/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-b030c9e [2022-03-20 04:27:43,083 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 04:27:43,084 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 04:27:43,138 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 04:27:43,163 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 04:27:43,163 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 04:27:43,166 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 04:27:43,166 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-20 04:27:43,175 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 04:27:43,175 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 04:27:43,177 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 04:27:43,177 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 04:27:43,177 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 04:27:43,177 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 04:27:43,177 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 04:27:43,177 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 04:27:43,177 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 04:27:43,178 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 04:27:43,178 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 04:27:43,178 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 04:27:43,178 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 04:27:43,178 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 04:27:43,178 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 04:27:43,178 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 04:27:43,178 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 04:27:43,178 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 04:27:43,178 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 04:27:43,179 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 04:27:43,179 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 04:27:43,179 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 04:27:43,179 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 04:27:43,379 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 04:27:43,402 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 04:27:43,404 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 04:27:43,405 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 04:27:43,406 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 04:27:43,407 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-simple/deep-nested.c [2022-03-20 04:27:43,453 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/823a55a88/996aebcd32ad4fc7800f4480dac8d9d9/FLAGaaa9b3a6c [2022-03-20 04:27:43,792 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 04:27:43,793 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-simple/deep-nested.c [2022-03-20 04:27:43,806 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/823a55a88/996aebcd32ad4fc7800f4480dac8d9d9/FLAGaaa9b3a6c [2022-03-20 04:27:43,820 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/823a55a88/996aebcd32ad4fc7800f4480dac8d9d9 [2022-03-20 04:27:43,822 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 04:27:43,823 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 04:27:43,825 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 04:27:43,825 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 04:27:43,828 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 04:27:43,828 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 04:27:43" (1/1) ... [2022-03-20 04:27:43,829 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f42090d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:27:43, skipping insertion in model container [2022-03-20 04:27:43,829 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 04:27:43" (1/1) ... [2022-03-20 04:27:43,834 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 04:27:43,844 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 04:27:43,970 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] [2022-03-20 04:27:43,976 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 04:27:43,989 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 04:27:44,008 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] [2022-03-20 04:27:44,031 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 04:27:44,048 INFO L208 MainTranslator]: Completed translation [2022-03-20 04:27:44,048 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:27:44 WrapperNode [2022-03-20 04:27:44,048 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 04:27:44,049 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 04:27:44,049 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 04:27:44,049 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 04:27:44,059 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:27:44" (1/1) ... [2022-03-20 04:27:44,059 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:27:44" (1/1) ... [2022-03-20 04:27:44,065 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:27:44" (1/1) ... [2022-03-20 04:27:44,065 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:27:44" (1/1) ... [2022-03-20 04:27:44,074 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:27:44" (1/1) ... [2022-03-20 04:27:44,079 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:27:44" (1/1) ... [2022-03-20 04:27:44,084 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:27:44" (1/1) ... [2022-03-20 04:27:44,086 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 04:27:44,087 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 04:27:44,087 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 04:27:44,087 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 04:27:44,088 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:27:44" (1/1) ... [2022-03-20 04:27:44,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 04:27:44,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:27:44,109 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 04:27:44,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 04:27:44,146 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 04:27:44,146 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 04:27:44,146 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 04:27:44,146 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 04:27:44,147 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 04:27:44,147 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 04:27:44,147 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 04:27:44,147 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 04:27:44,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 04:27:44,147 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 04:27:44,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 04:27:44,148 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 04:27:44,148 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 04:27:44,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 04:27:44,195 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 04:27:44,197 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 04:27:44,342 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 04:27:44,346 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 04:27:44,347 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-03-20 04:27:44,348 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 04:27:44 BoogieIcfgContainer [2022-03-20 04:27:44,348 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 04:27:44,349 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 04:27:44,349 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 04:27:44,364 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 04:27:44,366 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 04:27:44" (1/1) ... [2022-03-20 04:27:44,368 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-03-20 04:27:44,379 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 04:27:44 BasicIcfg [2022-03-20 04:27:44,390 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 04:27:44,392 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 04:27:44,392 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 04:27:44,394 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 04:27:44,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 04:27:43" (1/4) ... [2022-03-20 04:27:44,395 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30c115f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 04:27:44, skipping insertion in model container [2022-03-20 04:27:44,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:27:44" (2/4) ... [2022-03-20 04:27:44,395 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30c115f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 04:27:44, skipping insertion in model container [2022-03-20 04:27:44,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 04:27:44" (3/4) ... [2022-03-20 04:27:44,395 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30c115f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 04:27:44, skipping insertion in model container [2022-03-20 04:27:44,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 04:27:44" (4/4) ... [2022-03-20 04:27:44,396 INFO L111 eAbstractionObserver]: Analyzing ICFG deep-nested.cJordan [2022-03-20 04:27:44,399 