/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-simple/deep-nested.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-18 18:04:02,807 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 18:04:02,809 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 18:04:02,843 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-18 18:04:02,880 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-18 18:04:02,886 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 18:04:02,887 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 18:04:02,888 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 18:04:02,888 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-18 18:04:02,888 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 18:04:02,888 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-18 18:04:02,888 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 18:04:02,888 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 18:04:02,888 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 18:04:02,888 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 18:04:02,888 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-18 18:04:02,889 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 18:04:02,889 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 18:04:02,889 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 18:04:02,889 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 18:04:02,889 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 18:04:02,889 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 18:04:02,889 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 18:04:02,889 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 18:04:02,890 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 18:04:02,890 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 18:04:02,890 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-18 18:04:02,890 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 18:04:03,044 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 18:04:03,062 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 18:04:03,064 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 18:04:03,064 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 18:04:03,065 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 18:04:03,067 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-simple/deep-nested.c [2022-03-18 18:04:03,132 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa148fbf5/d2aa8ca827bf4e049859aebe7b96f965/FLAGf21b89676 [2022-03-18 18:04:03,463 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 18:04:03,463 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-simple/deep-nested.c [2022-03-18 18:04:03,468 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa148fbf5/d2aa8ca827bf4e049859aebe7b96f965/FLAGf21b89676 [2022-03-18 18:04:03,903 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa148fbf5/d2aa8ca827bf4e049859aebe7b96f965 [2022-03-18 18:04:03,904 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 18:04:03,905 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-18 18:04:03,906 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 18:04:03,906 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 18:04:03,920 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 18:04:03,920 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 06:04:03" (1/1) ... [2022-03-18 18:04:03,921 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7229df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 06:04:03, skipping insertion in model container [2022-03-18 18:04:03,921 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 06:04:03" (1/1) ... [2022-03-18 18:04:03,926 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 18:04:03,936 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 18:04:04,046 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-simple/deep-nested.c[625,638] [2022-03-18 18:04:04,050 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 18:04:04,055 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 18:04:04,065 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-simple/deep-nested.c[625,638] [2022-03-18 18:04:04,066 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 18:04:04,075 INFO L208 MainTranslator]: Completed translation [2022-03-18 18:04:04,075 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 06:04:04 WrapperNode [2022-03-18 18:04:04,075 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 18:04:04,076 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 18:04:04,076 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 18:04:04,076 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 18:04:04,083 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 06:04:04" (1/1) ... [2022-03-18 18:04:04,083 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 06:04:04" (1/1) ... [2022-03-18 18:04:04,087 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 06:04:04" (1/1) ... [2022-03-18 18:04:04,087 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 06:04:04" (1/1) ... [2022-03-18 18:04:04,090 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 06:04:04" (1/1) ... [2022-03-18 18:04:04,092 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 06:04:04" (1/1) ... [2022-03-18 18:04:04,093 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 06:04:04" (1/1) ... [2022-03-18 18:04:04,096 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 18:04:04,096 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 18:04:04,096 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 18:04:04,096 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 18:04:04,097 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 06:04:04" (1/1) ... [2022-03-18 18:04:04,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 18:04:04,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 18:04:04,121 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-18 18:04:04,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-18 18:04:04,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 18:04:04,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 18:04:04,147 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 18:04:04,147 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 18:04:04,147 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 18:04:04,147 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 18:04:04,147 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 18:04:04,147 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 18:04:04,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 18:04:04,148 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 18:04:04,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 18:04:04,148 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 18:04:04,148 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 18:04:04,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 18:04:04,188 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 18:04:04,189 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 18:04:04,298 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 18:04:04,302 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 18:04:04,302 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-03-18 18:04:04,303 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 06:04:04 BoogieIcfgContainer [2022-03-18 18:04:04,303 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 18:04:04,304 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-18 18:04:04,304 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-18 18:04:04,305 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-18 18:04:04,307 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 06:04:04" (1/1) ... [2022-03-18 18:04:04,320 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 06:04:04 BasicIcfg [2022-03-18 18:04:04,320 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-18 18:04:04,321 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 18:04:04,321 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 18:04:04,323 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 18:04:04,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 06:04:03" (1/4) ... [2022-03-18 18:04:04,324 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6403e6af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 06:04:04, skipping insertion in model container [2022-03-18 18:04:04,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 06:04:04" (2/4) ... [2022-03-18 18:04:04,324 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6403e6af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 06:04:04, skipping insertion in model container [2022-03-18 18:04:04,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 06:04:04" (3/4) ... [2022-03-18 18:04:04,324 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6403e6af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 06:04:04, skipping insertion in model container [2022-03-18 18:04:04,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 06:04:04" (4/4) ... [2022-03-18 18:04:04,325 INFO L111 eAbstractionObserver]: Analyzing ICFG deep-nested.cJordan [2022-03-18 18:04:04,328 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-18 18:04:04,328 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 18:04:04,369 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 18:04:04,374 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 [2022-03-18 18:04:04,374 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 18:04:04,383 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 18:04:04,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-18 18:04:04,396 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 18:04:04,397 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 18:04:04,404 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 18:04:04,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 18:04:04,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1734228324, now seen corresponding path program 1 times [2022-03-18 18:04:04,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 18:04:04,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558267228] [2022-03-18 18:04:04,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:04:04,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 