/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/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/loop-acceleration/diamond_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 03:33:34,450 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 03:33:34,452 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 03:33:34,492 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 03:33:34,533 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 03:33:34,533 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 03:33:34,535 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 03:33:34,535 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-20 03:33:34,544 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 03:33:34,544 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 03:33:34,546 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 03:33:34,546 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 03:33:34,546 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 03:33:34,546 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 03:33:34,546 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 03:33:34,547 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 03:33:34,547 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 03:33:34,547 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 03:33:34,547 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 03:33:34,548 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 03:33:34,548 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 03:33:34,548 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 03:33:34,548 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 03:33:34,548 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 03:33:34,548 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 03:33:34,548 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 03:33:34,548 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 03:33:34,548 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 03:33:34,548 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 03:33:34,549 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 03:33:34,549 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 03:33:34,732 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 03:33:34,755 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 03:33:34,757 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 03:33:34,758 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 03:33:34,761 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 03:33:34,762 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/diamond_1-2.c [2022-03-20 03:33:34,823 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7310d2fa0/7d3c1f9f43f0485e8cf296d5c3a39d6d/FLAG122357535 [2022-03-20 03:33:35,210 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 03:33:35,210 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/diamond_1-2.c [2022-03-20 03:33:35,217 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7310d2fa0/7d3c1f9f43f0485e8cf296d5c3a39d6d/FLAG122357535 [2022-03-20 03:33:35,629 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7310d2fa0/7d3c1f9f43f0485e8cf296d5c3a39d6d [2022-03-20 03:33:35,632 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 03:33:35,634 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 03:33:35,635 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 03:33:35,635 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 03:33:35,638 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 03:33:35,642 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 03:33:35" (1/1) ... [2022-03-20 03:33:35,643 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@604373a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:33:35, skipping insertion in model container [2022-03-20 03:33:35,643 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 03:33:35" (1/1) ... [2022-03-20 03:33:35,648 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 03:33:35,656 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 03:33:35,815 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/diamond_1-2.c[373,386] [2022-03-20 03:33:35,827 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 03:33:35,834 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 03:33:35,845 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/diamond_1-2.c[373,386] [2022-03-20 03:33:35,847 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 03:33:35,859 INFO L208 MainTranslator]: Completed translation [2022-03-20 03:33:35,860 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:33:35 WrapperNode [2022-03-20 03:33:35,860 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 03:33:35,861 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 03:33:35,861 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 03:33:35,861 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 03:33:35,870 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:33:35" (1/1) ... [2022-03-20 03:33:35,870 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:33:35" (1/1) ... [2022-03-20 03:33:35,875 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:33:35" (1/1) ... [2022-03-20 03:33:35,875 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:33:35" (1/1) ... [2022-03-20 03:33:35,879 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:33:35" (1/1) ... [2022-03-20 03:33:35,882 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:33:35" (1/1) ... [2022-03-20 03:33:35,883 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:33:35" (1/1) ... [2022-03-20 03:33:35,884 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 03:33:35,885 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 03:33:35,885 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 03:33:35,885 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 03:33:35,886 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:33:35" (1/1) ... [2022-03-20 03:33:35,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 03:33:35,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:33:35,916 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 03:33:35,922 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 03:33:35,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 03:33:35,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 03:33:35,948 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 03:33:35,949 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 03:33:35,949 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 03:33:35,949 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 03:33:35,949 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 03:33:35,949 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 03:33:35,949 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 03:33:35,949 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-20 03:33:35,949 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 03:33:35,949 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 03:33:35,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 03:33:35,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 03:33:35,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 03:33:35,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 03:33:35,950 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 03:33:35,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 03:33:36,013 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 03:33:36,015 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 03:33:36,109 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 03:33:36,128 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 03:33:36,128 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 03:33:36,130 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 03:33:36 BoogieIcfgContainer [2022-03-20 03:33:36,130 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 03:33:36,131 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 03:33:36,131 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 03:33:36,132 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 03:33:36,135 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 03:33:36" (1/1) ... [2022-03-20 03:33:36,136 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-03-20 03:33:36,153 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 03:33:36 BasicIcfg [2022-03-20 03:33:36,153 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 03:33:36,154 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 03:33:36,154 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 03:33:36,156 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 03:33:36,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 03:33:35" (1/4) ... [2022-03-20 03:33:36,157 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3942e911 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 03:33:36, skipping insertion in model container [2022-03-20 03:33:36,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:33:35" (2/4) ... [2022-03-20 03:33:36,157 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3942e911 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 03:33:36, skipping insertion in model container [2022-03-20 03:33:36,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 03:33:36" (3/4) ... [2022-03-20 03:33:36,158 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3942e911 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 03:33:36, skipping insertion in model container [2022-03-20 03:33:36,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 03:33:36" (4/4) ... [2022-03-20 03:33:36,162 INFO L111 eAbstractionObserver]: Analyzing ICFG diamond_1-2.cJordan [2022-03-20 03:33:36,171 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-20 03:33:36,171 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 03:33:36,214 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 03:33:36,220 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, 