:53,197 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-05 23:53:53,198 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-05 23:53:53,198 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-05 23:53:53,198 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-04-05 23:53:53,198 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-04-05 23:53:53,198 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-05 23:53:53,198 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-05 23:53:53,198 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-05 23:53:53,198 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-05 23:53:53,198 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-05 23:53:53,198 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-05 23:53:53,199 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-05 23:53:53,199 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-05 23:53:53,199 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-05 23:53:53,199 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-05 23:53:53,199 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-05 23:53:53,199 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-05 23:53:53,276 INFO L234 CfgBuilder]: Building ICFG [2022-04-05 23:53:53,277 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-05 23:53:53,406 INFO L275 CfgBuilder]: Performing block encoding [2022-04-05 23:53:53,411 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-05 23:53:53,411 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-05 23:53:53,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 11:53:53 BoogieIcfgContainer [2022-04-05 23:53:53,413 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-05 23:53:53,414 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-05 23:53:53,415 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-05 23:53:53,418 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-05 23:53:53,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.04 11:53:52" (1/3) ... [2022-04-05 23:53:53,419 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33e5d986 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 11:53:53, skipping insertion in model container [2022-04-05 23:53:53,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 11:53:53" (2/3) ... [2022-04-05 23:53:53,419 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33e5d986 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 11:53:53, skipping insertion in model container [2022-04-05 23:53:53,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 11:53:53" (3/3) ... [2022-04-05 23:53:53,421 INFO L111 eAbstractionObserver]: Analyzing ICFG half.i [2022-04-05 23:53:53,426 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-05 23:53:53,426 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-05 23:53:53,462 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-05 23:53:53,467 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 [2022-04-05 23:53:53,468 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-05 23:53:53,480 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-05 23:53:53,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-05 23:53:53,484 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 23:53:53,485 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 23:53:53,485 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 23:53:53,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 23:53:53,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1574076283, now seen corresponding path program 1 times [2022-04-05 23:53:53,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 23:53:53,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172497718] [2022-04-05 23:53:53,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 23:53:53,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 23:53:53,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:53:53,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 23:53:53,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:53:53,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 23:53:53,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 23:53:53,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172497718] [2022-04-05 23:53:53,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172497718] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 23:53:53,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 23:53:53,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-05 23:53:53,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653965629] [2022-04-05 23:53:53,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 23:53:53,666 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-05 23:53:53,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 23:53:53,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-05 23:53:53,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 23:53:53,702 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 23:53:53,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 23:53:53,756 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2022-04-05 23:53:53,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-05 23:53:53,758 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-04-05 23:53:53,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 23:53:53,763 INFO L225 Difference]: With dead ends: 34 [2022-04-05 23:53:53,763 INFO L226 Difference]: Without dead ends: 15 [2022-04-05 23:53:53,767 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 23:53:53,771 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 23:53:53,772 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 26 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 23:53:53,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-04-05 23:53:53,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-04-05 23:53:53,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 23:53:53,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-04-05 23:53:53,804 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2022-04-05 23:53:53,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 23:53:53,804 INFO L478 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-04-05 23:53:53,805 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 23:53:53,805 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-04-05 23:53:53,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-05 23:53:53,806 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 23:53:53,806 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 23:53:53,806 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-05 23:53:53,807 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 23:53:53,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 23:53:53,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1563917552, now seen corresponding path program 1 times [2022-04-05 23:53:53,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 23:53:53,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228137825] [2022-04-05 23:53:53,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 23:53:53,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 23:53:53,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:53:54,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 23:53:54,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:53:54,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 