/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/loops-crafted-1/mono-crafted_9.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 04:15:28,037 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 04:15:28,040 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 04:15:28,068 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 04:15:28,098 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 04:15:28,099 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 04:15:28,106 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 04:15:28,107 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-20 04:15:28,114 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 04:15:28,114 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 04:15:28,116 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 04:15:28,116 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 04:15:28,116 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 04:15:28,116 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 04:15:28,116 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 04:15:28,117 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 04:15:28,117 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 04:15:28,117 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 04:15:28,117 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 04:15:28,117 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 04:15:28,118 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 04:15:28,118 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 04:15:28,118 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 04:15:28,118 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 04:15:28,118 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 04:15:28,118 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 04:15:28,118 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 04:15:28,118 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 04:15:28,118 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 04:15:28,119 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 04:15:28,119 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 04:15:28,314 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 04:15:28,334 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 04:15:28,335 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 04:15:28,336 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 04:15:28,336 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 04:15:28,337 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_9.c [2022-03-20 04:15:28,400 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ae1c901b/2e91dd14dc694be0ab2d0b8d8ef70fe8/FLAG9f4fed780 [2022-03-20 04:15:28,753 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 04:15:28,754 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_9.c [2022-03-20 04:15:28,757 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ae1c901b/2e91dd14dc694be0ab2d0b8d8ef70fe8/FLAG9f4fed780 [2022-03-20 04:15:28,769 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ae1c901b/2e91dd14dc694be0ab2d0b8d8ef70fe8 [2022-03-20 04:15:28,771 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 04:15:28,772 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 04:15:28,774 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 04:15:28,774 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 04:15:28,776 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 04:15:28,777 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 04:15:28" (1/1) ... [2022-03-20 04:15:28,778 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@428d4f33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:15:28, skipping insertion in model container [2022-03-20 04:15:28,778 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 04:15:28" (1/1) ... [2022-03-20 04:15:28,782 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 04:15:28,790 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 04:15:28,943 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_9.c[318,331] [2022-03-20 04:15:28,950 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 04:15:28,954 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 04:15:28,961 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_9.c[318,331] [2022-03-20 04:15:28,963 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 04:15:28,971 INFO L208 MainTranslator]: Completed translation [2022-03-20 04:15:28,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:15:28 WrapperNode [2022-03-20 04:15:28,971 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 04:15:28,972 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 04:15:28,972 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 04:15:28,972 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 04:15:28,981 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:15:28" (1/1) ... [2022-03-20 04:15:28,981 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:15:28" (1/1) ... [2022-03-20 04:15:28,986 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:15:28" (1/1) ... [2022-03-20 04:15:28,986 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:15:28" (1/1) ... [2022-03-20 04:15:28,989 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:15:28" (1/1) ... [2022-03-20 04:15:28,991 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:15:28" (1/1) ... [2022-03-20 04:15:28,992 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:15:28" (1/1) ... [2022-03-20 04:15:28,992 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 04:15:28,993 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 04:15:28,993 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 04:15:28,993 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 04:15:28,994 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:15:28" (1/1) ... [2022-03-20 04:15:28,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 04:15:29,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:15:29,014 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 04:15:29,027 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 04:15:29,054 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 04:15:29,054 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 04:15:29,055 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 04:15:29,055 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 04:15:29,055 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 04:15:29,056 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 04:15:29,056 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 04:15:29,056 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 04:15:29,056 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 04:15:29,056 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 04:15:29,056 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 04:15:29,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 04:15:29,057 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 04:15:29,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 04:15:29,058 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 04:15:29,058 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 04:15:29,058 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 04:15:29,110 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 04:15:29,111 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 04:15:29,178 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 04:15:29,182 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 04:15:29,182 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 04:15:29,183 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 04:15:29 BoogieIcfgContainer [2022-03-20 04:15:29,183 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 04:15:29,184 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 04:15:29,184 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 04:15:29,184 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 04:15:29,187 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 04:15:29" (1/1) ... [2022-03-20 04:15:29,188 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-03-20 04:15:29,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 04:15:29 BasicIcfg [2022-03-20 04:15:29,196 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 04:15:29,197 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 04:15:29,197 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 04:15:29,198 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 04:15:29,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 04:15:28" (1/4) ... [2022-03-20 04:15:29,199 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59f8436 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 04:15:29, skipping insertion in model container [2022-03-20 04:15:29,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:15:28" (2/4) ... [2022-03-20 04:15:29,199 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59f8436 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 04:15:29, skipping insertion in model container [2022-03-20 04:15:29,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 04:15:29" (3/4) ... [2022-03-20 04:15:29,200 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59f8436 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 04:15:29, skipping insertion in model container [2022-03-20 04:15:29,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 04:15:29" (4/4) ... [2022-03-20 04:15:29,200 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_9.cJordan [2022-03-20 04:15:29,204 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-20 04:15:29,204 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 04:15:29,231 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 04:15:29,236 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 04:15:29,236 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 04:15:29,245 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 04:15:29,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-20 