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 03:33:36,221 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 03:33:36,250 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 03:33:36,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-20 03:33:36,255 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:33:36,256 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:33:36,257 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:33:36,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:33:36,261 INFO L85 PathProgramCache]: Analyzing trace with hash -756157467, now seen corresponding path program 1 times [2022-03-20 03:33:36,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:33:36,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422598197] [2022-03-20 03:33:36,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:33:36,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:33:36,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:33:36,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:33:36,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:33:36,425 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 03:33:36,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:33:36,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422598197] [2022-03-20 03:33:36,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422598197] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 03:33:36,427 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 03:33:36,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 03:33:36,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370286968] [2022-03-20 03:33:36,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 03:33:36,433 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 03:33:36,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:33:36,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 03:33:36,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 03:33:36,459 INFO L87 Difference]: Start difference. First operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:33:36,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:33:36,504 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2022-03-20 03:33:36,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 03:33:36,506 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-03-20 03:33:36,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:33:36,512 INFO L225 Difference]: With dead ends: 19 [2022-03-20 03:33:36,512 INFO L226 Difference]: Without dead ends: 13 [2022-03-20 03:33:36,513 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 03:33:36,517 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 11 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 03:33:36,518 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 22 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 03:33:36,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-03-20 03:33:36,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-03-20 03:33:36,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:33:36,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2022-03-20 03:33:36,554 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2022-03-20 03:33:36,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:33:36,554 INFO L478 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2022-03-20 03:33:36,555 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:33:36,555 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2022-03-20 03:33:36,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-20 03:33:36,555 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:33:36,555 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:33:36,555 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 03:33:36,556 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:33:36,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:33:36,556 INFO L85 PathProgramCache]: Analyzing trace with hash -755233946, now seen corresponding path program 1 times [2022-03-20 03:33:36,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:33:36,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929327478] [2022-03-20 03:33:36,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:33:36,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:33:36,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:33:36,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:33:36,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:33:36,678 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 03:33:36,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:33:36,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929327478] [2022-03-20 03:33:36,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929327478] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 03:33:36,679 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 03:33:36,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 03:33:36,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9426771] [2022-03-20 03:33:36,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 03:33:36,680 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 03:33:36,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:33:36,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 03:33:36,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 03:33:36,681 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:33:36,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:33:36,726 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2022-03-20 03:33:36,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 03:33:36,727 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-03-20 03:33:36,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:33:36,728 INFO L225 Difference]: With dead ends: 15 [2022-03-20 03:33:36,728 INFO L226 Difference]: Without dead ends: 15 [2022-03-20 03:33:36,729 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 03:33:36,730 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 03:33:36,730 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 18 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 03:33:36,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-03-20 03:33:36,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2022-03-20 03:33:36,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:33:36,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2022-03-20 03:33:36,734 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2022-03-20 03:33:36,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:33:36,734 INFO L478 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2022-03-20 03:33:36,734 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:33:36,734 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2022-03-20 03:33:36,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-20 03:33:36,734 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:33:36,735 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:33:36,735 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 03:33:36,735 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:33:36,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:33:36,735 INFO L85 PathProgramCache]: Analyzing trace with hash 980092676, now seen corresponding path program 1 times [2022-03-20 03:33:36,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:33:36,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934330208] [2022-03-20 03:33:36,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:33:36,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:33:36,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:33:36,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:33:36,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:33:36,850 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 03:33:36,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:33:36,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934330208] [2022-03-20 03:33:36,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934330208] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:33:36,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884668979] [2022-03-20 03:33:36,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:33:36,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:33:36,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:33:36,853 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 03:33:36,875 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 03:33:36,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:33:36,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 03:33:36,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:33:36,943 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 03:33:36,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:33:37,007 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 03:33:37,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884668979] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:33:37,008 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:33:37,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-20 03:33:37,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956545058] [2022-03-20 03:33:37,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:33:37,013 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 03:33:37,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:33:37,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 03:33:37,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-03-20 03:33:37,015 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:33:37,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:33:37,113 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2022-03-20 03:33:37,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 03:33:37,114 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-03-20 03:33:37,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:33:37,115 