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-20 04:27:44,400 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 04:27:44,450 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 04:27:44,458 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 04:27:44,458 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 04:27:44,467 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) [2022-03-20 04:27:44,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-20 04:27:44,476 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:27:44,476 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:27:44,477 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:27:44,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:27:44,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1734228324, now seen corresponding path program 1 times [2022-03-20 04:27:44,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:27:44,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123148834] [2022-03-20 04:27:44,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:27:44,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:27:44,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:27:44,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 04:27:44,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:27:44,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 04:27:44,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:27:44,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123148834] [2022-03-20 04:27:44,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123148834] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 04:27:44,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 04:27:44,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 04:27:44,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519727602] [2022-03-20 04:27:44,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 04:27:44,725 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 04:27:44,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:27:44,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 04:27:44,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 04:27:44,746 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) [2022-03-20 04:27:44,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:27:44,849 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2022-03-20 04:27:44,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 04:27:44,852 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 [2022-03-20 04:27:44,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:27:44,857 INFO L225 Difference]: With dead ends: 27 [2022-03-20 04:27:44,857 INFO L226 Difference]: Without dead ends: 22 [2022-03-20 04:27:44,858 INFO L912 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 [2022-03-20 04:27:44,865 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 43 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2022-03-20 04:27:44,866 INFO L914 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] [2022-03-20 04:27:44,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-03-20 04:27:44,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2022-03-20 04:27:44,888 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) [2022-03-20 04:27:44,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-03-20 04:27:44,890 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2022-03-20 04:27:44,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:27:44,890 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-03-20 04:27:44,891 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) [2022-03-20 04:27:44,892 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-03-20 04:27:44,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-20 04:27:44,892 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:27:44,892 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:27:44,893 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 04:27:44,893 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:27:44,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:27:44,895 INFO L85 PathProgramCache]: Analyzing trace with hash 235486120, now seen corresponding path program 1 times [2022-03-20 04:27:44,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:27:44,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424704532] [2022-03-20 04:27:44,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:27:44,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:27:44,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:27:45,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 04:27:45,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:27:45,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 04:27:45,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:27:45,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424704532] [2022-03-20 04:27:45,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424704532] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 04:27:45,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 04:27:45,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 04:27:45,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718257119] [2022-03-20 04:27:45,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 04:27:45,152 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 04:27:45,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:27:45,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 04:27:45,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 04:27:45,154 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) [2022-03-20 04:27:45,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:27:45,228 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2022-03-20 04:27:45,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 04:27:45,229 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 [2022-03-20 04:27:45,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:27:45,230 INFO L225 Difference]: With dead ends: 34 [2022-03-20 04:27:45,231 INFO L226 Difference]: Without dead ends: 34 [2022-03-20 04:27:45,233 INFO L912 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 [2022-03-20 04:27:45,235 INFO L913 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 [2022-03-20 04:27:45,236 INFO L914 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] [2022-03-20 04:27:45,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-20 04:27:45,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2022-03-20 04:27:45,241 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) [2022-03-20 04:27:45,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2022-03-20 04:27:45,243 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 16 [2022-03-20 04:27:45,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:27:45,244 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2022-03-20 04:27:45,244 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) [2022-03-20 04:27:45,244 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2022-03-20 04:27:45,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-20 04:27:45,245 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:27:45,245 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:27:45,246 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 04:27:45,246 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:27:45,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:27:45,252 INFO L85 PathProgramCache]: Analyzing trace with hash 658933123, now seen corresponding path program 1 times [2022-03-20 04:27:45,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:27:45,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435194915] [2022-03-20 04:27:45,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:27:45,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:27:45,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:27:45,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 04:27:45,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:27:45,411 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 04:27:45,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:27:45,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435194915] [2022-03-20 04:27:45,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435194915] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:27:45,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933344501] [2022-03-20 04:27:45,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:27:45,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:27:45,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:27:45,414 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 04:27:45,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 04:27:45,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:27:45,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 04:27:45,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:27:45,529 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 04:27:45,530 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 04:27:45,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933344501] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 04:27:45,530 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 04:27:45,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2022-03-20 