23:53:54,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 23:53:54,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228137825] [2022-04-05 23:53:54,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228137825] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 23:53:54,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 23:53:54,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-05 23:53:54,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996449749] [2022-04-05 23:53:54,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 23:53:54,025 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-05 23:53:54,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 23:53:54,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-05 23:53:54,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-04-05 23:53:54,026 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 23:53:54,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 23:53:54,176 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2022-04-05 23:53:54,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-05 23:53:54,176 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-04-05 23:53:54,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 23:53:54,178 INFO L225 Difference]: With dead ends: 27 [2022-04-05 23:53:54,178 INFO L226 Difference]: Without dead ends: 21 [2022-04-05 23:53:54,179 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-04-05 23:53:54,180 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 31 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 23:53:54,181 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 27 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 23:53:54,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-04-05 23:53:54,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2022-04-05 23:53:54,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 23:53:54,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2022-04-05 23:53:54,186 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 12 [2022-04-05 23:53:54,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 23:53:54,187 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2022-04-05 23:53:54,187 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 23:53:54,187 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2022-04-05 23:53:54,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-04-05 23:53:54,187 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 23:53:54,188 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 23:53:54,188 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-05 23:53:54,188 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 23:53:54,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 23:53:54,189 INFO L85 PathProgramCache]: Analyzing trace with hash -505067407, now seen corresponding path program 1 times [2022-04-05 23:53:54,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 23:53:54,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098245600] [2022-04-05 23:53:54,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 23:53:54,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 23:53:54,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:53:54,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 23:53:54,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:53:54,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 23:53:54,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 23:53:54,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098245600] [2022-04-05 23:53:54,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098245600] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 23:53:54,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413899259] [2022-04-05 23:53:54,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 23:53:54,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 23:53:54,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 23:53:54,370 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 23:53:54,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-05 23:53:54,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:53:54,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-05 23:53:54,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 23:53:54,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 23:53:54,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 23:53:54,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 23:53:54,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413899259] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 23:53:54,710 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 23:53:54,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 5] total 13 [2022-04-05 23:53:54,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657825448] [2022-04-05 23:53:54,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 23:53:54,711 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-05 23:53:54,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 23:53:54,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-05 23:53:54,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-04-05 23:53:54,713 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 23:53:54,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 23:53:54,934 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2022-04-05 23:53:54,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-05 23:53:54,935 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-04-05 23:53:54,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 23:53:54,936 INFO L225 Difference]: With dead ends: 38 [2022-04-05 23:53:54,936 INFO L226 Difference]: Without dead ends: 27 [2022-04-05 23:53:54,937 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2022-04-05 23:53:54,938 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 24 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 23:53:54,938 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 44 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 23:53:54,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-04-05 23:53:54,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2022-04-05 23:53:54,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 23:53:54,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2022-04-05 23:53:54,949 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 15 [2022-04-05 23:53:54,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 23:53:54,949 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2022-04-05 23:53:54,950 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 23:53:54,950 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2022-04-05 23:53:54,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-05 23:53:54,951 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 23:53:54,951 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 23:53:54,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-05 23:53:55,170 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 23:53:55,171 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 23:53:55,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 23:53:55,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1214691282, now seen corresponding path program 1 times [2022-04-05 23:53:55,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 23:53:55,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281468881] [2022-04-05 23:53:55,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 