INFO L225 Difference]: With dead ends: 20 [2022-03-20 03:33:37,115 INFO L226 Difference]: Without dead ends: 20 [2022-03-20 03:33:37,116 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2022-03-20 03:33:37,119 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 14 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 03:33:37,121 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 28 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 03:33:37,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-03-20 03:33:37,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-03-20 03:33:37,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:33:37,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2022-03-20 03:33:37,131 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 13 [2022-03-20 03:33:37,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:33:37,132 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2022-03-20 03:33:37,132 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:33:37,133 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2022-03-20 03:33:37,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-20 03:33:37,133 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:33:37,133 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:33:37,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 03:33:37,344 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 03:33:37,344 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:33:37,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:33:37,345 INFO L85 PathProgramCache]: Analyzing trace with hash -341862240, now seen corresponding path program 1 times [2022-03-20 03:33:37,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:33:37,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132567566] [2022-03-20 03:33:37,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:33:37,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:33:37,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:33:37,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:33:37,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:33:37,450 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:33:37,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:33:37,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132567566] [2022-03-20 03:33:37,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132567566] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:33:37,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42994328] [2022-03-20 03:33:37,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:33:37,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:33:37,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:33:37,453 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 03:33:37,454 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 03:33:37,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:33:37,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 03:33:37,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:33:37,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:33:37,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:33:37,666 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:33:37,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42994328] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:33:37,667 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:33:37,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-03-20 03:33:37,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156097388] [2022-03-20 03:33:37,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:33:37,670 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 03:33:37,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:33:37,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 03:33:37,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-03-20 03:33:37,674 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:33:37,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:33:37,867 INFO L93 Difference]: Finished difference Result 31 states and 40 transitions. [2022-03-20 03:33:37,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 03:33:37,868 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-03-20 03:33:37,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:33:37,868 INFO L225 Difference]: With dead ends: 31 [2022-03-20 03:33:37,869 INFO L226 Difference]: Without dead ends: 31 [2022-03-20 03:33:37,869 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2022-03-20 03:33:37,870 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 19 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 03:33:37,870 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 28 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 03:33:37,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-03-20 03:33:37,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2022-03-20 03:33:37,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:33:37,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2022-03-20 03:33:37,873 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 15 [2022-03-20 03:33:37,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:33:37,873 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2022-03-20 03:33:37,873 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:33:37,873 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2022-03-20 03:33:37,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-20 03:33:37,874 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:33:37,874 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:33:37,892 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 03:33:38,083 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 03:33:38,084 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:33:38,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:33:38,084 INFO L85 PathProgramCache]: Analyzing trace with hash 265640572, now seen corresponding path program 2 times [2022-03-20 03:33:38,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:33:38,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768337808] [2022-03-20 03:33:38,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:33:38,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:33:38,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:33:38,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:33:38,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:33:38,199 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:33:38,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:33:38,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768337808] [2022-03-20 03:33:38,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768337808] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:33:38,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195740958] [2022-03-20 03:33:38,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 03:33:38,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:33:38,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:33:38,201 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 03:33:38,222 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 03:33:38,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 03:33:38,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 03:33:38,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 03:33:38,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:33:38,344 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:33:38,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:33:38,470 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:33:38,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195740958] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:33:38,470 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:33:38,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-03-20 03:33:38,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300889927] [2022-03-20 03:33:38,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:33:38,471 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 03:33:38,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:33:38,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 03:33:38,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2022-03-20 03:33:38,473 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:33:39,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:33:39,237 INFO L93 Difference]: Finished difference Result 66 states and 90 transitions. [2022-03-20 03:33:39,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 03:33:39,237 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-03-20 03:33:39,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:33:39,238 INFO L225 Difference]: With dead ends: 66 [2022-03-20 03:33:39,238 INFO L226 Difference]: Without dead ends: 66 [2022-03-20 03:33:39,239 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=233, Invalid=523, Unknown=0, NotChecked=0, Total=756 [2022-03-20 03:33:39,240 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 31 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 03:33:39,240 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 53 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 03:33:39,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-03-20 03:33:39,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 36. [2022-03-20 03:33:39,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.4193548387096775) internal successors, (44), 31 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:33:39,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 48 transitions. [2022-03-20 03:33:39,249 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 48 transitions. Word has length 21 [2022-03-20 03:33:39,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:33:39,249 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 48 transitions. [2022-03-20 03:33:39,250 