04:27:45,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909779193] [2022-03-20 04:27:45,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 04:27:45,534 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 04:27:45,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:27:45,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 04:27:45,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-20 04:27:45,536 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) [2022-03-20 04:27:45,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:27:45,594 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2022-03-20 04:27:45,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 04:27:45,595 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 [2022-03-20 04:27:45,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:27:45,596 INFO L225 Difference]: With dead ends: 56 [2022-03-20 04:27:45,596 INFO L226 Difference]: Without dead ends: 56 [2022-03-20 04:27:45,597 INFO L912 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 [2022-03-20 04:27:45,599 INFO L913 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, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 04:27:45,600 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 30 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 04:27:45,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-20 04:27:45,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 34. [2022-03-20 04:27:45,607 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) [2022-03-20 04:27:45,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2022-03-20 04:27:45,608 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 19 [2022-03-20 04:27:45,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:27:45,609 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2022-03-20 04:27:45,609 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) [2022-03-20 04:27:45,609 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2022-03-20 04:27:45,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 04:27:45,610 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:27:45,610 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:27:45,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 04:27:45,827 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:27:45,828 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:27:45,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:27:45,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1187944367, now seen corresponding path program 1 times [2022-03-20 04:27:45,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:27:45,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310167850] [2022-03-20 04:27:45,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:27:45,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:27:45,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:27:45,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 04:27:45,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:27:45,982 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 04:27:45,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:27:45,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310167850] [2022-03-20 04:27:45,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310167850] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:27:45,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451913157] [2022-03-20 04:27:45,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:27:45,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:27:45,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:27:45,984 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 04:27:45,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 04:27:46,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:27:46,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 04:27:46,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:27:46,078 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 04:27:46,078 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 04:27:46,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451913157] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 04:27:46,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 04:27:46,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2022-03-20 04:27:46,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013313925] [2022-03-20 04:27:46,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 04:27:46,081 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 04:27:46,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:27:46,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 04:27:46,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-03-20 04:27:46,084 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) [2022-03-20 04:27:46,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:27:46,138 INFO L93 Difference]: Finished difference Result 54 states and 66 transitions. [2022-03-20 04:27:46,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 04:27:46,139 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 [2022-03-20 04:27:46,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:27:46,140 INFO L225 Difference]: With dead ends: 54 [2022-03-20 04:27:46,140 INFO L226 Difference]: Without dead ends: 54 [2022-03-20 04:27:46,140 INFO L912 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 [2022-03-20 04:27:46,142 INFO L913 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 [2022-03-20 04:27:46,142 INFO L914 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] [2022-03-20 04:27:46,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-20 04:27:46,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 36. [2022-03-20 04:27:46,146 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) [2022-03-20 04:27:46,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2022-03-20 04:27:46,148 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 22 [2022-03-20 04:27:46,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:27:46,148 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2022-03-20 04:27:46,148 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) [2022-03-20 04:27:46,148 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2022-03-20 04:27:46,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-20 04:27:46,149 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:27:46,149 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:27:46,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 04:27:46,359 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-20 04:27:46,360 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:27:46,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:27:46,360 INFO L85 PathProgramCache]: Analyzing trace with hash -461329652, now seen corresponding path program 1 times [2022-03-20 04:27:46,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:27:46,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136106327] [2022-03-20 04:27:46,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:27:46,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:27:46,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:27:46,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 04:27:46,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:27:46,480 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 04:27:46,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:27:46,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136106327] [2022-03-20 04:27:46,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136106327] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:27:46,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583620896] [2022-03-20 04:27:46,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:27:46,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:27:46,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:27:46,482 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 04:27:46,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 04:27:46,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:27:46,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 04:27:46,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:27:46,572 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 04:27:46,572 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 04:27:46,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583620896] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 04:27:46,573 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 04:27:46,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2022-03-20 04:27:46,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318685837] [2022-03-20 04:27:46,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 04:27:46,573 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 04:27:46,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:27:46,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 04:27:46,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-03-20 04:27:46,574 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) [2022-03-20 04:27:46,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:27:46,631 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2022-03-20 04:27:46,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 04:27:46,632 