04:15:29,258 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:15:29,259 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:15:29,259 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:15:29,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:15:29,263 INFO L85 PathProgramCache]: Analyzing trace with hash -154368955, now seen corresponding path program 1 times [2022-03-20 04:15:29,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:15:29,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577822633] [2022-03-20 04:15:29,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:15:29,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:15:29,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:15:29,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 04:15:29,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:15:29,450 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 04:15:29,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:15:29,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577822633] [2022-03-20 04:15:29,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577822633] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 04:15:29,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 04:15:29,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 04:15:29,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151836738] [2022-03-20 04:15:29,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 04:15:29,457 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 04:15:29,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:15:29,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 04:15:29,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 04:15:29,508 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:15:29,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:15:29,555 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2022-03-20 04:15:29,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 04:15:29,560 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-03-20 04:15:29,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:15:29,565 INFO L225 Difference]: With dead ends: 20 [2022-03-20 04:15:29,565 INFO L226 Difference]: Without dead ends: 13 [2022-03-20 04:15:29,567 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 04:15:29,570 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 12 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 04:15:29,571 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 23 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 04:15:29,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-03-20 04:15:29,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-03-20 04:15:29,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:15:29,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2022-03-20 04:15:29,596 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2022-03-20 04:15:29,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:15:29,596 INFO L478 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2022-03-20 04:15:29,596 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:15:29,597 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2022-03-20 04:15:29,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-20 04:15:29,597 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:15:29,597 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:15:29,597 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 04:15:29,598 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:15:29,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:15:29,599 INFO L85 PathProgramCache]: Analyzing trace with hash -153445434, now seen corresponding path program 1 times [2022-03-20 04:15:29,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:15:29,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081705559] [2022-03-20 04:15:29,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:15:29,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:15:29,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:15:29,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 04:15:29,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:15:29,664 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 04:15:29,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:15:29,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081705559] [2022-03-20 04:15:29,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081705559] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 04:15:29,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 04:15:29,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 04:15:29,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615619634] [2022-03-20 04:15:29,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 04:15:29,667 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 04:15:29,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:15:29,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 04:15:29,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 04:15:29,668 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:15:29,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:15:29,701 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2022-03-20 04:15:29,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 04:15:29,702 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-03-20 04:15:29,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:15:29,702 INFO L225 Difference]: With dead ends: 15 [2022-03-20 04:15:29,702 INFO L226 Difference]: Without dead ends: 15 [2022-03-20 04:15:29,703 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 04:15:29,704 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 04:15:29,705 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 19 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 04:15:29,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-03-20 04:15:29,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-03-20 04:15:29,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:15:29,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-03-20 04:15:29,711 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2022-03-20 04:15:29,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:15:29,712 INFO L478 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-03-20 04:15:29,712 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:15:29,712 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-03-20 04:15:29,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-20 04:15:29,714 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:15:29,716 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:15:29,717 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 04:15:29,721 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:15:29,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:15:29,721 INFO L85 PathProgramCache]: Analyzing trace with hash -521762940, now seen corresponding path program 1 times [2022-03-20 04:15:29,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:15:29,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663523531] [2022-03-20 04:15:29,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:15:29,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:15:29,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:15:29,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 04:15:29,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:15:29,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 04:15:29,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:15:29,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663523531] [2022-03-20 04:15:29,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663523531] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:15:29,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208811431] [2022-03-20 04:15:29,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:15:29,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:15:29,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:15:29,787 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 04:15:29,788 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 04:15:29,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:15:29,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-20 04:15:29,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:15:29,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 04:15:29,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:15:29,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 04:15:29,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208811431] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 04:15:29,971 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 04:15:29,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-20 04:15:29,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901994260] [2022-03-20 04:15:29,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 04:15:29,973 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 04:15:29,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:15:29,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 04:15:29,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-20 04:15:29,974 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:15:30,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:15:30,071 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2022-03-20 04:15:30,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 04:15:30,071 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-03-20 04:15:30,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:15:30,072 INFO L225 Difference]: With dead ends: 20 [2022-03-20 04:15:30,072 INFO L226 Difference]: Without dead ends: 20 [2022-03-20 04:15:30,073 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-03-20 04:15:30,074 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 04:15:30,074 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 23 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 