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:33:39,250 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 48 transitions. [2022-03-20 03:33:39,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 03:33:39,250 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:33:39,250 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:33:39,272 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 03:33:39,467 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 03:33:39,468 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:33:39,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:33:39,468 INFO L85 PathProgramCache]: Analyzing trace with hash -819090412, now seen corresponding path program 2 times [2022-03-20 03:33:39,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:33:39,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727362442] [2022-03-20 03:33:39,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:33:39,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:33:39,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:33:39,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:33:39,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:33:39,563 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:33:39,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:33:39,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727362442] [2022-03-20 03:33:39,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727362442] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:33:39,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160811337] [2022-03-20 03:33:39,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 03:33:39,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:33:39,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:33:39,565 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 03:33:39,567 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 03:33:39,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 03:33:39,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 03:33:39,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 03:33:39,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:33:39,659 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:33:39,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:33:39,791 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:33:39,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160811337] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:33:39,791 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:33:39,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-03-20 03:33:39,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750917757] [2022-03-20 03:33:39,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:33:39,792 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 03:33:39,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:33:39,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 03:33:39,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2022-03-20 03:33:39,793 INFO L87 Difference]: Start difference. First operand 36 states and 48 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:33:40,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:33:40,634 INFO L93 Difference]: Finished difference Result 144 states and 205 transitions. [2022-03-20 03:33:40,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 03:33:40,634 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-03-20 03:33:40,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:33:40,635 INFO L225 Difference]: With dead ends: 144 [2022-03-20 03:33:40,636 INFO L226 Difference]: Without dead ends: 144 [2022-03-20 03:33:40,636 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=324, Invalid=732, Unknown=0, NotChecked=0, Total=1056 [2022-03-20 03:33:40,637 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 25 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 03:33:40,637 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 53 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 03:33:40,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-03-20 03:33:40,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 80. [2022-03-20 03:33:40,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 75 states have (on average 1.4666666666666666) internal successors, (110), 75 states have internal predecessors, (110), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:33:40,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 114 transitions. [2022-03-20 03:33:40,647 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 114 transitions. Word has length 23 [2022-03-20 03:33:40,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:33:40,647 INFO L478 AbstractCegarLoop]: Abstraction has 80 states and 114 transitions. [2022-03-20 03:33:40,647 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:33:40,648 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 114 transitions. [2022-03-20 03:33:40,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 03:33:40,648 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:33:40,649 INFO L499 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:33:40,674 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 03:33:40,868 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 03:33:40,868 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:33:40,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:33:40,869 INFO L85 PathProgramCache]: Analyzing trace with hash -382718831, now seen corresponding path program 1 times [2022-03-20 03:33:40,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:33:40,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717399671] [2022-03-20 03:33:40,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:33:40,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:33:40,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:33:40,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:33:40,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:33:40,912 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-03-20 03:33:40,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:33:40,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717399671] [2022-03-20 03:33:40,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717399671] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 03:33:40,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 03:33:40,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 03:33:40,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532033056] [2022-03-20 03:33:40,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 03:33:40,913 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 03:33:40,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:33:40,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 03:33:40,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 03:33:40,914 INFO L87 Difference]: Start difference. First operand 80 states and 114 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:33:40,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:33:40,939 INFO L93 Difference]: Finished difference Result 90 states and 105 transitions. [2022-03-20 03:33:40,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 03:33:40,940 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-03-20 03:33:40,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:33:40,944 INFO L225 Difference]: With dead ends: 90 [2022-03-20 03:33:40,944 INFO L226 Difference]: Without dead ends: 90 [2022-03-20 03:33:40,944 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 03:33:40,945 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 03:33:40,945 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 22 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 03:33:40,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-03-20 03:33:40,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 63. [2022-03-20 03:33:40,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.2758620689655173) internal successors, (74), 58 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:33:40,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 78 transitions. [2022-03-20 03:33:40,953 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 78 transitions. Word has length 29 [2022-03-20 03:33:40,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:33:40,953 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 78 transitions. [2022-03-20 03:33:40,953 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:33:40,953 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 78 transitions. [2022-03-20 03:33:40,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 03:33:40,954 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:33:40,954 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:33:40,954 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-20 03:33:40,954 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:33:40,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:33:40,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1436785103, now seen corresponding path program 2 times [2022-03-20 03:33:40,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:33:40,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507068334] [2022-03-20 03:33:40,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:33:40,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:33:40,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:33:40,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:33:40,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:33:40,978 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-03-20 03:33:40,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:33:40,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507068334] [2022-03-20 03:33:40,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507068334] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 03:33:40,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 