/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/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/theatreSquare.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7390193 [2022-04-05 06:14:12,123 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-05 06:14:12,124 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-05 06:14:12,168 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-05 06:14:12,169 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-05 06:14:12,170 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-05 06:14:12,172 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-05 06:14:12,180 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-05 06:14:12,181 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-05 06:14:12,181 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-05 06:14:12,182 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-05 06:14:12,183 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-05 06:14:12,183 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-05 06:14:12,184 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-05 06:14:12,185 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-05 06:14:12,187 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-05 06:14:12,188 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-05 06:14:12,191 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-05 06:14:12,192 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-05 06:14:12,193 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-05 06:14:12,194 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-05 06:14:12,194 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-05 06:14:12,195 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-05 06:14:12,195 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-05 06:14:12,196 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-05 06:14:12,197 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-05 06:14:12,201 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-05 06:14:12,202 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-05 06:14:12,206 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-05 06:14:12,206 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-04-05 06:14:12,223 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-05 06:14:12,223 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-05 06:14:12,224 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-05 06:14:12,224 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-05 06:14:12,225 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-05 06:14:12,225 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-05 06:14:12,225 INFO L138 SettingsManager]: * Use SBE=true [2022-04-05 06:14:12,225 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-05 06:14:12,225 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-05 06:14:12,226 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-05 06:14:12,226 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-05 06:14:12,226 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-05 06:14:12,226 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-05 06:14:12,226 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-05 06:14:12,226 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-05 06:14:12,226 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-05 06:14:12,226 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-05 06:14:12,226 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-05 06:14:12,226 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-05 06:14:12,226 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 06:14:12,226 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-05 06:14:12,227 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-05 06:14:12,227 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-05 06:14:12,227 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-05 06:14:12,227 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-05 06:14:12,227 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-05 06:14:12,227 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-05 06:14:12,227 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-05 06:14:12,228 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-05 06:14:12,228 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-05 06:14:12,425 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-05 06:14:12,443 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-05 06:14:12,445 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-05 06:14:12,446 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-05 06:14:12,446 INFO L275 PluginConnector]: CDTParser initialized [2022-04-05 06:14:12,447 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/theatreSquare.c [2022-04-05 06:14:12,506 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a016d3d5/d586483ae72a4db9b5e7879ad3968882/FLAG2d271c753 [2022-04-05 06:14:12,895 INFO L306 CDTParser]: Found 1 translation units. [2022-04-05 06:14:12,896 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/theatreSquare.c [2022-04-05 06:14:12,901 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a016d3d5/d586483ae72a4db9b5e7879ad3968882/FLAG2d271c753 [2022-04-05 06:14:12,912 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a016d3d5/d586483ae72a4db9b5e7879ad3968882 [2022-04-05 06:14:12,914 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-05 06:14:12,915 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-05 06:14:12,917 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-05 06:14:12,917 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-05 06:14:12,920 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-05 06:14:12,920 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 06:14:12" (1/1) ... [2022-04-05 06:14:12,921 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24d0857a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 06:14:12, skipping insertion in model container [2022-04-05 06:14:12,922 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 06:14:12" (1/1) ... [2022-04-05 06:14:12,927 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-05 06:14:12,948 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-05 06:14:13,124 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/theatreSquare.c[370,383] [2022-04-05 06:14:13,157 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 06:14:13,164 INFO L203 MainTranslator]: Completed pre-run [2022-04-05 06:14:13,173 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/theatreSquare.c[370,383] [2022-04-05 06:14:13,179 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 06:14:13,187 INFO L208 MainTranslator]: Completed translation [2022-04-05 06:14:13,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 06:14:13 WrapperNode [2022-04-05 06:14:13,188 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-05 06:14:13,190 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-05 06:14:13,190 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-05 06:14:13,190 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-05 06:14:13,197 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 06:14:13" (1/1) ... [2022-04-05 06:14:13,197 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 06:14:13" (1/1) ... [2022-04-05 06:14:13,202 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 06:14:13" (1/1) ... [2022-04-05 06:14:13,202 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 06:14:13" (1/1) ... [2022-04-05 06:14:13,207 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 06:14:13" (1/1) ... [2022-04-05 06:14:13,226 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 06:14:13" (1/1) ... [2022-04-05 06:14:13,227 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 06:14:13" (1/1) ... [2022-04-05 06:14:13,229 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-05 06:14:13,229 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-05 06:14:13,229 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-05 06:14:13,229 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-05 06:14:13,230 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 06:14:13" (1/1) ... [2022-04-05 06:14:13,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 06:14:13,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:14:13,298 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) [2022-04-05 06:14:13,303 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 [2022-04-05 06:14:13,329 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-05 06:14:13,330 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-05 06:14:13,330 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-05 06:14:13,331 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-05 06:14:13,331 INFO L138 BoogieDeclarations]: Found implementation of procedure correct_version [2022-04-05 06:14:13,331 INFO L138 BoogieDeclarations]: Found implementation of procedure student_version [2022-04-05 06:14:13,331 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-05 06:14:13,332 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-05 06:14:13,333 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-05 06:14:13,333 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-05 06:14:13,333 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-05 06:14:13,333 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-05 06:14:13,334 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-05 06:14:13,334 INFO L130 BoogieDeclarations]: Found specification of procedure correct_version [2022-04-05 06:14:13,334 INFO L130 BoogieDeclarations]: Found specification of procedure student_version [2022-04-05 06:14:13,334 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-05 06:14:13,337 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-05 06:14:13,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-05 06:14:13,337 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-05 06:14:13,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-05 06:14:13,338 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-05 06:14:13,338 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-05 06:14:13,392 INFO L234 CfgBuilder]: Building ICFG [2022-04-05 06:14:13,393 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-05 06:14:13,546 INFO L275 CfgBuilder]: Performing block encoding [2022-04-05 06:14:13,550 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-05 06:14:13,550 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-04-05 06:14:13,552 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 06:14:13 BoogieIcfgContainer [2022-04-05 06:14:13,552 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-05 06:14:13,553 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-05 06:14:13,553 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-05 06:14:13,554 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-05 06:14:13,556 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 06:14:13" (1/1) ... [2022-04-05 06:14:13,558 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-04-05 06:14:13,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 06:14:13 BasicIcfg [2022-04-05 06:14:13,575 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-05 06:14:13,577 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-05 06:14:13,577 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-05 06:14:13,579 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-05 06:14:13,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.04 06:14:12" (1/4) ... [2022-04-05 06:14:13,580 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d22ad6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 06:14:13, skipping insertion in model container [2022-04-05 06:14:13,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 06:14:13" (2/4) ... [2022-04-05 06:14:13,580 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d22ad6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 06:14:13, skipping insertion in model container [2022-04-05 06:14:13,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 06:14:13" (3/4) ... [2022-04-05 06:14:13,580 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d22ad6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 06:14:13, skipping insertion in model container [2022-04-05 06:14:13,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 06:14:13" (4/4) ... [2022-04-05 06:14:13,581 INFO L111 eAbstractionObserver]: Analyzing ICFG theatreSquare.cqvasr [2022-04-05 06:14:13,585 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-05 06:14:13,586 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-05 06:14:13,648 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-05 06:14:13,656 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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 [2022-04-05 06:14:13,657 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-05 06:14:13,674 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 28 states have internal predecessors, (42), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-05 06:14:13,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-04-05 06:14:13,678 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:14:13,679 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:14:13,679 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:14:13,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:14:13,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1121522138, now seen corresponding path program 1 times [2022-04-05 06:14:13,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:14:13,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849480291] [2022-04-05 06:14:13,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:14:13,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:14:13,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:13,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:14:13,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:13,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:14:13,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:14:13,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849480291] [2022-04-05 06:14:13,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849480291] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 06:14:13,949 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 06:14:13,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-05 06:14:13,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115880600] [2022-04-05 06:14:13,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 06:14:13,954 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-05 06:14:13,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:14:13,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-05 06:14:13,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-05 06:14:13,982 INFO L87 Difference]: Start difference. First operand has 39 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 28 states have internal predecessors, (42), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 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) [2022-04-05 06:14:14,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:14:14,196 INFO L93 Difference]: Finished difference Result 76 states and 103 transitions. [2022-04-05 06:14:14,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-05 06:14:14,197 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 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 [2022-04-05 06:14:14,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:14:14,201 INFO L225 Difference]: With dead ends: 76 [2022-04-05 06:14:14,201 INFO L226 Difference]: Without dead ends: 32 [2022-04-05 06:14:14,203 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-04-05 06:14:14,205 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 46 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 06:14:14,206 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 61 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 06:14:14,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-04-05 06:14:14,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-04-05 06:14:14,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-05 06:14:14,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2022-04-05 06:14:14,228 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 11 [2022-04-05 06:14:14,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:14:14,228 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2022-04-05 06:14:14,228 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 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) [2022-04-05 06:14:14,228 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2022-04-05 06:14:14,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-05 06:14:14,229 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:14:14,229 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:14:14,230 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-05 06:14:14,230 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:14:14,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:14:14,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1342094697, now seen corresponding path program 1 times [2022-04-05 06:14:14,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:14:14,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171744608] [2022-04-05 06:14:14,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:14:14,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:14:14,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:14,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:14:14,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:14,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:14:14,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:14,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-05 06:14:14,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:14,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:14:14,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:14:14,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171744608] [2022-04-05 06:14:14,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171744608] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 06:14:14,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 06:14:14,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-05 06:14:14,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781939136] [2022-04-05 06:14:14,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 06:14:14,506 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-05 06:14:14,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:14:14,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-05 06:14:14,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-04-05 06:14:14,507 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:14:14,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:14:14,915 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2022-04-05 06:14:14,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-05 06:14:14,916 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2022-04-05 06:14:14,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:14:14,919 INFO L225 Difference]: With dead ends: 50 [2022-04-05 06:14:14,919 INFO L226 Difference]: Without dead ends: 44 [2022-04-05 06:14:14,920 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-04-05 06:14:14,921 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 42 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 06:14:14,922 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 80 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 06:14:14,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-04-05 06:14:14,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2022-04-05 06:14:14,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 32 states have internal predecessors, (38), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-05 06:14:14,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2022-04-05 06:14:14,931 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 31 [2022-04-05 06:14:14,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:14:14,932 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2022-04-05 06:14:14,932 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:14:14,932 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2022-04-05 06:14:14,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-05 06:14:14,933 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:14:14,934 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:14:14,934 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-05 06:14:14,934 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:14:14,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:14:14,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1260090278, now seen corresponding path program 1 times [2022-04-05 06:14:14,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:14:14,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626390238] [2022-04-05 06:14:14,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:14:14,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:14:14,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:14,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:14:14,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:14,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:14:14,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:14,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-05 06:14:14,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:14,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:14:14,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:14:14,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626390238] [2022-04-05 06:14:14,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626390238] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 06:14:14,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 06:14:14,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 06:14:14,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297367676] [2022-04-05 06:14:14,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 06:14:14,993 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 06:14:14,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:14:14,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 06:14:14,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-05 06:14:14,994 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-05 06:14:15,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:14:15,090 INFO L93 Difference]: Finished difference Result 59 states and 71 transitions. [2022-04-05 06:14:15,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-05 06:14:15,091 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 32 [2022-04-05 06:14:15,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:14:15,093 INFO L225 Difference]: With dead ends: 59 [2022-04-05 06:14:15,093 INFO L226 Difference]: Without dead ends: 49 [2022-04-05 06:14:15,095 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-04-05 06:14:15,099 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 44 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 