18:04:04,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:04:04,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 18:04:04,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:04:04,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 18:04:04,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 18:04:04,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558267228] [2022-03-18 18:04:04,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558267228] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 18:04:04,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 18:04:04,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 18:04:04,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057384563] [2022-03-18 18:04:04,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 18:04:04,720 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 18:04:04,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 18:04:04,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 18:04:04,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 18:04:04,747 INFO L87 Difference]: Start difference. First operand has 24 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:04:04,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 18:04:04,873 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2022-03-18 18:04:04,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 18:04:04,875 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-03-18 18:04:04,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 18:04:04,880 INFO L225 Difference]: With dead ends: 27 [2022-03-18 18:04:04,880 INFO L226 Difference]: Without dead ends: 22 [2022-03-18 18:04:04,881 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-03-18 18:04:04,884 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 43 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 18:04:04,884 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 30 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 18:04:04,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-03-18 18:04:04,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2022-03-18 18:04:04,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:04:04,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-03-18 18:04:04,908 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2022-03-18 18:04:04,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 18:04:04,909 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-03-18 18:04:04,909 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:04:04,909 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-03-18 18:04:04,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-18 18:04:04,909 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 18:04:04,910 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 18:04:04,910 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 18:04:04,910 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 18:04:04,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 18:04:04,911 INFO L85 PathProgramCache]: Analyzing trace with hash 235486120, now seen corresponding path program 1 times [2022-03-18 18:04:04,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 18:04:04,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082791722] [2022-03-18 18:04:04,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:04:04,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 18:04:04,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:04:05,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 18:04:05,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:04:05,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 18:04:05,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 18:04:05,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082791722] [2022-03-18 18:04:05,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082791722] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 18:04:05,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 18:04:05,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 18:04:05,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851358753] [2022-03-18 18:04:05,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 18:04:05,154 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 18:04:05,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 18:04:05,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 18:04:05,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 18:04:05,154 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:04:05,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 18:04:05,233 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2022-03-18 18:04:05,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 18:04:05,234 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-03-18 18:04:05,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 18:04:05,234 INFO L225 Difference]: With dead ends: 34 [2022-03-18 18:04:05,235 INFO L226 Difference]: Without dead ends: 34 [2022-03-18 18:04:05,235 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 18:04:05,236 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 39 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 18:04:05,236 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 19 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 18:04:05,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-18 18:04:05,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2022-03-18 18:04:05,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 28 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:04:05,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2022-03-18 18:04:05,240 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 16 [2022-03-18 18:04:05,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 18:04:05,240 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2022-03-18 18:04:05,240 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:04:05,241 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2022-03-18 18:04:05,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-18 18:04:05,241 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 18:04:05,241 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 18:04:05,241 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 18:04:05,241 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 18:04:05,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 18:04:05,242 INFO L85 PathProgramCache]: Analyzing trace with hash 658933123, now seen corresponding path program 1 times [2022-03-18 18:04:05,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 18:04:05,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677754791] [2022-03-18 18:04:05,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:04:05,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 18:04:05,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:04:05,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 18:04:05,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:04:05,387 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 18:04:05,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 18:04:05,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677754791] [2022-03-18 18:04:05,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677754791] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 18:04:05,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276575837] [2022-03-18 18:04:05,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:04:05,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 18:04:05,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 18:04:05,395 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) [2022-03-18 18:04:05,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 18:04:05,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:04:05,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-18 18:04:05,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 18:04:05,526 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 18:04:05,526 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 18:04:05,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276575837] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 18:04:05,526 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 18:04:05,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2022-03-18 18:04:05,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314593174] [2022-03-18 18:04:05,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 18:04:05,531 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 18:04:05,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 18:04:05,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 18:04:05,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-18 18:04:05,534 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:04:05,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 18:04:05,619 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2022-03-18 18:04:05,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 18:04:05,620 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-03-18 18:04:05,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 18:04:05,620 INFO L225 Difference]: With dead ends: 56 [2022-03-18 18:04:05,620 INFO L226 Difference]: Without dead ends: 56 [2022-03-18 18:04:05,621 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-18 18:04:05,621 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 49 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 18:04:05,622 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 30 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 18:04:05,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-18 18:04:05,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 34. [2022-03-18 18:04:05,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 30 states have (on average 1.3) internal successors, (39), 30 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:04:05,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2022-03-18 18:04:05,626 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 19 [2022-03-18 18:04:05,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 18:04:05,626 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2022-03-18 18:04:05,626 