23:53:55,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 23:53:55,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:53:55,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 23:53:55,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:53:55,402 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 23:53:55,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 23:53:55,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281468881] [2022-04-05 23:53:55,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281468881] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 23:53:55,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767467873] [2022-04-05 23:53:55,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 23:53:55,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 23:53:55,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 23:53:55,405 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 23:53:55,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-05 23:53:55,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:53:55,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-05 23:53:55,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 23:53:55,693 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 23:53:55,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 23:53:56,001 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 23:53:56,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767467873] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 23:53:56,002 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 23:53:56,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 25 [2022-04-05 23:53:56,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191402901] [2022-04-05 23:53:56,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 23:53:56,003 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-05 23:53:56,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 23:53:56,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-05 23:53:56,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2022-04-05 23:53:56,004 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 25 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 23:53:56,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 23:53:56,772 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2022-04-05 23:53:56,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-05 23:53:56,772 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-04-05 23:53:56,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 23:53:56,773 INFO L225 Difference]: With dead ends: 47 [2022-04-05 23:53:56,773 INFO L226 Difference]: Without dead ends: 33 [2022-04-05 23:53:56,774 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=295, Invalid=1511, Unknown=0, NotChecked=0, Total=1806 [2022-04-05 23:53:56,775 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 59 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 23:53:56,776 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 82 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 23:53:56,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-04-05 23:53:56,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2022-04-05 23:53:56,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 23:53:56,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2022-04-05 23:53:56,782 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 18 [2022-04-05 23:53:56,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 23:53:56,783 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2022-04-05 23:53:56,783 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 23:53:56,783 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2022-04-05 23:53:56,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-05 23:53:56,784 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 23:53:56,784 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 23:53:56,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-05 23:53:57,004 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,SelfDestructingSolverStorable3 [2022-04-05 23:53:57,004 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 23:53:57,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 23:53:57,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1937903347, now seen corresponding path program 2 times [2022-04-05 23:53:57,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 23:53:57,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357715375] [2022-04-05 23:53:57,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 23:53:57,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 23:53:57,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:53:57,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 23:53:57,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:53:57,127 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 23:53:57,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 23:53:57,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357715375] [2022-04-05 23:53:57,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357715375] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 23:53:57,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109348285] [2022-04-05 23:53:57,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 23:53:57,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 23:53:57,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 23:53:57,130 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 23:53:57,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-05 23:53:57,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 23:53:57,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 23:53:57,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-05 23:53:57,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 23:53:57,397 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 23:53:57,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 23:53:57,549 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-05 23:53:57,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109348285] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 23:53:57,549 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 23:53:57,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12, 6] total 20 [2022-04-05 23:53:57,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125909547] [2022-04-05 23:53:57,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 23:53:57,550 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-05 23:53:57,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 23:53:57,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-05 23:53:57,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-04-05 23:53:57,551 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 23:53:57,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 23:53:57,918 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2022-04-05 23:53:57,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-05 23:53:57,918 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-04-05 23:53:57,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 23:53:57,919 INFO L225 Difference]: With dead ends: 49 [2022-04-05 23:53:57,919 INFO L226 Difference]: Without dead ends: 36 [2022-04-05 23:53:57,920 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=174, Invalid=948, Unknown=0, NotChecked=0, Total=1122 [2022-04-05 