03:33:40,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 03:33:40,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025137079] [2022-03-20 03:33:40,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 03:33:40,979 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 03:33:40,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:33:40,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 03:33:40,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 03:33:40,979 INFO L87 Difference]: Start difference. First operand 63 states and 78 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:33:40,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:33:40,994 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2022-03-20 03:33:40,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 03:33:40,994 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-03-20 03:33:40,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:33:40,995 INFO L225 Difference]: With dead ends: 64 [2022-03-20 03:33:40,995 INFO L226 Difference]: Without dead ends: 64 [2022-03-20 03:33:40,995 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 03:33:40,996 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 9 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 03:33:40,996 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 24 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 03:33:40,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-03-20 03:33:40,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2022-03-20 03:33:40,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 58 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:33:40,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2022-03-20 03:33:40,999 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 33 [2022-03-20 03:33:40,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:33:40,999 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2022-03-20 03:33:40,999 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:33:41,000 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2022-03-20 03:33:41,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-20 03:33:41,000 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:33:41,000 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:33:41,000 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-03-20 03:33:41,000 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:33:41,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:33:41,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1063807026, now seen corresponding path program 3 times [2022-03-20 03:33:41,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:33:41,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811459874] [2022-03-20 03:33:41,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:33:41,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:33:41,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:33:41,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:33:41,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:33:41,225 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:33:41,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:33:41,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811459874] [2022-03-20 03:33:41,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811459874] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:33:41,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117588831] [2022-03-20 03:33:41,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 03:33:41,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:33:41,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:33:41,228 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 03:33:41,229 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 03:33:41,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-03-20 03:33:41,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 03:33:41,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-20 03:33:41,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:33:41,551 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:33:41,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:33:41,688 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-20 03:33:41,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117588831] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:33:41,688 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:33:41,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 7] total 22 [2022-03-20 03:33:41,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630738285] [2022-03-20 03:33:41,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:33:41,689 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 03:33:41,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:33:41,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 03:33:41,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-03-20 03:33:41,690 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:33:42,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:33:42,394 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2022-03-20 03:33:42,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-20 03:33:42,394 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-03-20 03:33:42,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:33:42,395 INFO L225 Difference]: With dead ends: 72 [2022-03-20 03:33:42,395 INFO L226 Difference]: Without dead ends: 69 [2022-03-20 03:33:42,395 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=253, Invalid=1817, Unknown=0, NotChecked=0, Total=2070 [2022-03-20 03:33:42,396 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 46 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 03:33:42,396 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 103 Invalid, 809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 761 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 03:33:42,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-03-20 03:33:42,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 65. [2022-03-20 03:33:42,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.05) internal successors, (63), 60 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:33:42,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2022-03-20 03:33:42,399 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 35 [2022-03-20 03:33:42,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:33:42,400 INFO L478 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2022-03-20 03:33:42,400 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:33:42,400 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2022-03-20 03:33:42,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-20 03:33:42,400 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:33:42,401 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:33:42,408 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 03:33:42,605 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:33:42,606 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:33:42,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:33:42,606 INFO L85 PathProgramCache]: Analyzing trace with hash 794106220, now seen corresponding path program 4 times [2022-03-20 03:33:42,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:33:42,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741626644] [2022-03-20 03:33:42,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:33:42,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:33:42,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:33:42,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:33:42,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:33:42,866 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:33:42,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:33:42,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741626644] [2022-03-20 03:33:42,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741626644] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:33:42,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144470766] [2022-03-20 03:33:42,867 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 03:33:42,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:33:42,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:33:42,888 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 03:33:42,931 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 03:33:42,985 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 03:33:42,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 03:33:43,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-20 03:33:43,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:33:43,355 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:33:43,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:33:45,383 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:33:45,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144470766] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:33:45,384 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:33:45,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 32 [2022-03-20 03:33:45,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024467428] [2022-03-20 03:33:45,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:33:45,385 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-20 03:33:45,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:33:45,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-20 03:33:45,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=707, Unknown=0, NotChecked=0, Total=992 [2022-03-20 03:33:45,386 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:33:53,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:33:53,242 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2022-03-20 03:33:53,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-20 03:33:53,243 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-03-20 