04:15:30,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-03-20 04:15:30,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-03-20 04:15:30,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:15:30,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-03-20 04:15:30,076 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 13 [2022-03-20 04:15:30,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:15:30,076 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-03-20 04:15:30,077 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:15:30,077 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-03-20 04:15:30,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-20 04:15:30,077 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:15:30,077 INFO L499 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:15:30,099 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 04:15:30,283 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 04:15:30,284 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:15:30,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:15:30,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1491075900, now seen corresponding path program 1 times [2022-03-20 04:15:30,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:15:30,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817091912] [2022-03-20 04:15:30,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:15:30,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:15:30,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:15:30,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 04:15:30,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:15:30,356 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 04:15:30,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:15:30,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817091912] [2022-03-20 04:15:30,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817091912] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:15:30,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257871505] [2022-03-20 04:15:30,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:15:30,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:15:30,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:15:30,358 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 04:15:30,359 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 04:15:30,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:15:30,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 04:15:30,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:15:30,458 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 04:15:30,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:15:30,539 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 04:15:30,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257871505] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 04:15:30,540 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 04:15:30,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-03-20 04:15:30,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084423942] [2022-03-20 04:15:30,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 04:15:30,544 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 04:15:30,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:15:30,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 04:15:30,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-03-20 04:15:30,552 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:15:30,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:15:30,645 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2022-03-20 04:15:30,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 04:15:30,645 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-03-20 04:15:30,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:15:30,646 INFO L225 Difference]: With dead ends: 28 [2022-03-20 04:15:30,646 INFO L226 Difference]: Without dead ends: 28 [2022-03-20 04:15:30,648 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-03-20 04:15:30,651 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 14 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 04:15:30,654 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 24 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 04:15:30,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-03-20 04:15:30,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-03-20 04:15:30,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:15:30,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2022-03-20 04:15:30,665 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 19 [2022-03-20 04:15:30,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:15:30,665 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2022-03-20 04:15:30,665 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:15:30,666 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2022-03-20 04:15:30,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-20 04:15:30,666 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:15:30,666 INFO L499 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:15:30,689 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 04:15:30,879 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 04:15:30,880 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:15:30,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:15:30,880 INFO L85 PathProgramCache]: Analyzing trace with hash 44690740, now seen corresponding path program 2 times [2022-03-20 04:15:30,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:15:30,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898712969] [2022-03-20 04:15:30,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:15:30,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:15:30,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:15:30,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 04:15:30,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:15:30,975 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 04:15:30,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:15:30,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898712969] [2022-03-20 04:15:30,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898712969] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:15:30,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896254130] [2022-03-20 04:15:30,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 04:15:30,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:15:30,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:15:30,991 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 04:15:31,001 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 04:15:31,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 04:15:31,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 04:15:31,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-20 04:15:31,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:15:31,105 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 04:15:31,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:15:31,221 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 04:15:31,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896254130] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 04:15:31,222 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 04:15:31,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-03-20 04:15:31,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518871186] [2022-03-20 04:15:31,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 04:15:31,223 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 04:15:31,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:15:31,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 04:15:31,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-03-20 04:15:31,224 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:15:31,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:15:31,394 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2022-03-20 04:15:31,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 04:15:31,394 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-03-20 04:15:31,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:15:31,395 INFO L225 Difference]: With dead ends: 44 [2022-03-20 04:15:31,395 INFO L226 Difference]: Without dead ends: 44 [2022-03-20 04:15:31,395 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=377, Invalid=615, Unknown=0, NotChecked=0, Total=992 [2022-03-20 04:15:31,396 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 22 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 04:15:31,396 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 24 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 04:15:31,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-20 04:15:31,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-03-20 04:15:31,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:15:31,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2022-03-20 04:15:31,400 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 27 [2022-03-20 04:15:31,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:15:31,400 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2022-03-20 04:15:31,400 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:15:31,400 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2022-03-20 04:15:31,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-20 04:15:31,401 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:15:31,401 INFO L499 BasicCegarLoop]: trace histogram [16, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:15:31,420 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 04:15:31,611 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 04:15:31,612 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:15:31,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:15:31,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1982683428, now seen corresponding path program 3 times [2022-03-20 04:15:31,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:15:31,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655122101] [2022-03-20 04:15:31,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:15:31,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:15:31,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:15:31,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 04:15:31,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:15:31,796 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 45 proven. 