/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/loops/ludcmp.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 17:46:01,804 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 17:46:01,806 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 17:46:01,850 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 17:46:01,893 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 17:46:01,894 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 17:46:01,895 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 17:46:01,896 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-20 17:46:01,907 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 17:46:01,907 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 17:46:01,908 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 17:46:01,908 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 17:46:01,908 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 17:46:01,908 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 17:46:01,908 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 17:46:01,909 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 17:46:01,909 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 17:46:01,909 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 17:46:01,909 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 17:46:01,910 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 17:46:01,910 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 17:46:01,910 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 17:46:01,910 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 17:46:01,910 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 17:46:01,910 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 17:46:01,910 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 17:46:01,910 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 17:46:01,910 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 17:46:01,910 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 17:46:01,910 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-20 17:46:01,911 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 17:46:02,075 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 17:46:02,088 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 17:46:02,090 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 17:46:02,091 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 17:46:02,091 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 17:46:02,092 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/ludcmp.c [2022-03-20 17:46:02,134 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/beca318a6/4f7b510c9d04465bbe4e26c6836790dd/FLAG29b87d94c [2022-03-20 17:46:02,482 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 17:46:02,482 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/ludcmp.c [2022-03-20 17:46:02,489 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/beca318a6/4f7b510c9d04465bbe4e26c6836790dd/FLAG29b87d94c [2022-03-20 17:46:02,917 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/beca318a6/4f7b510c9d04465bbe4e26c6836790dd [2022-03-20 17:46:02,919 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 17:46:02,921 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 17:46:02,922 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 17:46:02,922 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 17:46:02,933 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 17:46:02,934 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 05:46:02" (1/1) ... [2022-03-20 17:46:02,934 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17d87722 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:46:02, skipping insertion in model container [2022-03-20 17:46:02,935 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 05:46:02" (1/1) ... [2022-03-20 17:46:02,940 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 17:46:02,961 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 17:46:03,111 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/ludcmp.c[318,331] [2022-03-20 17:46:03,164 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 17:46:03,174 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 17:46:03,183 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/ludcmp.c[318,331] [2022-03-20 17:46:03,212 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 17:46:03,224 INFO L208 MainTranslator]: Completed translation [2022-03-20 17:46:03,225 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:46:03 WrapperNode [2022-03-20 17:46:03,225 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 17:46:03,226 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 17:46:03,226 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 17:46:03,227 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 17:46:03,236 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:46:03" (1/1) ... [2022-03-20 17:46:03,236 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:46:03" (1/1) ... [2022-03-20 17:46:03,253 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:46:03" (1/1) ... [2022-03-20 17:46:03,253 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:46:03" (1/1) ... [2022-03-20 17:46:03,271 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:46:03" (1/1) ... [2022-03-20 17:46:03,275 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:46:03" (1/1) ... [2022-03-20 17:46:03,276 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:46:03" (1/1) ... [2022-03-20 17:46:03,278 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 17:46:03,287 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 17:46:03,287 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 17:46:03,287 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 17:46:03,288 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:46:03" (1/1) ... [2022-03-20 17:46:03,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 17:46:03,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:46:03,313 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 17:46:03,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 17:46:03,336 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 17:46:03,337 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 17:46:03,337 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 17:46:03,337 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 17:46:03,337 INFO L138 BoogieDeclarations]: Found implementation of procedure fabs [2022-03-20 17:46:03,337 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 17:46:03,337 INFO L138 BoogieDeclarations]: Found implementation of procedure ludcmp [2022-03-20 17:46:03,337 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 17:46:03,337 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 17:46:03,337 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 17:46:03,337 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 17:46:03,338 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 17:46:03,338 INFO L130 BoogieDeclarations]: Found specification of procedure ludcmp [2022-03-20 17:46:03,338 INFO L130 BoogieDeclarations]: Found specification of procedure fabs [2022-03-20 17:46:03,338 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 17:46:03,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2022-03-20 17:46:03,338 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2022-03-20 17:46:03,338 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-03-20 17:46:03,338 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 17:46:03,338 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 17:46:03,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 17:46:03,338 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 17:46:03,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 17:46:03,338 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 17:46:03,396 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 17:46:03,397 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 17:46:03,664 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 17:46:03,673 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 17:46:03,673 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2022-03-20 17:46:03,675 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 05:46:03 BoogieIcfgContainer [2022-03-20 17:46:03,675 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 17:46:03,677 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 17:46:03,677 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 17:46:03,679 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 17:46:03,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 05:46:02" (1/3) ... [2022-03-20 17:46:03,680 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21af75c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 05:46:03, skipping insertion in model container [2022-03-20 17:46:03,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:46:03" (2/3) ... [2022-03-20 17:46:03,681 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21af75c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 05:46:03, skipping insertion in model container [2022-03-20 17:46:03,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 05:46:03" (3/3) ... [2022-03-20 17:46:03,682 INFO L111 eAbstractionObserver]: Analyzing ICFG ludcmp.c [2022-03-20 17:46:03,686 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 17:46:03,686 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 17:46:03,728 