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 [2022-03-20 04:27:46,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:27:46,632 INFO L225 Difference]: With dead ends: 52 [2022-03-20 04:27:46,632 INFO L226 Difference]: Without dead ends: 52 [2022-03-20 04:27:46,633 INFO L912 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 [2022-03-20 04:27:46,633 INFO L913 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 [2022-03-20 04:27:46,633 INFO L914 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] [2022-03-20 04:27:46,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-20 04:27:46,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 38. [2022-03-20 04:27:46,635 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) [2022-03-20 04:27:46,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2022-03-20 04:27:46,636 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 25 [2022-03-20 04:27:46,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:27:46,636 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2022-03-20 04:27:46,636 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) [2022-03-20 04:27:46,636 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2022-03-20 04:27:46,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-20 04:27:46,636 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:27:46,637 INFO L499 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] [2022-03-20 04:27:46,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 04:27:46,837 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:27:46,837 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:27:46,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:27:46,838 INFO L85 PathProgramCache]: Analyzing trace with hash -362951755, now seen corresponding path program 1 times [2022-03-20 04:27:46,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:27:46,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213845715] [2022-03-20 04:27:46,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:27:46,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:27:46,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:27:46,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 04:27:46,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:27:46,970 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 04:27:46,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:27:46,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213845715] [2022-03-20 04:27:46,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213845715] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:27:46,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725391111] [2022-03-20 04:27:46,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:27:46,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:27:46,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:27:46,972 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 04:27:46,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 04:27:47,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:27:47,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-20 04:27:47,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:27:47,137 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-20 04:27:47,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:27:47,304 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-20 04:27:47,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725391111] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 04:27:47,304 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 04:27:47,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2022-03-20 04:27:47,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253987363] [2022-03-20 04:27:47,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 04:27:47,305 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 04:27:47,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:27:47,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 04:27:47,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-03-20 04:27:47,306 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) [2022-03-20 04:27:49,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:27:49,067 INFO L93 Difference]: Finished difference Result 160 states and 185 transitions. [2022-03-20 04:27:49,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-20 04:27:49,067 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 [2022-03-20 04:27:49,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:27:49,068 INFO L225 Difference]: With dead ends: 160 [2022-03-20 04:27:49,068 INFO L226 Difference]: Without dead ends: 115 [2022-03-20 04:27:49,069 INFO L912 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 [2022-03-20 04:27:49,069 INFO L913 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 [2022-03-20 04:27:49,070 INFO L914 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] [2022-03-20 04:27:49,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-03-20 04:27:49,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 75. [2022-03-20 04:27:49,073 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) [2022-03-20 04:27:49,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 90 transitions. [2022-03-20 04:27:49,074 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 90 transitions. Word has length 31 [2022-03-20 04:27:49,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:27:49,074 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 90 transitions. [2022-03-20 04:27:49,074 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) [2022-03-20 04:27:49,074 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 90 transitions. [2022-03-20 04:27:49,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-20 04:27:49,075 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:27:49,075 INFO L499 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] [2022-03-20 04:27:49,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 04:27:49,291 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:27:49,291 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:27:49,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:27:49,292 INFO L85 PathProgramCache]: Analyzing trace with hash 85727721, now seen corresponding path program 2 times [2022-03-20 04:27:49,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:27:49,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676795150] [2022-03-20 04:27:49,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:27:49,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:27:49,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:27:49,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 04:27:49,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:27:49,459 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-20 04:27:49,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:27:49,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676795150] [2022-03-20 04:27:49,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676795150] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:27:49,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022044337] [2022-03-20 04:27:49,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 04:27:49,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:27:49,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:27:49,461 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 04:27:49,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 04:27:49,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-20 04:27:49,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 04:27:49,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 04:27:49,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:27:49,672 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-03-20 04:27:49,672 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 04:27:49,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022044337] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 04:27:49,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 04:27:49,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2022-03-20 04:27:49,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349112464] [2022-03-20 04:27:49,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 04:27:49,673 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 04:27:49,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:27:49,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 04:27:49,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-20 04:27:49,673 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) [2022-03-20 04:27:49,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:27:49,702 INFO L93 Difference]: Finished difference Result 75 states and 89 transitions. [2022-03-20 04:27:49,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 04:27:49,703 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 [2022-03-20 04:27:49,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:27:49,704 INFO L225 Difference]: With dead ends: 75 [2022-03-20 04:27:49,704 INFO L226 Difference]: Without dead ends: 75 [2022-03-20 04:27:49,705 INFO L912 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 [2022-03-20 04:27:49,706 INFO L913 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 [2022-03-20 