210 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 04:15:31,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:15:31,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655122101] [2022-03-20 04:15:31,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655122101] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:15:31,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018656515] [2022-03-20 04:15:31,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 04:15:31,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:15:31,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:15:31,797 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 04:15:31,798 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 04:15:31,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-20 04:15:31,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 04:15:31,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 04:15:31,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:15:31,921 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 70 proven. 4 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2022-03-20 04:15:31,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:15:32,032 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 70 proven. 4 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2022-03-20 04:15:32,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018656515] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 04:15:32,033 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 04:15:32,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 5, 5] total 24 [2022-03-20 04:15:32,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112139323] [2022-03-20 04:15:32,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 04:15:32,033 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 04:15:32,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:15:32,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 04:15:32,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2022-03-20 04:15:32,034 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:15:32,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:15:32,392 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2022-03-20 04:15:32,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 04:15:32,392 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-03-20 04:15:32,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:15:32,394 INFO L225 Difference]: With dead ends: 54 [2022-03-20 04:15:32,394 INFO L226 Difference]: Without dead ends: 54 [2022-03-20 04:15:32,395 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2022-03-20 04:15:32,396 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 66 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 04:15:32,396 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 28 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 04:15:32,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-20 04:15:32,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-03-20 04:15:32,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:15:32,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2022-03-20 04:15:32,401 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 43 [2022-03-20 04:15:32,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:15:32,401 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2022-03-20 04:15:32,401 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:15:32,401 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2022-03-20 04:15:32,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-20 04:15:32,402 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:15:32,402 INFO L499 BasicCegarLoop]: trace histogram [21, 15, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:15:32,419 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-20 04:15:32,615 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 04:15:32,615 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:15:32,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:15:32,616 INFO L85 PathProgramCache]: Analyzing trace with hash -2103021866, now seen corresponding path program 4 times [2022-03-20 04:15:32,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:15:32,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990095085] [2022-03-20 04:15:32,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:15:32,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:15:32,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:15:32,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 04:15:32,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:15:32,811 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 176 proven. 240 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-20 04:15:32,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:15:32,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990095085] [2022-03-20 04:15:32,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990095085] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:15:32,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899555542] [2022-03-20 04:15:32,811 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 04:15:32,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:15:32,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:15:32,813 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 04:15:32,814 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 04:15:32,851 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 04:15:32,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 04:15:32,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 04:15:32,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:15:32,938 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 176 proven. 240 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-20 04:15:32,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:15:33,288 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 176 proven. 240 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-20 04:15:33,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899555542] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 04:15:33,289 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 04:15:33,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 36 [2022-03-20 04:15:33,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438280946] [2022-03-20 04:15:33,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 04:15:33,290 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-20 04:15:33,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:15:33,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-20 04:15:33,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 04:15:33,292 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 36 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 35 states have internal predecessors, (78), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:15:33,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:15:33,824 INFO L93 Difference]: Finished difference Result 88 states and 94 transitions. [2022-03-20 04:15:33,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-20 04:15:33,825 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 35 states have internal predecessors, (78), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-03-20 04:15:33,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:15:33,825 INFO L225 Difference]: With dead ends: 88 [2022-03-20 04:15:33,825 INFO L226 Difference]: Without dead ends: 88 [2022-03-20 04:15:33,827 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1718, Invalid=2838, Unknown=0, NotChecked=0, Total=4556 [2022-03-20 04:15:33,827 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 40 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 04:15:33,828 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 44 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 04:15:33,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-03-20 04:15:33,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-03-20 04:15:33,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.0843373493975903) internal successors, (90), 83 states have internal predecessors, (90), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:15:33,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 94 transitions. [2022-03-20 04:15:33,833 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 94 transitions. Word has length 53 [2022-03-20 04:15:33,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:15:33,833 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 94 transitions. [2022-03-20 04:15:33,833 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 35 states have internal predecessors, (78), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:15:33,834 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 94 transitions. [2022-03-20 04:15:33,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-03-20 04:15:33,834 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:15:33,834 INFO L499 BasicCegarLoop]: trace histogram [38, 32, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:15:33,855 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 04:15:34,035 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 04:15:34,035 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:15:34,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:15:34,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1986185996, now seen corresponding path program 5 times [2022-03-20 04:15:34,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:15:34,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717969003] [2022-03-20 04:15:34,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:15:34,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:15:34,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:15:34,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 04:15:34,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:15:34,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 363 proven. 