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:04:05,627 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2022-03-18 18:04:05,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-18 18:04:05,627 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 18:04:05,627 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 18:04:05,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-18 18:04:05,848 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 [2022-03-18 18:04:05,849 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 18:04:05,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 18:04:05,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1187944367, now seen corresponding path program 1 times [2022-03-18 18:04:05,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 18:04:05,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115299401] [2022-03-18 18:04:05,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:04:05,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 18:04:05,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:04:05,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 18:04:06,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:04:06,007 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 18:04:06,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 18:04:06,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115299401] [2022-03-18 18:04:06,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115299401] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 18:04:06,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118188382] [2022-03-18 18:04:06,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:04:06,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 18:04:06,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 18:04:06,012 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) [2022-03-18 18:04:06,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 18:04:06,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:04:06,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-18 18:04:06,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 18:04:06,118 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-18 18:04:06,118 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 18:04:06,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118188382] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 18:04:06,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 18:04:06,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2022-03-18 18:04:06,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978041973] [2022-03-18 18:04:06,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 18:04:06,119 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 18:04:06,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 18:04:06,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 18:04:06,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-03-18 18:04:06,120 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:04:06,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 18:04:06,176 INFO L93 Difference]: Finished difference Result 54 states and 66 transitions. [2022-03-18 18:04:06,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 18:04:06,177 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-03-18 18:04:06,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 18:04:06,178 INFO L225 Difference]: With dead ends: 54 [2022-03-18 18:04:06,178 INFO L226 Difference]: Without dead ends: 54 [2022-03-18 18:04:06,178 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-18 18:04:06,179 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 88 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 18:04:06,179 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 28 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 18:04:06,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-18 18:04:06,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 36. [2022-03-18 18:04:06,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 32 states have (on average 1.28125) internal successors, (41), 32 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:04:06,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2022-03-18 18:04:06,183 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 22 [2022-03-18 18:04:06,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 18:04:06,184 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2022-03-18 18:04:06,184 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:04:06,184 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2022-03-18 18:04:06,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-18 18:04:06,184 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 18:04:06,184 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 18:04:06,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 18:04:06,385 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 [2022-03-18 18:04:06,386 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 18:04:06,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 18:04:06,386 INFO L85 PathProgramCache]: Analyzing trace with hash -461329652, now seen corresponding path program 1 times [2022-03-18 18:04:06,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 18:04:06,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452863649] [2022-03-18 18:04:06,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:04:06,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 18:04:06,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:04:06,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 18:04:06,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:04:06,532 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-18 18:04:06,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 18:04:06,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452863649] [2022-03-18 18:04:06,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452863649] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 18:04:06,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263611479] [2022-03-18 18:04:06,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:04:06,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 18:04:06,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 18:04:06,539 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) [2022-03-18 18:04:06,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 18:04:06,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:04:06,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-18 18:04:06,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 18:04:06,633 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 18:04:06,634 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 18:04:06,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263611479] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 18:04:06,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 18:04:06,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2022-03-18 18:04:06,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892041158] [2022-03-18 18:04:06,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 18:04:06,634 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 18:04:06,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 18:04:06,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 18:04:06,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-03-18 18:04:06,636 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:04:06,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 18:04:06,686 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2022-03-18 18:04:06,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 18:04:06,686 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-03-18 18:04:06,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 18:04:06,690 INFO L225 Difference]: With dead ends: 52 [2022-03-18 18:04:06,690 INFO L226 Difference]: Without dead ends: 52 [2022-03-18 18:04:06,691 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-18 18:04:06,692 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 59 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 18:04:06,693 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 33 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 18:04:06,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-18 18:04:06,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 38. [2022-03-18 18:04:06,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 34 states have internal predecessors, (43), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:04:06,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2022-03-18 18:04:06,697 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 25 [2022-03-18 18:04:06,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 18:04:06,697 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2022-03-18 18:04:06,697 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:04:06,697 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2022-03-18 18:04:06,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-18 18:04:06,698 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 18:04:06,698 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 18:04:06,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 18:04:06,916 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 [2022-03-18 18:04:06,917 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 18:04:06,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 18:04:06,917 INFO L85 PathProgramCache]: Analyzing trace with hash -362951755, now seen corresponding path program 1 times [2022-03-18 18:04:06,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 18:04:06,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472001628] [2022-03-18 18:04:06,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:04:06,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 18:04:06,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:04:07,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 18:04:07,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:04:07,056 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 18:04:07,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 18:04:07,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472001628] [2022-03-18 