04:27:49,707 INFO L914 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] [2022-03-20 04:27:49,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-03-20 04:27:49,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2022-03-20 04:27:49,715 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) [2022-03-20 04:27:49,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 88 transitions. [2022-03-20 04:27:49,716 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 88 transitions. Word has length 52 [2022-03-20 04:27:49,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:27:49,716 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 88 transitions. [2022-03-20 04:27:49,717 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) [2022-03-20 04:27:49,717 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 88 transitions. [2022-03-20 04:27:49,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-20 04:27:49,718 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:27:49,718 INFO L499 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] [2022-03-20 04:27:49,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 04:27:49,918 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:27:49,919 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:27:49,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:27:49,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1363418955, now seen corresponding path program 3 times [2022-03-20 04:27:49,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:27:49,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694064068] [2022-03-20 04:27:49,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:27:49,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:27:49,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:27:50,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 04:27:50,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:27:50,092 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 17 proven. 64 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-03-20 04:27:50,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:27:50,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694064068] [2022-03-20 04:27:50,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694064068] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:27:50,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790291915] [2022-03-20 04:27:50,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 04:27:50,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:27:50,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:27:50,094 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 04:27:50,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 04:27:50,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-03-20 04:27:50,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 04:27:50,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-20 04:27:50,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:27:50,252 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-03-20 04:27:50,252 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 04:27:50,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790291915] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 04:27:50,252 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 04:27:50,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2022-03-20 04:27:50,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485196796] [2022-03-20 04:27:50,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 04:27:50,254 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 04:27:50,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:27:50,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 04:27:50,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-20 04:27:50,255 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) [2022-03-20 04:27:50,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:27:50,275 INFO L93 Difference]: Finished difference Result 119 states and 141 transitions. [2022-03-20 04:27:50,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 04:27:50,275 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 [2022-03-20 04:27:50,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:27:50,278 INFO L225 Difference]: With dead ends: 119 [2022-03-20 04:27:50,278 INFO L226 Difference]: Without dead ends: 119 [2022-03-20 04:27:50,279 INFO L912 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 [2022-03-20 04:27:50,279 INFO L913 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 [2022-03-20 04:27:50,279 INFO L914 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] [2022-03-20 04:27:50,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-03-20 04:27:50,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 84. [2022-03-20 04:27:50,292 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) [2022-03-20 04:27:50,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 100 transitions. [2022-03-20 04:27:50,295 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 100 transitions. Word has length 67 [2022-03-20 04:27:50,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:27:50,295 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 100 transitions. [2022-03-20 04:27:50,295 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) [2022-03-20 04:27:50,295 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 100 transitions. [2022-03-20 04:27:50,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-20 04:27:50,298 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:27:50,298 INFO L499 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] [2022-03-20 04:27:50,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 04:27:50,498 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:27:50,499 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:27:50,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:27:50,499 INFO L85 PathProgramCache]: Analyzing trace with hash -935767155, now seen corresponding path program 4 times [2022-03-20 04:27:50,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:27:50,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227090869] [2022-03-20 04:27:50,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:27:50,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:27:50,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:27:50,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 04:27:50,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:27:50,689 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 20 proven. 83 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-03-20 04:27:50,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:27:50,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227090869] [2022-03-20 04:27:50,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227090869] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:27:50,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689459729] [2022-03-20 04:27:50,690 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 04:27:50,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:27:50,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:27:50,691 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 04:27:50,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 04:27:50,740 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 04:27:50,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 04:27:50,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-20 04:27:50,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:27:50,902 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 153 proven. 14 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-03-20 04:27:50,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:27:51,071 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 153 proven. 14 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-03-20 04:27:51,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689459729] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 04:27:51,071 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 04:27:51,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2022-03-20 04:27:51,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301139384] [2022-03-20 04:27:51,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 04:27:51,072 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 04:27:51,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:27:51,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 04:27:51,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-03-20 04:27:51,073 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) [2022-03-20 04:27:51,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:27:51,903 INFO L93 Difference]: Finished difference Result 323 states and 360 transitions. [2022-03-20 04:27:51,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 04:27:51,907 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 [2022-03-20 04:27:51,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:27:51,908 INFO L225 Difference]: With dead ends: 323 [2022-03-20 04:27:51,908 INFO L226 Difference]: Without dead ends: 244 [2022-03-20 04:27:51,908 INFO L912 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 [2022-03-20 04:27:51,909 INFO L913 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 [2022-03-20 04:27:51,909 INFO L914 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] [2022-03-20 04:27:51,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-03-20 04:27:51,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 169. [2022-03-20 04:27:51,913 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) [2022-03-20 04:27:51,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 191 transitions. [2022-03-20 04:27:51,914 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 191 transitions. Word has length 79 [2022-03-20 04:27:51,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:27:51,914 INFO L478 AbstractCegarLoop]: Abstraction has 169 states and 191 transitions. [2022-03-20 04:27:51,915 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) [2022-03-20 04:27:51,915 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 191 transitions. [2022-03-20 04:27:51,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-03-20 04:27:51,917 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:27:51,917 INFO L499 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] [2022-03-20 04:27:51,941 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-20 04:27:52,130 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 [2022-03-20 04:27:52,131 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:27:52,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:27:52,131 INFO L85 PathProgramCache]: Analyzing trace with hash -291668787, now seen corresponding path program 5 times [2022-03-20 04:27:52,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:27:52,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591433411] [2022-03-20 04:27:52,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:27:52,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:27:52,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:27:52,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 04:27:52,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:27:52,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2233 backedges. 26 proven. 385 refuted. 0 times theorem prover too weak. 1822 trivial. 0 not checked. [2022-03-20 04:27:52,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:27:52,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591433411] [2022-03-20 04:27:52,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591433411] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:27:52,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157075230] [2022-03-20 04:27:52,409 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 04:27:52,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:27:52,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:27:52,410 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 04:27:52,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 04:27:53,183 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2022-03-20 04:27:53,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 04:27:53,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 04:27:53,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:27:53,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2233 backedges. 659 proven. 626 refuted. 0 times theorem prover too weak. 948 trivial. 0 not checked. [2022-03-20 04:27:53,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:27:54,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2233 backedges. 509 proven. 776 refuted. 0 times theorem prover too weak. 948 trivial. 0 not checked. [2022-03-20 04:27:54,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157075230] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 04:27:54,294 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 04:27:54,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 14] total 33 [2022-03-20 04:27:54,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777886694] [2022-03-20 04:27:54,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 04:27:54,294 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-20 04:27:54,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:27:54,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-20 04:27:54,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=893, Unknown=0, NotChecked=0, Total=1056 [2022-03-20 04:27:54,295 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) [2022-03-20 04:27:57,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:27:57,132 INFO L93 Difference]: Finished difference Result 508 states and 557 transitions. [2022-03-20 04:27:57,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-20 04:27:57,133 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 [2022-03-20 04:27:57,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:27:57,134 INFO L225 Difference]: With dead ends: 508 [2022-03-20 04:27:57,134 INFO L226 Difference]: Without dead ends: 396 [2022-03-20 04:27:57,136 INFO L912 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 [2022-03-20 04:27:57,136 INFO L913 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 [2022-03-20 04:27:57,137 INFO L914 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] [2022-03-20 04:27:57,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2022-03-20 04:27:57,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 355. [2022-03-20 04:27:57,141 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) [2022-03-20 04:27:57,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 387 transitions. [2022-03-20 04:27:57,143 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 387 transitions. Word has length 166 [2022-03-20 04:27:57,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:27:57,143 INFO L478 AbstractCegarLoop]: Abstraction has 355 states and 387 transitions. [2022-03-20 04:27:57,143 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) [2022-03-20 04:27:57,143 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 387 transitions. [2022-03-20 04:27:57,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2022-03-20 04:27:57,146 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:27:57,146 INFO L499 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] [2022-03-20 04:27:57,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 04:27:57,350 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 [2022-03-20 04:27:57,353 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:27:57,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:27:57,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1704069873, now seen corresponding path program 6 times [2022-03-20 04:27:57,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:27:57,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747273466] [2022-03-20 04:27:57,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:27:57,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:27:57,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:27:57,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 04:27:57,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:27:57,888 INFO L134 CoverageAnalysis]: Checked inductivity of 11965 backedges. 34 proven. 1194 refuted. 0 times theorem prover too weak. 10737 trivial. 0 not checked. [2022-03-20 04:27:57,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:27:57,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747273466] [2022-03-20 04:27:57,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747273466] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:27:57,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318401782] [2022-03-20 04:27:57,890 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 04:27:57,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:27:57,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:27:57,895 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 04:27:57,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 04:27:57,953 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-20 04:27:57,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 04:27:57,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-20 04:27:57,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:27:58,744 INFO L134 CoverageAnalysis]: Checked inductivity of 11965 backedges. 5649 proven. 819 refuted. 0 times theorem prover too weak. 5497 trivial. 0 not checked. [2022-03-20 04:27:58,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:27:59,396 INFO L134 CoverageAnalysis]: Checked inductivity of 11965 backedges. 0 proven. 6468 refuted. 0 times theorem prover too weak. 5497 trivial. 