1056 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-20 04:15:34,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:15:34,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717969003] [2022-03-20 04:15:34,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717969003] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:15:34,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815417432] [2022-03-20 04:15:34,504 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 04:15:34,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:15:34,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:15:34,505 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 04:15:34,510 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 04:15:34,569 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 39 check-sat command(s) [2022-03-20 04:15:34,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 04:15:34,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-20 04:15:34,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:15:34,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 363 proven. 1056 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-20 04:15:34,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:15:35,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 363 proven. 1056 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-20 04:15:35,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815417432] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 04:15:35,957 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 04:15:35,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 70 [2022-03-20 04:15:35,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341011857] [2022-03-20 04:15:35,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 04:15:35,958 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-03-20 04:15:35,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:15:35,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-03-20 04:15:35,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2022-03-20 04:15:35,961 INFO L87 Difference]: Start difference. First operand 88 states and 94 transitions. Second operand has 70 states, 70 states have (on average 2.085714285714286) internal successors, (146), 69 states have internal predecessors, (146), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:15:37,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:15:37,672 INFO L93 Difference]: Finished difference Result 156 states and 162 transitions. [2022-03-20 04:15:37,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-20 04:15:37,672 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.085714285714286) internal successors, (146), 69 states have internal predecessors, (146), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2022-03-20 04:15:37,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:15:37,673 INFO L225 Difference]: With dead ends: 156 [2022-03-20 04:15:37,673 INFO L226 Difference]: Without dead ends: 156 [2022-03-20 04:15:37,676 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2865 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=6903, Invalid=11457, Unknown=0, NotChecked=0, Total=18360 [2022-03-20 04:15:37,677 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 74 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 04:15:37,677 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 49 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 04:15:37,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-03-20 04:15:37,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2022-03-20 04:15:37,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 151 states have (on average 1.0463576158940397) internal successors, (158), 151 states have internal predecessors, (158), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:15:37,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 162 transitions. [2022-03-20 04:15:37,683 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 162 transitions. Word has length 87 [2022-03-20 04:15:37,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:15:37,683 INFO L478 AbstractCegarLoop]: Abstraction has 156 states and 162 transitions. [2022-03-20 04:15:37,683 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.085714285714286) internal successors, (146), 69 states have internal predecessors, (146), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:15:37,683 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 162 transitions. [2022-03-20 04:15:37,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-03-20 04:15:37,684 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:15:37,684 INFO L499 BasicCegarLoop]: trace histogram [72, 66, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:15:37,701 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 04:15:37,892 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 04:15:37,893 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:15:37,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:15:37,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1296796336, now seen corresponding path program 6 times [2022-03-20 04:15:37,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:15:37,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591106066] [2022-03-20 04:15:37,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:15:37,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:15:37,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:15:39,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 04:15:39,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:15:39,343 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 737 proven. 4422 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-20 04:15:39,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:15:39,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591106066] [2022-03-20 04:15:39,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591106066] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:15:39,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607682475] [2022-03-20 04:15:39,344 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 04:15:39,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:15:39,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:15:39,345 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 04:15:39,350 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 04:15:39,393 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2022-03-20 04:15:39,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 04:15:39,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 04:15:39,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:15:39,863 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 858 proven. 36 refuted. 0 times theorem prover too weak. 4290 trivial. 0 not checked. [2022-03-20 04:15:39,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:15:40,352 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 858 proven. 36 refuted. 0 times theorem prover too weak. 4290 trivial. 0 not checked. [2022-03-20 04:15:40,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607682475] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 04:15:40,353 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 04:15:40,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 9, 9] total 84 [2022-03-20 04:15:40,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534374227] [2022-03-20 04:15:40,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 04:15:40,353 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-03-20 04:15:40,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:15:40,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-03-20 04:15:40,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2022-03-20 04:15:40,356 INFO L87 Difference]: Start difference. First operand 156 states and 162 transitions. Second operand has 84 states, 84 states have (on average 2.0833333333333335) internal successors, (175), 83 states have internal predecessors, (175), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:15:42,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:15:42,938 INFO L93 Difference]: Finished difference Result 174 states and 188 transitions. [2022-03-20 04:15:42,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-03-20 04:15:42,939 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.0833333333333335) internal successors, (175), 83 states have internal predecessors, (175), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 155 [2022-03-20 04:15:42,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:15:42,943 INFO L225 Difference]: With dead ends: 174 [2022-03-20 04:15:42,943 INFO L226 Difference]: Without dead ends: 174 [2022-03-20 04:15:42,947 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 311 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3321 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=10209, Invalid=16851, Unknown=0, NotChecked=0, Total=27060 [2022-03-20 04:15:42,949 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 168 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 04:15:42,949 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 33 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 04:15:42,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-03-20 04:15:42,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2022-03-20 