18:04:07,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472001628] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 18:04:07,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741478573] [2022-03-18 18:04:07,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:04:07,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 18:04:07,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 18:04:07,059 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) [2022-03-18 18:04:07,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 18:04:07,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:04:07,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-18 18:04:07,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 18:04:07,277 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-18 18:04:07,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 18:04:07,457 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-18 18:04:07,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741478573] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 18:04:07,457 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 18:04:07,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2022-03-18 18:04:07,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490047396] [2022-03-18 18:04:07,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 18:04:07,458 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-18 18:04:07,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 18:04:07,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-18 18:04:07,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-03-18 18:04:07,458 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 17 states have internal predecessors, (70), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:04:09,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 18:04:09,206 INFO L93 Difference]: Finished difference Result 160 states and 185 transitions. [2022-03-18 18:04:09,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-18 18:04:09,207 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 17 states have internal predecessors, (70), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-03-18 18:04:09,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 18:04:09,207 INFO L225 Difference]: With dead ends: 160 [2022-03-18 18:04:09,207 INFO L226 Difference]: Without dead ends: 115 [2022-03-18 18:04:09,208 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=578, Invalid=1972, Unknown=0, NotChecked=0, Total=2550 [2022-03-18 18:04:09,209 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 684 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 684 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 18:04:09,209 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [684 Valid, 58 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 18:04:09,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-03-18 18:04:09,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 75. [2022-03-18 18:04:09,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 71 states have (on average 1.2253521126760563) internal successors, (87), 71 states have internal predecessors, (87), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:04:09,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 90 transitions. [2022-03-18 18:04:09,217 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 90 transitions. Word has length 31 [2022-03-18 18:04:09,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 18:04:09,217 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 90 transitions. [2022-03-18 18:04:09,217 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 17 states have internal predecessors, (70), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:04:09,217 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 90 transitions. [2022-03-18 18:04:09,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-18 18:04:09,218 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 18:04:09,218 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 18:04:09,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-18 18:04:09,418 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 [2022-03-18 18:04:09,419 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 18:04:09,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 18:04:09,419 INFO L85 PathProgramCache]: Analyzing trace with hash 85727721, now seen corresponding path program 2 times [2022-03-18 18:04:09,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 18:04:09,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910561353] [2022-03-18 18:04:09,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:04:09,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 18:04:09,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:04:09,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 18:04:09,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:04:09,587 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-18 18:04:09,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 18:04:09,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910561353] [2022-03-18 18:04:09,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910561353] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 18:04:09,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85257887] [2022-03-18 18:04:09,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 18:04:09,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 18:04:09,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 18:04:09,589 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) [2022-03-18 18:04:09,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 18:04:09,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-18 18:04:09,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 18:04:09,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-18 18:04:09,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 18:04:09,770 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-03-18 18:04:09,770 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 18:04:09,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85257887] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 18:04:09,770 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 18:04:09,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2022-03-18 18:04:09,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145520054] [2022-03-18 18:04:09,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 18:04:09,771 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 18:04:09,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 18:04:09,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 18:04:09,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-18 18:04:09,772 INFO L87 Difference]: Start difference. First operand 75 states and 90 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:04:09,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 18:04:09,791 INFO L93 Difference]: Finished difference Result 75 states and 89 transitions. [2022-03-18 18:04:09,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 18:04:09,792 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-03-18 18:04:09,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 18:04:09,793 INFO L225 Difference]: With dead ends: 75 [2022-03-18 18:04:09,793 INFO L226 Difference]: Without dead ends: 75 [2022-03-18 18:04:09,793 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-18 18:04:09,794 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 7 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 18:04:09,794 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 21 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 18:04:09,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-03-18 18:04:09,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2022-03-18 18:04:09,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 70 states have (on average 1.2142857142857142) internal successors, (85), 70 states have internal predecessors, (85), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:04:09,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 88 transitions. [2022-03-18 18:04:09,809 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 88 transitions. Word has length 52 [2022-03-18 18:04:09,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 18:04:09,810 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 88 transitions. [2022-03-18 18:04:09,810 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:04:09,810 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 88 transitions. [2022-03-18 18:04:09,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-18 18:04:09,819 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 18:04:09,819 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 18:04:09,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-18 18:04:10,020 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 18:04:10,020 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 18:04:10,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 18:04:10,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1363418955, now seen corresponding path program 3 times [2022-03-18 18:04:10,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 18:04:10,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703581715] [2022-03-18 18:04:10,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:04:10,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 18:04:10,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:04:10,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 18:04:10,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:04:10,191 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 17 proven. 