/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-acceleration/nested_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-18 00:15:21,233 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 00:15:21,234 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 00:15:21,297 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-18 00:15:21,343 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 00:15:21,344 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 00:15:21,345 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 00:15:21,346 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-18 00:15:21,354 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 00:15:21,354 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 00:15:21,356 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 00:15:21,356 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 00:15:21,356 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 00:15:21,356 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 00:15:21,356 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 00:15:21,357 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 00:15:21,357 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 00:15:21,357 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 00:15:21,357 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 00:15:21,357 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 00:15:21,358 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 00:15:21,358 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 00:15:21,358 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 00:15:21,358 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 00:15:21,358 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 00:15:21,358 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-18 00:15:21,358 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-18 00:15:21,358 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-18 00:15:21,358 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 00:15:21,358 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-18 00:15:21,358 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 00:15:21,577 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 00:15:21,598 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 00:15:21,600 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 00:15:21,600 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 00:15:21,601 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 00:15:21,602 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/nested_1-1.c [2022-03-18 00:15:21,658 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ca0aba04/15e608a8fde946858301f9a4a18cda51/FLAG5e678a487 [2022-03-18 00:15:22,019 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 00:15:22,019 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/nested_1-1.c [2022-03-18 00:15:22,023 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ca0aba04/15e608a8fde946858301f9a4a18cda51/FLAG5e678a487 [2022-03-18 00:15:22,033 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ca0aba04/15e608a8fde946858301f9a4a18cda51 [2022-03-18 00:15:22,035 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 00:15:22,036 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-18 00:15:22,037 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 00:15:22,037 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 00:15:22,040 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 00:15:22,040 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 12:15:22" (1/1) ... [2022-03-18 00:15:22,041 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60e465b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:15:22, skipping insertion in model container [2022-03-18 00:15:22,041 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 12:15:22" (1/1) ... [2022-03-18 00:15:22,046 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 00:15:22,054 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 00:15:22,180 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-acceleration/nested_1-1.c[322,335] [2022-03-18 00:15:22,197 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 00:15:22,203 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 00:15:22,212 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-acceleration/nested_1-1.c[322,335] [2022-03-18 00:15:22,220 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 00:15:22,229 INFO L208 MainTranslator]: Completed translation [2022-03-18 00:15:22,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:15:22 WrapperNode [2022-03-18 00:15:22,230 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 00:15:22,231 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 00:15:22,231 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 00:15:22,231 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 00:15:22,240 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:15:22" (1/1) ... [2022-03-18 00:15:22,240 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:15:22" (1/1) ... [2022-03-18 00:15:22,247 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:15:22" (1/1) ... [2022-03-18 00:15:22,247 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:15:22" (1/1) ... [2022-03-18 00:15:22,255 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:15:22" (1/1) ... [2022-03-18 00:15:22,259 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:15:22" (1/1) ... [2022-03-18 00:15:22,261 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:15:22" (1/1) ... [2022-03-18 00:15:22,266 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 00:15:22,267 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 00:15:22,267 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 00:15:22,267 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 00:15:22,268 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:15:22" (1/1) ... [2022-03-18 00:15:22,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 00:15:22,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:15:22,308 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-18 00:15:22,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-18 00:15:22,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 00:15:22,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 00:15:22,343 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 00:15:22,343 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 00:15:22,343 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 00:15:22,343 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 00:15:22,343 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 00:15:22,343 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 00:15:22,344 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 00:15:22,344 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 00:15:22,344 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 00:15:22,344 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 00:15:22,344 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 00:15:22,344 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 00:15:22,344 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 00:15:22,344 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 00:15:22,344 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 00:15:22,392 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 00:15:22,393 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 00:15:22,518 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 00:15:22,522 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 00:15:22,522 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-18 00:15:22,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 12:15:22 BoogieIcfgContainer [2022-03-18 00:15:22,523 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 00:15:22,525 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 00:15:22,525 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 00:15:22,527 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 00:15:22,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 12:15:22" (1/3) ... [2022-03-18 00:15:22,527 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@436fbf87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 12:15:22, skipping insertion in model container [2022-03-18 