04:15:42,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 169 states have (on average 1.0887573964497042) internal successors, (184), 169 states have internal predecessors, (184), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:15:42,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 188 transitions. [2022-03-20 04:15:42,963 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 188 transitions. Word has length 155 [2022-03-20 04:15:42,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:15:42,963 INFO L478 AbstractCegarLoop]: Abstraction has 174 states and 188 transitions. [2022-03-20 04:15:42,963 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.0833333333333335) internal successors, (175), 83 states have internal predecessors, (175), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:15:42,963 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 188 transitions. [2022-03-20 04:15:42,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-03-20 04:15:42,965 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:15:42,965 INFO L499 BasicCegarLoop]: trace histogram [81, 67, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:15:42,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 04:15:43,171 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 04:15:43,174 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:15:43,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:15:43,174 INFO L85 PathProgramCache]: Analyzing trace with hash -140127658, now seen corresponding path program 7 times [2022-03-20 04:15:43,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:15:43,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371146978] [2022-03-20 04:15:43,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:15:43,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:15:43,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:15:44,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 04:15:44,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:15:44,622 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 1836 proven. 4556 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-03-20 04:15:44,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:15:44,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371146978] [2022-03-20 04:15:44,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371146978] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:15:44,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596559353] [2022-03-20 04:15:44,622 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-20 04:15:44,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:15:44,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:15:44,623 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 04:15:44,624 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 04:15:44,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:15:44,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 69 conjunts are in the unsatisfiable core [2022-03-20 04:15:44,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:15:44,973 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 1836 proven. 4556 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-03-20 04:15:44,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:15:49,138 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 1836 proven. 4556 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-03-20 04:15:49,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596559353] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 04:15:49,138 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 04:15:49,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 70, 70] total 140 [2022-03-20 04:15:49,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208881355] [2022-03-20 04:15:49,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 04:15:49,139 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-03-20 04:15:49,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:15:49,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-03-20 04:15:49,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9593, Invalid=9867, Unknown=0, NotChecked=0, Total=19460 [2022-03-20 04:15:49,143 INFO L87 Difference]: Start difference. First operand 174 states and 188 transitions. Second operand has 140 states, 140 states have (on average 2.0428571428571427) internal successors, (286), 139 states have internal predecessors, (286), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:15:55,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:15:55,248 INFO L93 Difference]: Finished difference Result 312 states and 326 transitions. [2022-03-20 04:15:55,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2022-03-20 04:15:55,248 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 2.0428571428571427) internal successors, (286), 139 states have internal predecessors, (286), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 173 [2022-03-20 04:15:55,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:15:55,249 INFO L225 Difference]: With dead ends: 312 [2022-03-20 04:15:55,249 INFO L226 Difference]: Without dead ends: 312 [2022-03-20 04:15:55,254 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 553 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11860 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=28498, Invalid=47402, Unknown=0, NotChecked=0, Total=75900 [2022-03-20 04:15:55,255 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 144 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 04:15:55,255 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 54 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 04:15:55,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-03-20 04:15:55,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 312. [2022-03-20 04:15:55,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 307 states have (on average 1.0488599348534202) internal successors, (322), 307 states have internal predecessors, (322), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:15:55,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 326 transitions. [2022-03-20 04:15:55,263 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 326 transitions. Word has length 173 [2022-03-20 04:15:55,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:15:55,263 INFO L478 AbstractCegarLoop]: Abstraction has 312 states and 326 transitions. [2022-03-20 04:15:55,264 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 2.0428571428571427) internal successors, (286), 139 states have internal predecessors, (286), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:15:55,264 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 326 transitions. [2022-03-20 04:15:55,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2022-03-20 04:15:55,267 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:15:55,267 INFO L499 BasicCegarLoop]: trace histogram [150, 136, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:15:55,285 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-03-20 04:15:55,485 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 04:15:55,486 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:15:55,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:15:55,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1017097204, now seen corresponding path program 8 times [2022-03-20 04:15:55,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:15:55,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880637022] [2022-03-20 04:15:55,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:15:55,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:15:55,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:16:01,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 04:16:01,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:16:01,064 INFO L134 CoverageAnalysis]: Checked inductivity of 22500 backedges. 3699 proven. 18632 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-03-20 04:16:01,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:16:01,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880637022] [2022-03-20 04:16:01,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880637022] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:16:01,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010816239] [2022-03-20 04:16:01,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 04:16:01,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:16:01,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:16:01,066 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 04:16:01,067 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 04:16:01,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 04:16:01,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 04:16:01,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 138 conjunts are in the unsatisfiable core [2022-03-20 04:16:01,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:16:01,748 INFO L134 CoverageAnalysis]: Checked inductivity of 22500 backedges. 3699 proven. 18632 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-03-20 04:16:01,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:16:17,980 INFO L134 CoverageAnalysis]: Checked inductivity of 22500 backedges. 3699 proven. 