64 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-03-18 18:04:10,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 18:04:10,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703581715] [2022-03-18 18:04:10,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703581715] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 18:04:10,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944179116] [2022-03-18 18:04:10,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 18:04:10,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 18:04:10,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 18:04:10,194 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) [2022-03-18 18:04:10,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-18 18:04:10,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-03-18 18:04:10,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 18:04:10,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-18 18:04:10,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 18:04:10,370 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-03-18 18:04:10,370 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 18:04:10,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944179116] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 18:04:10,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 18:04:10,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2022-03-18 18:04:10,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600285891] [2022-03-18 18:04:10,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 18:04:10,371 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 18:04:10,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 18:04:10,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 18:04:10,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-18 18:04:10,372 INFO L87 Difference]: Start difference. First operand 74 states and 88 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:04:10,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 18:04:10,391 INFO L93 Difference]: Finished difference Result 119 states and 141 transitions. [2022-03-18 18:04:10,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 18:04:10,392 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2022-03-18 18:04:10,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 18:04:10,392 INFO L225 Difference]: With dead ends: 119 [2022-03-18 18:04:10,393 INFO L226 Difference]: Without dead ends: 119 [2022-03-18 18:04:10,393 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-18 18:04:10,393 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 5 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 18:04:10,394 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 21 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 18:04:10,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-03-18 18:04:10,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 84. [2022-03-18 18:04:10,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 80 states have (on average 1.2125) internal successors, (97), 80 states have internal predecessors, (97), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:04:10,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 100 transitions. [2022-03-18 18:04:10,398 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 100 transitions. Word has length 67 [2022-03-18 18:04:10,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 18:04:10,398 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 100 transitions. [2022-03-18 18:04:10,398 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:04:10,398 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 100 transitions. [2022-03-18 18:04:10,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-18 18:04:10,399 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 18:04:10,399 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 18:04:10,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-18 18:04:10,599 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 18:04:10,600 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 18:04:10,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 18:04:10,600 INFO L85 PathProgramCache]: Analyzing trace with hash -935767155, now seen corresponding path program 4 times [2022-03-18 18:04:10,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 18:04:10,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408389711] [2022-03-18 18:04:10,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:04:10,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 18:04:10,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:04:10,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 18:04:10,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:04:10,754 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 20 proven. 83 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-03-18 18:04:10,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 18:04:10,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408389711] [2022-03-18 18:04:10,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408389711] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 18:04:10,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575152214] [2022-03-18 18:04:10,755 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 18:04:10,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 18:04:10,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 18:04:10,756 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) [2022-03-18 18:04:10,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-18 18:04:10,797 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 18:04:10,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 18:04:10,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-18 18:04:10,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 18:04:10,947 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 153 proven. 14 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-03-18 18:04:10,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 18:04:11,101 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 153 proven. 14 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-03-18 18:04:11,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575152214] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 18:04:11,101 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 18:04:11,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2022-03-18 18:04:11,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22380870] [2022-03-18 18:04:11,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 18:04:11,102 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-18 18:04:11,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 18:04:11,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-18 18:04:11,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-03-18 18:04:11,103 INFO L87 Difference]: Start difference. First operand 84 states and 100 transitions. Second operand has 18 states, 18 states have (on average 4.5) internal successors, (81), 17 states have internal predecessors, (81), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:04:11,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 18:04:11,893 INFO L93 Difference]: Finished difference Result 323 states and 360 transitions. [2022-03-18 18:04:11,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-18 18:04:11,899 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.5) internal successors, (81), 17 states have internal predecessors, (81), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 79 [2022-03-18 18:04:11,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 18:04:11,900 INFO L225 Difference]: With dead ends: 323 [2022-03-18 18:04:11,900 INFO L226 Difference]: Without dead ends: 244 [2022-03-18 18:04:11,901 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=278, Invalid=1128, Unknown=0, NotChecked=0, Total=1406 [2022-03-18 18:04:11,901 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 292 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 18:04:11,901 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 67 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 18:04:11,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-03-18 18:04:11,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 169. [2022-03-18 18:04:11,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 165 states have (on average 1.1393939393939394) internal successors, (188), 165 states have internal predecessors, (188), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:04:11,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 191 transitions. [2022-03-18 18:04:11,906 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 191 transitions. Word has length 79 [2022-03-18 18:04:11,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 18:04:11,906 INFO L478 AbstractCegarLoop]: Abstraction has 169 states and 191 transitions. [2022-03-18 18:04:11,906 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.5) internal successors, (81), 17 states have internal predecessors, (81), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:04:11,906 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 191 transitions. [2022-03-18 18:04:11,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-03-18 18:04:11,907 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 18:04:11,907 INFO L500 BasicCegarLoop]: trace histogram [34, 33, 33, 11, 10, 10, 5, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 18:04:11,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-18 18:04:12,107 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 18:04:12,108 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 18:04:12,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 18:04:12,108 INFO L85 PathProgramCache]: Analyzing trace with hash -291668787, now seen corresponding path program 5 times [2022-03-18 18:04:12,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 18:04:12,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126544828] [2022-03-18 18:04:12,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:04:12,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 18:04:12,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:04:12,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 18:04:12,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:04:12,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2233 backedges. 26 proven. 385 refuted. 0 times theorem prover too weak. 1822 trivial. 