03:33:53,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:33:53,244 INFO L225 Difference]: With dead ends: 98 [2022-03-20 03:33:53,244 INFO L226 Difference]: Without dead ends: 98 [2022-03-20 03:33:53,245 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=985, Invalid=2555, Unknown=0, NotChecked=0, Total=3540 [2022-03-20 03:33:53,246 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 46 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 03:33:53,246 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 88 Invalid, 749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 03:33:53,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-03-20 03:33:53,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2022-03-20 03:33:53,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.0326086956521738) internal successors, (95), 92 states have internal predecessors, (95), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:33:53,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2022-03-20 03:33:53,252 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 37 [2022-03-20 03:33:53,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:33:53,252 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2022-03-20 03:33:53,252 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:33:53,253 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2022-03-20 03:33:53,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-20 03:33:53,254 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:33:53,255 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:33:53,284 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 03:33:53,483 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:33:53,484 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:33:53,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:33:53,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1208240388, now seen corresponding path program 3 times [2022-03-20 03:33:53,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:33:53,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912484625] [2022-03-20 03:33:53,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:33:53,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:33:53,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:33:54,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:33:54,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:33:54,017 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:33:54,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:33:54,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912484625] [2022-03-20 03:33:54,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912484625] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:33:54,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545202938] [2022-03-20 03:33:54,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 03:33:54,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:33:54,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:33:54,024 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 03:33:54,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 03:33:54,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-03-20 03:33:54,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 03:33:54,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-20 03:33:54,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:33:54,485 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:33:54,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:33:55,182 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:33:55,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545202938] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:33:55,182 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:33:55,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 20] total 37 [2022-03-20 03:33:55,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135079756] [2022-03-20 03:33:55,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:33:55,183 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-20 03:33:55,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:33:55,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-20 03:33:55,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=1005, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 03:33:55,184 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand has 37 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:34:29,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:34:29,049 INFO L93 Difference]: Finished difference Result 133 states and 149 transitions. [2022-03-20 03:34:29,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-20 03:34:29,050 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-03-20 03:34:29,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:34:29,050 INFO L225 Difference]: With dead ends: 133 [2022-03-20 03:34:29,050 INFO L226 Difference]: Without dead ends: 129 [2022-03-20 03:34:29,052 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 838 ImplicationChecksByTransitivity, 32.5s TimeCoverageRelationStatistics Valid=1222, Invalid=3890, Unknown=0, NotChecked=0, Total=5112 [2022-03-20 03:34:29,052 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 149 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-20 03:34:29,052 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 116 Invalid, 958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 765 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-03-20 03:34:29,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-03-20 03:34:29,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2022-03-20 03:34:29,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 124 states have (on average 1.0241935483870968) internal successors, (127), 124 states have internal predecessors, (127), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:34:29,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 131 transitions. [2022-03-20 03:34:29,059 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 131 transitions. Word has length 39 [2022-03-20 03:34:29,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:34:29,059 INFO L478 AbstractCegarLoop]: Abstraction has 129 states and 131 transitions. [2022-03-20 03:34:29,059 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:34:29,059 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 131 transitions. [2022-03-20 03:34:29,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-20 03:34:29,061 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:34:29,061 INFO L499 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:34:29,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 03:34:29,265 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:34:29,268 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:34:29,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:34:29,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1642006708, now seen corresponding path program 5 times [2022-03-20 03:34:29,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:34:29,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424232364] [2022-03-20 03:34:29,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:34:29,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:34:29,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:34:29,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:34:29,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:34:29,835 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:34:29,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:34:29,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424232364] [2022-03-20 03:34:29,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424232364] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:34:29,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917174060] [2022-03-20 03:34:29,835 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 03:34:29,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:34:29,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:34:29,836 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 03:34:29,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 03:34:44,365 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2022-03-20 03:34:44,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 03:34:44,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 61 conjunts are in the unsatisfiable core [2022-03-20 03:34:44,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:34:44,659 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:34:44,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:34:46,210 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:34:46,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917174060] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:34:46,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:34:46,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 64 [2022-03-20 03:34:46,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797915949] [2022-03-20 03:34:46,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:34:46,212 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-03-20 03:34:46,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:34:46,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-03-20 03:34:46,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1085, Invalid=2947, Unknown=0, NotChecked=0, Total=4032 [2022-03-20 03:34:46,214 INFO L87 Difference]: Start difference. First operand 129 states and 131 transitions. Second operand has 64 states, 64 states have (on average 2.0) internal successors, (128), 63 states have internal predecessors, (128), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:38:41,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:38:41,962 INFO L93 Difference]: Finished difference Result 194 states and 196 transitions. [2022-03-20 03:38:41,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-20 