0 not checked. [2022-03-20 04:27:59,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318401782] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 04:27:59,397 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 04:27:59,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5] total 17 [2022-03-20 04:27:59,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069296727] [2022-03-20 04:27:59,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 04:27:59,398 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 04:27:59,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:27:59,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 04:27:59,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2022-03-20 04:27:59,398 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) [2022-03-20 04:28:00,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:28:00,601 INFO L93 Difference]: Finished difference Result 1921 states and 2036 transitions. [2022-03-20 04:28:00,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-20 04:28:00,602 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 [2022-03-20 04:28:00,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:28:00,606 INFO L225 Difference]: With dead ends: 1921 [2022-03-20 04:28:00,606 INFO L226 Difference]: Without dead ends: 1921 [2022-03-20 04:28:00,607 INFO L912 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 [2022-03-20 04:28:00,608 INFO L913 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 [2022-03-20 04:28:00,608 INFO L914 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] [2022-03-20 04:28:00,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1921 states. [2022-03-20 04:28:00,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1921 to 982. [2022-03-20 04:28:00,632 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) [2022-03-20 04:28:00,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 1046 transitions. [2022-03-20 04:28:00,634 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 1046 transitions. Word has length 334 [2022-03-20 04:28:00,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:28:00,635 INFO L478 AbstractCegarLoop]: Abstraction has 982 states and 1046 transitions. [2022-03-20 04:28:00,635 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) [2022-03-20 04:28:00,635 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 1046 transitions. [2022-03-20 04:28:00,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 956 [2022-03-20 04:28:00,654 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:28:00,654 INFO L499 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] [2022-03-20 04:28:00,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 04:28:00,867 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 [2022-03-20 04:28:00,867 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:28:00,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:28:00,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1381860083, now seen corresponding path program 7 times [2022-03-20 04:28:00,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:28:00,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968477868] [2022-03-20 04:28:00,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:28:00,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:28:01,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:28:02,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 04:28:02,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:28:02,528 INFO L134 CoverageAnalysis]: Checked inductivity of 114103 backedges. 70 proven. 5391 refuted. 0 times theorem prover too weak. 108642 trivial. 0 not checked. [2022-03-20 04:28:02,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:28:02,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968477868] [2022-03-20 04:28:02,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968477868] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:28:02,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991801566] [2022-03-20 04:28:02,529 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-20 04:28:02,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:28:02,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:28:02,530 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) [2022-03-20 04:28:02,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 04:28:02,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:28:02,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 1435 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 04:28:02,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:28:04,230 INFO L134 CoverageAnalysis]: Checked inductivity of 114103 backedges. 34688 proven. 2149 refuted. 0 times theorem prover too weak. 77266 trivial. 0 not checked. [2022-03-20 04:28:04,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:28:05,579 INFO L134 CoverageAnalysis]: Checked inductivity of 114103 backedges. 34684 proven. 2153 refuted. 0 times theorem prover too weak. 77266 trivial. 0 not checked. [2022-03-20 04:28:05,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991801566] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 04:28:05,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 04:28:05,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 27 [2022-03-20 04:28:05,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332378969] [2022-03-20 04:28:05,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 04:28:05,585 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-20 04:28:05,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:28:05,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-20 04:28:05,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2022-03-20 04:28:05,586 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) [2022-03-20 04:28:11,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:28:11,556 INFO L93 Difference]: Finished difference Result 3205 states and 3392 transitions. [2022-03-20 04:28:11,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-20 04:28:11,557 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 [2022-03-20 04:28:11,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:28:11,565 INFO L225 Difference]: With dead ends: 3205 [2022-03-20 04:28:11,565 INFO L226 Difference]: Without dead ends: 3205 [2022-03-20 04:28:11,567 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1995 GetRequests, 1900 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2841 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=1569, Invalid=7743, Unknown=0, NotChecked=0, Total=9312 [2022-03-20 04:28:11,568 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 847 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1085 mSolverCounterSat, 370 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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 [2022-03-20 04:28:11,568 INFO L914 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] [2022-03-20 04:28:11,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3205 states. [2022-03-20 04:28:11,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3205 to 2835. [2022-03-20 04:28:11,597 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) [2022-03-20 04:28:11,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2835 states to 2835 states and 2962 transitions. [2022-03-20 04:28:11,604 INFO L78 Accepts]: Start accepts. Automaton has 2835 states and 2962 transitions. Word has length 955 [2022-03-20 04:28:11,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:28:11,604 INFO L478 AbstractCegarLoop]: Abstraction has 2835 states and 2962 transitions. [2022-03-20 04:28:11,604 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) [2022-03-20 04:28:11,604 INFO L276 IsEmpty]: Start isEmpty. Operand 2835 states and 2962 transitions. [2022-03-20 04:28:11,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2801 [2022-03-20 04:28:11,704 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:28:11,704 INFO L499 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] [2022-03-20 04:28:11,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 04:28:11,904 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 [2022-03-20 04:28:11,905 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:28:11,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:28:11,906 INFO L85 PathProgramCache]: Analyzing trace with hash -190482432, now seen corresponding path program 8 times [2022-03-20 04:28:11,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:28:11,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990055067] [2022-03-20 04:28:11,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:28:11,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:28:17,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:28:19,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 04:28:19,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:28:19,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1072009 backedges. 148 proven. 24237 refuted. 0 times theorem prover too weak. 1047624 trivial. 0 not checked. [2022-03-20 04:28:19,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:28:19,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990055067] [2022-03-20 04:28:19,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990055067] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:28:19,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739523969] [2022-03-20 04:28:19,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 04:28:19,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:28:19,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:28:19,173 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) [2022-03-20 04:28:19,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 04:28:19,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 04:28:19,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 04:28:19,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 4025 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 04:28:19,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:28:26,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1072009 backedges. 536686 proven. 