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 17:46:03,734 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 17:46:03,734 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 17:46:03,749 INFO L276 IsEmpty]: Start isEmpty. Operand has 64 states, 52 states have (on average 1.5576923076923077) internal successors, (81), 53 states have internal predecessors, (81), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 17:46:03,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-20 17:46:03,755 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:03,755 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:46:03,755 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:03,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:03,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1448102218, now seen corresponding path program 1 times [2022-03-20 17:46:03,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:03,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2040037813] [2022-03-20 17:46:03,774 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:46:03,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1448102218, now seen corresponding path program 2 times [2022-03-20 17:46:03,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:03,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808673886] [2022-03-20 17:46:03,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:03,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:03,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:03,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:03,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:03,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:46:03,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:03,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808673886] [2022-03-20 17:46:03,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808673886] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:03,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:03,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 17:46:03,956 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:03,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2040037813] [2022-03-20 17:46:03,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2040037813] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:03,957 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:03,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 17:46:03,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045897694] [2022-03-20 17:46:03,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:03,960 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 17:46:03,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:03,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 17:46:03,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 17:46:03,980 INFO L87 Difference]: Start difference. First operand has 64 states, 52 states have (on average 1.5576923076923077) internal successors, (81), 53 states have internal predecessors, (81), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:46:04,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:46:04,181 INFO L93 Difference]: Finished difference Result 147 states and 225 transitions. [2022-03-20 17:46:04,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 17:46:04,183 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-20 17:46:04,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:46:04,188 INFO L225 Difference]: With dead ends: 147 [2022-03-20 17:46:04,188 INFO L226 Difference]: Without dead ends: 24 [2022-03-20 17:46:04,192 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 17:46:04,196 INFO L913 BasicCegarLoop]: 70 mSDtfsCounter, 38 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:46:04,197 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 73 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:46:04,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-03-20 17:46:04,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2022-03-20 17:46:04,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:46:04,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-03-20 17:46:04,232 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 12 [2022-03-20 17:46:04,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:46:04,232 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-03-20 17:46:04,232 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:46:04,233 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-03-20 17:46:04,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-20 17:46:04,234 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:04,234 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:46:04,234 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 17:46:04,234 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:04,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:04,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1436096445, now seen corresponding path program 1 times [2022-03-20 17:46:04,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:04,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2031191704] [2022-03-20 17:46:04,240 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:46:04,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1436096445, now seen corresponding path program 2 times [2022-03-20 17:46:04,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:04,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678778599] [2022-03-20 17:46:04,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:04,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:04,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:04,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:04,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:04,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:46:04,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:04,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678778599] [2022-03-20 17:46:04,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678778599] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:04,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:04,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 17:46:04,345 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:04,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2031191704] [2022-03-20 17:46:04,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2031191704] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:04,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:04,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 17:46:04,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113139494] [2022-03-20 17:46:04,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:04,346 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 17:46:04,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:04,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 17:46:04,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 17:46:04,347 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:46:04,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:46:04,412 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2022-03-20 17:46:04,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 17:46:04,413 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-20 17:46:04,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:46:04,413 INFO L225 Difference]: With dead ends: 40 [2022-03-20 17:46:04,414 INFO L226 Difference]: Without dead ends: 26 [2022-03-20 17:46:04,414 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-20 17:46:04,415 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 24 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 17:46:04,415 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 25 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 17:46:04,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-03-20 17:46:04,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2022-03-20 17:46:04,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:46:04,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-03-20 17:46:04,420 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 12 [2022-03-20 17:46:04,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:46:04,420 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-03-20 17:46:04,420 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:46:04,420 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-03-20 17:46:04,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-20 17:46:04,421 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:04,421 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:46:04,421 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 17:46:04,421 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:04,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:04,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1858105272, now seen corresponding path program 1 times [2022-03-20 17:46:04,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:04,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1230004159] [2022-03-20 17:46:04,428 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:46:04,428 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:46:04,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1858105272, now seen corresponding path program 2 times [2022-03-20 