06:14:15,099 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 45 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 06:14:15,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-04-05 06:14:15,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2022-04-05 06:14:15,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 36 states have internal predecessors, (44), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-05 06:14:15,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2022-04-05 06:14:15,108 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 32 [2022-04-05 06:14:15,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:14:15,108 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2022-04-05 06:14:15,109 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-05 06:14:15,109 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2022-04-05 06:14:15,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-05 06:14:15,110 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:14:15,110 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:14:15,110 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-04-05 06:14:15,110 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:14:15,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:14:15,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1332613463, now seen corresponding path program 1 times [2022-04-05 06:14:15,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:14:15,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101490895] [2022-04-05 06:14:15,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:14:15,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:14:15,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:15,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:14:15,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:15,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:14:15,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:15,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-05 06:14:15,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:15,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:14:15,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:14:15,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101490895] [2022-04-05 06:14:15,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101490895] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 06:14:15,163 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 06:14:15,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 06:14:15,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105859658] [2022-04-05 06:14:15,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 06:14:15,164 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 06:14:15,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:14:15,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 06:14:15,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-05 06:14:15,165 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:14:15,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:14:15,228 INFO L93 Difference]: Finished difference Result 81 states and 100 transitions. [2022-04-05 06:14:15,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-05 06:14:15,229 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 32 [2022-04-05 06:14:15,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:14:15,230 INFO L225 Difference]: With dead ends: 81 [2022-04-05 06:14:15,230 INFO L226 Difference]: Without dead ends: 53 [2022-04-05 06:14:15,230 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-04-05 06:14:15,231 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 44 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 06:14:15,231 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 45 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 06:14:15,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-04-05 06:14:15,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2022-04-05 06:14:15,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 38 states have (on average 1.3157894736842106) internal successors, (50), 40 states have internal predecessors, (50), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-05 06:14:15,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2022-04-05 06:14:15,239 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 32 [2022-04-05 06:14:15,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:14:15,239 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2022-04-05 06:14:15,239 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:14:15,239 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2022-04-05 06:14:15,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-05 06:14:15,240 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:14:15,240 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:14:15,240 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-04-05 06:14:15,241 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:14:15,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:14:15,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1056043469, now seen corresponding path program 1 times [2022-04-05 06:14:15,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:14:15,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512260509] [2022-04-05 06:14:15,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:14:15,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:14:15,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:15,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:14:15,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:15,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:14:15,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:15,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-05 06:14:15,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:15,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 06:14:15,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:14:15,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512260509] [2022-04-05 06:14:15,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512260509] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 06:14:15,305 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 06:14:15,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-05 06:14:15,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091666573] [2022-04-05 06:14:15,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 06:14:15,306 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-05 06:14:15,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:14:15,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-05 06:14:15,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-05 06:14:15,306 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-05 06:14:15,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:14:15,403 INFO L93 Difference]: Finished difference Result 77 states and 93 transitions. [2022-04-05 06:14:15,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-05 06:14:15,403 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 33 [2022-04-05 06:14:15,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:14:15,404 INFO L225 Difference]: With dead ends: 77 [2022-04-05 06:14:15,404 INFO L226 Difference]: Without dead ends: 47 [2022-04-05 06:14:15,405 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-04-05 06:14:15,405 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 44 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 06:14:15,406 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 50 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 06:14:15,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-04-05 06:14:15,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-04-05 06:14:15,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 37 states have internal predecessors, (45), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-05 06:14:15,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 57 transitions. [2022-04-05 06:14:15,426 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 57 transitions. Word has length 33 [2022-04-05 06:14:15,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:14:15,427 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 57 transitions. [2022-04-05 06:14:15,427 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-05 06:14:15,427 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 57 transitions. [2022-04-05 06:14:15,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-05 06:14:15,428 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:14:15,428 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:14:15,428 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-04-05 06:14:15,428 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:14:15,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:14:15,428 INFO L85 PathProgramCache]: Analyzing trace with hash -934524560, now seen corresponding path program 1 times [2022-04-05 06:14:15,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:14:15,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590503787] [2022-04-05 06:14:15,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:14:15,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:14:15,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:15,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:14:15,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:15,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:14:15,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:15,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-05 06:14:15,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:15,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 06:14:15,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:14:15,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590503787] [2022-04-05 06:14:15,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590503787] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 06:14:15,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 06:14:15,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-05 06:14:15,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076670990] [2022-04-05 06:14:15,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 06:14:15,483 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-05 06:14:15,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:14:15,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-05 06:14:15,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-05 06:14:15,484 INFO L87 Difference]: Start difference. First operand 47 states and 57 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-05 06:14:15,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:14:15,565 INFO L93 Difference]: Finished difference Result 83 states and 102 transitions. [2022-04-05 06:14:15,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-05 06:14:15,566 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 33 [2022-04-05 06:14:15,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:14:15,567 INFO L225 Difference]: With dead ends: 83 [2022-04-05 06:14:15,567 INFO L226 Difference]: Without dead ends: 48 [2022-04-05 06:14:15,568 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-04-05 06:14:15,568 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 41 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 06:14:15,569 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 50 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 06:14:15,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-04-05 06:14:15,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-04-05 06:14:15,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 38 states have internal predecessors, (46), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-05 06:14:15,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2022-04-05 06:14:15,575 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 33 [2022-04-05 06:14:15,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:14:15,575 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2022-04-05 06:14:15,575 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-05 06:14:15,575 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2022-04-05 06:14:15,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-05 06:14:15,576 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:14:15,576 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:14:15,577 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-04-05 06:14:15,577 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:14:15,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:14:15,577 INFO L85 PathProgramCache]: Analyzing trace with hash 183625953, now seen corresponding path program 1 times [2022-04-05 06:14:15,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:14:15,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982351551] [2022-04-05 06:14:15,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:14:15,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:14:15,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:15,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:14:15,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:15,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:14:15,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:15,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-05 06:14:15,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:15,634 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-05 06:14:15,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:14:15,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982351551] [2022-04-05 06:14:15,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982351551] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 06:14:15,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 06:14:15,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-05 06:14:15,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2693460] [2022-04-05 06:14:15,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 06:14:15,635 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-05 06:14:15,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:14:15,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-05 06:14:15,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-05 06:14:15,636 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:14:15,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:14:15,718 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2022-04-05 06:14:15,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-05 06:14:15,719 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 34 [2022-04-05 06:14:15,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:14:15,719 INFO L225 Difference]: With dead ends: 57 [2022-04-05 06:14:15,719 INFO L226 Difference]: Without dead ends: 45 [2022-04-05 06:14:15,720 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-04-05 06:14:15,721 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 43 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 06:14:15,721 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 50 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 06:14:15,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-04-05 06:14:15,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-04-05 06:14:15,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 35 states have internal predecessors, (41), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-05 06:14:15,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2022-04-05 06:14:15,726 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 34 [2022-04-05 06:14:15,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:14:15,727 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2022-04-05 06:14:15,727 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:14:15,727 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2022-04-05 06:14:15,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-04-05 06:14:15,728 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:14:15,728 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:14:15,728 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-04-05 06:14:15,728 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:14:15,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:14:15,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1980049385, now seen corresponding path program 1 times [2022-04-05 06:14:15,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:14:15,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018346800] [2022-04-05 06:14:15,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:14:15,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:14:15,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:15,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:14:15,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:15,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:14:15,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:15,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-05 06:14:15,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:15,781 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-05 06:14:15,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:14:15,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018346800] [2022-04-05 06:14:15,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018346800] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 06:14:15,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 06:14:15,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-05 06:14:15,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57082054] [2022-04-05 06:14:15,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 06:14:15,783 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-05 06:14:15,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:14:15,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-05 06:14:15,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-04-05 06:14:15,784 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:14:15,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:14:15,848 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2022-04-05 06:14:15,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-05 06:14:15,849 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2022-04-05 06:14:15,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:14:15,849 INFO L225 Difference]: With dead ends: 64 [2022-04-05 06:14:15,849 INFO L226 Difference]: Without dead ends: 40 [2022-04-05 06:14:15,850 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-04-05 06:14:15,850 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 34 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 06:14:15,850 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 49 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 06:14:15,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-04-05 06:14:15,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2022-04-05 06:14:15,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-05 06:14:15,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2022-04-05 06:14:15,855 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 35 [2022-04-05 06:14:15,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:14:15,855 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2022-04-05 06:14:15,855 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:14:15,855 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2022-04-05 06:14:15,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-04-05 06:14:15,856 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:14:15,856 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:14:15,856 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-04-05 06:14:15,856 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:14:15,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:14:15,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1683932512, now seen corresponding path program 1 times [2022-04-05 06:14:15,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:14:15,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7740557] [2022-04-05 06:14:15,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:14:15,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:14:15,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:15,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:14:15,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:15,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:14:15,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:15,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-05 06:14:15,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:15,900 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-05 06:14:15,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:14:15,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7740557] [2022-04-05 06:14:15,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7740557] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 06:14:15,901 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 06:14:15,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-05 06:14:15,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725744392] [2022-04-05 06:14:15,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 06:14:15,901 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-05 06:14:15,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:14:15,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-05 06:14:15,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-04-05 06:14:15,902 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:14:15,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:14:15,967 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2022-04-05 06:14:15,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-05 06:14:15,967 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2022-04-05 06:14:15,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:14:15,968 INFO L225 Difference]: With dead ends: 46 [2022-04-05 06:14:15,968 INFO L226 Difference]: Without dead ends: 37 [2022-04-05 06:14:15,968 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-04-05 06:14:15,969 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 41 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 06:14:15,969 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 49 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 06:14:15,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-04-05 06:14:15,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-04-05 06:14:15,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-05 06:14:15,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2022-04-05 06:14:15,972 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 35 [2022-04-05 06:14:15,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:14:15,972 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2022-04-05 06:14:15,972 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:14:15,973 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2022-04-05 06:14:15,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-05 