138269 refuted. 0 times theorem prover too weak. 397054 trivial. 0 not checked. [2022-03-20 04:28:26,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:28:30,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1072009 backedges. 536651 proven. 138304 refuted. 0 times theorem prover too weak. 397054 trivial. 0 not checked. [2022-03-20 04:28:30,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739523969] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 04:28:30,594 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 04:28:30,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 30 [2022-03-20 04:28:30,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658816035] [2022-03-20 04:28:30,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 04:28:30,599 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-20 04:28:30,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:28:30,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-20 04:28:30,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2022-03-20 04:28:30,600 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) [2022-03-20 04:28:38,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:28:38,851 INFO L93 Difference]: Finished difference Result 12199 states and 12760 transitions. [2022-03-20 04:28:38,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-03-20 04:28:38,851 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 [2022-03-20 04:28:38,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:28:38,874 INFO L225 Difference]: With dead ends: 12199 [2022-03-20 04:28:38,874 INFO L226 Difference]: Without dead ends: 12199 [2022-03-20 04:28:38,878 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 5706 GetRequests, 5590 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4371 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=2079, Invalid=11727, Unknown=0, NotChecked=0, Total=13806 [2022-03-20 04:28:38,878 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 1178 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1710 mSolverCounterSat, 482 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s 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, 1.6s IncrementalHoareTripleChecker+Time [2022-03-20 04:28:38,878 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1178 Valid, 76 Invalid, 2192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [482 Valid, 1710 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-20 04:28:38,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12199 states. [2022-03-20 04:28:38,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12199 to 11067. [2022-03-20 04:28:38,974 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) [2022-03-20 04:28:38,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11067 states to 11067 states and 11442 transitions. [2022-03-20 04:28:38,989 INFO L78 Accepts]: Start accepts. Automaton has 11067 states and 11442 transitions. Word has length 2800 [2022-03-20 04:28:38,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:28:38,990 INFO L478 AbstractCegarLoop]: Abstraction has 11067 states and 11442 transitions. [2022-03-20 04:28:38,990 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) [2022-03-20 04:28:38,990 INFO L276 IsEmpty]: Start isEmpty. Operand 11067 states and 11442 transitions. [2022-03-20 04:28:39,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11024 [2022-03-20 04:28:39,704 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:28:39,706 INFO L499 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] [2022-03-20 04:28:39,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 04:28:39,915 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 [2022-03-20 04:28:39,915 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:28:39,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:28:39,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1207739586, now seen corresponding path program 9 times [2022-03-20 04:28:39,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:28:39,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67090906] [2022-03-20 04:28:39,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:28:39,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:30:39,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:30:56,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 04:30:56,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:30:57,097 INFO L134 CoverageAnalysis]: Checked inductivity of 17442359 backedges. 452 proven. 128922 refuted. 0 times theorem prover too weak. 17312985 trivial. 0 not checked. [2022-03-20 04:30:57,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:30:57,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67090906] [2022-03-20 04:30:57,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67090906] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:30:57,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75031827] [2022-03-20 04:30:57,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 04:30:57,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:30:57,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:30:57,101 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) [2022-03-20 04:30:57,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 04:30:57,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-20 04:30:57,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 04:30:57,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-20 04:30:57,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:31:36,650 INFO L134 CoverageAnalysis]: Checked inductivity of 17442359 backedges. 0 proven. 8723839 refuted. 0 times theorem prover too weak. 8718520 trivial. 0 not checked. [2022-03-20 04:31:36,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:32:07,062 INFO L134 CoverageAnalysis]: Checked inductivity of 17442359 backedges. 0 proven. 8723839 refuted. 0 times theorem prover too weak. 8718520 trivial. 0 not checked. [2022-03-20 04:32:07,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75031827] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 04:32:07,063 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 04:32:07,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 4, 4] total 23 [2022-03-20 04:32:07,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863737786] [2022-03-20 04:32:07,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 04:32:07,084 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 04:32:07,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:32:07,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 04:32:07,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2022-03-20 04:32:07,085 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) [2022-03-20 04:32:11,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:32:11,295 INFO L93 Difference]: Finished difference Result 34881 states and 35819 transitions. [2022-03-20 04:32:11,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-03-20 04:32:11,296 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 [2022-03-20 04:32:11,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:32:11,348 INFO L225 Difference]: With dead ends: 34881 [2022-03-20 04:32:11,349 INFO L226 Difference]: Without dead ends: 33197 [2022-03-20 04:32:11,352 INFO L912 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 [2022-03-20 04:32:11,352 INFO L913 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 [2022-03-20 04:32:11,352 INFO L914 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] [2022-03-20 04:32:11,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33197 states. [2022-03-20 04:32:11,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33197 to 31758. [2022-03-20 04:32:11,642 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) [2022-03-20 04:32:11,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31758 states to 31758 states and 32694 transitions. [2022-03-20 04:32:11,675 INFO L78 Accepts]: Start accepts. Automaton has 31758 states and 32694 transitions. Word has length 11023 [2022-03-20 04:32:11,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:32:11,676 INFO L478 AbstractCegarLoop]: Abstraction has 31758 states and 32694 transitions. [2022-03-20 04:32:11,677 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) [2022-03-20 04:32:11,677 INFO L276 IsEmpty]: Start isEmpty. Operand 31758 states and 32694 transitions. [2022-03-20 04:32:17,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31709 [2022-03-20 04:32:17,410 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:32:17,416 INFO L499 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] [2022-03-20 04:32:17,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-20 04:32:17,616 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 [2022-03-20 04:32:17,617 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:32:17,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:32:17,621 INFO L85 PathProgramCache]: Analyzing trace with hash -437211357, now seen corresponding path program 10 times [2022-03-20 04:32:17,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:32:17,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585591917] [2022-03-20 04:32:17,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:32:17,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms