/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-invgen/nested9.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-19 22:30:43,352 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 22:30:43,353 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 22:30:43,370 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-19 22:30:43,392 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 22:30:43,392 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 22:30:43,393 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 22:30:43,393 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 [2022-03-19 22:30:43,406 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 22:30:43,406 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 22:30:43,407 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-19 22:30:43,407 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-19 22:30:43,407 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-19 22:30:43,407 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-19 22:30:43,408 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-19 22:30:43,408 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-19 22:30:43,408 INFO L138 SettingsManager]: * Use SBE=true [2022-03-19 22:30:43,408 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 22:30:43,408 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-19 22:30:43,408 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 22:30:43,408 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-19 22:30:43,408 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 22:30:43,408 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 22:30:43,408 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 22:30:43,409 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 22:30:43,409 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-19 22:30:43,409 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 22:30:43,409 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 22:30:43,409 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 22:30:43,409 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 22:30:43,409 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 22:30:43,409 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 22:30:43,409 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 22:30:43,410 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 22:30:43,410 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-19 22:30:43,410 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-19 22:30:43,410 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-19 22:30:43,410 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-19 22:30:43,410 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-19 22:30:43,410 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-19 22:30:43,410 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 22:30:43,410 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 22:30:43,566 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 22:30:43,582 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 22:30:43,583 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 22:30:43,584 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 22:30:43,585 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 22:30:43,585 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/nested9.i [2022-03-19 22:30:43,631 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6e58e8b9/fdac6f42a5b44779bbcc62d1e842486b/FLAG29734a459 [2022-03-19 22:30:43,964 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 22:30:43,965 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/nested9.i [2022-03-19 22:30:43,970 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6e58e8b9/fdac6f42a5b44779bbcc62d1e842486b/FLAG29734a459 [2022-03-19 22:30:44,378 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6e58e8b9/fdac6f42a5b44779bbcc62d1e842486b [2022-03-19 22:30:44,380 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 22:30:44,381 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 22:30:44,381 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 22:30:44,381 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 22:30:44,384 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 22:30:44,386 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 10:30:44" (1/1) ... [2022-03-19 22:30:44,387 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a300fef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:30:44, skipping insertion in model container [2022-03-19 22:30:44,387 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 10:30:44" (1/1) ... [2022-03-19 22:30:44,392 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 22:30:44,402 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 22:30:44,541 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-invgen/nested9.i[893,906] [2022-03-19 22:30:44,554 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 22:30:44,560 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 22:30:44,573 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-invgen/nested9.i[893,906] [2022-03-19 22:30:44,583 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 22:30:44,593 INFO L208 MainTranslator]: Completed translation [2022-03-19 22:30:44,594 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:30:44 WrapperNode [2022-03-19 22:30:44,594 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 22:30:44,595 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 22:30:44,595 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 22:30:44,595 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 22:30:44,602 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:30:44" (1/1) ... [2022-03-19 22:30:44,603 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:30:44" (1/1) ... [2022-03-19 22:30:44,607 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:30:44" (1/1) ... [2022-03-19 22:30:44,608 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:30:44" (1/1) ... [2022-03-19 22:30:44,616 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:30:44" (1/1) ... [2022-03-19 22:30:44,621 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:30:44" (1/1) ... [2022-03-19 22:30:44,624 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:30:44" (1/1) ... [2022-03-19 22:30:44,627 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 22:30:44,628 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 22:30:44,628 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 22:30:44,628 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 22:30:44,629 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:30:44" (1/1) ... [2022-03-19 22:30:44,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 22:30:44,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:30:44,651 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) [2022-03-19 22:30:44,669 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 [2022-03-19 22:30:44,679 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 22:30:44,680 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 22:30:44,680 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 22:30:44,680 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-19 22:30:44,681 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 22:30:44,681 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 22:30:44,681 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 22:30:44,681 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 22:30:44,681 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-19 22:30:44,682 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-19 22:30:44,682 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 