00:15:22,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:15:22" (2/3) ... [2022-03-18 00:15:22,528 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@436fbf87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 12:15:22, skipping insertion in model container [2022-03-18 00:15:22,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 12:15:22" (3/3) ... [2022-03-18 00:15:22,529 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_1-1.c [2022-03-18 00:15:22,532 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-18 00:15:22,532 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 00:15:22,577 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 00:15:22,582 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 [2022-03-18 00:15:22,583 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 00:15:22,604 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 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) [2022-03-18 00:15:22,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-18 00:15:22,609 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:15:22,610 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:15:22,611 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:15:22,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:15:22,614 INFO L85 PathProgramCache]: Analyzing trace with hash 2021311625, now seen corresponding path program 1 times [2022-03-18 00:15:22,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:22,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1877189229] [2022-03-18 00:15:22,630 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:15:22,630 INFO L85 PathProgramCache]: Analyzing trace with hash 2021311625, now seen corresponding path program 2 times [2022-03-18 00:15:22,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:15:22,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204702268] [2022-03-18 00:15:22,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:15:22,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:15:22,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:22,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:15:22,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:22,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:15:22,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:15:22,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204702268] [2022-03-18 00:15:22,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204702268] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:15:22,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:15:22,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:15:22,839 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:15:22,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1877189229] [2022-03-18 00:15:22,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1877189229] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:15:22,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:15:22,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:15:22,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295921106] [2022-03-18 00:15:22,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:15:22,844 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 00:15:22,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:22,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 00:15:22,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 00:15:22,869 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 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 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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) [2022-03-18 00:15:22,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:15:22,934 INFO L93 Difference]: Finished difference Result 37 states and 50 transitions. [2022-03-18 00:15:22,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 00:15:22,936 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 11 [2022-03-18 00:15:22,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:15:22,941 INFO L225 Difference]: With dead ends: 37 [2022-03-18 00:15:22,942 INFO L226 Difference]: Without dead ends: 17 [2022-03-18 00:15:22,944 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 00:15:22,948 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 18 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:15:22,950 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 27 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:15:22,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-03-18 00:15:22,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 15. [2022-03-18 00:15:22,989 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) [2022-03-18 00:15:22,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-03-18 00:15:22,990 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2022-03-18 00:15:22,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:15:22,991 INFO L478 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-03-18 00:15:22,991 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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) [2022-03-18 00:15:22,991 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-03-18 00:15:22,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-18 00:15:22,992 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:15:22,992 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:15:22,993 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 00:15:22,994 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:15:22,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:15:22,994 INFO L85 PathProgramCache]: Analyzing trace with hash -2037585725, now seen corresponding path program 1 times [2022-03-18 00:15:22,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:22,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [467762325] [2022-03-18 00:15:23,158 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:15:23,160 INFO L85 PathProgramCache]: Analyzing trace with hash -645021174, now seen corresponding path program 1 times [2022-03-18 00:15:23,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:15:23,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538361345] [2022-03-18 00:15:23,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:15:23,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:15:23,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:23,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:15:23,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:23,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:15:23,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:15:23,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538361345] [2022-03-18 00:15:23,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538361345] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:15:23,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:15:23,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:15:23,288 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:15:23,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [467762325] [2022-03-18 00:15:23,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [467762325] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:15:23,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:15:23,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 00:15:23,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143371238] [2022-03-18 00:15:23,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:15:23,290 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 00:15:23,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:23,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 00:15:23,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-18 00:15:23,291 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 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) [2022-03-18 00:15:23,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:15:23,324 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2022-03-18 00:15:23,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 00:15:23,324 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 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 [2022-03-18 00:15:23,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:15:23,325 INFO L225 Difference]: With dead ends: 26 [2022-03-18 00:15:23,325 INFO L226 