06:14:15,973 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:14:15,973 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:14:15,973 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-04-05 06:14:15,973 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:14:15,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:14:15,974 INFO L85 PathProgramCache]: Analyzing trace with hash 577653245, now seen corresponding path program 1 times [2022-04-05 06:14:15,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:14:15,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260511991] [2022-04-05 06:14:15,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:14:15,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:14:15,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:15,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:14:15,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:15,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:14:15,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:16,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-05 06:14:16,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:16,013 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-04-05 06:14:16,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:14:16,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260511991] [2022-04-05 06:14:16,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260511991] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 06:14:16,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 06:14:16,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-05 06:14:16,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864016914] [2022-04-05 06:14:16,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 06:14:16,015 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-05 06:14:16,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:14:16,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-05 06:14:16,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-05 06:14:16,015 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:14:16,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:14:16,076 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2022-04-05 06:14:16,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-05 06:14:16,077 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2022-04-05 06:14:16,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:14:16,077 INFO L225 Difference]: With dead ends: 50 [2022-04-05 06:14:16,077 INFO L226 Difference]: Without dead ends: 38 [2022-04-05 06:14:16,078 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-04-05 06:14:16,078 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 40 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 06:14:16,079 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 50 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 06:14:16,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-04-05 06:14:16,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-04-05 06:14:16,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-05 06:14:16,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2022-04-05 06:14:16,088 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 36 [2022-04-05 06:14:16,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:14:16,088 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2022-04-05 06:14:16,088 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:14:16,088 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2022-04-05 06:14:16,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-05 06:14:16,091 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:14:16,091 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:14:16,092 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-04-05 06:14:16,092 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:14:16,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:14:16,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1698211422, now seen corresponding path program 1 times [2022-04-05 06:14:16,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:14:16,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780344410] [2022-04-05 06:14:16,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:14:16,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:14:16,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:16,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:14:16,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:16,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:14:16,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:16,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-05 06:14:16,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:16,353 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 06:14:16,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:14:16,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780344410] [2022-04-05 06:14:16,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780344410] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:14:16,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249526378] [2022-04-05 06:14:16,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:14:16,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:14:16,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:14:16,369 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) [2022-04-05 06:14:16,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-05 06:14:16,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:16,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 31 conjunts are in the unsatisfiable core [2022-04-05 06:14:16,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:14:16,811 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 06:14:16,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:14:17,026 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 06:14:17,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249526378] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:14:17,026 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:14:17,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 25 [2022-04-05 06:14:17,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050363994] [2022-04-05 06:14:17,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:14:17,027 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-05 06:14:17,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:14:17,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-05 06:14:17,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2022-04-05 06:14:17,028 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 25 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 19 states have internal predecessors, (37), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:14:17,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:14:17,554 INFO L93 Difference]: Finished difference Result 70 states and 83 transitions. [2022-04-05 06:14:17,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-05 06:14:17,555 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 19 states have internal predecessors, (37), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 37 [2022-04-05 06:14:17,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:14:17,555 INFO L225 Difference]: With dead ends: 70 [2022-04-05 06:14:17,555 INFO L226 Difference]: Without dead ends: 64 [2022-04-05 06:14:17,556 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 68 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=157, Invalid=1565, Unknown=0, NotChecked=0, Total=1722 [2022-04-05 06:14:17,557 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 69 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-05 06:14:17,557 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 113 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-05 06:14:17,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-04-05 06:14:17,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 54. [2022-04-05 06:14:17,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 44 states have internal predecessors, (52), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-05 06:14:17,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2022-04-05 06:14:17,564 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 37 [2022-04-05 06:14:17,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:14:17,564 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2022-04-05 06:14:17,564 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 19 states have internal predecessors, (37), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:14:17,564 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2022-04-05 06:14:17,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-05 06:14:17,565 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:14:17,565 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:14:17,604 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-04-05 06:14:17,767 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-04-05 06:14:17,768 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:14:17,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:14:17,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1189593605, now seen corresponding path program 2 times [2022-04-05 06:14:17,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:14:17,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131509855] [2022-04-05 06:14:17,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:14:17,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:14:17,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:17,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:14:17,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:17,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:14:17,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:17,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-05 06:14:17,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:17,829 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:14:17,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:14:17,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131509855] [2022-04-05 06:14:17,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131509855] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:14:17,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747275715] [2022-04-05 06:14:17,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 06:14:17,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:14:17,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:14:17,844 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) [2022-04-05 06:14:17,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-05 06:14:17,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 06:14:17,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:14:17,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-05 06:14:17,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:14:17,982 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:14:17,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:14:18,049 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:14:18,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747275715] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:14:18,051 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:14:18,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 9 [2022-04-05 06:14:18,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509851028] [2022-04-05 06:14:18,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:14:18,052 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-05 06:14:18,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:14:18,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-05 06:14:18,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-04-05 06:14:18,052 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-05 06:14:18,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:14:18,152 INFO L93 Difference]: Finished difference Result 80 states and 97 transitions. [2022-04-05 06:14:18,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-05 06:14:18,153 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 38 [2022-04-05 06:14:18,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:14:18,154 INFO L225 Difference]: With dead ends: 80 [2022-04-05 06:14:18,154 INFO L226 Difference]: Without dead ends: 70 [2022-04-05 06:14:18,154 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-04-05 06:14:18,155 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 54 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 06:14:18,155 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 49 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 06:14:18,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-04-05 06:14:18,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2022-04-05 06:14:18,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 52 states have (on average 1.25) internal successors, (65), 54 states have internal predecessors, (65), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-05 06:14:18,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2022-04-05 06:14:18,169 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 38 [2022-04-05 06:14:18,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:14:18,170 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2022-04-05 06:14:18,170 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-05 06:14:18,170 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2022-04-05 06:14:18,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-05 06:14:18,171 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:14:18,172 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:14:18,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-05 06:14:18,391 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,SelfDestructingSolverStorable11 [2022-04-05 06:14:18,392 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:14:18,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:14:18,393 INFO L85 PathProgramCache]: Analyzing trace with hash 764427933, now seen corresponding path program 3 times [2022-04-05 06:14:18,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:14:18,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715564530] [2022-04-05 06:14:18,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:14:18,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:14:18,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:18,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:14:18,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:18,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:14:18,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:18,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-05 06:14:18,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:18,525 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:14:18,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:14:18,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715564530] [2022-04-05 06:14:18,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715564530] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:14:18,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757617581] [2022-04-05 06:14:18,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 06:14:18,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:14:18,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:14:18,540 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) [2022-04-05 06:14:18,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-05 06:14:18,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-04-05 06:14:18,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:14:18,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-05 06:14:18,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:14:18,729 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:14:18,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:14:18,915 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:14:18,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757617581] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:14:18,915 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:14:18,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 19 [2022-04-05 06:14:18,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836729684] [2022-04-05 06:14:18,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:14:18,918 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-05 06:14:18,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:14:18,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-05 06:14:18,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-04-05 06:14:18,919 INFO L87 Difference]: Start difference. First operand 64 states and 77 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:14:19,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:14:19,191 INFO L93 Difference]: Finished difference Result 82 states and 100 transitions. [2022-04-05 06:14:19,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-05 06:14:19,191 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 38 [2022-04-05 06:14:19,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:14:19,192 INFO L225 Difference]: With dead ends: 82 [2022-04-05 06:14:19,192 INFO L226 Difference]: Without dead ends: 76 [2022-04-05 06:14:19,193 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2022-04-05 06:14:19,193 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 90 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 06:14:19,194 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 76 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 06:14:19,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-04-05 06:14:19,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2022-04-05 06:14:19,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 59 states have (on average 1.2542372881355932) internal successors, (74), 63 states have internal predecessors, (74), 7 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-04-05 06:14:19,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 91 transitions. [2022-04-05 06:14:19,205 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 91 transitions. Word has length 38 [2022-04-05 06:14:19,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:14:19,206 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 91 transitions. [2022-04-05 06:14:19,206 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:14:19,206 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 91 transitions. [2022-04-05 06:14:19,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-05 06:14:19,206 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:14:19,207 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:14:19,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-05 06:14:19,427 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:14:19,428 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:14:19,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:14:19,428 INFO L85 PathProgramCache]: Analyzing trace with hash -781171018, now seen corresponding path program 4 times [2022-04-05 06:14:19,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:14:19,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430161239] [2022-04-05 06:14:19,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:14:19,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:14:19,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:19,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:14:19,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:19,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:14:19,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:19,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-05 06:14:19,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:19,494 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:14:19,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:14:19,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430161239] [2022-04-05 06:14:19,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430161239] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:14:19,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202558158] [2022-04-05 06:14:19,494 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 06:14:19,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:14:19,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:14:19,512 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) [2022-04-05 06:14:19,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-05 06:14:19,561 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 06:14:19,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:14:19,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-05 06:14:19,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:14:19,649 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:14:19,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:14:19,714 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:14:19,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202558158] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:14:19,715 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:14:19,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 9 [2022-04-05 06:14:19,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15179877] [2022-04-05 06:14:19,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:14:19,715 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-05 06:14:19,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:14:19,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-05 06:14:19,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-04-05 06:14:19,716 INFO L87 Difference]: Start difference. First operand 74 states and 91 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:14:19,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:14:19,819 INFO L93 Difference]: Finished difference Result 140 states and 174 transitions. [2022-04-05 06:14:19,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-05 06:14:19,820 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 38 [2022-04-05 06:14:19,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:14:19,821 INFO L225 Difference]: With dead ends: 140 [2022-04-05 06:14:19,821 INFO L226 Difference]: Without dead ends: 90 [2022-04-05 06:14:19,823 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-04-05 06:14:19,824 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 42 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 06:14:19,824 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 49 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 06:14:19,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-04-05 06:14:19,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 84. [2022-04-05 06:14:19,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 69 states have (on average 1.2608695652173914) internal successors, (87), 73 states have internal predecessors, (87), 7 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-04-05 06:14:19,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 104 transitions. [2022-04-05 06:14:19,837 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 104 transitions. Word has length 38 [2022-04-05 06:14:19,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:14:19,837 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 104 transitions. [2022-04-05 06:14:19,838 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:14:19,838 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 104 transitions. [2022-04-05 06:14:19,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-05 06:14:19,838 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:14:19,838 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:14:19,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-05 06:14:20,059 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:14:20,060 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:14:20,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:14:20,060 INFO L85 PathProgramCache]: Analyzing trace with hash -910305133, now seen corresponding path program 5 times [2022-04-05 06:14:20,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:14:20,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537814396] [2022-04-05 06:14:20,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:14:20,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:14:20,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:20,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:14:20,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:20,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:14:20,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:20,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-05 06:14:20,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:20,165 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:14:20,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:14:20,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537814396] [2022-04-05 06:14:20,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537814396] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:14:20,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7604948] [2022-04-05 06:14:20,166 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 06:14:20,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:14:20,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:14:20,180 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) [2022-04-05 06:14:20,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-05 06:14:20,248 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 06:14:20,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:14:20,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-05 06:14:20,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:14:20,404 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:14:20,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:14:20,626 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:14:20,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7604948] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:14:20,626 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:14:20,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 19 [2022-04-05 06:14:20,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399680950] [2022-04-05 06:14:20,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:14:20,627 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-05 06:14:20,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:14:20,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-05 06:14:20,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-04-05 06:14:20,628 INFO L87 Difference]: Start difference. First operand 84 states and 104 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:14:20,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:14:20,929 INFO L93 Difference]: Finished difference Result 92 states and 111 transitions. [2022-04-05 06:14:20,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-05 06:14:20,929 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 38 [2022-04-05 06:14:20,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:14:20,930 INFO L225 Difference]: With dead ends: 92 [2022-04-05 06:14:20,930 INFO L226 Difference]: Without dead ends: 86 [2022-04-05 06:14:20,932 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2022-04-05 06:14:20,933 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 81 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 06:14:20,933 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 95 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 06:14:20,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-04-05 06:14:20,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2022-04-05 06:14:20,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 69 states have (on average 1.2608695652173914) internal successors, (87), 73 states have internal predecessors, (87), 7 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-04-05 06:14:20,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 102 transitions. [2022-04-05 06:14:20,943 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 102 transitions. Word has length 38 [2022-04-05 06:14:20,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:14:20,943 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 102 transitions. [2022-04-05 06:14:20,943 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:14:20,944 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 102 transitions. [2022-04-05 06:14:20,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-05 06:14:20,944 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:14:20,944 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:14:20,982 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-04-05 06:14:21,179 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-04-05 06:14:21,180 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:14:21,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:14:21,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1615543558, now seen corresponding path program 6 times [2022-04-05 06:14:21,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:14:21,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576674072] [2022-04-05 06:14:21,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:14:21,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:14:21,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:21,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:14:21,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:21,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:14:21,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:21,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-05 06:14:21,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:21,317 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:14:21,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:14:21,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576674072] [2022-04-05 06:14:21,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576674072] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:14:21,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52719314] [2022-04-05 06:14:21,317 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-05 06:14:21,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:14:21,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:14:21,332 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) [2022-04-05 06:14:21,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-05 06:14:21,389 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-04-05 06:14:21,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:14:21,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-05 06:14:21,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:14:21,541 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-05 06:14:21,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:14:21,771 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-05 06:14:21,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52719314] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:14:21,772 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:14:21,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 21 [2022-04-05 06:14:21,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639222451] [2022-04-05 06:14:21,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:14:21,772 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-05 06:14:21,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:14:21,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-05 06:14:21,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-04-05 06:14:21,773 INFO L87 Difference]: Start difference. First operand 84 states and 102 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:14:22,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:14:22,074 INFO L93 Difference]: Finished difference Result 108 states and 128 transitions. [2022-04-05 06:14:22,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-05 06:14:22,075 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2022-04-05 06:14:22,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:14:22,076 INFO L225 Difference]: With dead ends: 108 [2022-04-05 06:14:22,076 INFO L226 Difference]: Without dead ends: 94 [2022-04-05 06:14:22,076 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2022-04-05 06:14:22,077 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 109 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 06:14:22,077 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 89 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 06:14:22,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-04-05 06:14:22,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 89. [2022-04-05 06:14:22,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 71 states have (on average 1.2394366197183098) internal successors, (88), 77 states have internal predecessors, (88), 8 states have call successors, (8), 5 states have call predecessors, (8), 9 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2022-04-05 06:14:22,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 107 transitions. [2022-04-05 06:14:22,085 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 107 transitions. Word has length 39 [2022-04-05 06:14:22,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:14:22,085 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 107 transitions. [2022-04-05 06:14:22,085 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:14:22,085 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 107 transitions. [2022-04-05 06:14:22,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-05 06:14:22,086 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:14:22,086 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:14:22,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-05 06:14:22,295 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-04-05 06:14:22,296 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:14:22,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:14:22,296 INFO L85 PathProgramCache]: Analyzing trace with hash -580280884, now seen corresponding path program 7 times [2022-04-05 06:14:22,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:14:22,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007297755] [2022-04-05 06:14:22,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:14:22,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:14:22,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:22,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:14:22,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:22,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:14:22,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:22,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-05 06:14:22,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:22,522 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 06:14:22,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:14:22,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007297755] [2022-04-05 06:14:22,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007297755] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:14:22,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309372050] [2022-04-05 06:14:22,522 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-05 06:14:22,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:14:22,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:14:22,523 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) [2022-04-05 06:14:22,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-05 06:14:22,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:22,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-05 06:14:22,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:14:22,828 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 06:14:22,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:14:22,990 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 06:14:22,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309372050] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:14:22,990 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:14:22,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 27 [2022-04-05 06:14:22,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165296874] [2022-04-05 06:14:22,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:14:22,992 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-05 06:14:22,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:14:22,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-05 06:14:22,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=641, Unknown=0, NotChecked=0, Total=702 [2022-04-05 06:14:22,993 INFO L87 Difference]: Start difference. First operand 89 states and 107 transitions. Second operand has 27 states, 24 states have (on average 1.625) internal successors, (39), 21 states have internal predecessors, (39), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:14:23,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:14:23,696 INFO L93 Difference]: Finished difference Result 137 states and 170 transitions. [2022-04-05 06:14:23,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-05 06:14:23,696 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 1.625) internal successors, (39), 21 states have internal predecessors, (39), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 39 [2022-04-05 06:14:23,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:14:23,697 INFO L225 Difference]: With dead ends: 137 [2022-04-05 06:14:23,697 INFO L226 Difference]: Without dead ends: 131 [2022-04-05 06:14:23,698 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 72 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=169, Invalid=1901, Unknown=0, NotChecked=0, Total=2070 [2022-04-05 06:14:23,698 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 87 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 937 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-05 06:14:23,699 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 128 Invalid, 970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 937 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-05 06:14:23,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-04-05 06:14:23,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 121. [2022-04-05 06:14:23,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 97 states have (on average 1.2371134020618557) internal successors, (120), 107 states have internal predecessors, (120), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2022-04-05 06:14:23,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 149 transitions. [2022-04-05 06:14:23,707 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 149 transitions. Word has length 39 [2022-04-05 06:14:23,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:14:23,707 INFO L478 AbstractCegarLoop]: Abstraction has 121 states and 149 transitions. [2022-04-05 06:14:23,707 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 1.625) internal successors, (39), 21 states have internal predecessors, (39), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:14:23,707 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 149 transitions. [2022-04-05 06:14:23,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-05 06:14:23,708 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:14:23,708 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:14:23,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-05 06:14:23,908 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:14:23,909 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:14:23,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:14:23,909 INFO L85 PathProgramCache]: Analyzing trace with hash 859850767, now seen corresponding path program 8 times [2022-04-05 06:14:23,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:14:23,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309179543] [2022-04-05 06:14:23,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:14:23,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:14:23,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:23,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:14:23,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:23,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:14:23,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:24,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-05 06:14:24,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:24,045 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:14:24,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:14:24,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309179543] [2022-04-05 06:14:24,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309179543] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:14:24,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404468893] [2022-04-05 06:14:24,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 06:14:24,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:14:24,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:14:24,060 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) [2022-04-05 06:14:24,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-05 06:14:24,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 06:14:24,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:14:24,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-05 06:14:24,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:14:24,242 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-05 06:14:24,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:14:24,449 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-05 06:14:24,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404468893] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:14:24,450 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:14:24,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 21 [2022-04-05 06:14:24,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078080728] [2022-04-05 06:14:24,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:14:24,450 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-05 06:14:24,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:14:24,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-05 06:14:24,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-04-05 06:14:24,451 INFO L87 Difference]: Start difference. First operand 121 states and 149 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:14:24,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:14:24,788 INFO L93 Difference]: Finished difference Result 132 states and 159 transitions. [2022-04-05 06:14:24,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-05 06:14:24,789 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2022-04-05 06:14:24,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:14:24,789 INFO L225 Difference]: With dead ends: 132 [2022-04-05 06:14:24,789 INFO L226 Difference]: Without dead ends: 120 [2022-04-05 06:14:24,790 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 71 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2022-04-05 06:14:24,790 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 86 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 06:14:24,791 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 101 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 06:14:24,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-04-05 06:14:24,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 118. [2022-04-05 06:14:24,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 94 states have (on average 1.2340425531914894) internal successors, (116), 104 states have internal predecessors, (116), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-04-05 06:14:24,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 142 transitions. [2022-04-05 06:14:24,798 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 142 transitions. Word has length 39 [2022-04-05 06:14:24,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:14:24,798 INFO L478 AbstractCegarLoop]: Abstraction has 118 states and 142 transitions. [2022-04-05 06:14:24,798 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:14:24,798 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 142 transitions. [2022-04-05 06:14:24,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-04-05 06:14:24,799 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:14:24,799 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:14:24,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-05 06:14:25,016 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,SelfDestructingSolverStorable17 [2022-04-05 06:14:25,016 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:14:25,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:14:25,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1060536243, now seen corresponding path program 9 times [2022-04-05 06:14:25,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:14:25,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259774290] [2022-04-05 06:14:25,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:14:25,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:14:25,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:25,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:14:25,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:25,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:14:25,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:25,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-05 06:14:25,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:25,136 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:14:25,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:14:25,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259774290] [2022-04-05 06:14:25,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259774290] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:14:25,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956807117] [2022-04-05 06:14:25,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 