0 not checked. [2022-03-18 18:04:12,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 18:04:12,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126544828] [2022-03-18 18:04:12,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126544828] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 18:04:12,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581040524] [2022-03-18 18:04:12,355 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 18:04:12,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 18:04:12,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 18:04:12,356 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) [2022-03-18 18:04:12,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-18 18:04:13,122 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2022-03-18 18:04:13,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 18:04:13,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-18 18:04:13,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 18:04:13,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2233 backedges. 659 proven. 626 refuted. 0 times theorem prover too weak. 948 trivial. 0 not checked. [2022-03-18 18:04:13,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 18:04:14,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2233 backedges. 509 proven. 776 refuted. 0 times theorem prover too weak. 948 trivial. 0 not checked. [2022-03-18 18:04:14,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581040524] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 18:04:14,178 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 18:04:14,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 14] total 33 [2022-03-18 18:04:14,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153224668] [2022-03-18 18:04:14,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 18:04:14,178 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-18 18:04:14,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 18:04:14,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-18 18:04:14,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=893, Unknown=0, NotChecked=0, Total=1056 [2022-03-18 18:04:14,179 INFO L87 Difference]: Start difference. First operand 169 states and 191 transitions. Second operand has 33 states, 33 states have (on average 3.5454545454545454) internal successors, (117), 32 states have internal predecessors, (117), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:04:17,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 18:04:17,054 INFO L93 Difference]: Finished difference Result 508 states and 557 transitions. [2022-03-18 18:04:17,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-18 18:04:17,055 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.5454545454545454) internal successors, (117), 32 states have internal predecessors, (117), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 166 [2022-03-18 18:04:17,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 18:04:17,056 INFO L225 Difference]: With dead ends: 508 [2022-03-18 18:04:17,056 INFO L226 Difference]: Without dead ends: 396 [2022-03-18 18:04:17,057 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 311 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1286 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=881, Invalid=4089, Unknown=0, NotChecked=0, Total=4970 [2022-03-18 18:04:17,057 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 523 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-18 18:04:17,058 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [523 Valid, 87 Invalid, 941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-18 18:04:17,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2022-03-18 18:04:17,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 355. [2022-03-18 18:04:17,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 351 states have (on average 1.0940170940170941) internal successors, (384), 351 states have internal predecessors, (384), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:04:17,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 387 transitions. [2022-03-18 18:04:17,064 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 387 transitions. Word has length 166 [2022-03-18 18:04:17,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 18:04:17,064 INFO L478 AbstractCegarLoop]: Abstraction has 355 states and 387 transitions. [2022-03-18 18:04:17,064 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.5454545454545454) internal successors, (117), 32 states have internal predecessors, (117), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:04:17,064 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 387 transitions. [2022-03-18 18:04:17,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2022-03-18 18:04:17,066 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 18:04:17,066 INFO L500 BasicCegarLoop]: trace histogram [82, 81, 81, 19, 18, 18, 5, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 18:04:17,078 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-03-18 18:04:17,278 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,SelfDestructingSolverStorable9 [2022-03-18 18:04:17,279 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 18:04:17,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 18:04:17,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1704069873, now seen corresponding path program 6 times [2022-03-18 18:04:17,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 18:04:17,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262865848] [2022-03-18 18:04:17,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:04:17,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 18:04:17,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:04:17,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 18:04:17,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:04:17,751 INFO L134 CoverageAnalysis]: Checked inductivity of 11965 backedges. 34 proven. 1194 refuted. 0 times theorem prover too weak. 10737 trivial. 0 not checked. [2022-03-18 18:04:17,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 18:04:17,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262865848] [2022-03-18 18:04:17,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262865848] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 18:04:17,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28262675] [2022-03-18 18:04:17,752 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 18:04:17,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 18:04:17,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 18:04:17,755 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) [2022-03-18 18:04:17,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-18 18:04:17,833 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-18 18:04:17,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 18:04:17,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-18 18:04:17,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 18:04:18,619 INFO L134 CoverageAnalysis]: Checked inductivity of 11965 backedges. 5649 proven. 819 refuted. 0 times theorem prover too weak. 5497 trivial. 0 not checked. [2022-03-18 18:04:18,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 18:04:19,253 INFO L134 CoverageAnalysis]: Checked inductivity of 11965 backedges. 0 proven. 6468 refuted. 0 times theorem prover too weak. 5497 trivial. 0 not checked. [2022-03-18 18:04:19,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28262675] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 18:04:19,254 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 18:04:19,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5] total 17 [2022-03-18 18:04:19,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875062301] [2022-03-18 18:04:19,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 18:04:19,255 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-18 18:04:19,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 18:04:19,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-18 18:04:19,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2022-03-18 18:04:19,256 INFO L87 Difference]: Start difference. First operand 355 states and 387 transitions. Second operand has 17 states, 17 states have (on average 6.294117647058823) internal successors, (107), 16 states have internal predecessors, (107), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:04:20,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 18:04:20,490 INFO L93 Difference]: Finished difference Result 1921 states and 2036 transitions. [2022-03-18 18:04:20,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-18 18:04:20,490 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 6.294117647058823) internal successors, (107), 16 states have internal predecessors, (107), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 334 [2022-03-18 18:04:20,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 18:04:20,496 INFO L225 Difference]: With dead ends: 1921 [2022-03-18 18:04:20,496 INFO L226 Difference]: Without dead ends: 1921 [2022-03-18 18:04:20,497 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 716 GetRequests, 665 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=710, Invalid=2046, Unknown=0, NotChecked=0, Total=2756 [2022-03-18 18:04:20,497 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 344 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 18:04:20,497 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 53 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 18:04:20,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1921 states. [2022-03-18 18:04:20,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1921 to 982. [2022-03-18 18:04:20,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 982 states, 978 states have (on average 1.0664621676891615) internal successors, (1043), 978 states have internal predecessors, (1043), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:04:20,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 1046 transitions. [2022-03-18 18:04:20,517 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 1046 transitions. Word has length 334 [2022-03-18 18:04:20,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 18:04:20,518 INFO L478 AbstractCegarLoop]: Abstraction has 982 states and 1046 transitions. [2022-03-18 18:04:20,518 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.294117647058823) internal successors, (107), 16 states have internal predecessors, (107), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:04:20,518 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 1046 transitions. [2022-03-18 18:04:20,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 956 [2022-03-18 18:04:20,536 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 18:04:20,537 INFO L500 BasicCegarLoop]: trace histogram [259, 258, 258, 43, 42, 42, 11, 10, 10, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 18:04:20,555 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-03-18 18:04:20,742 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 18:04:20,743 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 18:04:20,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 18:04:20,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1381860083, now seen corresponding path program 7 times [2022-03-18 18:04:20,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 18:04:20,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658657894] [2022-03-18 18:04:20,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:04:20,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 18:04:21,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:04:22,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 18:04:22,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:04:22,628 INFO L134 CoverageAnalysis]: Checked inductivity of 114103 backedges. 