22:30:44,682 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 22:30:44,682 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-19 22:30:44,682 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 22:30:44,682 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-19 22:30:44,682 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 22:30:44,682 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 22:30:44,682 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 22:30:44,682 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 22:30:44,682 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 22:30:44,682 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 22:30:44,682 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 22:30:44,728 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 22:30:44,729 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 22:30:44,852 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 22:30:44,855 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 22:30:44,856 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-03-19 22:30:44,857 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 10:30:44 BoogieIcfgContainer [2022-03-19 22:30:44,857 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 22:30:44,858 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 22:30:44,858 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 22:30:44,861 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 22:30:44,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 10:30:44" (1/3) ... [2022-03-19 22:30:44,861 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c0c2ac0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 10:30:44, skipping insertion in model container [2022-03-19 22:30:44,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:30:44" (2/3) ... [2022-03-19 22:30:44,862 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c0c2ac0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 10:30:44, skipping insertion in model container [2022-03-19 22:30:44,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 10:30:44" (3/3) ... [2022-03-19 22:30:44,863 INFO L111 eAbstractionObserver]: Analyzing ICFG nested9.i [2022-03-19 22:30:44,866 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-19 22:30:44,866 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 22:30:44,893 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 22:30:44,898 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 [2022-03-19 22:30:44,898 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 22:30:44,920 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 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) [2022-03-19 22:30:44,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-19 22:30:44,937 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:30:44,938 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:30:44,938 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:30:44,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:30:44,942 INFO L85 PathProgramCache]: Analyzing trace with hash -2111647297, now seen corresponding path program 1 times [2022-03-19 22:30:44,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:30:44,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690737452] [2022-03-19 22:30:44,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:30:44,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:30:45,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:45,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:30:45,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:45,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:30:45,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:30:45,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690737452] [2022-03-19 22:30:45,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690737452] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 22:30:45,227 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 22:30:45,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 22:30:45,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779582483] [2022-03-19 22:30:45,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 22:30:45,232 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 22:30:45,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:30:45,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 22:30:45,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-19 22:30:45,257 INFO L87 Difference]: Start difference. First operand has 29 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 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 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 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) [2022-03-19 22:30:45,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:30:45,490 INFO L93 Difference]: Finished difference Result 67 states and 98 transitions. [2022-03-19 22:30:45,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 22:30:45,493 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 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 18 [2022-03-19 22:30:45,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:30:45,498 INFO L225 Difference]: With dead ends: 67 [2022-03-19 22:30:45,498 INFO L226 Difference]: Without dead ends: 41 [2022-03-19 22:30:45,500 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-03-19 22:30:45,502 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 58 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 22:30:45,503 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 54 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 22:30:45,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-19 22:30:45,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2022-03-19 22:30:45,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 28 states have internal predecessors, (33), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-19 22:30:45,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2022-03-19 22:30:45,529 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 18 [2022-03-19 22:30:45,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:30:45,529 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2022-03-19 22:30:45,529 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 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) [2022-03-19 22:30:45,530 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2022-03-19 22:30:45,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-19 22:30:45,530 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:30:45,530 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:30:45,531 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 22:30:45,531 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:30:45,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:30:45,531 INFO L85 PathProgramCache]: Analyzing trace with hash 192634036, now seen corresponding path program 1 times [2022-03-19 22:30:45,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:30:45,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627134689] [2022-03-19 22:30:45,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:30:45,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:30:45,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:45,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:30:45,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:45,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:30:45,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:30:45,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627134689] [2022-03-19 