06:14:25,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:14:25,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:14:25,137 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) [2022-04-05 06:14:25,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-05 06:14:25,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-04-05 06:14:25,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:14:25,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-05 06:14:25,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:14:25,414 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:14:25,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:14:25,761 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:14:25,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956807117] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:14:25,762 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:14:25,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 25 [2022-04-05 06:14:25,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411016360] [2022-04-05 06:14:25,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:14:25,764 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-05 06:14:25,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:14:25,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-05 06:14:25,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2022-04-05 06:14:25,766 INFO L87 Difference]: Start difference. First operand 118 states and 142 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:14:26,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:14:26,265 INFO L93 Difference]: Finished difference Result 136 states and 165 transitions. [2022-04-05 06:14:26,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-05 06:14:26,266 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 40 [2022-04-05 06:14:26,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:14:26,267 INFO L225 Difference]: With dead ends: 136 [2022-04-05 06:14:26,267 INFO L226 Difference]: Without dead ends: 122 [2022-04-05 06:14:26,268 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=166, Invalid=1166, Unknown=0, NotChecked=0, Total=1332 [2022-04-05 06:14:26,268 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 152 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 06:14:26,268 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 101 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 06:14:26,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-04-05 06:14:26,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 113. [2022-04-05 06:14:26,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 89 states have (on average 1.247191011235955) internal successors, (111), 99 states have internal predecessors, (111), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (17), 8 states have call predecessors, (17), 8 states have call successors, (17) [2022-04-05 06:14:26,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 138 transitions. [2022-04-05 06:14:26,285 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 138 transitions. Word has length 40 [2022-04-05 06:14:26,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:14:26,285 INFO L478 AbstractCegarLoop]: Abstraction has 113 states and 138 transitions. [2022-04-05 06:14:26,286 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:14:26,286 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 138 transitions. [2022-04-05 06:14:26,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-04-05 06:14:26,286 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:14:26,286 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:14:26,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-05 06:14:26,491 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:14:26,491 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:14:26,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:14:26,492 INFO L85 PathProgramCache]: Analyzing trace with hash 683418749, now seen corresponding path program 10 times [2022-04-05 06:14:26,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:14:26,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735290136] [2022-04-05 06:14:26,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:14:26,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:14:26,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:26,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:14:26,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:26,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:14:26,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:26,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-05 06:14:26,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:26,644 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:14:26,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:14:26,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735290136] [2022-04-05 06:14:26,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735290136] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:14:26,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219876841] [2022-04-05 06:14:26,644 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 06:14:26,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:14:26,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:14:26,660 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) [2022-04-05 06:14:26,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-05 06:14:26,709 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 06:14:26,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:14:26,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-05 06:14:26,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:14:26,965 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:14:26,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:14:27,238 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:14:27,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219876841] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:14:27,238 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:14:27,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 25 [2022-04-05 06:14:27,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931014733] [2022-04-05 06:14:27,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:14:27,239 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-05 06:14:27,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:14:27,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-05 06:14:27,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2022-04-05 06:14:27,240 INFO L87 Difference]: Start difference. First operand 113 states and 138 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:14:27,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:14:27,837 INFO L93 Difference]: Finished difference Result 128 states and 153 transitions. [2022-04-05 06:14:27,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-05 06:14:27,838 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 40 [2022-04-05 06:14:27,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:14:27,839 INFO L225 Difference]: With dead ends: 128 [2022-04-05 06:14:27,839 INFO L226 Difference]: Without dead ends: 116 [2022-04-05 06:14:27,840 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=166, Invalid=1166, Unknown=0, NotChecked=0, Total=1332 [2022-04-05 06:14:27,840 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 145 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-05 06:14:27,840 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 133 Invalid, 956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 934 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-05 06:14:27,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-04-05 06:14:27,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 114. [2022-04-05 06:14:27,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 90 states have (on average 1.2444444444444445) internal successors, (112), 100 states have internal predecessors, (112), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2022-04-05 06:14:27,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 137 transitions. [2022-04-05 06:14:27,851 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 137 transitions. Word has length 40 [2022-04-05 06:14:27,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:14:27,851 INFO L478 AbstractCegarLoop]: Abstraction has 114 states and 137 transitions. [2022-04-05 06:14:27,852 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:14:27,852 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 137 transitions. [2022-04-05 06:14:27,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-04-05 06:14:27,852 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:14:27,852 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:14:27,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-05 06:14:28,059 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:14:28,060 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:14:28,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:14:28,060 INFO L85 PathProgramCache]: Analyzing trace with hash 2011491521, now seen corresponding path program 11 times [2022-04-05 06:14:28,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:14:28,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450030429] [2022-04-05 06:14:28,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:14:28,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:14:28,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:28,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:14:28,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:28,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:14:28,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:28,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-05 06:14:28,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:28,142 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-05 06:14:28,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:14:28,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450030429] [2022-04-05 06:14:28,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450030429] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:14:28,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495713568] [2022-04-05 06:14:28,143 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 06:14:28,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:14:28,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:14:28,144 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) [2022-04-05 06:14:28,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-05 06:14:28,187 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 06:14:28,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:14:28,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-05 06:14:28,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:14:28,252 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-05 06:14:28,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:14:28,317 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-05 06:14:28,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495713568] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:14:28,317 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:14:28,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 10 [2022-04-05 06:14:28,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126533002] [2022-04-05 06:14:28,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:14:28,318 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-05 06:14:28,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:14:28,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-05 06:14:28,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-04-05 06:14:28,318 INFO L87 Difference]: Start difference. First operand 114 states and 137 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:14:28,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:14:28,442 INFO L93 Difference]: Finished difference Result 170 states and 199 transitions. [2022-04-05 06:14:28,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-05 06:14:28,443 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2022-04-05 06:14:28,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:14:28,443 INFO L225 Difference]: With dead ends: 170 [2022-04-05 06:14:28,443 INFO L226 Difference]: Without dead ends: 105 [2022-04-05 06:14:28,444 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2022-04-05 06:14:28,444 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 53 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 06:14:28,444 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 53 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 06:14:28,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-04-05 06:14:28,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 97. [2022-04-05 06:14:28,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 79 states have (on average 1.2278481012658229) internal successors, (97), 85 states have internal predecessors, (97), 8 states have call successors, (8), 5 states have call predecessors, (8), 9 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-04-05 06:14:28,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 114 transitions. [2022-04-05 06:14:28,452 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 114 transitions. Word has length 40 [2022-04-05 06:14:28,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:14:28,452 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 114 transitions. [2022-04-05 06:14:28,452 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:14:28,452 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 114 transitions. [2022-04-05 06:14:28,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-04-05 06:14:28,453 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:14:28,453 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:14:28,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-05 06:14:28,653 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,SelfDestructingSolverStorable20 [2022-04-05 06:14:28,654 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:14:28,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:14:28,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1799645194, now seen corresponding path program 12 times [2022-04-05 06:14:28,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:14:28,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291347174] [2022-04-05 06:14:28,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:14:28,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:14:28,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:28,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:14:28,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:28,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:14:28,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:28,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-05 06:14:28,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:28,723 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-05 06:14:28,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:14:28,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291347174] [2022-04-05 06:14:28,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291347174] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:14:28,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660029339] [2022-04-05 06:14:28,723 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-05 06:14:28,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:14:28,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:14:28,740 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) [2022-04-05 06:14:28,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-05 06:14:28,788 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-04-05 06:14:28,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:14:28,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-05 06:14:28,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:14:28,879 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-05 06:14:28,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:14:28,945 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-05 06:14:28,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660029339] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:14:28,945 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:14:28,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 10 [2022-04-05 06:14:28,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631644905] [2022-04-05 06:14:28,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:14:28,945 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-05 06:14:28,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:14:28,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-05 06:14:28,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-04-05 06:14:28,946 INFO L87 Difference]: Start difference. First operand 97 states and 114 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-05 06:14:29,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:14:29,059 INFO L93 Difference]: Finished difference Result 115 states and 134 transitions. [2022-04-05 06:14:29,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-05 06:14:29,061 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2022-04-05 06:14:29,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:14:29,062 INFO L225 Difference]: With dead ends: 115 [2022-04-05 06:14:29,062 INFO L226 Difference]: Without dead ends: 100 [2022-04-05 06:14:29,063 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2022-04-05 06:14:29,063 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 50 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 06:14:29,063 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 48 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 06:14:29,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-04-05 06:14:29,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2022-04-05 06:14:29,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 82 states have (on average 1.2195121951219512) internal successors, (100), 88 states have internal predecessors, (100), 8 states have call successors, (8), 5 states have call predecessors, (8), 9 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-04-05 06:14:29,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 117 transitions. [2022-04-05 06:14:29,073 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 117 transitions. Word has length 40 [2022-04-05 06:14:29,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:14:29,073 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 117 transitions. [2022-04-05 06:14:29,074 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-05 06:14:29,074 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 117 transitions. [2022-04-05 06:14:29,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-05 06:14:29,074 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:14:29,074 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:14:29,096 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-04-05 06:14:29,283 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-04-05 06:14:29,284 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:14:29,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:14:29,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1580519202, now seen corresponding path program 13 times [2022-04-05 06:14:29,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:14:29,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398266770] [2022-04-05 06:14:29,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:14:29,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:14:29,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:29,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:14:29,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:29,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:14:29,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:29,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-05 06:14:29,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:29,587 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 06:14:29,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:14:29,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398266770] [2022-04-05 06:14:29,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398266770] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:14:29,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145793972] [2022-04-05 06:14:29,588 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-05 06:14:29,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:14:29,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:14:29,589 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:14:29,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-05 06:14:29,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:29,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-05 06:14:29,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:14:29,902 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 06:14:29,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:14:30,100 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 06:14:30,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145793972] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:14:30,100 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:14:30,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 29 [2022-04-05 06:14:30,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257855698] [2022-04-05 06:14:30,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:14:30,101 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-05 06:14:30,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:14:30,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-05 06:14:30,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=747, Unknown=0, NotChecked=0, Total=812 [2022-04-05 06:14:30,102 INFO L87 Difference]: Start difference. First operand 100 states and 117 transitions. Second operand has 29 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 23 states have internal predecessors, (41), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:14:30,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:14:30,961 INFO L93 Difference]: Finished difference Result 140 states and 164 transitions. [2022-04-05 06:14:30,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-05 06:14:30,962 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 23 states have internal predecessors, (41), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 41 [2022-04-05 06:14:30,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:14:30,963 INFO L225 Difference]: With dead ends: 140 [2022-04-05 06:14:30,963 INFO L226 Difference]: Without dead ends: 134 [2022-04-05 06:14:30,964 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 76 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=181, Invalid=2269, Unknown=0, NotChecked=0, Total=2450 [2022-04-05 06:14:30,965 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 103 