70 proven. 5391 refuted. 0 times theorem prover too weak. 108642 trivial. 0 not checked. [2022-03-18 18:04:22,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 18:04:22,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658657894] [2022-03-18 18:04:22,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658657894] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 18:04:22,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315411935] [2022-03-18 18:04:22,629 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 18:04:22,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 18:04:22,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 18:04:22,630 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 18:04:22,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-18 18:04:22,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:04:22,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 1435 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-18 18:04:22,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 18:04:24,355 INFO L134 CoverageAnalysis]: Checked inductivity of 114103 backedges. 34688 proven. 2149 refuted. 0 times theorem prover too weak. 77266 trivial. 0 not checked. [2022-03-18 18:04:24,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 18:04:25,779 INFO L134 CoverageAnalysis]: Checked inductivity of 114103 backedges. 34684 proven. 2153 refuted. 0 times theorem prover too weak. 77266 trivial. 0 not checked. [2022-03-18 18:04:25,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315411935] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 18:04:25,779 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 18:04:25,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 27 [2022-03-18 18:04:25,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051280762] [2022-03-18 18:04:25,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 18:04:25,781 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-18 18:04:25,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 18:04:25,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-18 18:04:25,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2022-03-18 18:04:25,782 INFO L87 Difference]: Start difference. First operand 982 states and 1046 transitions. Second operand has 27 states, 27 states have (on average 4.407407407407407) internal successors, (119), 26 states have internal predecessors, (119), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:04:31,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 18:04:31,868 INFO L93 Difference]: Finished difference Result 3205 states and 3392 transitions. [2022-03-18 18:04:31,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-18 18:04:31,869 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.407407407407407) internal successors, (119), 26 states have internal predecessors, (119), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 955 [2022-03-18 18:04:31,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 18:04:31,877 INFO L225 Difference]: With dead ends: 3205 [2022-03-18 18:04:31,877 INFO L226 Difference]: Without dead ends: 3205 [2022-03-18 18:04:31,879 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1995 GetRequests, 1900 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2841 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1569, Invalid=7743, Unknown=0, NotChecked=0, Total=9312 [2022-03-18 18:04:31,879 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 847 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1085 mSolverCounterSat, 370 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 847 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 1455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 370 IncrementalHoareTripleChecker+Valid, 1085 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-18 18:04:31,879 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [847 Valid, 64 Invalid, 1455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [370 Valid, 1085 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-18 18:04:31,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3205 states. [2022-03-18 18:04:31,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3205 to 2835. [2022-03-18 18:04:31,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2835 states, 2831 states have (on average 1.0452137054044508) internal successors, (2959), 2831 states have internal predecessors, (2959), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:04:31,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2835 states to 2835 states and 2962 transitions. [2022-03-18 18:04:31,909 INFO L78 Accepts]: Start accepts. Automaton has 2835 states and 2962 transitions. Word has length 955 [2022-03-18 18:04:31,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 18:04:31,909 INFO L478 AbstractCegarLoop]: Abstraction has 2835 states and 2962 transitions. [2022-03-18 18:04:31,909 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.407407407407407) internal successors, (119), 26 states have internal predecessors, (119), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:04:31,909 INFO L276 IsEmpty]: Start isEmpty. Operand 2835 states and 2962 transitions. [2022-03-18 18:04:31,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2801 [2022-03-18 18:04:31,988 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 18:04:31,989 INFO L500 BasicCegarLoop]: trace histogram [809, 808, 808, 95, 94, 94, 24, 23, 23, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 18:04:32,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-18 18:04:32,199 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-18 18:04:32,199 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 18:04:32,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 18:04:32,200 INFO L85 PathProgramCache]: Analyzing trace with hash -190482432, now seen corresponding path program 8 times [2022-03-18 18:04:32,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 18:04:32,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618880217] [2022-03-18 18:04:32,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:04:32,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 18:04:37,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:04:39,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 18:04:39,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:04:39,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1072009 backedges. 148 proven. 24237 refuted. 0 times theorem prover too weak. 1047624 trivial. 0 not checked. [2022-03-18 18:04:39,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 18:04:39,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618880217] [2022-03-18 18:04:39,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618880217] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 18:04:39,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920614590] [2022-03-18 18:04:39,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 18:04:39,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 18:04:39,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 18:04:39,487 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 18:04:39,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-18 18:04:40,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 18:04:40,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 18:04:40,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 4025 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-18 18:04:40,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 18:04:46,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1072009 backedges. 536686 proven. 138269 refuted. 0 times theorem prover too weak. 397054 trivial. 0 not checked. [2022-03-18 18:04:46,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 18:04:52,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1072009 backedges. 536651 proven. 138304 refuted. 0 times theorem prover too weak. 397054 trivial. 