22:30:45,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627134689] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:30:45,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679509093] [2022-03-19 22:30:45,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:30:45,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:30:45,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:30:45,622 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) [2022-03-19 22:30:45,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 22:30:45,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:45,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 22:30:45,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:30:45,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:30:45,870 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 22:30:45,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679509093] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 22:30:45,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 22:30:45,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 16 [2022-03-19 22:30:45,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8309854] [2022-03-19 22:30:45,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 22:30:45,883 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 22:30:45,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:30:45,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 22:30:45,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-03-19 22:30:45,884 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:30:45,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:30:45,945 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2022-03-19 22:30:45,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 22:30:45,946 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-03-19 22:30:45,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:30:45,948 INFO L225 Difference]: With dead ends: 49 [2022-03-19 22:30:45,948 INFO L226 Difference]: Without dead ends: 47 [2022-03-19 22:30:45,948 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-03-19 22:30:45,949 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 32 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 22:30:45,950 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 109 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 22:30:45,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-19 22:30:45,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 30. [2022-03-19 22:30:45,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 22:30:45,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-03-19 22:30:45,955 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 21 [2022-03-19 22:30:45,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:30:45,955 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-03-19 22:30:45,956 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:30:45,956 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-03-19 22:30:45,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-19 22:30:45,956 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:30:45,956 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:30:45,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-19 22:30:46,171 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:30:46,172 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:30:46,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:30:46,172 INFO L85 PathProgramCache]: Analyzing trace with hash -450009679, now seen corresponding path program 1 times [2022-03-19 22:30:46,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:30:46,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154952231] [2022-03-19 22:30:46,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:30:46,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:30:46,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:46,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:30:46,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:46,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-03-19 22:30:46,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:46,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:30:46,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:30:46,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154952231] [2022-03-19 22:30:46,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154952231] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:30:46,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051226419] [2022-03-19 22:30:46,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:30:46,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:30:46,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:30:46,290 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) [2022-03-19 22:30:46,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 22:30:46,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:46,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-19 22:30:46,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:30:46,389 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 22:30:46,389 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 22:30:46,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051226419] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 22:30:46,390 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 22:30:46,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2022-03-19 22:30:46,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964008559] [2022-03-19 22:30:46,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 22:30:46,390 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 22:30:46,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:30:46,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 22:30:46,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-03-19 22:30:46,391 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 22:30:46,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:30:46,405 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2022-03-19 22:30:46,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 22:30:46,406 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2022-03-19 22:30:46,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:30:46,406 INFO L225 Difference]: With dead ends: 52 [2022-03-19 22:30:46,406 INFO L226 Difference]: Without dead ends: 33 [2022-03-19 22:30:46,407 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-03-19 22:30:46,407 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 3 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 22:30:46,408 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 43 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 22:30:46,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-19 22:30:46,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2022-03-19 22:30:46,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 25 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 22:30:46,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2022-03-19 22:30:46,412 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 25 [2022-03-19 22:30:46,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:30:46,412 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2022-03-19 22:30:46,412 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 22:30:46,412 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2022-03-19 22:30:46,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-19 22:30:46,413 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:30:46,413 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:30:46,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-19 22:30:46,627 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,SelfDestructingSolverStorable2 [2022-03-19 22:30:46,627 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:30:46,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:30:46,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1971686684, now seen corresponding path program 1 times [2022-03-19 22:30:46,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:30:46,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122418288] [2022-03-19 22:30:46,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:30:46,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:30:46,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:46,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:30:46,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:46,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 22:30:46,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:46,688 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:30:46,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:30:46,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122418288] [2022-03-19 22:30:46,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122418288] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:30:46,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791375257] [2022-03-19 22:30:46,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:30:46,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:30:46,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:30:46,690 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) [2022-03-19 22:30:46,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 22:30:46,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:46,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-19 22:30:46,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:30:46,846 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:30:46,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:30:46,886 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:30:46,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791375257] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:30:46,887 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:30:46,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2022-03-19 22:30:46,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55824055] [2022-03-19 22:30:46,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:30:46,887 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 22:30:46,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:30:46,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 22:30:46,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-03-19 22:30:46,888 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 22:30:47,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:30:47,104 INFO L93 Difference]: Finished difference Result 66 states and 78 transitions. [2022-03-19 22:30:47,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 22:30:47,105 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2022-03-19 22:30:47,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:30:47,106 INFO L225 Difference]: With dead ends: 66 [2022-03-19 22:30:47,106 INFO L226 Difference]: Without dead ends: 47 [2022-03-19 22:30:47,106 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2022-03-19 22:30:47,107 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 43 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 22:30:47,107 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 50 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 22:30:47,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-19 22:30:47,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2022-03-19 22:30:47,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 32 states have (on average 1.21875) internal successors, (39), 33 states have internal predecessors, (39), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-19 22:30:47,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2022-03-19 22:30:47,113 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 28 [2022-03-19 22:30:47,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:30:47,114 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2022-03-19 22:30:47,114 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 22:30:47,114 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2022-03-19 22:30:47,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-19 22:30:47,115 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:30:47,115 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:30:47,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-19 22:30:47,327 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:30:47,328 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:30:47,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:30:47,328 INFO L85 PathProgramCache]: Analyzing trace with hash -186544382, now seen corresponding path program 1 times [2022-03-19 22:30:47,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:30:47,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75805406] [2022-03-19 22:30:47,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:30:47,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:30:47,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:47,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:30:47,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:47,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-03-19 22:30:47,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:47,373 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 22:30:47,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:30:47,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75805406] [2022-03-19 22:30:47,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75805406] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 22:30:47,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 22:30:47,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 22:30:47,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42976791] [2022-03-19 22:30:47,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 22:30:47,374 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 22:30:47,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:30:47,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 22:30:47,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 22:30:47,375 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 22:30:47,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:30:47,414 INFO L93 Difference]: Finished difference Result 66 states and 79 transitions. [2022-03-19 22:30:47,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 22:30:47,414 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 34 [2022-03-19 22:30:47,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:30:47,415 INFO L225 Difference]: With dead ends: 66 [2022-03-19 22:30:47,415 INFO L226 Difference]: Without dead ends: 41 [2022-03-19 22:30:47,415 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-03-19 22:30:47,416 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 23 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 22:30:47,416 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 30 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 22:30:47,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-19 22:30:47,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-03-19 22:30:47,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 32 states have (on average 1.15625) internal successors, (37), 33 states have internal predecessors, (37), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-19 22:30:47,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2022-03-19 22:30:47,422 