Difference]: Without dead ends: 18 [2022-03-18 00:15:23,325 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-18 00:15:23,326 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:15:23,327 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 19 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:15:23,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-03-18 00:15:23,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2022-03-18 00:15:23,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 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) [2022-03-18 00:15:23,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2022-03-18 00:15:23,330 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 14 [2022-03-18 00:15:23,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:15:23,331 INFO L478 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2022-03-18 00:15:23,331 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 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) [2022-03-18 00:15:23,331 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2022-03-18 00:15:23,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-18 00:15:23,331 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:15:23,331 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:15:23,332 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 00:15:23,332 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:15:23,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:15:23,332 INFO L85 PathProgramCache]: Analyzing trace with hash -183414982, now seen corresponding path program 1 times [2022-03-18 00:15:23,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:23,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [77479375] [2022-03-18 00:15:23,470 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:15:23,471 INFO L85 PathProgramCache]: Analyzing trace with hash -585915830, now seen corresponding path program 1 times [2022-03-18 00:15:23,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:15:23,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304967950] [2022-03-18 00:15:23,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:15:23,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:15:23,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:23,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:15:23,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:23,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:15:23,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:15:23,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304967950] [2022-03-18 00:15:23,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304967950] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:15:23,512 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:15:23,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:15:23,544 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:15:23,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [77479375] [2022-03-18 00:15:23,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [77479375] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:15:23,545 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:15:23,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 00:15:23,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364968328] [2022-03-18 00:15:23,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:15:23,545 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 00:15:23,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:23,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 00:15:23,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 00:15:23,547 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 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) [2022-03-18 00:15:23,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:15:23,605 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2022-03-18 00:15:23,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 00:15:23,606 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 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 15 [2022-03-18 00:15:23,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:15:23,607 INFO L225 Difference]: With dead ends: 27 [2022-03-18 00:15:23,607 INFO L226 Difference]: Without dead ends: 19 [2022-03-18 00:15:23,608 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-03-18 00:15:23,610 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:15:23,613 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 29 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:15:23,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-03-18 00:15:23,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2022-03-18 00:15:23,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 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) [2022-03-18 00:15:23,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2022-03-18 00:15:23,619 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2022-03-18 00:15:23,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:15:23,619 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2022-03-18 00:15:23,619 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 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) [2022-03-18 00:15:23,619 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2022-03-18 00:15:23,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-18 00:15:23,620 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:15:23,620 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:15:23,620 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-18 00:15:23,622 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:15:23,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:15:23,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1461303203, now seen corresponding path program 2 times [2022-03-18 00:15:23,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:23,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1123473827] [2022-03-18 00:15:23,779 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:15:23,780 INFO L85 PathProgramCache]: Analyzing trace with hash -526810486, now seen corresponding path program 1 times [2022-03-18 00:15:23,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:15:23,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451286584] [2022-03-18 00:15:23,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:15:23,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:15:23,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:23,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:15:23,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:23,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:15:23,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:15:23,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451286584] [2022-03-18 00:15:23,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451286584] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:15:23,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:15:23,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:15:23,885 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:15:23,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1123473827] [2022-03-18 00:15:23,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1123473827] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:15:23,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:15:23,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-18 00:15:23,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168096898] [2022-03-18 00:15:23,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:15:23,886 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-18 00:15:23,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:23,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-18 00:15:23,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-03-18 00:15:23,887 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 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) [2022-03-18 00:15:23,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:15:23,993 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2022-03-18 00:15:23,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 00:15:23,993 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 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 