0 not checked. [2022-03-18 18:04:52,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920614590] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 18:04:52,271 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 18:04:52,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 30 [2022-03-18 18:04:52,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394859597] [2022-03-18 18:04:52,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 18:04:52,275 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-18 18:04:52,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 18:04:52,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-18 18:04:52,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2022-03-18 18:04:52,276 INFO L87 Difference]: Start difference. First operand 2835 states and 2962 transitions. Second operand has 30 states, 30 states have (on average 4.666666666666667) internal successors, (140), 29 states have internal predecessors, (140), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:05:02,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 18:05:02,501 INFO L93 Difference]: Finished difference Result 12199 states and 12760 transitions. [2022-03-18 18:05:02,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-03-18 18:05:02,502 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.666666666666667) internal successors, (140), 29 states have internal predecessors, (140), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 2800 [2022-03-18 18:05:02,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 18:05:02,530 INFO L225 Difference]: With dead ends: 12199 [2022-03-18 18:05:02,530 INFO L226 Difference]: Without dead ends: 12199 [2022-03-18 18:05:02,534 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 5706 GetRequests, 5590 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4371 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=2079, Invalid=11727, Unknown=0, NotChecked=0, Total=13806 [2022-03-18 18:05:02,535 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 1178 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1710 mSolverCounterSat, 482 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1178 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 2192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 482 IncrementalHoareTripleChecker+Valid, 1710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-18 18:05:02,535 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1178 Valid, 76 Invalid, 2192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [482 Valid, 1710 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-18 18:05:02,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12199 states. [2022-03-18 18:05:02,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12199 to 11067. [2022-03-18 18:05:02,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11067 states, 11063 states have (on average 1.033987164421947) internal successors, (11439), 11063 states have internal predecessors, (11439), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:05:02,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11067 states to 11067 states and 11442 transitions. [2022-03-18 18:05:02,687 INFO L78 Accepts]: Start accepts. Automaton has 11067 states and 11442 transitions. Word has length 2800 [2022-03-18 18:05:02,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 18:05:02,688 INFO L478 AbstractCegarLoop]: Abstraction has 11067 states and 11442 transitions. [2022-03-18 18:05:02,688 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.666666666666667) internal successors, (140), 29 states have internal predecessors, (140), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:05:02,688 INFO L276 IsEmpty]: Start isEmpty. Operand 11067 states and 11442 transitions. [2022-03-18 18:05:03,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11024 [2022-03-18 18:05:03,523 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 18:05:03,526 INFO L500 BasicCegarLoop]: trace histogram [3302, 3301, 3301, 287, 286, 286, 72, 71, 71, 12, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 18:05:03,563 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-03-18 18:05:03,739 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-18 18:05:03,740 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 18:05:03,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 18:05:03,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1207739586, now seen corresponding path program 9 times [2022-03-18 18:05:03,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 18:05:03,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930761232] [2022-03-18 18:05:03,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:05:03,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 18:07:06,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:07:23,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 18:07:23,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:07:24,173 INFO L134 CoverageAnalysis]: Checked inductivity of 17442359 backedges. 452 proven. 128922 refuted. 0 times theorem prover too weak. 17312985 trivial. 0 not checked. [2022-03-18 18:07:24,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 18:07:24,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930761232] [2022-03-18 18:07:24,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930761232] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 18:07:24,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839342768] [2022-03-18 18:07:24,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 18:07:24,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 18:07:24,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 18:07:24,177 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 18:07:24,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-18 18:07:24,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-18 18:07:24,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 18:07:24,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-18 18:07:25,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 18:08:05,890 INFO L134 CoverageAnalysis]: Checked inductivity of 17442359 backedges. 0 proven. 8723839 refuted. 0 times theorem prover too weak. 8718520 trivial. 0 not checked. [2022-03-18 18:08:05,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 18:09:00,521 INFO L134 CoverageAnalysis]: Checked inductivity of 17442359 backedges. 0 proven. 8723839 refuted. 0 times theorem prover too weak. 8718520 trivial. 0 not checked. [2022-03-18 18:09:00,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839342768] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 18:09:00,521 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 18:09:00,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 4, 4] total 23 [2022-03-18 18:09:00,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24446654] [2022-03-18 18:09:00,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 18:09:00,532 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-18 18:09:00,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 18:09:00,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-18 18:09:00,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2022-03-18 18:09:00,533 INFO L87 Difference]: Start difference. First operand 11067 states and 11442 transitions. Second operand has 23 states, 23 states have (on average 5.3478260869565215) internal successors, (123), 22 states have internal predecessors, (123), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:09:04,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 18:09:04,696 INFO L93 Difference]: Finished difference Result 34881 states and 35819 transitions. [2022-03-18 18:09:04,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-03-18 18:09:04,696 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.3478260869565215) internal successors, (123), 22 states have internal predecessors, (123), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11023 [2022-03-18 18:09:04,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 18:09:04,738 INFO L225 Difference]: With dead ends: 34881 [2022-03-18 18:09:04,739 INFO L226 Difference]: Without dead ends: 33197 [2022-03-18 18:09:04,741 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 22145 GetRequests, 22045 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3259 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1341, Invalid=8961, Unknown=0, NotChecked=0, Total=10302 [2022-03-18 18:09:04,742 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 798 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1528 mSolverCounterSat, 309 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 798 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 1837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 309 IncrementalHoareTripleChecker+Valid, 1528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-18 18:09:04,742 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [798 Valid, 61 Invalid, 1837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [309 Valid, 1528 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-18 18:09:04,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33197 states. [2022-03-18 18:09:04,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33197 to 31758. [2022-03-18 18:09:05,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31758 states, 31754 states have (on average 1.0295080934685394) internal successors, (32691), 31754 states have internal predecessors, (32691), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:09:05,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31758 states to 31758 states and 32694 transitions. [2022-03-18 18:09:05,049 INFO L78 Accepts]: Start accepts. Automaton has 31758 states and 32694 transitions. Word has length 11023 [2022-03-18 18:09:05,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 18:09:05,050 INFO L478 AbstractCegarLoop]: Abstraction has 31758 states and 32694 transitions. [2022-03-18 18:09:05,051 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.3478260869565215) internal successors, (123), 22 states have internal predecessors, (123), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:09:05,051 INFO L276 IsEmpty]: Start isEmpty. Operand 31758 states and 32694 transitions. [2022-03-18 18:09:10,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31709 [2022-03-18 18:09:10,731 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 18:09:10,737 INFO L500 BasicCegarLoop]: trace histogram [9636, 9635, 9635, 719, 718, 718, 180, 179, 179, 30, 29, 29, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 18:09:10,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-18 18:09:10,937 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-18 18:09:10,937 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 18:09:10,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 18:09:10,942 INFO L85 PathProgramCache]: Analyzing trace with hash -437211357, now seen corresponding path program 10 times [2022-03-18 18:09:10,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 18:09:10,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876938580] [2022-03-18 18:09:10,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:09:10,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms