/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loop-zilu/benchmark05_conjunctive.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 19:12:41,002 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 19:12:41,004 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 19:12:41,056 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 19:12:41,089 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 19:12:41,090 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 19:12:41,094 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 19:12:41,095 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-20 19:12:41,103 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 19:12:41,103 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 19:12:41,104 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 19:12:41,104 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 19:12:41,104 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 19:12:41,104 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 19:12:41,104 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 19:12:41,105 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 19:12:41,105 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 19:12:41,105 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 19:12:41,105 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 19:12:41,105 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 19:12:41,106 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 19:12:41,106 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 19:12:41,106 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 19:12:41,106 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 19:12:41,106 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 19:12:41,106 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 19:12:41,107 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 19:12:41,107 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 19:12:41,107 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 19:12:41,107 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-20 19:12:41,107 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 19:12:41,306 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 19:12:41,324 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 19:12:41,326 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 19:12:41,327 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 19:12:41,329 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 19:12:41,330 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-zilu/benchmark05_conjunctive.i [2022-03-20 19:12:41,402 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49ea01a59/237ce0cbc5124218ac5401ce911b07ed/FLAG20ff37e99 [2022-03-20 19:12:41,763 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 19:12:41,763 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-zilu/benchmark05_conjunctive.i [2022-03-20 19:12:41,768 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49ea01a59/237ce0cbc5124218ac5401ce911b07ed/FLAG20ff37e99 [2022-03-20 19:12:41,781 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49ea01a59/237ce0cbc5124218ac5401ce911b07ed [2022-03-20 19:12:41,783 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 19:12:41,784 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 19:12:41,785 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 19:12:41,785 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 19:12:41,789 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 19:12:41,789 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 07:12:41" (1/1) ... [2022-03-20 19:12:41,790 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d00ad83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:12:41, skipping insertion in model container [2022-03-20 19:12:41,790 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 07:12:41" (1/1) ... [2022-03-20 19:12:41,796 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 19:12:41,807 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 19:12:42,009 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-zilu/benchmark05_conjunctive.i[873,886] [2022-03-20 19:12:42,020 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 19:12:42,031 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 19:12:42,044 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-zilu/benchmark05_conjunctive.i[873,886] [2022-03-20 19:12:42,049 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 19:12:42,059 INFO L208 MainTranslator]: Completed translation [2022-03-20 19:12:42,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:12:42 WrapperNode [2022-03-20 19:12:42,060 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 19:12:42,061 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 19:12:42,061 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 19:12:42,061 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 19:12:42,069 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:12:42" (1/1) ... [2022-03-20 19:12:42,069 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:12:42" (1/1) ... [2022-03-20 19:12:42,076 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:12:42" (1/1) ... [2022-03-20 19:12:42,076 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:12:42" (1/1) ... [2022-03-20 19:12:42,090 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:12:42" (1/1) ... [2022-03-20 19:12:42,093 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:12:42" (1/1) ... [2022-03-20 19:12:42,094 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:12:42" (1/1) ... [2022-03-20 19:12:42,095 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 19:12:42,096 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 19:12:42,096 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 19:12:42,096 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 19:12:42,097 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:12:42" (1/1) ... [2022-03-20 19:12:42,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 19:12:42,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:12:42,123 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) [2022-03-20 19:12:42,135 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 [2022-03-20 19:12:42,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 19:12:42,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 19:12:42,156 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 19:12:42,156 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 19:12:42,156 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 19:12:42,156 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 19:12:42,156 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-20 19:12:42,156 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-20 19:12:42,156 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 19:12:42,156 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 19:12:42,157 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 19:12:42,157 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2022-03-20 19:12:42,157 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 19:12:42,157 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 19:12:42,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 19:12:42,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 19:12:42,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 19:12:42,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 19:12:42,158 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 19:12:42,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 19:12:42,207 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 19:12:42,208 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 19:12:42,280 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 19:12:42,285 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 19:12:42,285 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 19:12:42,286 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 07:12:42 BoogieIcfgContainer [2022-03-20 19:12:42,286 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 19:12:42,288 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 19:12:42,288 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 19:12:42,305 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 19:12:42,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 07:12:41" (1/3) ... [2022-03-20 19:12:42,306 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@85d54b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 07:12:42, skipping insertion in model container [2022-03-20 19:12:42,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:12:42" (2/3) ... [2022-03-20 19:12:42,306 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@85d54b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 07:12:42, skipping insertion in model container [2022-03-20 19:12:42,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 07:12:42" (3/3) ... [2022-03-20 19:12:42,307 INFO L111 eAbstractionObserver]: Analyzing ICFG benchmark05_conjunctive.i [2022-03-20 19:12:42,311 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 19:12:42,311 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 19:12:42,343 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 19:12:42,349 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 19:12:42,349 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 19:12:42,360 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 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) [2022-03-20 19:12:42,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-20 19:12:42,366 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:12:42,366 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:12:42,367 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:12:42,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:12:42,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1005951186, now seen corresponding path program 1 times [2022-03-20 19:12:42,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:12:42,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1078111195] [2022-03-20 19:12:42,386 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:12:42,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1005951186, now seen corresponding path program 2 times [2022-03-20 19:12:42,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:12:42,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642028414] [2022-03-20 19:12:42,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:12:42,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:12:42,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:12:42,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:12:42,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:12:42,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:12:42,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:12:42,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642028414] [2022-03-20 19:12:42,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642028414] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:12:42,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:12:42,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:12:42,587 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:12:42,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1078111195] [2022-03-20 19:12:42,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1078111195] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:12:42,588 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:12:42,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:12:42,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421797663] [2022-03-20 19:12:42,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:12:42,592 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 19:12:42,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:12:42,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 19:12:42,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 19:12:42,635 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 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 4 states, 4 states have (on average 2.0) internal successors, (8), 3 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) [2022-03-20 19:12:42,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:12:42,695 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2022-03-20 19:12:42,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 19:12:42,697 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 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 [2022-03-20 19:12:42,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:12:42,717 INFO L225 Difference]: With dead ends: 34 [2022-03-20 19:12:42,718 INFO L226 Difference]: Without dead ends: 15 [2022-03-20 19:12:42,720 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 19:12:42,723 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 14 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:12:42,724 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 30 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:12:42,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-03-20 19:12:42,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-03-20 19:12:42,780 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) [2022-03-20 19:12:42,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-03-20 19:12:42,781 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2022-03-20 19:12:42,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:12:42,791 INFO L478 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-03-20 19:12:42,791 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 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) [2022-03-20 19:12:42,791 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-03-20 19:12:42,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-20 19:12:42,792 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:12:42,792 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:12:42,792 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 19:12:42,793 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:12:42,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:12:42,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1392462319, now seen corresponding path program 1 times [2022-03-20 19:12:42,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:12:42,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1313901725] [2022-03-20 19:12:43,717 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:12:43,718 INFO L85 PathProgramCache]: Analyzing trace with hash -2110136851, now seen corresponding path program 1 times [2022-03-20 19:12:43,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:12:43,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736744656] [2022-03-20 19:12:43,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:12:43,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:12:43,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:12:43,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:12:43,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:12:43,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:12:43,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:12:43,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736744656] [2022-03-20 19:12:43,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736744656] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:12:43,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:12:43,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:12:44,789 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:12:44,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1313901725] [2022-03-20 19:12:44,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1313901725] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:12:44,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:12:44,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 19:12:44,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795778451] [2022-03-20 19:12:44,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:12:44,791 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 19:12:44,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:12:44,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 19:12:44,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-20 19:12:44,792 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 10 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 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) [2022-03-20 19:12:44,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:12:44,897 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2022-03-20 19:12:44,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 19:12:44,899 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 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 14 [2022-03-20 19:12:44,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:12:44,900 INFO L225 Difference]: With dead ends: 22 [2022-03-20 19:12:44,901 INFO L226 Difference]: Without dead ends: 15 [2022-03-20 19:12:44,903 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-03-20 19:12:44,906 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 11 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:12:44,908 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 35 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 29 Invalid, 0 Unknown, 15 Unchecked, 0.0s Time] [2022-03-20 19:12:44,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-03-20 19:12:44,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-03-20 19:12:44,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 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) [2022-03-20 19:12:44,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2022-03-20 19:12:44,913 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 14 [2022-03-20 19:12:44,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:12:44,913 INFO L478 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2022-03-20 19:12:44,913 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 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) [2022-03-20 19:12:44,913 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2022-03-20 19:12:44,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-20 19:12:44,914 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:12:44,914 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:12:44,914 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 19:12:44,914 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:12:44,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:12:44,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1449720621, now seen corresponding path program 1 times [2022-03-20 19:12:44,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:12:44,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1979551622] [2022-03-20 19:12:44,979 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:12:44,980 INFO L85 PathProgramCache]: Analyzing trace with hash -2051031507, now seen corresponding path program 1 times [2022-03-20 19:12:44,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:12:44,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163225888] [2022-03-20 19:12:44,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:12:44,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:12:44,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:12:45,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:12:45,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:12:45,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:12:45,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:12:45,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163225888] [2022-03-20 19:12:45,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163225888] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:12:45,061 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:12:45,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 19:12:45,121 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:12:45,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1979551622] [2022-03-20 19:12:45,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1979551622] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:12:45,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:12:45,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:12:45,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074164690] [2022-03-20 19:12:45,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:12:45,123 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 19:12:45,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:12:45,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 19:12:45,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-03-20 19:12:45,125 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 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) [2022-03-20 19:12:45,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:12:45,156 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2022-03-20 19:12:45,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 19:12:45,157 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 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 14 [2022-03-20 19:12:45,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:12:45,157 INFO L225 Difference]: With dead ends: 15 [2022-03-20 19:12:45,158 INFO L226 Difference]: Without dead ends: 0 [2022-03-20 19:12:45,158 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-03-20 19:12:45,159 INFO L913 BasicCegarLoop]: 7 mSDtfsCounter, 4 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:12:45,160 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 14 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:12:45,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-20 19:12:45,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-20 19:12:45,161 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) [2022-03-20 19:12:45,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-20 19:12:45,161 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2022-03-20 19:12:45,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:12:45,161 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-20 19:12:45,161 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 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) [2022-03-20 19:12:45,161 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-20 19:12:45,161 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-20 19:12:45,164 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 19:12:45,164 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-20 19:12:45,166 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-20 19:12:45,271 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 11) no Hoare annotation was computed. [2022-03-20 19:12:45,271 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 11) no Hoare annotation was computed. [2022-03-20 19:12:45,271 INFO L882 