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 1560 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 1594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-05 06:14:30,965 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 163 Invalid, 1594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1560 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-05 06:14:30,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-04-05 06:14:30,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 116. [2022-04-05 06:14:30,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 95 states have (on average 1.2105263157894737) internal successors, (115), 103 states have internal predecessors, (115), 9 states have call successors, (9), 5 states have call predecessors, (9), 11 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2022-04-05 06:14:30,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 136 transitions. [2022-04-05 06:14:30,981 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 136 transitions. Word has length 41 [2022-04-05 06:14:30,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:14:30,983 INFO L478 AbstractCegarLoop]: Abstraction has 116 states and 136 transitions. [2022-04-05 06:14:30,983 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 23 states have internal predecessors, (41), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:14:30,983 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 136 transitions. [2022-04-05 06:14:30,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-05 06:14:30,984 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:14:30,984 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:14:31,019 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-04-05 06:14:31,220 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-04-05 06:14:31,220 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:14:31,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:14:31,221 INFO L85 PathProgramCache]: Analyzing trace with hash -39073241, now seen corresponding path program 14 times [2022-04-05 06:14:31,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:14:31,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656625563] [2022-04-05 06:14:31,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:14:31,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:14:31,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:31,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:14:31,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:31,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:14:31,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:31,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-05 06:14:31,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:31,498 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-05 06:14:31,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:14:31,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656625563] [2022-04-05 06:14:31,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656625563] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:14:31,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067372605] [2022-04-05 06:14:31,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 06:14:31,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:14:31,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:14:31,510 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:14:31,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-05 06:14:31,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 06:14:31,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:14:31,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-05 06:14:31,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:14:31,868 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-05 06:14:31,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:14:32,054 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-05 06:14:32,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067372605] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:14:32,054 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:14:32,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 29 [2022-04-05 06:14:32,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679267779] [2022-04-05 06:14:32,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:14:32,055 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-05 06:14:32,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:14:32,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-05 06:14:32,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=743, Unknown=0, NotChecked=0, Total=812 [2022-04-05 06:14:32,055 INFO L87 Difference]: Start difference. First operand 116 states and 136 transitions. Second operand has 29 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 23 states have internal predecessors, (41), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:14:32,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:14:32,663 INFO L93 Difference]: Finished difference Result 134 states and 157 transitions. [2022-04-05 06:14:32,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-05 06:14:32,663 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 23 states have internal predecessors, (41), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 41 [2022-04-05 06:14:32,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:14:32,664 INFO L225 Difference]: With dead ends: 134 [2022-04-05 06:14:32,664 INFO L226 Difference]: Without dead ends: 128 [2022-04-05 06:14:32,665 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 70 SyntacticMatches, 9 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=183, Invalid=2073, Unknown=0, NotChecked=0, Total=2256 [2022-04-05 06:14:32,666 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 56 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1035 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 1061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-05 06:14:32,666 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 141 Invalid, 1061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1035 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-05 06:14:32,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-04-05 06:14:32,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2022-04-05 06:14:32,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 102 states have (on average 1.2156862745098038) internal successors, (124), 112 states have internal predecessors, (124), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2022-04-05 06:14:32,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 149 transitions. [2022-04-05 06:14:32,699 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 149 transitions. Word has length 41 [2022-04-05 06:14:32,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:14:32,699 INFO L478 AbstractCegarLoop]: Abstraction has 126 states and 149 transitions. [2022-04-05 06:14:32,699 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 23 states have internal predecessors, (41), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:14:32,700 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 149 transitions. [2022-04-05 06:14:32,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-05 06:14:32,700 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:14:32,700 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:14:32,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-04-05 06:14:32,915 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:14:32,915 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:14:32,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:14:32,916 INFO L85 PathProgramCache]: Analyzing trace with hash -674137827, now seen corresponding path program 15 times [2022-04-05 06:14:32,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:14:32,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967242782] [2022-04-05 06:14:32,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:14:32,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:14:32,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:32,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:14:32,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:32,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:14:32,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:32,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-05 06:14:32,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:33,081 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:14:33,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:14:33,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967242782] [2022-04-05 06:14:33,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967242782] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:14:33,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107820329] [2022-04-05 06:14:33,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 06:14:33,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:14:33,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:14:33,096 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:14:33,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-05 06:14:33,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-04-05 06:14:33,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:14:33,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-05 06:14:33,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:14:33,398 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:14:33,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:14:33,759 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:14:33,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107820329] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:14:33,760 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:14:33,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 31 [2022-04-05 06:14:33,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281328561] [2022-04-05 06:14:33,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:14:33,760 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-05 06:14:33,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:14:33,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-05 06:14:33,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2022-04-05 06:14:33,761 INFO L87 Difference]: Start difference. First operand 126 states and 149 transitions. Second operand has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:14:34,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:14:34,530 INFO L93 Difference]: Finished difference Result 152 states and 180 transitions. [2022-04-05 06:14:34,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-05 06:14:34,530 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2022-04-05 06:14:34,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:14:34,531 INFO L225 Difference]: With dead ends: 152 [2022-04-05 06:14:34,531 INFO L226 Difference]: Without dead ends: 138 [2022-04-05 06:14:34,533 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=230, Invalid=1932, Unknown=0, NotChecked=0, Total=2162 [2022-04-05 06:14:34,533 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 264 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 927 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-05 06:14:34,533 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 121 Invalid, 963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 927 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-05 06:14:34,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-04-05 06:14:34,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 129. [2022-04-05 06:14:34,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 105 states have (on average 1.2285714285714286) internal successors, (129), 115 states have internal predecessors, (129), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2022-04-05 06:14:34,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 154 transitions. [2022-04-05 06:14:34,560 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 154 transitions. Word has length 42 [2022-04-05 06:14:34,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:14:34,560 INFO L478 AbstractCegarLoop]: Abstraction has 129 states and 154 transitions. [2022-04-05 06:14:34,560 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:14:34,560 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 154 transitions. [2022-04-05 06:14:34,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-05 06:14:34,561 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:14:34,561 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:14:34,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-04-05 06:14:34,775 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:14:34,775 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:14:34,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:14:34,776 INFO L85 PathProgramCache]: Analyzing trace with hash 520121747, now seen corresponding path program 16 times [2022-04-05 06:14:34,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:14:34,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463539593] [2022-04-05 06:14:34,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:14:34,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:14:34,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:34,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:14:34,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:34,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:14:34,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:34,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-05 06:14:34,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:34,969 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:14:34,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:14:34,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463539593] [2022-04-05 06:14:34,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463539593] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:14:34,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15034334] [2022-04-05 06:14:34,970 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 06:14:34,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:14:34,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:14:34,984 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:14:35,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-05 06:14:35,105 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 06:14:35,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:14:35,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-05 06:14:35,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:14:35,414 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:14:35,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:14:35,785 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:14:35,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15034334] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:14:35,785 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:14:35,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 31 [2022-04-05 06:14:35,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090996424] [2022-04-05 06:14:35,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:14:35,786 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-05 06:14:35,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:14:35,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-05 06:14:35,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2022-04-05 06:14:35,787 INFO L87 Difference]: Start difference. First operand 129 states and 154 transitions. Second operand has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:14:36,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:14:36,573 INFO L93 Difference]: Finished difference Result 144 states and 169 transitions. [2022-04-05 06:14:36,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-05 06:14:36,574 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2022-04-05 06:14:36,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:14:36,574 INFO L225 Difference]: With dead ends: 144 [2022-04-05 06:14:36,575 INFO L226 Difference]: Without dead ends: 132 [2022-04-05 06:14:36,575 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=230, Invalid=1932, Unknown=0, NotChecked=0, Total=2162 [2022-04-05 06:14:36,576 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 270 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1021 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 1052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-05 06:14:36,576 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 128 Invalid, 1052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1021 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-05 06:14:36,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-04-05 06:14:36,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2022-04-05 06:14:36,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 106 states have (on average 1.2264150943396226) internal successors, (130), 116 states have internal predecessors, (130), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2022-04-05 06:14:36,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 154 transitions. [2022-04-05 06:14:36,587 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 154 transitions. Word has length 42 [2022-04-05 06:14:36,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:14:36,587 INFO L478 AbstractCegarLoop]: Abstraction has 130 states and 154 transitions. [2022-04-05 06:14:36,587 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:14:36,587 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 154 transitions. [2022-04-05 06:14:36,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-05 06:14:36,588 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:14:36,588 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:14:36,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-04-05 06:14:36,803 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-04-05 06:14:36,804 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:14:36,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:14:36,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1295917546, now seen corresponding path program 17 times [2022-04-05 06:14:36,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:14:36,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851176478] [2022-04-05 06:14:36,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:14:36,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:14:36,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:36,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:14:36,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:36,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:14:36,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:36,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-05 06:14:36,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:36,854 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-05 06:14:36,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:14:36,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851176478] [2022-04-05 06:14:36,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851176478] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:14:36,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307148224] [2022-04-05 06:14:36,854 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 06:14:36,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:14:36,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:14:36,855 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:14:36,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-05 06:14:36,900 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-04-05 06:14:36,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:14:36,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 06:14:36,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:14:36,969 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-05 06:14:36,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:14:37,025 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-05 06:14:37,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307148224] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:14:37,026 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:14:37,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 12 [2022-04-05 06:14:37,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569996126] [2022-04-05 06:14:37,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:14:37,026 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-05 06:14:37,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:14:37,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-05 06:14:37,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-04-05 06:14:37,027 INFO L87 Difference]: Start difference. First operand 130 states and 154 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-05 06:14:37,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:14:37,206 INFO L93 Difference]: Finished difference Result 186 states and 223 transitions. [2022-04-05 06:14:37,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-05 06:14:37,207 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 42 [2022-04-05 06:14:37,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:14:37,207 INFO L225 Difference]: With dead ends: 186 [2022-04-05 06:14:37,207 INFO L226 Difference]: Without dead ends: 164 [2022-04-05 06:14:37,208 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2022-04-05 06:14:37,208 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 65 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 06:14:37,209 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 53 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 06:14:37,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-04-05 06:14:37,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 152. [2022-04-05 06:14:37,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 128 states have (on average 1.2265625) internal successors, (157), 138 states have internal predecessors, (157), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2022-04-05 06:14:37,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 181 transitions. [2022-04-05 06:14:37,223 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 181 transitions. Word has length 42 [2022-04-05 06:14:37,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:14:37,224 INFO L478 AbstractCegarLoop]: Abstraction has 152 states and 181 transitions. [2022-04-05 06:14:37,224 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-05 06:14:37,224 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 181 transitions. [2022-04-05 06:14:37,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-05 06:14:37,224 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:14:37,225 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:14:37,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-04-05 06:14:37,435 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-04-05 06:14:37,436 