18632 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-03-20 04:16:17,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010816239] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 04:16:17,981 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 04:16:17,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [140, 139, 139] total 278 [2022-03-20 04:16:17,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897085211] [2022-03-20 04:16:17,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 04:16:17,982 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 278 states [2022-03-20 04:16:17,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:16:17,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 278 interpolants. [2022-03-20 04:16:18,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38228, Invalid=38778, Unknown=0, NotChecked=0, Total=77006 [2022-03-20 04:16:18,001 INFO L87 Difference]: Start difference. First operand 312 states and 326 transitions. Second operand has 278 states, 278 states have (on average 2.0215827338129495) internal successors, (562), 277 states have internal predecessors, (562), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:16:41,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:16:41,374 INFO L93 Difference]: Finished difference Result 588 states and 602 transitions. [2022-03-20 04:16:41,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 277 states. [2022-03-20 04:16:41,375 INFO L78 Accepts]: Start accepts. Automaton has has 278 states, 278 states have (on average 2.0215827338129495) internal successors, (562), 277 states have internal predecessors, (562), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 311 [2022-03-20 04:16:41,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:16:41,377 INFO L225 Difference]: With dead ends: 588 [2022-03-20 04:16:41,377 INFO L226 Difference]: Without dead ends: 588 [2022-03-20 04:16:41,392 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1036 GetRequests, 486 SyntacticMatches, 0 SemanticMatches, 550 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47533 ImplicationChecksByTransitivity, 42.5s TimeCoverageRelationStatistics Valid=114127, Invalid=190025, Unknown=0, NotChecked=0, Total=304152 [2022-03-20 04:16:41,393 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 282 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 414 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 414 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 04:16:41,393 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 39 Invalid, 997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [414 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 04:16:41,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2022-03-20 04:16:41,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 588. [2022-03-20 04:16:41,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 583 states have (on average 1.0257289879931388) internal successors, (598), 583 states have internal predecessors, (598), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:16:41,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 602 transitions. [2022-03-20 04:16:41,404 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 602 transitions. Word has length 311 [2022-03-20 04:16:41,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:16:41,404 INFO L478 AbstractCegarLoop]: Abstraction has 588 states and 602 transitions. [2022-03-20 04:16:41,405 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 278 states, 278 states have (on average 2.0215827338129495) internal successors, (562), 277 states have internal predecessors, (562), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:16:41,405 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 602 transitions. [2022-03-20 04:16:41,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 588 [2022-03-20 04:16:41,414 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:16:41,415 INFO L499 BasicCegarLoop]: trace histogram [288, 274, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:16:41,437 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 04:16:41,631 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 04:16:41,631 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:16:41,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:16:41,632 INFO L85 PathProgramCache]: Analyzing trace with hash -845736712, now seen corresponding path program 9 times [2022-03-20 04:16:41,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:16:41,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817344305] [2022-03-20 04:16:41,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:16:41,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:16:41,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:17:03,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 04:17:03,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:17:03,056 INFO L134 CoverageAnalysis]: Checked inductivity of 82944 backedges. 7425 proven. 75350 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-03-20 04:17:03,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:17:03,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817344305] [2022-03-20 04:17:03,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817344305] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:17:03,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738104722] [2022-03-20 04:17:03,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 04:17:03,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:17:03,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:17:03,058 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 04:17:03,095 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 04:17:03,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2022-03-20 04:17:03,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 04:17:03,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 04:17:03,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:17:05,991 INFO L134 CoverageAnalysis]: Checked inductivity of 82944 backedges. 7946 proven. 196 refuted. 0 times theorem prover too weak. 74802 trivial. 0 not checked. [2022-03-20 04:17:05,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:17:09,014 INFO L134 CoverageAnalysis]: Checked inductivity of 82944 backedges. 7946 proven. 196 refuted. 0 times theorem prover too weak. 74802 trivial. 0 not checked. [2022-03-20 04:17:09,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738104722] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 04:17:09,014 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 04:17:09,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [278, 17, 17] total 308 [2022-03-20 04:17:09,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241860470] [2022-03-20 04:17:09,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 04:17:09,016 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 308 states [2022-03-20 04:17:09,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:17:09,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 308 interpolants. [2022-03-20 04:17:09,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46973, Invalid=47583, Unknown=0, NotChecked=0, Total=94556 [2022-03-20 04:17:09,025 INFO L87 Difference]: Start difference. First operand 588 states and 602 transitions. Second operand has 308 states, 308 states have (on average 2.022727272727273) internal successors, (623), 307 states have internal predecessors, (623), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:17:43,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:17:43,033 INFO L93 Difference]: Finished difference Result 622 states and 652 transitions. [2022-03-20 04:17:43,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 308 states. [2022-03-20 04:17:43,040 INFO L78 Accepts]: Start accepts. Automaton has has 308 states, 308 states have (on average 2.022727272727273) internal successors, (623), 307 states have internal predecessors, (623), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 587 [2022-03-20 04:17:43,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:17:43,042 INFO L225 Difference]: With dead ends: 622 [2022-03-20 04:17:43,042 INFO L226 Difference]: Without dead ends: 622 [2022-03-20 04:17:43,057 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1786 GetRequests, 1175 SyntacticMatches, 0 SemanticMatches, 611 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46725 ImplicationChecksByTransitivity, 55.6s TimeCoverageRelationStatistics Valid=140913, Invalid=234243, Unknown=0, NotChecked=0, Total=375156 [2022-03-20 04:17:43,057 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 616 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 970 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 616 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 970 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 04:17:43,057 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [616 Valid, 53 Invalid, 1627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [970 Valid, 657 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 04:17:43,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2022-03-20 04:17:43,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 622. [2022-03-20 04:17:43,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 617 states have (on average 1.0502431118314424) internal successors, (648), 617 states have internal predecessors, (648), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:17:43,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 652 transitions. [2022-03-20 04:17:43,065 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 652 transitions. Word has length 587 [2022-03-20 04:17:43,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:17:43,065 INFO L478 AbstractCegarLoop]: Abstraction has 622 states and 652 transitions. [2022-03-20 04:17:43,066 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 308 states, 308 states have (on average 2.022727272727273) internal successors, (623), 307 states have internal predecessors, (623), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:17:43,066 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 652 transitions. [2022-03-20 04:17:43,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 622 [2022-03-20 04:17:43,073 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:17:43,074 INFO L499 BasicCegarLoop]: trace histogram [305, 275, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:17:43,093 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 04:17:43,283 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 04:17:43,283 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:17:43,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:17:43,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1496477562, now seen corresponding path program 10 times [2022-03-20 04:17:43,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:17:43,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089703497] [2022-03-20 04:17:43,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:17:43,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:17:43,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:18:05,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 04:18:05,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:18:05,147 INFO L134 CoverageAnalysis]: Checked inductivity of 93025 backedges. 