17:46:04,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:04,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404724509] [2022-03-20 17:46:04,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:04,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:04,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:04,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:04,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:04,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:46:04,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:04,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404724509] [2022-03-20 17:46:04,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404724509] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:46:04,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685080197] [2022-03-20 17:46:04,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:46:04,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:04,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:46:04,518 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:46:04,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 17:46:04,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:46:04,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:46:04,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 17:46:04,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:46:04,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:46:04,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:46:04,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:46:04,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685080197] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:46:04,743 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:46:04,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2022-03-20 17:46:04,744 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:04,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1230004159] [2022-03-20 17:46:04,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1230004159] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:04,744 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:04,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 17:46:04,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340646335] [2022-03-20 17:46:04,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:04,745 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 17:46:04,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:04,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 17:46:04,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-03-20 17:46:04,746 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 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) [2022-03-20 17:46:04,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:46:04,843 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2022-03-20 17:46:04,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 17:46:04,843 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 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 [2022-03-20 17:46:04,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:46:04,844 INFO L225 Difference]: With dead ends: 45 [2022-03-20 17:46:04,844 INFO L226 Difference]: Without dead ends: 30 [2022-03-20 17:46:04,845 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2022-03-20 17:46:04,851 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 31 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 17:46:04,852 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 28 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 17:46:04,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-20 17:46:04,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 25. [2022-03-20 17:46:04,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:46:04,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-03-20 17:46:04,864 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 16 [2022-03-20 17:46:04,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:46:04,864 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-03-20 17:46:04,864 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 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) [2022-03-20 17:46:04,865 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-03-20 17:46:04,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-20 17:46:04,865 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:04,865 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:46:04,883 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-20 17:46:05,079 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:05,079 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:05,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:05,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1949651507, now seen corresponding path program 3 times [2022-03-20 17:46:05,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:05,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1696865625] [2022-03-20 17:46:05,082 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:46:05,083 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:46:05,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1949651507, now seen corresponding path program 4 times [2022-03-20 17:46:05,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:05,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321132960] [2022-03-20 17:46:05,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:05,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:05,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:05,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:05,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:05,194 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:46:05,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:05,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321132960] [2022-03-20 17:46:05,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321132960] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:46:05,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231248678] [2022-03-20 17:46:05,195 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:46:05,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:05,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:46:05,197 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:46:05,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 17:46:05,254 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:46:05,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:46:05,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 17:46:05,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:46:05,362 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:46:05,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:46:05,425 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:46:05,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231248678] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:46:05,425 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:46:05,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2022-03-20 17:46:05,426 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:05,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1696865625] [2022-03-20 17:46:05,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1696865625] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:05,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:05,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 17:46:05,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98301717] [2022-03-20 17:46:05,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:05,432 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 17:46:05,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:05,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 17:46:05,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-03-20 17:46:05,433 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 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) [2022-03-20 17:46:05,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:46:05,529 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2022-03-20 17:46:05,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 17:46:05,529 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 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 [2022-03-20 17:46:05,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:46:05,530 INFO L225 Difference]: With dead ends: 57 [2022-03-20 17:46:05,530 INFO L226 Difference]: Without dead ends: 38 [2022-03-20 17:46:05,530 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-03-20 17:46:05,531 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 15 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:46:05,531 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 37 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:46:05,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-20 17:46:05,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2022-03-20 17:46:05,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:46:05,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2022-03-20 17:46:05,536 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 20 [2022-03-20 17:46:05,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:46:05,536 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2022-03-20 17:46:05,537 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 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) [2022-03-20 17:46:05,537 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2022-03-20 17:46:05,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-20 17:46:05,537 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:05,537 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:46:05,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 17:46:05,755 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-20 17:46:05,755 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:05,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:05,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1140304881, now seen corresponding path program 1 times [2022-03-20 17:46:05,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:05,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1136853003] [2022-03-20 17:46:05,758 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:46:05,758 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:46:05,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1140304881, now seen corresponding path program 2 times [2022-03-20 17:46:05,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:05,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290636940] [2022-03-20 17:46:05,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:05,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:05,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:05,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:05,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:05,830 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:46:05,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:05,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290636940] [2022-03-20 17:46:05,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290636940] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:46:05,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056563852] [2022-03-20 17:46:05,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:46:05,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:05,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:46:05,832 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:46:05,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 17:46:05,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:46:05,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:46:05,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 17:46:05,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:46:05,972 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:46:05,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:46:06,042 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:46:06,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056563852] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:46:06,043 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:46:06,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 15 [2022-03-20 17:46:06,043 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:06,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1136853003] [2022-03-20 17:46:06,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1136853003] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:06,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:06,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 17:46:06,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383946132] [2022-03-20 17:46:06,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:06,044 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 17:46:06,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:06,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 17:46:06,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2022-03-20 17:46:06,045 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 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) [2022-03-20 17:46:06,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:46:06,125 INFO L93 Difference]: Finished difference Result 68 states and 79 transitions. [2022-03-20 17:46:06,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 17:46:06,126 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 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 [2022-03-20 17:46:06,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:46:06,128 INFO L225 Difference]: With dead ends: 68 [2022-03-20 17:46:06,128 INFO L226 Difference]: Without dead ends: 49 [2022-03-20 17:46:06,128 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2022-03-20 17:46:06,129 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 34 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 17:46:06,129 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 34 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 17:46:06,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-03-20 17:46:06,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2022-03-20 17:46:06,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 37 states have (on average 1.162162162162162) internal successors, (43), 37 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:46:06,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2022-03-20 17:46:06,143 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 20 [2022-03-20 17:46:06,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:46:06,144 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2022-03-20 17:46:06,144 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 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) [2022-03-20 17:46:06,144 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2022-03-20 17:46:06,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-20 17:46:06,145 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:06,145 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:46:06,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 17:46:06,362 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:06,362 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:06,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:06,363 INFO L85 PathProgramCache]: Analyzing trace with hash -162258006, now seen corresponding path program 3 times [2022-03-20 17:46:06,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:06,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1038335982] [2022-03-20 17:46:06,367 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:46:06,367 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:46:06,367 INFO L85 PathProgramCache]: Analyzing trace with hash -162258006, now seen corresponding path program 4 times [2022-03-20 17:46:06,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:06,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311396095] [2022-03-20 17:46:06,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:06,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:06,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:06,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:06,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:06,466 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:46:06,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:06,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311396095] [2022-03-20 17:46:06,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311396095] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:46:06,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988457832] [2022-03-20 17:46:06,467 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:46:06,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:06,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:46:06,468 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:46:06,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 17:46:06,562 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:46:06,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:46:06,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 17:46:06,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:46:06,670 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:46:06,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:46:06,751 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:46:06,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988457832] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:46:06,751 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:46:06,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2022-03-20 17:46:06,751 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:06,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1038335982] [2022-03-20 17:46:06,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1038335982] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:06,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:06,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:46:06,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148025980] [2022-03-20 17:46:06,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:06,752 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 17:46:06,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:06,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 17:46:06,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2022-03-20 17:46:06,753 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 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) [2022-03-20 17:46:06,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:46:06,832 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2022-03-20 17:46:06,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 17:46:06,832 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 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 [2022-03-20 17:46:06,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:46:06,833 INFO L225 Difference]: With dead ends: 80 [2022-03-20 17:46:06,833 INFO L226 Difference]: Without dead ends: 57 [2022-03-20 17:46:06,833 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2022-03-20 17:46:06,836 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 41 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 17:46:06,837 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 42 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 17:46:06,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-03-20 17:46:06,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 51. [2022-03-20 17:46:06,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 45 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:46:06,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2022-03-20 17:46:06,847 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 24 [2022-03-20 17:46:06,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:46:06,847 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2022-03-20 17:46:06,847 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 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) [2022-03-20 17:46:06,847 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2022-03-20 17:46:06,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 17:46:06,848 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:06,848 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:46:06,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 17:46:07,067 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:07,068 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:07,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:07,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1312024861, now seen corresponding path program 5 times [2022-03-20 17:46:07,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:07,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [999604151] [2022-03-20 17:46:07,071 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:46:07,071 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:46:07,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1312024861, now seen corresponding path program 6 times [2022-03-20 17:46:07,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:07,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559575535] [2022-03-20 17:46:07,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:07,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:07,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:07,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:07,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:07,158 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:46:07,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:07,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559575535] [2022-03-20 17:46:07,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559575535] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:46:07,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332196735] [2022-03-20 17:46:07,159 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:46:07,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:07,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:46:07,160 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:46:07,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 17:46:07,231 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 17:46:07,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:46:07,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 17:46:07,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:46:07,360 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:46:07,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:46:07,443 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:46:07,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332196735] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:46:07,443 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:46:07,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 21 [2022-03-20 17:46:07,444 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:07,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [999604151] [2022-03-20 17:46:07,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [999604151] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:07,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:07,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 17:46:07,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962933479] [2022-03-20 17:46:07,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:07,444 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 17:46:07,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:07,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 17:46:07,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=270, Unknown=0, NotChecked=0, Total=420 [2022-03-20 17:46:07,445 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:46:07,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:46:07,525 INFO L93 Difference]: Finished difference Result 92 states and 107 transitions. [2022-03-20 17:46:07,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 17:46:07,527 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 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 28 [2022-03-20 17:46:07,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:46:07,528 INFO L225 Difference]: With dead ends: 92 [2022-03-20 17:46:07,528 INFO L226 Difference]: Without dead ends: 65 [2022-03-20 17:46:07,528 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2022-03-20 17:46:07,528 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 51 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 17:46:07,529 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 38 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 17:46:07,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-03-20 17:46:07,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 59. [2022-03-20 17:46:07,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 53 states have (on average 1.150943396226415) internal successors, (61), 53 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:46:07,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2022-03-20 17:46:07,535 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 28 [2022-03-20 17:46:07,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:46:07,535 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2022-03-20 17:46:07,536 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:46:07,536 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2022-03-20 17:46:07,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-20 17:46:07,536 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:07,536 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:46:07,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 17:46:07,754 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:07,754 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:07,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:07,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1026934172, now seen corresponding path program 7 times [2022-03-20 17:46:07,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:07,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1663010987] [2022-03-20 17:46:07,757 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:46:07,757 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:46:07,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1026934172, now seen corresponding path program 8 times [2022-03-20 17:46:07,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:07,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869544600] [2022-03-20 17:46:07,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:07,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:07,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:07,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:07,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:07,865 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:46:07,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:07,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869544600] [2022-03-20 17:46:07,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869544600] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:46:07,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713658048] [2022-03-20 17:46:07,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:46:07,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:07,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:46:07,867 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:46:07,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 17:46:07,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:46:07,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:46:07,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-20 17:46:07,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:46:08,054 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:46:08,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:46:08,146 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:46:08,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713658048] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:46:08,147 