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:14:37,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:14:37,436 INFO L85 PathProgramCache]: Analyzing trace with hash 817928577, now seen corresponding path program 18 times [2022-04-05 06:14:37,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:14:37,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276375057] [2022-04-05 06:14:37,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:14:37,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:14:37,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:37,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:14:37,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:37,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:14:37,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:37,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-05 06:14:37,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:37,494 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-05 06:14:37,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:14:37,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276375057] [2022-04-05 06:14:37,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276375057] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:14:37,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377891766] [2022-04-05 06:14:37,495 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-05 06:14:37,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:14:37,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:14:37,512 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:14:37,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-04-05 06:14:37,576 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-05 06:14:37,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:14:37,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 06:14:37,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:14:37,653 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-05 06:14:37,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:14:37,711 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-05 06:14:37,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377891766] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:14:37,711 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:14:37,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 12 [2022-04-05 06:14:37,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421685933] [2022-04-05 06:14:37,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:14:37,712 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-05 06:14:37,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:14:37,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-05 06:14:37,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-04-05 06:14:37,713 INFO L87 Difference]: Start difference. First operand 152 states and 181 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:14:37,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:14:37,858 INFO L93 Difference]: Finished difference Result 290 states and 347 transitions. [2022-04-05 06:14:37,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-05 06:14:37,859 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 42 [2022-04-05 06:14:37,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:14:37,860 INFO L225 Difference]: With dead ends: 290 [2022-04-05 06:14:37,861 INFO L226 Difference]: Without dead ends: 186 [2022-04-05 06:14:37,862 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2022-04-05 06:14:37,862 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 78 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 06:14:37,862 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 53 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 06:14:37,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-04-05 06:14:37,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 174. [2022-04-05 06:14:37,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 150 states have (on average 1.2266666666666666) internal successors, (184), 160 states have internal predecessors, (184), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2022-04-05 06:14:37,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 208 transitions. [2022-04-05 06:14:37,885 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 208 transitions. Word has length 42 [2022-04-05 06:14:37,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:14:37,885 INFO L478 AbstractCegarLoop]: Abstraction has 174 states and 208 transitions. [2022-04-05 06:14:37,885 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:14:37,885 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 208 transitions. [2022-04-05 06:14:37,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-05 06:14:37,886 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:14:37,886 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:14:37,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-04-05 06:14:38,087 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-04-05 06:14:38,087 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:14:38,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:14:38,088 INFO L85 PathProgramCache]: Analyzing trace with hash 813279436, now seen corresponding path program 19 times [2022-04-05 06:14:38,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:14:38,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722481776] [2022-04-05 06:14:38,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:14:38,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:14:38,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:38,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:14:38,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:38,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:14:38,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:38,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-05 06:14:38,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:38,423 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 06:14:38,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:14:38,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722481776] [2022-04-05 06:14:38,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722481776] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:14:38,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912658600] [2022-04-05 06:14:38,423 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-05 06:14:38,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:14:38,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:14:38,424 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:14:38,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-04-05 06:14:38,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:38,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 43 conjunts are in the unsatisfiable core [2022-04-05 06:14:38,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:14:38,752 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 06:14:38,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:14:38,939 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 06:14:38,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912658600] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:14:38,940 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:14:38,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 31 [2022-04-05 06:14:38,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142625080] [2022-04-05 06:14:38,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:14:38,940 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-05 06:14:38,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:14:38,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-05 06:14:38,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=861, Unknown=0, NotChecked=0, Total=930 [2022-04-05 06:14:38,941 INFO L87 Difference]: Start difference. First operand 174 states and 208 transitions. Second operand has 31 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 25 states have internal predecessors, (43), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:14:39,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:14:39,946 INFO L93 Difference]: Finished difference Result 224 states and 267 transitions. [2022-04-05 06:14:39,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-05 06:14:39,946 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 25 states have internal predecessors, (43), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 43 [2022-04-05 06:14:39,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:14:39,947 INFO L225 Difference]: With dead ends: 224 [2022-04-05 06:14:39,947 INFO L226 Difference]: Without dead ends: 218 [2022-04-05 06:14:39,948 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 80 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=193, Invalid=2669, Unknown=0, NotChecked=0, Total=2862 [2022-04-05 06:14:39,949 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 128 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 2057 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 2094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 2057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-05 06:14:39,949 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 180 Invalid, 2094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 2057 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-05 06:14:39,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-04-05 06:14:39,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 190. [2022-04-05 06:14:39,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 163 states have (on average 1.2208588957055215) internal successors, (199), 175 states have internal predecessors, (199), 11 states have call successors, (11), 5 states have call predecessors, (11), 15 states have return successors, (17), 9 states have call predecessors, (17), 9 states have call successors, (17) [2022-04-05 06:14:39,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 227 transitions. [2022-04-05 06:14:39,968 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 227 transitions. Word has length 43 [2022-04-05 06:14:39,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:14:39,968 INFO L478 AbstractCegarLoop]: Abstraction has 190 states and 227 transitions. [2022-04-05 06:14:39,968 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 25 states have internal predecessors, (43), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:14:39,968 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 227 transitions. [2022-04-05 06:14:39,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-05 06:14:39,969 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:14:39,969 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:14:39,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-04-05 06:14:40,186 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-04-05 06:14:40,186 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:14:40,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:14:40,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1078382385, now seen corresponding path program 20 times [2022-04-05 06:14:40,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:14:40,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138549989] [2022-04-05 06:14:40,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:14:40,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:14:40,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:40,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:14:40,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:40,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:14:40,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:40,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-05 06:14:40,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:40,342 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-05 06:14:40,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:14:40,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138549989] [2022-04-05 06:14:40,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138549989] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:14:40,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515707825] [2022-04-05 06:14:40,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 06:14:40,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:14:40,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:14:40,344 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:14:40,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-04-05 06:14:40,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 06:14:40,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:14:40,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-05 06:14:40,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:14:40,604 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-04-05 06:14:40,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:14:40,918 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-04-05 06:14:40,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515707825] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:14:40,918 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:14:40,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 27 [2022-04-05 06:14:40,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061544601] [2022-04-05 06:14:40,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:14:40,919 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-05 06:14:40,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:14:40,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-05 06:14:40,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2022-04-05 06:14:40,919 INFO L87 Difference]: Start difference. First operand 190 states and 227 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:14:41,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:14:41,507 INFO L93 Difference]: Finished difference Result 230 states and 273 transitions. [2022-04-05 06:14:41,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-05 06:14:41,508 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2022-04-05 06:14:41,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:14:41,509 INFO L225 Difference]: With dead ends: 230 [2022-04-05 06:14:41,509 INFO L226 Difference]: Without dead ends: 215 [2022-04-05 06:14:41,510 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 72 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2022-04-05 06:14:41,510 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 176 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 818 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-05 06:14:41,510 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 114 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 818 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-05 06:14:41,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-04-05 06:14:41,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 210. [2022-04-05 06:14:41,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 174 states have (on average 1.2011494252873562) internal successors, (209), 192 states have internal predecessors, (209), 14 states have call successors, (14), 5 states have call predecessors, (14), 21 states have return successors, (26), 12 states have call predecessors, (26), 12 states have call successors, (26) [2022-04-05 06:14:41,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 249 transitions. [2022-04-05 06:14:41,531 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 249 transitions. Word has length 43 [2022-04-05 06:14:41,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:14:41,531 INFO L478 AbstractCegarLoop]: Abstraction has 210 states and 249 transitions. [2022-04-05 06:14:41,531 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:14:41,531 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 249 transitions. [2022-04-05 06:14:41,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-05 06:14:41,532 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:14:41,532 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:14:41,549 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-04-05 06:14:41,749 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:14:41,749 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:14:41,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:14:41,750 INFO L85 PathProgramCache]: Analyzing trace with hash 236349687, now seen corresponding path program 21 times [2022-04-05 06:14:41,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:14:41,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975711672] [2022-04-05 06:14:41,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:14:41,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:14:41,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:41,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:14:41,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:41,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:14:41,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:41,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-05 06:14:41,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:42,069 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-05 06:14:42,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:14:42,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975711672] [2022-04-05 06:14:42,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975711672] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:14:42,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449149192] [2022-04-05 06:14:42,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 06:14:42,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:14:42,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:14:42,084 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:14:42,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-04-05 06:14:42,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-04-05 06:14:42,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:14:42,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-05 06:14:42,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:14:42,559 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-05 06:14:42,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:14:42,765 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-05 06:14:42,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449149192] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:14:42,765 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:14:42,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 31 [2022-04-05 06:14:42,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709531711] [2022-04-05 06:14:42,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:14:42,766 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-05 06:14:42,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:14:42,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-05 06:14:42,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=857, Unknown=0, NotChecked=0, Total=930 [2022-04-05 06:14:42,766 INFO L87 Difference]: Start difference. First operand 210 states and 249 transitions. Second operand has 31 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 25 states have internal predecessors, (43), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:14:43,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:14:43,569 INFO L93 Difference]: Finished difference Result 228 states and 271 transitions. [2022-04-05 06:14:43,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-05 06:14:43,569 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 25 states have internal predecessors, (43), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 43 [2022-04-05 06:14:43,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:14:43,570 INFO L225 Difference]: With dead ends: 228 [2022-04-05 06:14:43,571 INFO L226 Difference]: Without dead ends: 213 [2022-04-05 06:14:43,572 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 74 SyntacticMatches, 9 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=195, Invalid=2457, Unknown=0, NotChecked=0, Total=2652 [2022-04-05 06:14:43,573 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 76 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1374 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 1402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-05 06:14:43,573 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 153 Invalid, 1402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1374 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-05 06:14:43,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-04-05 06:14:43,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 208. [2022-04-05 06:14:43,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 172 states have (on average 1.2093023255813953) internal successors, (208), 190 states have internal predecessors, (208), 14 states have call successors, (14), 5 states have call predecessors, (14), 21 states have return successors, (26), 12 states have call predecessors, (26), 12 states have call successors, (26) [2022-04-05 06:14:43,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 248 transitions. [2022-04-05 06:14:43,602 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 248 transitions. Word has length 43 [2022-04-05 06:14:43,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:14:43,602 INFO L478 AbstractCegarLoop]: Abstraction has 208 states and 248 transitions. [2022-04-05 06:14:43,602 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 25 states have internal predecessors, (43), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:14:43,602 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 248 transitions. [2022-04-05 06:14:43,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-05 06:14:43,604 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:14:43,604 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:14:43,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-04-05 06:14:43,807 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:14:43,808 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:14:43,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:14:43,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1032734298, now seen corresponding path program 22 times [2022-04-05 06:14:43,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:14:43,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572566337] [2022-04-05 06:14:43,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:14:43,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:14:43,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:43,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:14:43,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:43,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:14:43,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:43,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-05 06:14:43,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:43,969 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-05 