03:38:41,962 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.0) internal successors, (128), 63 states have internal predecessors, (128), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-03-20 03:38:41,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:38:41,963 INFO L225 Difference]: With dead ends: 194 [2022-03-20 03:38:41,963 INFO L226 Difference]: Without dead ends: 194 [2022-03-20 03:38:41,967 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2090 ImplicationChecksByTransitivity, 235.7s TimeCoverageRelationStatistics Valid=4022, Invalid=11227, Unknown=3, NotChecked=0, Total=15252 [2022-03-20 03:38:41,968 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 90 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 2508 mSolverCounterSat, 434 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 2942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 434 IncrementalHoareTripleChecker+Valid, 2508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-20 03:38:41,968 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 173 Invalid, 2942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [434 Valid, 2508 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-20 03:38:41,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-03-20 03:38:41,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 193. [2022-03-20 03:38:41,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 188 states have (on average 1.0159574468085106) internal successors, (191), 188 states have internal predecessors, (191), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:38:41,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 195 transitions. [2022-03-20 03:38:41,973 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 195 transitions. Word has length 69 [2022-03-20 03:38:41,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:38:41,973 INFO L478 AbstractCegarLoop]: Abstraction has 193 states and 195 transitions. [2022-03-20 03:38:41,974 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.0) internal successors, (128), 63 states have internal predecessors, (128), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:38:41,974 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 195 transitions. [2022-03-20 03:38:41,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-20 03:38:41,975 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:38:41,975 INFO L499 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:38:41,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 03:38:42,175 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-20 03:38:42,176 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:38:42,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:38:42,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1425056564, now seen corresponding path program 4 times [2022-03-20 03:38:42,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:38:42,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261913214] [2022-03-20 03:38:42,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:38:42,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:38:42,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:38:42,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:38:42,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:38:42,810 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:38:42,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:38:42,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261913214] [2022-03-20 03:38:42,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261913214] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:38:42,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060159755] [2022-03-20 03:38:42,811 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 03:38:42,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:38:42,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:38:42,812 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 03:38:42,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 03:38:42,900 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 03:38:42,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 03:38:42,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 63 conjunts are in the unsatisfiable core [2022-03-20 03:38:42,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:38:43,144 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:38:43,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:38:44,488 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:38:44,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060159755] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:38:44,489 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:38:44,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 66 [2022-03-20 03:38:44,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200990876] [2022-03-20 03:38:44,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:38:44,489 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-03-20 03:38:44,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:38:44,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-03-20 03:38:44,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1075, Invalid=3215, Unknown=0, NotChecked=0, Total=4290 [2022-03-20 03:38:44,491 INFO L87 Difference]: Start difference. First operand 193 states and 195 transitions. Second operand has 66 states, 66 states have (on average 2.0) internal successors, (132), 65 states have internal predecessors, (132), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:39:49,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:39:49,481 INFO L93 Difference]: Finished difference Result 233 states and 235 transitions. [2022-03-20 03:39:49,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-20 03:39:49,481 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.0) internal successors, (132), 65 states have internal predecessors, (132), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2022-03-20 03:39:49,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:39:49,482 INFO L225 Difference]: With dead ends: 233 [2022-03-20 03:39:49,482 INFO L226 Difference]: Without dead ends: 233 [2022-03-20 03:39:49,485 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2685 ImplicationChecksByTransitivity, 65.1s TimeCoverageRelationStatistics Valid=4085, Invalid=12170, Unknown=1, NotChecked=0, Total=16256 [2022-03-20 03:39:49,486 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 84 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 1871 mSolverCounterSat, 607 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 2478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 607 IncrementalHoareTripleChecker+Valid, 1871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-20 03:39:49,486 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 168 Invalid, 2478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [607 Valid, 1871 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-20 03:39:49,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-03-20 03:39:49,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 233. [2022-03-20 03:39:49,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 228 states have (on average 1.013157894736842) internal successors, (231), 228 states have internal predecessors, (231), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:39:49,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 235 transitions. [2022-03-20 03:39:49,491 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 235 transitions. Word has length 71 [2022-03-20 03:39:49,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:39:49,491 INFO L478 AbstractCegarLoop]: Abstraction has 233 states and 235 transitions. [2022-03-20 03:39:49,491 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.0) internal successors, (132), 65 states have internal predecessors, (132), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:39:49,491 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 235 transitions. [2022-03-20 03:39:49,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-03-20 03:39:49,492 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:39:49,492 INFO L499 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:39:49,520 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-03-20 03:39:49,706 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-20 03:39:49,706 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:39:49,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:39:49,707 INFO L85 PathProgramCache]: Analyzing trace with hash 843717136, now seen corresponding path program 5 times [2022-03-20 03:39:49,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:39:49,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117364604] [2022-03-20 03:39:49,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:39:49,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:39:49,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 03:39:49,763 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 03:39:49,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 03:39:49,818 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 03:39:49,818 INFO L618 BasicCegarLoop]: Counterexample is feasible [2022-03-20 03:39:49,819 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 03:39:49,820 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-03-20 03:39:49,822 INFO L719 BasicCegarLoop]: Path program histogram: [5, 5, 2, 1, 1] [2022-03-20 03:39:49,825 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 03:39:49,879 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 03:39:49 BasicIcfg [2022-03-20 03:39:49,879 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 03:39:49,879 INFO L158 Benchmark]: Toolchain (without parser) took 374245.61ms. Allocated memory was 182.5MB in the beginning and 219.2MB in the end (delta: 36.7MB). Free memory was 130.0MB in the beginning and 93.3MB in the end (delta: 36.7MB). Peak memory consumption was 74.7MB. Max. memory is 8.0GB. [2022-03-20 03:39:49,879 INFO L158 Benchmark]: CDTParser took 0.67ms. Allocated memory is still 182.5MB. Free memory is still 146.5MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 03:39:49,879 INFO L158 Benchmark]: CACSL2BoogieTranslator took 224.98ms. Allocated memory is still 182.5MB. Free memory was 129.9MB in the beginning and 158.9MB in the end (delta: -29.0MB). Peak memory consumption was 11.7MB. Max. memory is 8.0GB. [2022-03-20 03:39:49,879 INFO L158 Benchmark]: Boogie Preprocessor took 23.82ms. Allocated memory is still 182.5MB. Free memory was 158.9MB in the beginning and 157.