garLoopResultBuilder]: For program point L11-1(line 11) no Hoare annotation was computed. [2022-03-20 19:12:45,271 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 19 30) the Hoare annotation is: true [2022-03-20 19:12:45,272 INFO L885 garLoopResultBuilder]: At program point L28(line 28) the Hoare annotation is: true [2022-03-20 19:12:45,272 INFO L878 garLoopResultBuilder]: At program point L26(line 26) the Hoare annotation is: (let ((.cse0 (<= main_~x~0 main_~n~0))) (or (and (<= (+ main_~y~0 1) main_~n~0) .cse0) (and .cse0 (< main_~y~0 (+ main_~x~0 1))))) [2022-03-20 19:12:45,272 INFO L885 garLoopResultBuilder]: At program point mainEXIT(lines 19 30) the Hoare annotation is: true [2022-03-20 19:12:45,272 INFO L878 garLoopResultBuilder]: At program point L26-2(lines 24 27) the Hoare annotation is: (let ((.cse0 (+ main_~x~0 1))) (or (and (<= (+ main_~y~0 1) main_~n~0) (<= .cse0 main_~n~0)) (and (<= main_~x~0 main_~n~0) (< main_~y~0 .cse0)))) [2022-03-20 19:12:45,272 INFO L885 garLoopResultBuilder]: At program point L23(line 23) the Hoare annotation is: true [2022-03-20 19:12:45,272 INFO L878 garLoopResultBuilder]: At program point L24-2(lines 24 27) the Hoare annotation is: (and (not (< main_~x~0 main_~n~0)) (<= main_~x~0 main_~n~0) (< main_~y~0 (+ main_~x~0 1))) [2022-03-20 19:12:45,272 INFO L885 garLoopResultBuilder]: At program point mainFINAL(lines 19 30) the Hoare annotation is: true [2022-03-20 19:12:45,272 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2022-03-20 19:12:45,273 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|)) [2022-03-20 19:12:45,273 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2022-03-20 19:12:45,273 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-03-20 19:12:45,273 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-20 19:12:45,273 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-20 19:12:45,273 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-03-20 19:12:45,273 INFO L878 garLoopResultBuilder]: At program point L16(line 16) the Hoare annotation is: (or (and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0)) (forall ((v_main_~n~0_9 Int) (v_main_~y~0_14 Int)) (or (let ((.cse0 (= v_main_~y~0_14 v_main_~n~0_9))) (and (or .cse0 (not (= |__VERIFIER_assert_#in~cond| 0))) (or (not (= |__VERIFIER_assert_#in~cond| 1)) (not .cse0)))) (not (<= main_~x~0 v_main_~n~0_9)) (not (< v_main_~y~0_14 (+ main_~x~0 1))) (< main_~x~0 v_main_~n~0_9)))) [2022-03-20 19:12:45,273 INFO L878 garLoopResultBuilder]: At program point L15(lines 15 17) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (forall ((v_main_~n~0_9 Int) (v_main_~y~0_14 Int)) (or (let ((.cse0 (= v_main_~y~0_14 v_main_~n~0_9))) (and (or .cse0 (not (= |__VERIFIER_assert_#in~cond| 0))) (or (not (= |__VERIFIER_assert_#in~cond| 1)) (not .cse0)))) (not (<= main_~x~0 v_main_~n~0_9)) (not (< v_main_~y~0_14 (+ main_~x~0 1))) (< main_~x~0 v_main_~n~0_9)))) [2022-03-20 19:12:45,274 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 14 18) the Hoare annotation is: true [2022-03-20 19:12:45,274 INFO L885 garLoopResultBuilder]: At program point L15-2(lines 14 18) the Hoare annotation is: true [2022-03-20 19:12:45,274 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 14 18) the Hoare annotation is: true [2022-03-20 19:12:45,274 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) the Hoare annotation is: (forall ((v_main_~n~0_9 Int) (v_main_~y~0_14 Int)) (or (let ((.cse0 (= v_main_~y~0_14 v_main_~n~0_9))) (and (or .cse0 (not (= |__VERIFIER_assert_#in~cond| 0))) (or (not (= |__VERIFIER_assert_#in~cond| 1)) (not .cse0)))) (not (<= main_~x~0 v_main_~n~0_9)) (not (< v_main_~y~0_14 (+ main_~x~0 1))) (< main_~x~0 v_main_~n~0_9))) [2022-03-20 19:12:45,277 INFO L719 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1] [2022-03-20 19:12:45,278 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 19:12:45,296 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 07:12:45 BoogieIcfgContainer [2022-03-20 19:12:45,296 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 19:12:45,297 INFO L158 Benchmark]: Toolchain (without parser) took 3513.04ms. Allocated memory was 192.9MB in the beginning and 242.2MB in the end (delta: 49.3MB). Free memory was 137.3MB in the beginning and 178.6MB in the end (delta: -41.3MB). Peak memory consumption was 8.5MB. Max. memory is 8.0GB. [2022-03-20 19:12:45,297 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 192.9MB. Free memory is still 153.8MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 19:12:45,298 INFO L158 Benchmark]: CACSL2BoogieTranslator took 274.89ms. Allocated memory was 192.9MB in the beginning and 242.2MB in the end (delta: 49.3MB). Free memory was 137.1MB in the beginning and 213.6MB in the end (delta: -76.5MB). Peak memory consumption was 9.6MB. Max. memory is 8.0GB. [2022-03-20 19:12:45,298 INFO L158 Benchmark]: Boogie Preprocessor took 34.75ms. Allocated memory is still 242.2MB. Free memory was 213.6MB in the beginning and 212.3MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 19:12:45,301 INFO L158 Benchmark]: RCFGBuilder took 190.46ms. Allocated memory is still 242.2MB. Free memory was 212.3MB in the beginning and 201.9MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-20 19:12:45,302 INFO L158 Benchmark]: TraceAbstraction took 3008.74ms. Allocated memory is still 242.2MB. Free memory was 201.6MB in the beginning and 178.6MB in the end (delta: 23.0MB). Peak memory consumption was 23.0MB. Max. memory is 8.0GB. [2022-03-20 19:12:45,304 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 192.9MB. Free memory is still 153.8MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 274.89ms. Allocated memory was 192.9MB in the beginning and 242.2MB in the end (delta: 49.3MB). Free memory was 137.1MB in the beginning and 213.6MB in the end (delta: -76.5MB). Peak memory consumption was 9.6MB. Max. memory is 8.0GB. * Boogie Preprocessor took 34.75ms. Allocated memory is still 242.2MB. Free memory was 213.6MB in the beginning and 212.3MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 190.46ms. Allocated memory is still 242.2MB. Free memory was 212.3MB in the beginning and 201.9MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 3008.74ms. Allocated memory is still 242.2MB. Free memory was 201.6MB in the beginning and 178.6MB in the end (delta: 23.0MB). Peak memory consumption was 23.0MB. 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: 16]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2.9s, OverallIterations: 3, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 30 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 29 mSDsluCounter, 79 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 15 IncrementalHoareTripleChecker+Unchecked, 42 mSDsCounter, 18 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 54 IncrementalHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 18 mSolverCounterUnsat, 37 mSDtfsCounter, 54 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=0, InterpolantAutomatonStates: 19, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 21 LocationsWithAnnotation, 33 PreInvPairs, 46 NumberOfFragments, 185 HoareAnnotationTreeSize, 33 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 21 FomulaSimplificationsInter, 141 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: (y + 1 <= n && x + 1 <= n) || (x <= n && y < x + 1) - ProcedureContractResult [Line: 19]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 14]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: 1 RESULT: Ultimate proved your program to be correct! [2022-03-20 19:12:45,326 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...