16284 proven. 75900 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-03-20 04:18:05,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:18:05,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089703497] [2022-03-20 04:18:05,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089703497] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:18:05,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192930063] [2022-03-20 04:18:05,147 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 04:18:05,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:18:05,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:18:05,148 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 04:18:05,149 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 04:18:05,326 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 04:18:05,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 04:18:05,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 1333 conjuncts, 277 conjunts are in the unsatisfiable core [2022-03-20 04:18:05,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:18:06,408 INFO L134 CoverageAnalysis]: Checked inductivity of 93025 backedges. 16284 proven. 75900 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-03-20 04:18:06,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:19:09,774 INFO L134 CoverageAnalysis]: Checked inductivity of 93025 backedges. 16284 proven. 75900 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-03-20 04:19:09,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192930063] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 04:19:09,775 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 04:19:09,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [279, 278, 278] total 556 [2022-03-20 04:19:09,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647595150] [2022-03-20 04:19:09,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 04:19:09,776 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 556 states [2022-03-20 04:19:09,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:19:09,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 556 interpolants. [2022-03-20 04:19:09,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153737, Invalid=154843, Unknown=0, NotChecked=0, Total=308580 [2022-03-20 04:19:09,806 INFO L87 Difference]: Start difference. First operand 622 states and 652 transitions. Second operand has 556 states, 556 states have (on average 2.0107913669064748) internal successors, (1118), 555 states have internal predecessors, (1118), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:20:42,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:20:42,411 INFO L93 Difference]: Finished difference Result 1176 states and 1206 transitions. [2022-03-20 04:20:42,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 555 states. [2022-03-20 04:20:42,412 INFO L78 Accepts]: Start accepts. Automaton has has 556 states, 556 states have (on average 2.0107913669064748) internal successors, (1118), 555 states have internal predecessors, (1118), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 621 [2022-03-20 04:20:42,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:20:42,415 INFO L225 Difference]: With dead ends: 1176 [2022-03-20 04:20:42,415 INFO L226 Difference]: Without dead ends: 1176 [2022-03-20 04:20:42,483 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 2073 GetRequests, 967 SyntacticMatches, 0 SemanticMatches, 1106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191676 ImplicationChecksByTransitivity, 169.7s TimeCoverageRelationStatistics Valid=460098, Invalid=766458, Unknown=0, NotChecked=0, Total=1226556 [2022-03-20 04:20:42,483 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 560 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1163 mSolverCounterSat, 838 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 2001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 838 IncrementalHoareTripleChecker+Valid, 1163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 04:20:42,483 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [560 Valid, 59 Invalid, 2001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [838 Valid, 1163 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-20 04:20:42,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1176 states. [2022-03-20 04:20:42,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1176 to 1176. [2022-03-20 04:20:42,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1176 states, 1171 states have (on average 1.026473099914603) internal successors, (1202), 1171 states have internal predecessors, (1202), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:20:42,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 1206 transitions. [2022-03-20 04:20:42,495 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 1206 transitions. Word has length 621 [2022-03-20 04:20:42,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:20:42,496 INFO L478 AbstractCegarLoop]: Abstraction has 1176 states and 1206 transitions. [2022-03-20 04:20:42,497 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 556 states, 556 states have (on average 2.0107913669064748) internal successors, (1118), 555 states have internal predecessors, (1118), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:20:42,497 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 1206 transitions. [2022-03-20 04:20:42,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1176 [2022-03-20 04:20:42,506 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:20:42,506 INFO L499 BasicCegarLoop]: trace histogram [582, 552, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:20:42,525 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-03-20 04:20:42,723 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 04:20:42,723 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:20:42,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:20:42,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1282836636, now seen corresponding path program 11 times [2022-03-20 04:20:42,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:20:42,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044269863] [2022-03-20 04:20:42,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:20:42,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:20:43,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:22:08,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 04:22:08,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:22:08,094 INFO L134 CoverageAnalysis]: Checked inductivity of 338724 backedges. 32627 proven. 305256 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-03-20 04:22:08,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:22:08,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044269863] [2022-03-20 04:22:08,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044269863] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:22:08,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580366915] [2022-03-20 04:22:08,096 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 04:22:08,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:22:08,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:22:08,097 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 04:22:08,098 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 04:22:10,419 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 583 check-sat command(s) [2022-03-20 04:22:10,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 04:22:10,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 2441 conjuncts, 554 conjunts are in the unsatisfiable core [2022-03-20 04:22:10,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:22:12,178 INFO L134 CoverageAnalysis]: Checked inductivity of 338724 backedges. 32627 proven. 305256 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-03-20 04:22:12,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:26:36,417 INFO L134 CoverageAnalysis]: Checked inductivity of 338724 backedges. 32627 proven. 305256 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-03-20 04:26:36,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580366915] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 04:26:36,418 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 04:26:36,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [556, 555, 555] total 1110 [2022-03-20 04:26:36,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234595759] [2022-03-20 04:26:36,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 04:26:36,420 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 1110 states [2022-03-20 04:26:36,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:26:36,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 1110 interpolants. [2022-03-20 04:26:36,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=614388, Invalid=616602, Unknown=0, NotChecked=0, Total=1230990 [2022-03-20 04:26:36,648 INFO L87 Difference]: Start difference. First operand 1176 states and 1206 transitions. Second operand has 1110 states, 1110 states have (on average 2.0054054054054054) internal successors, (2226), 1109 states have internal predecessors, (2226), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)