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:46:08,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2022-03-20 17:46:08,147 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:08,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1663010987] [2022-03-20 17:46:08,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1663010987] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:08,147 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:08,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 17:46:08,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691138876] [2022-03-20 17:46:08,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:08,148 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 17:46:08,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:08,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 17:46:08,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=336, Unknown=0, NotChecked=0, Total=506 [2022-03-20 17:46:08,148 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:46:08,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:46:08,239 INFO L93 Difference]: Finished difference Result 98 states and 114 transitions. [2022-03-20 17:46:08,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 17:46:08,240 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 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 32 [2022-03-20 17:46:08,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:46:08,240 INFO L225 Difference]: With dead ends: 98 [2022-03-20 17:46:08,240 INFO L226 Difference]: Without dead ends: 67 [2022-03-20 17:46:08,241 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2022-03-20 17:46:08,241 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 54 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 17:46:08,241 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 43 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 17:46:08,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-20 17:46:08,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-03-20 17:46:08,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 61 states have (on average 1.1475409836065573) internal successors, (70), 61 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:46:08,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 75 transitions. [2022-03-20 17:46:08,248 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 75 transitions. Word has length 32 [2022-03-20 17:46:08,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:46:08,248 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 75 transitions. [2022-03-20 17:46:08,248 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:46:08,249 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 75 transitions. [2022-03-20 17:46:08,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-20 17:46:08,249 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:08,249 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:46:08,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 17:46:08,462 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:08,462 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:08,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:08,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1975029803, now seen corresponding path program 9 times [2022-03-20 17:46:08,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:08,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1570804016] [2022-03-20 17:46:08,465 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:46:08,465 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:46:08,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1975029803, now seen corresponding path program 10 times [2022-03-20 17:46:08,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:08,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084284518] [2022-03-20 17:46:08,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:08,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:08,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 17:46:08,481 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 17:46:08,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 17:46:08,521 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 17:46:08,521 INFO L130 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found a feasible trace [2022-03-20 17:46:08,521 INFO L618 BasicCegarLoop]: Counterexample is feasible [2022-03-20 17:46:08,523 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 17:46:08,525 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-03-20 17:46:08,541 INFO L719 BasicCegarLoop]: Path program histogram: [10, 4, 2, 2] [2022-03-20 17:46:08,543 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 17:46:08,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 05:46:08 BoogieIcfgContainer [2022-03-20 17:46:08,553 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 17:46:08,553 INFO L158 Benchmark]: Toolchain (without parser) took 5632.73ms. Allocated memory was 196.1MB in the beginning and 253.8MB in the end (delta: 57.7MB). Free memory was 148.9MB in the beginning and 172.2MB in the end (delta: -23.3MB). Peak memory consumption was 35.3MB. Max. memory is 8.0GB. [2022-03-20 17:46:08,553 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 196.1MB. Free memory is still 165.6MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 17:46:08,554 INFO L158 Benchmark]: CACSL2BoogieTranslator took 303.78ms. Allocated memory is still 196.1MB. Free memory was 148.7MB in the beginning and 172.1MB in the end (delta: -23.4MB). Peak memory consumption was 10.8MB. Max. memory is 8.0GB. [2022-03-20 17:46:08,554 INFO L158 Benchmark]: Boogie Preprocessor took 52.42ms. Allocated memory is still 196.1MB. Free memory was 172.1MB in the beginning and 170.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-20 17:46:08,554 INFO L158 Benchmark]: RCFGBuilder took 388.20ms. Allocated memory is still 196.1MB. Free memory was 170.0MB in the beginning and 153.8MB in the end (delta: 16.2MB). Peak memory consumption was 16.8MB. Max. memory is 8.0GB. [2022-03-20 17:46:08,554 INFO L158 Benchmark]: TraceAbstraction took 4876.19ms. Allocated memory was 196.1MB in the beginning and 253.8MB in the end (delta: 57.7MB). Free memory was 153.5MB in the beginning and 172.2MB in the end (delta: -18.7MB). Peak memory consumption was 40.2MB. Max. memory is 8.0GB. [2022-03-20 17:46:08,555 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 196.1MB. Free memory is still 165.6MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 303.78ms. Allocated memory is still 196.1MB. Free memory was 148.7MB in the beginning and 172.1MB in the end (delta: -23.4MB). Peak memory consumption was 10.8MB. Max. memory is 8.0GB. * Boogie Preprocessor took 52.42ms. Allocated memory is still 196.1MB. Free memory was 172.1MB in the beginning and 170.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 388.20ms. Allocated memory is still 196.1MB. Free memory was 170.0MB in the beginning and 153.8MB in the end (delta: 16.2MB). Peak memory consumption was 16.8MB. Max. memory is 8.0GB. * TraceAbstraction took 4876.19ms. Allocated memory was 196.1MB in the beginning and 253.8MB in the end (delta: 57.7MB). Free memory was 153.5MB in the beginning and 172.2MB in the end (delta: -18.7MB). Peak memory consumption was 40.2MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 7]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of to_real at line 98, overapproximation of someBinaryArithmeticDOUBLEoperation at line 100. Possible FailurePath: [L71] double a[50][50], b[50], x[50]; [L88] int i, j, nmax = 50, n = 5, chkerr; [L89] double eps, w; [L91] eps = 1.0e-6 [L93] i = 0 [L93] COND TRUE i <= n [L95] w = 0.0 [L96] j = 0 [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) [L99] COND TRUE i == j [L99] EXPR a[i][j] [L99] a[i][j] *= 10.0 [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) [L99] COND FALSE !(i == j) [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) [L99] COND FALSE !(i == j) [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) [L99] COND FALSE !(i == j) [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) [L99] COND FALSE !(i == j) [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) [L99] COND FALSE !(i == j) [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ [L96] COND FALSE !(j <= n) [L102] CALL __VERIFIER_assert(i==2) [L6] COND TRUE !(cond) [L7] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 67 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 4.8s, OverallIterations: 9, TraceHistogramMax: 6, PathProgramHistogramMax: 10, EmptinessCheckTime: 0.0s, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 297 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 288 mSDsluCounter, 320 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 145 mSDsCounter, 75 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 454 IncrementalHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 75 mSolverCounterUnsat, 175 mSDtfsCounter, 454 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 351 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=67occurred in iteration=8, InterpolantAutomatonStates: 67, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 35 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-03-20 17:46:08,582 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...