16 [2022-03-18 00:15:23,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:15:23,993 INFO L225 Difference]: With dead ends: 28 [2022-03-18 00:15:23,994 INFO L226 Difference]: Without dead ends: 20 [2022-03-18 00:15:23,994 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-03-18 00:15:23,995 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:15:23,995 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 24 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:15:23,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-03-18 00:15:23,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2022-03-18 00:15:23,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 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) [2022-03-18 00:15:23,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-03-18 00:15:23,998 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2022-03-18 00:15:23,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:15:23,998 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-03-18 00:15:23,998 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 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) [2022-03-18 00:15:23,999 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-03-18 00:15:23,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-18 00:15:23,999 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:15:23,999 INFO L500 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:15:23,999 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-18 00:15:23,999 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:15:24,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:15:24,000 INFO L85 PathProgramCache]: Analyzing trace with hash 907959386, now seen corresponding path program 3 times [2022-03-18 00:15:24,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:24,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [543114906] [2022-03-18 00:15:24,119 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:15:24,120 INFO L85 PathProgramCache]: Analyzing trace with hash -467705142, now seen corresponding path program 1 times [2022-03-18 00:15:24,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:15:24,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011967993] [2022-03-18 00:15:24,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:15:24,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:15:24,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:24,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:15:24,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:24,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:15:24,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:15:24,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011967993] [2022-03-18 00:15:24,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011967993] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:15:24,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:15:24,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:15:24,247 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:15:24,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [543114906] [2022-03-18 00:15:24,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [543114906] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:15:24,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:15:24,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 00:15:24,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958824526] [2022-03-18 00:15:24,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:15:24,249 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 00:15:24,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:24,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 00:15:24,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-18 00:15:24,251 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 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) [2022-03-18 00:15:24,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:15:24,325 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2022-03-18 00:15:24,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 00:15:24,326 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 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 17 [2022-03-18 00:15:24,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:15:24,326 INFO L225 Difference]: With dead ends: 29 [2022-03-18 00:15:24,326 INFO L226 Difference]: Without dead ends: 21 [2022-03-18 00:15:24,327 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-03-18 00:15:24,327 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:15:24,327 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 24 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:15:24,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-03-18 00:15:24,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2022-03-18 00:15:24,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:15:24,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2022-03-18 00:15:24,331 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 17 [2022-03-18 00:15:24,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:15:24,331 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2022-03-18 00:15:24,331 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 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) [2022-03-18 00:15:24,331 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2022-03-18 00:15:24,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-18 00:15:24,331 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:15:24,332 INFO L500 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:15:24,332 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-18 00:15:24,332 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:15:24,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:15:24,332 INFO L85 PathProgramCache]: Analyzing trace with hash 934170243, now seen corresponding path program 4 times [2022-03-18 00:15:24,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:24,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [700118780] [2022-03-18 00:15:24,479 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:15:24,479 INFO L85 PathProgramCache]: Analyzing trace with hash -408599798, now seen corresponding path program 1 times [2022-03-18 00:15:24,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:15:24,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963859638] [2022-03-18 00:15:24,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:15:24,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:15:24,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:24,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:15:24,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:24,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:15:24,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:15:24,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963859638] [2022-03-18 00:15:24,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963859638] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:15:24,524 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:15:24,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:15:24,596 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:15:24,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [700118780] [2022-03-18 00:15:24,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [700118780] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:15:24,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:15:24,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-18 00:15:24,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386025] [2022-03-18 00:15:24,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:15:24,597 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 00:15:24,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:24,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 00:15:24,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-18 00:15:24,598 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 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) [2022-03-18 00:15:24,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:15:24,710 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2022-03-18 00:15:24,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 