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-20 03:39:49,880 INFO L158 Benchmark]: RCFGBuilder took 245.16ms. Allocated memory is still 182.5MB. Free memory was 157.3MB in the beginning and 147.5MB in the end (delta: 9.8MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-20 03:39:49,880 INFO L158 Benchmark]: IcfgTransformer took 22.04ms. Allocated memory is still 182.5MB. Free memory was 147.5MB in the beginning and 146.5MB in the end (delta: 1.1MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 03:39:49,880 INFO L158 Benchmark]: TraceAbstraction took 373724.75ms. Allocated memory was 182.5MB in the beginning and 219.2MB in the end (delta: 36.7MB). Free memory was 145.9MB in the beginning and 93.3MB in the end (delta: 52.6MB). Peak memory consumption was 90.2MB. Max. memory is 8.0GB. [2022-03-20 03:39:49,881 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.67ms. Allocated memory is still 182.5MB. Free memory is still 146.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 224.98ms. Allocated memory is still 182.5MB. Free memory was 129.9MB in the beginning and 158.9MB in the end (delta: -29.0MB). Peak memory consumption was 11.7MB. Max. memory is 8.0GB. * Boogie Preprocessor took 23.82ms. Allocated memory is still 182.5MB. Free memory was 158.9MB in the beginning and 157.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 245.16ms. Allocated memory is still 182.5MB. Free memory was 157.3MB in the beginning and 147.5MB in the end (delta: 9.8MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * IcfgTransformer took 22.04ms. Allocated memory is still 182.5MB. Free memory was 147.5MB in the beginning and 146.5MB in the end (delta: 1.1MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 373724.75ms. Allocated memory was 182.5MB in the beginning and 219.2MB in the end (delta: 36.7MB). Free memory was 145.9MB in the beginning and 93.3MB in the end (delta: 52.6MB). Peak memory consumption was 90.2MB. 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 - CounterExampleResult [Line: 8]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L14] unsigned int x = 0; [L15] unsigned int y = __VERIFIER_nondet_uint(); [L17] COND TRUE x < 99 VAL [x=0, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=2, y=4294967295] [L17] COND TRUE x < 99 VAL [x=2, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=4, y=4294967295] [L17] COND TRUE x < 99 VAL [x=4, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=6, y=4294967295] [L17] COND TRUE x < 99 VAL [x=6, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=8, y=4294967295] [L17] COND TRUE x < 99 VAL [x=8, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=10, y=4294967295] [L17] COND TRUE x < 99 VAL [x=10, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=12, y=4294967295] [L17] COND TRUE x < 99 VAL [x=12, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=14, y=4294967295] [L17] COND TRUE x < 99 VAL [x=14, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=16, y=4294967295] [L17] COND TRUE x < 99 VAL [x=16, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=18, y=4294967295] [L17] COND TRUE x < 99 VAL [x=18, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=20, y=4294967295] [L17] COND TRUE x < 99 VAL [x=20, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=22, y=4294967295] [L17] COND TRUE x < 99 VAL [x=22, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=24, y=4294967295] [L17] COND TRUE x < 99 VAL [x=24, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=26, y=4294967295] [L17] COND TRUE x < 99 VAL [x=26, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=28, y=4294967295] [L17] COND TRUE x < 99 VAL [x=28, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=30, y=4294967295] [L17] COND TRUE x < 99 VAL [x=30, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=32, y=4294967295] [L17] COND TRUE x < 99 VAL [x=32, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=34, y=4294967295] [L17] COND TRUE x < 99 VAL [x=34, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=36, y=4294967295] [L17] COND TRUE x < 99 VAL [x=36, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=38, y=4294967295] [L17] COND TRUE x < 99 VAL [x=38, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=40, y=4294967295] [L17] COND TRUE x < 99 VAL [x=40, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=42, y=4294967295] [L17] COND TRUE x < 99 VAL [x=42, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=44, y=4294967295] [L17] COND TRUE x < 99 VAL [x=44, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=46, y=4294967295] [L17] COND TRUE x < 99 VAL [x=46, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=48, y=4294967295] [L17] COND TRUE x < 99 VAL [x=48, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=50, y=4294967295] [L17] COND TRUE x < 99 VAL [x=50, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=52, y=4294967295] [L17] COND TRUE x < 99 VAL [x=52, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=54, y=4294967295] [L17] COND TRUE x < 99 VAL [x=54, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=56, y=4294967295] [L17] COND TRUE x < 99 VAL [x=56, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=58, y=4294967295] [L17] COND TRUE x < 99 VAL [x=58, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=60, y=4294967295] [L17] COND TRUE x < 99 VAL [x=60, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=62, y=4294967295] [L17] COND TRUE x < 99 VAL [x=62, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=64, y=4294967295] [L17] COND TRUE x < 99 VAL [x=64, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=66, y=4294967295] [L17] COND TRUE x < 99 VAL [x=66, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=68, y=4294967295] [L17] COND TRUE x < 99 VAL [x=68, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=70, y=4294967295] [L17] COND TRUE x < 99 VAL [x=70, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=72, y=4294967295] [L17] COND TRUE x < 99 VAL [x=72, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=74, y=4294967295] [L17] COND TRUE x < 99 VAL [x=74, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=76, y=4294967295] [L17] COND TRUE x < 99 VAL [x=76, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=78, y=4294967295] [L17] COND TRUE x < 99 VAL [x=78, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=80, y=4294967295] [L17] COND TRUE x < 99 VAL [x=80, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=82, y=4294967295] [L17] COND TRUE x < 99 VAL [x=82, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=84, y=4294967295] [L17] COND TRUE x < 99 VAL [x=84, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=86, y=4294967295] [L17] COND TRUE x < 99 VAL [x=86, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=88, y=4294967295] [L17] COND TRUE x < 99 VAL [x=88, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=90, y=4294967295] [L17] COND TRUE x < 99 VAL [x=90, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=92, y=4294967295] [L17] COND TRUE x < 99 VAL [x=92, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=94, y=4294967295] [L17] COND TRUE x < 99 VAL [x=94, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=96, y=4294967295] [L17] COND TRUE x < 99 VAL [x=96, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=98, y=4294967295] [L17] COND TRUE x < 99 VAL [x=98, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=100, y=4294967295] [L17] COND FALSE !(x < 99) VAL [x=100, y=4294967295] [L25] CALL __VERIFIER_assert((x % 2) == (y % 2)) VAL [\old(cond)=0] [L7] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L8] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 373.6s, OverallIterations: 14, TraceHistogramMax: 50, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 345.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 545 SdHoareTripleChecker+Valid, 6.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 544 mSDsluCounter, 896 SdHoareTripleChecker+Invalid, 6.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 737 mSDsCounter, 1617 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 7047 IncrementalHoareTripleChecker+Invalid, 8664 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1617 mSolverCounterUnsat, 159 mSDtfsCounter, 7047 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1075 GetRequests, 554 SyntacticMatches, 9 SemanticMatches, 512 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6660 ImplicationChecksByTransitivity, 344.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=233occurred in iteration=13, InterpolantAutomatonStates: 289, 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, 13 MinimizatonAttempts, 136 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 15.1s SatisfiabilityAnalysisTime, 10.5s InterpolantComputationTime, 841 NumberOfCodeBlocks, 841 NumberOfCodeBlocksAsserted, 82 NumberOfCheckSat, 1022 ConstructedInterpolants, 0 QuantifiedInterpolants, 5490 SizeOfPredicates, 10 NumberOfNonLiveVariables, 985 ConjunctsInSsa, 258 ConjunctsInUnsatCore, 31 InterpolantComputations, 4 PerfectInterpolantSequences, 262/7150 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-03-20 03:39:49,904 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...