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 34 [2022-03-19 22:30:47,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:30:47,422 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2022-03-19 22:30:47,422 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 22:30:47,423 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2022-03-19 22:30:47,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-19 22:30:47,423 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:30:47,423 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:30:47,423 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-19 22:30:47,424 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:30:47,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:30:47,424 INFO L85 PathProgramCache]: Analyzing trace with hash 50284442, now seen corresponding path program 2 times [2022-03-19 22:30:47,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:30:47,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612054425] [2022-03-19 22:30:47,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:30:47,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:30:47,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:47,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:30:47,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:47,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 22:30:47,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:47,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-19 22:30:47,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:47,507 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 22:30:47,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:30:47,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612054425] [2022-03-19 22:30:47,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612054425] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:30:47,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41279997] [2022-03-19 22:30:47,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 22:30:47,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:30:47,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:30:47,509 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) [2022-03-19 22:30:47,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-19 22:30:47,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-19 22:30:47,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:30:47,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-19 22:30:47,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:30:47,680 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-03-19 22:30:47,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:30:47,766 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-03-19 22:30:47,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41279997] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:30:47,767 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:30:47,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 18 [2022-03-19 22:30:47,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289083263] [2022-03-19 22:30:47,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:30:47,767 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 22:30:47,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:30:47,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 22:30:47,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-03-19 22:30:47,768 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 18 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 8 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-19 22:30:48,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:30:48,009 INFO L93 Difference]: Finished difference Result 68 states and 80 transitions. [2022-03-19 22:30:48,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 22:30:48,013 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 8 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 41 [2022-03-19 22:30:48,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:30:48,013 INFO L225 Difference]: With dead ends: 68 [2022-03-19 22:30:48,013 INFO L226 Difference]: Without dead ends: 0 [2022-03-19 22:30:48,014 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2022-03-19 22:30:48,014 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 38 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 22:30:48,014 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 80 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 22:30:48,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-19 22:30:48,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-19 22:30:48,015 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) [2022-03-19 22:30:48,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-19 22:30:48,015 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 41 [2022-03-19 22:30:48,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:30:48,015 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-19 22:30:48,016 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 8 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-19 22:30:48,016 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-19 22:30:48,016 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-19 22:30:48,018 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-19 22:30:48,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-19 22:30:48,218 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 [2022-03-19 22:30:48,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-19 22:30:48,417 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2022-03-19 22:30:48,417 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 12) no Hoare annotation was computed. [2022-03-19 22:30:48,417 INFO L882 garLoopResultBuilder]: For program point L12-1(line 12) no Hoare annotation was computed. [2022-03-19 22:30:48,417 INFO L882 garLoopResultBuilder]: For program point L15(line 15) no Hoare annotation was computed. [2022-03-19 22:30:48,417 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notENTRY(lines 14 16) no Hoare annotation was computed. [2022-03-19 22:30:48,418 INFO L882 garLoopResultBuilder]: For program point L15-2(lines 14 16) no Hoare annotation was computed. [2022-03-19 22:30:48,418 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 14 16) no Hoare annotation was computed. [2022-03-19 22:30:48,418 INFO L882 garLoopResultBuilder]: For program point L35-2(lines 35 37) no Hoare annotation was computed. [2022-03-19 22:30:48,418 INFO L878 garLoopResultBuilder]: At program point L35-3(lines 35 37) the Hoare annotation is: (let ((.cse2 (* main_~i~0 2))) (let ((.cse0 (< main_~i~0 main_~n~0)) (.cse3 (<= .cse2 main_~j~0)) (.cse1 (<= 1 main_~i~0))) (or (and (or (and .cse0 .cse1) (and (<= (+ main_~i~0 1) main_~n~0) (= main_~i~0 0))) (<= main_~j~0 .cse2) (<= main_~i~0 1) .cse3) (let ((.cse4 (* main_~n~0 2))) (and .cse0 (<= main_~k~0 (+ main_~i~0 .cse4)) (<= main_~j~0 (+ main_~i~0 .cse4 1)) .cse3 .cse1))))) [2022-03-19 22:30:48,418 INFO L882 garLoopResultBuilder]: For program point L31(line 31) no Hoare annotation was computed. [2022-03-19 22:30:48,418 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 25 40) no Hoare annotation was computed. [2022-03-19 22:30:48,418 INFO L878 garLoopResultBuilder]: At program point L36-2(lines 36 37) the Hoare annotation is: (and (< main_~i~0 main_~n~0) (< main_~j~0 (* main_~i~0 3)) (<= main_~k~0 (+ main_~i~0 (* main_~n~0 2))) (<= (* main_~i~0 2) main_~j~0)) [2022-03-19 22:30:48,418 INFO L882 garLoopResultBuilder]: For program point L32(line 32) no Hoare annotation was computed. [2022-03-19 22:30:48,418 INFO L878 garLoopResultBuilder]: At program