23:53:57,920 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 35 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 23:53:57,921 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 83 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 23:53:57,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-04-05 23:53:57,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 31. [2022-04-05 23:53:57,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 23:53:57,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2022-04-05 23:53:57,928 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 27 [2022-04-05 23:53:57,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 23:53:57,928 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2022-04-05 23:53:57,928 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 23:53:57,929 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2022-04-05 23:53:57,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-04-05 23:53:57,929 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 23:53:57,929 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 23:53:57,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-05 23:53:58,147 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 23:53:58,148 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 23:53:58,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 23:53:58,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1932084970, now seen corresponding path program 3 times [2022-04-05 23:53:58,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 23:53:58,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294361038] [2022-04-05 23:53:58,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 23:53:58,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 23:53:58,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:53:58,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 23:53:58,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:53:58,412 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-04-05 23:53:58,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 23:53:58,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294361038] [2022-04-05 23:53:58,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294361038] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 23:53:58,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681207473] [2022-04-05 23:53:58,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 23:53:58,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 23:53:58,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 23:53:58,416 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 23:53:58,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-05 23:53:58,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-04-05 23:53:58,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 23:53:58,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-05 23:53:58,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 23:53:58,877 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 23:53:58,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 23:53:59,623 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 23:53:59,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681207473] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 23:53:59,623 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 23:53:59,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 40 [2022-04-05 23:53:59,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247652280] [2022-04-05 23:53:59,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 23:53:59,624 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-04-05 23:53:59,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 23:53:59,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-04-05 23:53:59,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1324, Unknown=0, NotChecked=0, Total=1560 [2022-04-05 23:53:59,625 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand has 40 states, 37 states have (on average 1.6756756756756757) internal successors, (62), 37 states have internal predecessors, (62), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 23:54:00,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 23:54:00,230 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2022-04-05 23:54:00,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-05 23:54:00,231 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 37 states have (on average 1.6756756756756757) internal successors, (62), 37 states have internal predecessors, (62), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-04-05 23:54:00,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 23:54:00,231 INFO L225 Difference]: With dead ends: 39 [2022-04-05 23:54:00,231 INFO L226 Difference]: Without dead ends: 0 [2022-04-05 23:54:00,233 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1108 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=579, Invalid=3203, Unknown=0, NotChecked=0, Total=3782 [2022-04-05 23:54:00,234 INFO L913 BasicCegarLoop]: 8 mSDtfsCounter, 78 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 23:54:00,234 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 100 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 23:54:00,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-05 23:54:00,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-05 23:54:00,235 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) [2022-04-05 23:54:00,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-05 23:54:00,235 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 30 [2022-04-05 23:54:00,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 23:54:00,235 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-05 23:54:00,235 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 37 states have (on average 1.6756756756756757) internal successors, (62), 37 states have internal predecessors, (62), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 23:54:00,235 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-05 23:54:00,235 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-05 23:54:00,238 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-05 23:54:00,264 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-04-05 23:54:00,451 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 23:54:00,453 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-04-05 23:54:00,686 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2022-04-05 23:54:00,686 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 12) no Hoare annotation was computed. [2022-04-05 23:54:00,686 INFO L882 garLoopResultBuilder]: For program point L12-1(line 12) no Hoare annotation was computed. [2022-04-05 23:54:00,686 INFO L882 garLoopResultBuilder]: For program point L15(line 15) no Hoare annotation was computed. [2022-04-05 23:54:00,686 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notENTRY(lines 14 16) no Hoare annotation was computed. [2022-04-05 23:54:00,687 INFO L882 garLoopResultBuilder]: For program point L15-2(lines 14 16) no Hoare annotation was computed. [2022-04-05 23:54:00,687 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 14 16) no Hoare annotation was computed. [2022-04-05 23:54:00,687 INFO L882 garLoopResultBuilder]: For program point L30(lines 30 32) no Hoare annotation was computed. [2022-04-05 23:54:00,687 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 