00:15:24,710 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 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 [2022-03-18 00:15:24,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:15:24,711 INFO L225 Difference]: With dead ends: 30 [2022-03-18 00:15:24,711 INFO L226 Difference]: Without dead ends: 22 [2022-03-18 00:15:24,711 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-03-18 00:15:24,712 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:15:24,712 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 44 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:15:24,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-03-18 00:15:24,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2022-03-18 00:15:24,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 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) [2022-03-18 00:15:24,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2022-03-18 00:15:24,716 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 18 [2022-03-18 00:15:24,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:15:24,716 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2022-03-18 00:15:24,716 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 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) [2022-03-18 00:15:24,716 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2022-03-18 00:15:24,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-18 00:15:24,717 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:15:24,717 INFO L500 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:15:24,717 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-18 00:15:24,717 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:15:24,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:15:24,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1746706810, now seen corresponding path program 5 times [2022-03-18 00:15:24,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:24,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1032351700] [2022-03-18 00:15:24,852 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:15:24,853 INFO L85 PathProgramCache]: Analyzing trace with hash -349494454, now seen corresponding path program 1 times [2022-03-18 00:15:24,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:15:24,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777915106] [2022-03-18 00:15:24,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:15:24,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:15:24,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:24,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:15:24,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:24,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:15:24,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:15:24,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777915106] [2022-03-18 00:15:24,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777915106] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:15:24,917 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:15:24,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:15:24,985 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:15:24,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1032351700] [2022-03-18 00:15:24,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1032351700] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:15:24,986 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:15:24,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 00:15:24,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513113566] [2022-03-18 00:15:24,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:15:24,990 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 00:15:24,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:24,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 00:15:24,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-03-18 00:15:24,991 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 9 states have internal predecessors, (15), 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) [2022-03-18 00:15:25,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:15:25,076 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2022-03-18 00:15:25,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 00:15:25,077 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 9 states have internal predecessors, (15), 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 19 [2022-03-18 00:15:25,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:15:25,079 INFO L225 Difference]: With dead ends: 31 [2022-03-18 00:15:25,079 INFO L226 Difference]: Without dead ends: 23 [2022-03-18 00:15:25,080 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-03-18 00:15:25,080 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:15:25,081 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 19 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:15:25,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-03-18 00:15:25,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2022-03-18 00:15:25,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 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) [2022-03-18 00:15:25,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2022-03-18 00:15:25,088 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2022-03-18 00:15:25,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:15:25,088 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2022-03-18 00:15:25,089 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 9 states have internal predecessors, (15), 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) [2022-03-18 00:15:25,089 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2022-03-18 00:15:25,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-18 00:15:25,090 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:15:25,090 INFO L500 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:15:25,090 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-18 00:15:25,090 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:15:25,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:15:25,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1165536611, now seen corresponding path program 6 times [2022-03-18 00:15:25,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:25,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [534706418] [2022-03-18 00:15:25,223 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:15:25,223 INFO L85 PathProgramCache]: Analyzing trace with hash -290389110, now seen corresponding path program 1 times [2022-03-18 00:15:25,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:15:25,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368632581] [2022-03-18 00:15:25,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:15:25,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:15:25,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:25,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:15:25,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:25,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:15:25,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:15:25,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368632581] [2022-03-18 00:15:25,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368632581] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:15:25,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:15:25,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:15:25,345 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:15:25,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [534706418] [2022-03-18 00:15:25,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [534706418] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:15:25,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:15:25,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-18 00:15:25,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842980534] [2022-03-18 00:15:25,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:15:25,345 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-18 00:15:25,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:25,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-18 00:15:25,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-03-18 00:15:25,346 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 10 states have internal predecessors, (16), 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) [2022-03-18 00:15:25,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:15:25,472 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2022-03-18 00:15:25,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 00:15:25,472 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 10 states have internal predecessors, (16), 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 20 [2022-03-18 00:15:25,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:15:25,473 INFO L225 Difference]: With dead ends: 32 [2022-03-18 00:15:25,473 INFO L226 Difference]: Without dead ends: 24 [2022-03-18 00:15:25,473 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-03-18 00:15:25,473 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:15:25,474 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 44 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:15:25,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-03-18 00:15:25,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2022-03-18 00:15:25,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 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) [2022-03-18 00:15:25,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2022-03-18 00:15:25,477 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 20 [2022-03-18 00:15:25,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:15:25,477 INFO L478 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2022-03-18 00:15:25,477 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 10 states have internal predecessors, (16), 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) [2022-03-18 00:15:25,477 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2022-03-18 00:15:25,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-18 00:15:25,477 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:15:25,477 INFO L500 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:15:25,477 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-03-18 00:15:25,478 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:15:25,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:15:25,478 INFO L85 PathProgramCache]: Analyzing trace with hash 329129626, now seen corresponding path program 7 times [2022-03-18 00:15:25,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:25,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [78256477] [2022-03-18 00:15:25,632 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:15:25,633 INFO L85 PathProgramCache]: Analyzing trace with hash -231283766, now seen corresponding path program 1 times [2022-03-18 00:15:25,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:15:25,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613240895] [2022-03-18 00:15:25,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:15:25,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:15:25,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:25,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:15:25,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:25,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:15:25,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:15:25,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613240895] [2022-03-18 00:15:25,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613240895] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:15:25,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:15:25,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:15:25,788 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:15:25,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [78256477] [2022-03-18 00:15:25,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [78256477] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:15:25,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:15:25,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 00:15:25,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283997789] [2022-03-18 00:15:25,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:15:25,789 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 00:15:25,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:25,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 00:15:25,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-03-18 00:15:25,790 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 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) [2022-03-18 00:15:25,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:15:25,918 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2022-03-18 00:15:25,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 00:15:25,919 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 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 21 [2022-03-18 00:15:25,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:15:25,919 INFO L225 Difference]: With dead ends: 33 [2022-03-18 00:15:25,919 INFO L226 Difference]: Without dead ends: 25 [2022-03-18 00:15:25,920 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-03-18 00:15:25,920 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:15:25,921 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 24 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:15:25,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-03-18 00:15:25,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2022-03-18 00:15:25,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 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) [2022-03-18 00:15:25,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2022-03-18 00:15:25,925 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 21 [2022-03-18 00:15:25,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:15:25,925 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2022-03-18 00:15:25,925 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 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) [2022-03-18 00:15:25,925 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2022-03-18 00:15:25,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-18 00:15:25,926 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:15:25,926 INFO L500 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:15:25,926 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-03-18 00:15:25,926 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:15:25,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:15:25,926 INFO L85 PathProgramCache]: Analyzing trace with hash 170316867, now seen corresponding path program 8 times [2022-03-18 00:15:25,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:25,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1322921246] [2022-03-18 00:15:26,091 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:15:26,092 INFO L85 PathProgramCache]: Analyzing trace with hash -172178422, now seen corresponding path program 1 times [2022-03-18 00:15:26,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:15:26,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955242502] [2022-03-18 00:15:26,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:15:26,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:15:26,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:26,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:15:26,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:26,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:15:26,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:15:26,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955242502] [2022-03-18 00:15:26,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955242502] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:15:26,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:15:26,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:15:26,245 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:15:26,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1322921246] [2022-03-18 00:15:26,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1322921246] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:15:26,245 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:15:26,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-18 00:15:26,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932800234] [2022-03-18 00:15:26,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:15:26,246 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 00:15:26,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:26,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 00:15:26,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-03-18 00:15:26,246 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 12 states have internal predecessors, (18), 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) [2022-03-18 00:15:26,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:15:26,403 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-03-18 00:15:26,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-18 00:15:26,404 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 12 states have internal predecessors, (18), 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 22 [2022-03-18 00:15:26,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:15:26,404 INFO L225 Difference]: With dead ends: 34 [2022-03-18 00:15:26,404 INFO L226 Difference]: Without dead ends: 26 [2022-03-18 00:15:26,405 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-03-18 00:15:26,405 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:15:26,405 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 54 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:15:26,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-03-18 00:15:26,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2022-03-18 00:15:26,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 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) [2022-03-18 00:15:26,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2022-03-18 00:15:26,408 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 22 [2022-03-18 00:15:26,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:15:26,409 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2022-03-18 00:15:26,409 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 12 states have internal predecessors, (18), 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) [2022-03-18 00:15:26,409 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2022-03-18 00:15:26,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-18 00:15:26,409 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:15:26,409 INFO L500 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:15:26,409 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-03-18 00:15:26,409 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:15:26,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:15:26,410 INFO L85 PathProgramCache]: Analyzing trace with hash -457911366, now seen corresponding path program 9 times [2022-03-18 00:15:26,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:26,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [949328976] [2022-03-18 00:15:26,542 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:15:26,543 INFO L85 PathProgramCache]: Analyzing trace with hash -113073078, now seen corresponding path program 1 times [2022-03-18 00:15:26,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:15:26,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527533458] [2022-03-18 00:15:26,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:15:26,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:15:26,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:26,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:15:26,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:26,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:15:26,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:15:26,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527533458] [2022-03-18 00:15:26,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527533458] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:15:26,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:15:26,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:15:26,725 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:15:26,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [949328976] [2022-03-18 00:15:26,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [949328976] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:15:26,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:15:26,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-18 00:15:26,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595421178] [2022-03-18 00:15:26,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:15:26,726 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-18 00:15:26,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:26,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-18 00:15:26,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-03-18 00:15:26,727 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 13 states have internal predecessors, (19), 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) [2022-03-18 00:15:26,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:15:26,912 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2022-03-18 00:15:26,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-18 00:15:26,913 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 13 states have internal predecessors, (19), 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 23 [2022-03-18 00:15:26,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:15:26,913 INFO L225 Difference]: With dead ends: 35 [2022-03-18 00:15:26,913 INFO L226 Difference]: Without dead ends: 27 [2022-03-18 00:15:26,914 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2022-03-18 00:15:26,914 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:15:26,914 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 24 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:15:26,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-18 00:15:26,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2022-03-18 00:15:26,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 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) [2022-03-18 00:15:26,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2022-03-18 00:15:26,917 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 23 [2022-03-18 00:15:26,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:15:26,918 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2022-03-18 00:15:26,918 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 13 states have internal predecessors, (19), 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) [2022-03-18 00:15:26,918 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2022-03-18 00:15:26,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-18 00:15:26,918 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:15:26,918 INFO L500 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:15:26,918 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-03-18 00:15:26,918 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:15:26,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:15:26,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1541849891, now seen corresponding path program 10 times [2022-03-18 00:15:26,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:26,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [396228909] [2022-03-18 00:15:27,048 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:15:27,048 INFO L85 PathProgramCache]: Analyzing trace with hash -53967734, now seen corresponding path program 1 times [2022-03-18 00:15:27,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:15:27,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028355168] [2022-03-18 00:15:27,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:15:27,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:15:27,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:27,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:15:27,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:27,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:15:27,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:15:27,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028355168] [2022-03-18 00:15:27,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028355168] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:15:27,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:15:27,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:15:27,257 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:15:27,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [396228909] [2022-03-18 00:15:27,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [396228909] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:15:27,257 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:15:27,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-18 00:15:27,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987370103] [2022-03-18 00:15:27,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:15:27,258 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-18 00:15:27,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:27,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-18 00:15:27,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-03-18 00:15:27,258 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 16 states, 16 states have (on average 1.25) internal successors, (20), 15 states have internal predecessors, (20), 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) [2022-03-18 00:15:27,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:15:27,447 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2022-03-18 00:15:27,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-18 00:15:27,448 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.25) internal successors, (20), 15 states have internal predecessors, (20), 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 24 [2022-03-18 00:15:27,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:15:27,448 INFO L225 Difference]: With dead ends: 36 [2022-03-18 00:15:27,448 INFO L226 Difference]: Without dead ends: 28 [2022-03-18 00:15:27,449 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2022-03-18 00:15:27,449 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:15:27,450 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 28 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:15:27,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-03-18 00:15:27,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-03-18 00:15:27,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 states have internal predecessors, (25), 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) [2022-03-18 00:15:27,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2022-03-18 00:15:27,454 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 24 [2022-03-18 00:15:27,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:15:27,455 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2022-03-18 00:15:27,455 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.25) internal successors, (20), 15 states have internal predecessors, (20), 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) [2022-03-18 00:15:27,455 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2022-03-18 00:15:27,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-18 00:15:27,455 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:15:27,455 INFO L500 BasicCegarLoop]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:15:27,456 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-03-18 00:15:27,456 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:15:27,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:15:27,456 INFO L85 PathProgramCache]: Analyzing trace with hash -620876823, now seen corresponding path program 11 times [2022-03-18 00:15:27,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:27,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [897462473] [2022-03-18 00:15:27,887 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.ArrayIndexOutOfBoundsException: Index 0 out of bounds for length 0 at de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.qvasr.QvasrAbstractionJoin.removeLastColumnRational(QvasrAbstractionJoin.java:428) at de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.qvasr.QvasrAbstractionJoin.pushout(QvasrAbstractionJoin.java:181) at de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.qvasr.QvasrAbstractionJoin.join(QvasrAbstractionJoin.java:116) at de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.qvasr.QvasrSummarizer.summarizeLoop(QvasrSummarizer.java:130) at de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.qvasr.QvasrLoopSummarization.getQvasrAcceleration(QvasrLoopSummarization.java:87) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.loopaccelerator.AcceleratorQvasr.accelerateLoop(AcceleratorQvasr.java:91) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolationCore.acceleratedInterpolationCoreIsCorrect(AcceleratedInterpolationCore.java:246) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.(AcceleratedInterpolation.java:190) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleAcceleratedInterpolation.construct(IpTcStrategyModuleAcceleratedInterpolation.java:80) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:121) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:596) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:414) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:349) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:331) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:414) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:264) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:177) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:156) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-03-18 00:15:27,890 INFO L158 Benchmark]: Toolchain (without parser) took 5854.15ms. Allocated memory was 181.4MB in the beginning and 270.5MB in the end (delta: 89.1MB). Free memory was 132.5MB in the beginning and 195.0MB in the end (delta: -62.5MB). Peak memory consumption was 27.3MB. Max. memory is 8.0GB. [2022-03-18 00:15:27,890 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 181.4MB. Free memory was 149.1MB in the beginning and 148.9MB in the end (delta: 139.8kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-18 00:15:27,891 INFO L158 Benchmark]: CACSL2BoogieTranslator took 193.04ms. Allocated memory is still 181.4MB. Free memory was 132.3MB in the beginning and 158.5MB in the end (delta: -26.2MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-18 00:15:27,891 INFO L158 Benchmark]: Boogie Preprocessor took 35.45ms. Allocated memory is still 181.4MB. Free memory was 158.5MB in the beginning and 157.4MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-18 00:15:27,891 INFO L158 Benchmark]: RCFGBuilder took 256.68ms. Allocated memory is still 181.4MB. Free memory was 157.4MB in the beginning and 146.9MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-18 00:15:27,891 INFO L158 Benchmark]: TraceAbstraction took 5365.37ms. Allocated memory was 181.4MB in the beginning and 270.5MB in the end (delta: 89.1MB). Free memory was 146.4MB in the beginning and 195.0MB in the end (delta: -48.6MB). Peak memory consumption was 41.0MB. Max. memory is 8.0GB. [2022-03-18 00:15:27,892 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 181.4MB. Free memory was 149.1MB in the beginning and 148.9MB in the end (delta: 139.8kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 193.04ms. Allocated memory is still 181.4MB. Free memory was 132.3MB in the beginning and 158.5MB in the end (delta: -26.2MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 35.45ms. Allocated memory is still 181.4MB. Free memory was 158.5MB in the beginning and 157.4MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 256.68ms. Allocated memory is still 181.4MB. Free memory was 157.4MB in the beginning and 146.9MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 5365.37ms. Allocated memory was 181.4MB in the beginning and 270.5MB in the end (delta: 89.1MB). Free memory was 146.4MB in the beginning and 195.0MB in the end (delta: -48.6MB). Peak memory consumption was 41.0MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: ArrayIndexOutOfBoundsException: Index 0 out of bounds for length 0 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: ArrayIndexOutOfBoundsException: Index 0 out of bounds for length 0: de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.qvasr.QvasrAbstractionJoin.removeLastColumnRational(QvasrAbstractionJoin.java:428) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-03-18 00:15:27,919 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...