point L37(line 37) the Hoare annotation is: (and (< main_~i~0 main_~n~0) (< main_~j~0 (* main_~i~0 3)) (<= (* main_~i~0 2) main_~j~0) (<= (+ main_~k~0 1) main_~j~0)) [2022-03-19 22:30:48,418 INFO L882 garLoopResultBuilder]: For program point L37-1(lines 36 37) no Hoare annotation was computed. [2022-03-19 22:30:48,418 INFO L882 garLoopResultBuilder]: For program point L33(line 33) no Hoare annotation was computed. [2022-03-19 22:30:48,418 INFO L882 garLoopResultBuilder]: For program point L33-1(line 33) no Hoare annotation was computed. [2022-03-19 22:30:48,418 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 25 40) no Hoare annotation was computed. [2022-03-19 22:30:48,429 INFO L885 garLoopResultBuilder]: At program point L38(lines 25 40) the Hoare annotation is: true [2022-03-19 22:30:48,429 INFO L882 garLoopResultBuilder]: For program point L34-2(lines 34 37) no Hoare annotation was computed. [2022-03-19 22:30:48,429 INFO L878 garLoopResultBuilder]: At program point L34-3(lines 34 37) the Hoare annotation is: (let ((.cse0 (* main_~i~0 2)) (.cse3 (* main_~n~0 2))) (let ((.cse1 (<= .cse0 (+ 2 .cse3))) (.cse2 (<= 1 main_~i~0))) (or (and (<= main_~j~0 .cse0) (<= main_~i~0 1) .cse1 .cse2) (= main_~i~0 0) (and (<= 2 main_~n~0) (<= main_~k~0 (+ main_~i~0 .cse3)) (<= main_~j~0 (+ main_~i~0 .cse3 1)) .cse1 .cse2)))) [2022-03-19 22:30:48,429 INFO L882 garLoopResultBuilder]: For program point L30(line 30) no Hoare annotation was computed. [2022-03-19 22:30:48,429 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 25 40) the Hoare annotation is: true [2022-03-19 22:30:48,429 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-03-19 22:30:48,430 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= ~__BLAST_NONDET~0 |old(~__BLAST_NONDET~0)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-03-19 22:30:48,430 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-03-19 22:30:48,430 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-03-19 22:30:48,430 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-19 22:30:48,430 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-19 22:30:48,430 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-03-19 22:30:48,430 INFO L882 garLoopResultBuilder]: For program point L18-2(lines 17 22) no Hoare annotation was computed. [2022-03-19 22:30:48,430 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2022-03-19 22:30:48,430 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 17 22) no Hoare annotation was computed. [2022-03-19 22:30:48,430 INFO L882 garLoopResultBuilder]: For program point L19(line 19) no Hoare annotation was computed. [2022-03-19 22:30:48,430 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2022-03-19 22:30:48,430 INFO L882 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2022-03-19 22:30:48,432 INFO L719 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1] [2022-03-19 22:30:48,433 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-19 22:30:48,452 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.03 10:30:48 BoogieIcfgContainer [2022-03-19 22:30:48,452 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-19 22:30:48,452 INFO L158 Benchmark]: Toolchain (without parser) took 4071.59ms. Allocated memory was 200.3MB in the beginning and 308.3MB in the end (delta: 108.0MB). Free memory was 170.2MB in the beginning and 277.1MB in the end (delta: -106.9MB). Peak memory consumption was 177.8MB. Max. memory is 8.0GB. [2022-03-19 22:30:48,452 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 200.3MB. Free memory is still 157.3MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-19 22:30:48,453 INFO L158 Benchmark]: CACSL2BoogieTranslator took 212.97ms. Allocated memory was 200.3MB in the beginning and 308.3MB in the end (delta: 108.0MB). Free memory was 169.9MB in the beginning and 278.5MB in the end (delta: -108.6MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. [2022-03-19 22:30:48,453 INFO L158 Benchmark]: Boogie Preprocessor took 32.15ms. Allocated memory is still 308.3MB. Free memory was 278.5MB in the beginning and 277.0MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-19 22:30:48,454 INFO L158 Benchmark]: RCFGBuilder took 229.26ms. Allocated memory is still 308.3MB. Free memory was 277.0MB in the beginning and 265.4MB in the end (delta: 11.6MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-19 22:30:48,454 INFO L158 Benchmark]: TraceAbstraction took 3593.95ms. Allocated memory is still 308.3MB. Free memory was 264.9MB in the beginning and 277.1MB in the end (delta: -12.3MB). Peak memory consumption was 165.3MB. Max. memory is 8.0GB. [2022-03-19 22:30:48,455 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 200.3MB. Free memory is still 157.3MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 212.97ms. Allocated memory was 200.3MB in the beginning and 308.3MB in the end (delta: 108.0MB). Free memory was 169.9MB in the beginning and 278.5MB in the end (delta: -108.6MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. * Boogie Preprocessor took 32.15ms. Allocated memory is still 308.3MB. Free memory was 278.5MB in the beginning and 277.0MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 229.26ms. Allocated memory is still 308.3MB. Free memory was 277.0MB in the beginning and 265.4MB in the end (delta: 11.6MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 3593.95ms. Allocated memory is still 308.3MB. Free memory was 264.9MB in the beginning and 277.1MB in the end (delta: -12.3MB). Peak memory consumption was 165.3MB. 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, 36 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 3.5s, OverallIterations: 6, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 202 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 197 mSDsluCounter, 366 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 241 mSDsCounter, 95 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 685 IncrementalHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 95 mSolverCounterUnsat, 125 mSDtfsCounter, 685 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 278 GetRequests, 189 SyntacticMatches, 2 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=41occurred in iteration=4, InterpolantAutomatonStates: 52, 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, 29 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 10 LocationsWithAnnotation, 23 PreInvPairs, 40 NumberOfFragments, 170 HoareAnnotationTreeSize, 23 FomulaSimplifications, 39 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 10 FomulaSimplificationsInter, 810 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 282 NumberOfCodeBlocks, 259 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 339 ConstructedInterpolants, 0 QuantifiedInterpolants, 903 SizeOfPredicates, 12 NumberOfNonLiveVariables, 348 ConjunctsInSsa, 22 ConjunctsInUnsatCore, 12 InterpolantComputations, 4 PerfectInterpolantSequences, 101/130 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: 35]: Loop Invariant Derived loop invariant: (((((i < n && 1 <= i) || (i + 1 <= n && i == 0)) && j <= i * 2) && i <= 1) && i * 2 <= j) || ((((i < n && k <= i + n * 2) && j <= i + n * 2 + 1) && i * 2 <= j) && 1 <= i) - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: ((((j <= i * 2 && i <= 1) && i * 2 <= 2 + n * 2) && 1 <= i) || i == 0) || ((((2 <= n && k <= i + n * 2) && j <= i + n * 2 + 1) && i * 2 <= 2 + n * 2) && 1 <= i) - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: ((i < n && j < i * 3) && k <= i + n * 2) && i * 2 <= j RESULT: Ultimate proved your program to be correct! [2022-03-19 22:30:48,484 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...