24 36) the Hoare annotation is: true [2022-04-05 23:54:00,687 INFO L882 garLoopResultBuilder]: For program point L28(line 28) no Hoare annotation was computed. [2022-04-05 23:54:00,687 INFO L882 garLoopResultBuilder]: For program point L29-2(lines 29 33) no Hoare annotation was computed. [2022-04-05 23:54:00,687 INFO L878 garLoopResultBuilder]: At program point L29-3(lines 29 33) the Hoare annotation is: (let ((.cse0 (* main_~n~0 2))) (or (and (= main_~n~0 0) (= main_~i~0 0)) (let ((.cse1 (+ main_~i~0 1))) (and (<= .cse0 .cse1) (< main_~i~0 (* main_~k~0 2)) (<= .cse1 .cse0))) (and (<= main_~i~0 .cse0) (< main_~n~0 (+ main_~k~0 1)) (<= .cse0 main_~i~0)))) [2022-04-05 23:54:00,688 INFO L878 garLoopResultBuilder]: At program point L29-4(lines 29 33) the Hoare annotation is: (let ((.cse0 (= main_~n~0 main_~k~0))) (or (and (<= main_~k~0 0) (or (not (= main_~k~0 0)) .cse0)) (let ((.cse4 (* (- 1) main_~i~0))) (let ((.cse2 (div (+ .cse4 (- 2)) (- 2))) (.cse3 (div (+ (- 1) .cse4) (- 2)))) (let ((.cse1 (<= .cse2 .cse3))) (and .cse0 (or .cse1 (<= .cse2 (+ main_~n~0 1))) (or .cse1 (<= main_~n~0 .cse3) (< .cse2 1)))))))) [2022-04-05 23:54:00,688 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 24 36) no Hoare annotation was computed. [2022-04-05 23:54:00,688 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 24 36) no Hoare annotation was computed. [2022-04-05 23:54:00,688 INFO L882 garLoopResultBuilder]: For program point L34(line 34) no Hoare annotation was computed. [2022-04-05 23:54:00,688 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-04-05 23:54:00,688 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-04-05 23:54:00,688 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-04-05 23:54:00,688 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-04-05 23:54:00,688 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-04-05 23:54:00,688 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-04-05 23:54:00,689 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-04-05 23:54:00,689 INFO L882 garLoopResultBuilder]: For program point L18-2(lines 17 22) no Hoare annotation was computed. [2022-04-05 23:54:00,689 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2022-04-05 23:54:00,689 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 17 22) no Hoare annotation was computed. [2022-04-05 23:54:00,689 INFO L882 garLoopResultBuilder]: For program point L19(line 19) no Hoare annotation was computed. [2022-04-05 23:54:00,689 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2022-04-05 23:54:00,689 INFO L882 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2022-04-05 23:54:00,696 INFO L719 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1] [2022-04-05 23:54:00,698 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-05 23:54:00,709 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 11:54:00 BoogieIcfgContainer [2022-04-05 23:54:00,710 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-05 23:54:00,710 INFO L158 Benchmark]: Toolchain (without parser) took 7886.86ms. Allocated memory was 194.0MB in the beginning and 275.8MB in the end (delta: 81.8MB). Free memory was 138.9MB in the beginning and 132.0MB in the end (delta: 6.9MB). Peak memory consumption was 89.3MB. Max. memory is 8.0GB. [2022-04-05 23:54:00,711 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 194.0MB. Free memory is still 155.3MB. There was no memory consumed. Max. memory is 8.0GB. [2022-04-05 23:54:00,711 INFO L158 Benchmark]: CACSL2BoogieTranslator took 252.16ms. Allocated memory is still 194.0MB. Free memory was 138.7MB in the beginning and 163.8MB in the end (delta: -25.1MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2022-04-05 23:54:00,711 INFO L158 Benchmark]: Boogie Preprocessor took 38.75ms. Allocated memory is still 194.0MB. Free memory was 163.8MB in the beginning and 162.7MB in the end (delta: 1.1MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-05 23:54:00,711 INFO L158 Benchmark]: RCFGBuilder took 294.02ms. Allocated memory is still 194.0MB. Free memory was 162.7MB in the beginning and 152.3MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-04-05 23:54:00,711 INFO L158 Benchmark]: TraceAbstraction took 7295.20ms. Allocated memory was 194.0MB in the beginning and 275.8MB in the end (delta: 81.8MB). Free memory was 151.7MB in the beginning and 132.0MB in the end (delta: 19.7MB). Peak memory consumption was 101.9MB. Max. memory is 8.0GB. [2022-04-05 23:54:00,713 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 194.0MB. Free memory is still 155.3MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 252.16ms. Allocated memory is still 194.0MB. Free memory was 138.7MB in the beginning and 163.8MB in the end (delta: -25.1MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * Boogie Preprocessor took 38.75ms. Allocated memory is still 194.0MB. Free memory was 163.8MB in the beginning and 162.7MB in the end (delta: 1.1MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 294.02ms. Allocated memory is still 194.0MB. Free memory was 162.7MB in the beginning and 152.3MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 7295.20ms. Allocated memory was 194.0MB in the beginning and 275.8MB in the end (delta: 81.8MB). Free memory was 151.7MB in the beginning and 132.0MB in the end (delta: 19.7MB). Peak memory consumption was 101.9MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 19]: 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 6 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 7.2s, OverallIterations: 6, TraceHistogramMax: 6, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 2.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 243 SdHoareTripleChecker+Valid, 0.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 242 mSDsluCounter, 362 SdHoareTripleChecker+Invalid, 0.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 288 mSDsCounter, 182 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1049 IncrementalHoareTripleChecker+Invalid, 1231 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 182 mSolverCounterUnsat, 74 mSDtfsCounter, 1049 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 309 GetRequests, 136 SyntacticMatches, 9 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1935 ImplicationChecksByTransitivity, 2.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=5, InterpolantAutomatonStates: 85, 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, 6 MinimizatonAttempts, 21 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 16 PreInvPairs, 31 NumberOfFragments, 133 HoareAnnotationTreeSize, 16 FomulaSimplifications, 326 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 1022 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.4s InterpolantComputationTime, 204 NumberOfCodeBlocks, 204 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 280 ConstructedInterpolants, 0 QuantifiedInterpolants, 3082 SizeOfPredicates, 14 NumberOfNonLiveVariables, 305 ConjunctsInSsa, 68 ConjunctsInUnsatCore, 14 InterpolantComputations, 2 PerfectInterpolantSequences, 33/276 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: 29]: Loop Invariant Derived loop invariant: ((n == 0 && i == 0) || ((n * 2 <= i + 1 && i < k * 2) && i + 1 <= n * 2)) || ((i <= n * 2 && n < k + 1) && n * 2 <= i) RESULT: Ultimate proved your program to be correct! [2022-04-05 23:54:00,758 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...