06:14:43,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:14:43,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572566337] [2022-04-05 06:14:43,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572566337] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:14:43,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848777331] [2022-04-05 06:14:43,970 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 06:14:43,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:14:43,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:14:43,988 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:14:44,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-04-05 06:14:44,041 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 06:14:44,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:14:44,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-05 06:14:44,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:14:44,233 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-04-05 06:14:44,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:14:44,509 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-04-05 06:14:44,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848777331] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:14:44,509 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:14:44,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 27 [2022-04-05 06:14:44,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447490132] [2022-04-05 06:14:44,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:14:44,510 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-05 06:14:44,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:14:44,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-05 06:14:44,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2022-04-05 06:14:44,511 INFO L87 Difference]: Start difference. First operand 208 states and 248 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:14:45,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:14:45,060 INFO L93 Difference]: Finished difference Result 222 states and 261 transitions. [2022-04-05 06:14:45,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-05 06:14:45,060 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2022-04-05 06:14:45,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:14:45,062 INFO L225 Difference]: With dead ends: 222 [2022-04-05 06:14:45,062 INFO L226 Difference]: Without dead ends: 202 [2022-04-05 06:14:45,063 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 72 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2022-04-05 06:14:45,063 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 223 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-05 06:14:45,064 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 102 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 709 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-05 06:14:45,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-04-05 06:14:45,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 200. [2022-04-05 06:14:45,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 164 states have (on average 1.2073170731707317) internal successors, (198), 182 states have internal predecessors, (198), 14 states have call successors, (14), 5 states have call predecessors, (14), 21 states have return successors, (24), 12 states have call predecessors, (24), 12 states have call successors, (24) [2022-04-05 06:14:45,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 236 transitions. [2022-04-05 06:14:45,104 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 236 transitions. Word has length 43 [2022-04-05 06:14:45,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:14:45,104 INFO L478 AbstractCegarLoop]: Abstraction has 200 states and 236 transitions. [2022-04-05 06:14:45,105 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:14:45,105 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 236 transitions. [2022-04-05 06:14:45,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-05 06:14:45,106 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:14:45,106 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:14:45,127 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-04-05 06:14:45,323 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:14:45,323 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:14:45,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:14:45,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1311233203, now seen corresponding path program 23 times [2022-04-05 06:14:45,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:14:45,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458964920] [2022-04-05 06:14:45,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:14:45,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:14:45,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:45,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:14:45,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:45,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:14:45,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:45,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-05 06:14:45,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:45,531 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:14:45,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:14:45,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458964920] [2022-04-05 06:14:45,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458964920] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:14:45,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022309488] [2022-04-05 06:14:45,532 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 06:14:45,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:14:45,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:14:45,548 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:14:45,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-04-05 06:14:45,610 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-04-05 06:14:45,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:14:45,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-05 06:14:45,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:14:45,928 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:14:45,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:14:46,370 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:14:46,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022309488] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:14:46,371 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:14:46,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 37 [2022-04-05 06:14:46,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058707770] [2022-04-05 06:14:46,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:14:46,371 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-04-05 06:14:46,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:14:46,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-04-05 06:14:46,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1215, Unknown=0, NotChecked=0, Total=1332 [2022-04-05 06:14:46,372 INFO L87 Difference]: Start difference. First operand 200 states and 236 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:14:47,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:14:47,682 INFO L93 Difference]: Finished difference Result 244 states and 289 transitions. [2022-04-05 06:14:47,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-05 06:14:47,682 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 44 [2022-04-05 06:14:47,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:14:47,683 INFO L225 Difference]: With dead ends: 244 [2022-04-05 06:14:47,683 INFO L226 Difference]: Without dead ends: 230 [2022-04-05 06:14:47,685 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=300, Invalid=2892, Unknown=0, NotChecked=0, Total=3192 [2022-04-05 06:14:47,685 INFO L913 BasicCegarLoop]: 64 mSDtfsCounter, 338 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1760 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 1809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-05 06:14:47,685 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 176 Invalid, 1809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1760 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-05 06:14:47,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-04-05 06:14:47,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 221. [2022-04-05 06:14:47,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 182 states have (on average 1.2087912087912087) internal successors, (220), 202 states have internal predecessors, (220), 15 states have call successors, (15), 5 states have call predecessors, (15), 23 states have return successors, (27), 13 states have call predecessors, (27), 13 states have call successors, (27) [2022-04-05 06:14:47,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 262 transitions. [2022-04-05 06:14:47,708 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 262 transitions. Word has length 44 [2022-04-05 06:14:47,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:14:47,708 INFO L478 AbstractCegarLoop]: Abstraction has 221 states and 262 transitions. [2022-04-05 06:14:47,708 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:14:47,708 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 262 transitions. [2022-04-05 06:14:47,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-05 06:14:47,709 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:14:47,710 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:14:47,726 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-04-05 06:14:47,926 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:14:47,926 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:14:47,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:14:47,926 INFO L85 PathProgramCache]: Analyzing trace with hash -321425667, now seen corresponding path program 24 times [2022-04-05 06:14:47,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:14:47,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712819291] [2022-04-05 06:14:47,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:14:47,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:14:47,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:47,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:14:47,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:47,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:14:47,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:48,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-05 06:14:48,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:48,128 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:14:48,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:14:48,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712819291] [2022-04-05 06:14:48,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712819291] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:14:48,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743706406] [2022-04-05 06:14:48,129 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-05 06:14:48,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:14:48,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:14:48,130 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:14:48,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-04-05 06:14:48,180 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-05 06:14:48,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:14:48,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-05 06:14:48,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:14:48,484 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:14:48,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:14:48,922 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:14:48,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743706406] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:14:48,923 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:14:48,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 37 [2022-04-05 06:14:48,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653296751] [2022-04-05 06:14:48,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:14:48,923 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-04-05 06:14:48,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:14:48,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-04-05 06:14:48,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1215, Unknown=0, NotChecked=0, Total=1332 [2022-04-05 06:14:48,924 INFO L87 Difference]: Start difference. First operand 221 states and 262 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:14:50,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:14:50,097 INFO L93 Difference]: Finished difference Result 236 states and 277 transitions. [2022-04-05 06:14:50,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-05 06:14:50,098 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 44 [2022-04-05 06:14:50,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:14:50,099 INFO L225 Difference]: With dead ends: 236 [2022-04-05 06:14:50,099 INFO L226 Difference]: Without dead ends: 224 [2022-04-05 06:14:50,101 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=300, Invalid=2892, Unknown=0, NotChecked=0, Total=3192 [2022-04-05 06:14:50,101 INFO L913 BasicCegarLoop]: 66 mSDtfsCounter, 392 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1506 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 1548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-05 06:14:50,101 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [401 Valid, 153 Invalid, 1548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1506 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-05 06:14:50,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-04-05 06:14:50,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 222. [2022-04-05 06:14:50,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 183 states have (on average 1.2076502732240437) internal successors, (221), 203 states have internal predecessors, (221), 15 states have call successors, (15), 5 states have call predecessors, (15), 23 states have return successors, (25), 13 states have call predecessors, (25), 13 states have call successors, (25) [2022-04-05 06:14:50,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 261 transitions. [2022-04-05 06:14:50,133 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 261 transitions. Word has length 44 [2022-04-05 06:14:50,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:14:50,133 INFO L478 AbstractCegarLoop]: Abstraction has 222 states and 261 transitions. [2022-04-05 06:14:50,133 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:14:50,133 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 261 transitions. [2022-04-05 06:14:50,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-05 06:14:50,135 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:14:50,135 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:14:50,159 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-04-05 06:14:50,345 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:14:50,346 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:14:50,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:14:50,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1285627670, now seen corresponding path program 25 times [2022-04-05 06:14:50,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:14:50,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188621540] [2022-04-05 06:14:50,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:14:50,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:14:50,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:50,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:14:50,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:50,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:14:50,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:50,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-05 06:14:50,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:50,403 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-04-05 06:14:50,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:14:50,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188621540] [2022-04-05 06:14:50,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188621540] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:14:50,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098933190] [2022-04-05 06:14:50,403 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-05 06:14:50,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:14:50,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:14:50,404 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:14:50,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-04-05 06:14:50,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:50,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-05 06:14:50,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:14:50,541 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-04-05 06:14:50,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:14:50,612 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-04-05 06:14:50,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098933190] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:14:50,613 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:14:50,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 13 [2022-04-05 06:14:50,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585276990] [2022-04-05 06:14:50,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:14:50,613 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-05 06:14:50,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:14:50,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-05 06:14:50,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-04-05 06:14:50,614 INFO L87 Difference]: Start difference. First operand 222 states and 261 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:14:50,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:14:50,799 INFO L93 Difference]: Finished difference Result 339 states and 391 transitions. [2022-04-05 06:14:50,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-05 06:14:50,799 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 44 [2022-04-05 06:14:50,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:14:50,800 INFO L225 Difference]: With dead ends: 339 [2022-04-05 06:14:50,801 INFO L226 Difference]: Without dead ends: 215 [2022-04-05 06:14:50,801 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2022-04-05 06:14:50,802 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 55 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 06:14:50,803 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 62 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 06:14:50,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-04-05 06:14:50,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 207. [2022-04-05 06:14:50,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 174 states have (on average 1.1954022988505748) internal successors, (208), 190 states have internal predecessors, (208), 13 states have call successors, (13), 5 states have call predecessors, (13), 19 states have return successors, (19), 11 states have call predecessors, (19), 11 states have call successors, (19) [2022-04-05 06:14:50,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 240 transitions. [2022-04-05 06:14:50,834 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 240 transitions. Word has length 44 [2022-04-05 06:14:50,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:14:50,834 INFO L478 AbstractCegarLoop]: Abstraction has 207 states and 240 transitions. [2022-04-05 06:14:50,834 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:14:50,834 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 240 transitions. [2022-04-05 06:14:50,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-05 06:14:50,835 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:14:50,835 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:14:50,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-04-05 06:14:51,052 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-04-05 06:14:51,052 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:14:51,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:14:51,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1442855301, now seen corresponding path program 26 times [2022-04-05 06:14:51,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:14:51,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587329650] [2022-04-05 06:14:51,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:14:51,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:14:51,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:51,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:14:51,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:51,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:14:51,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:51,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-05 06:14:51,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:51,116 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-04-05 06:14:51,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:14:51,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587329650] [2022-04-05 06:14:51,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587329650] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:14:51,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399659391] [2022-04-05 06:14:51,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 06:14:51,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:14:51,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:14:51,117 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:14:51,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-04-05 06:14:51,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 06:14:51,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:14:51,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-05 06:14:51,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:14:51,262 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-04-05 06:14:51,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:14:51,332 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-04-05 06:14:51,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399659391] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:14:51,332 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:14:51,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 13 [2022-04-05 06:14:51,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389487202] [2022-04-05 06:14:51,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:14:51,333 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-05 06:14:51,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:14:51,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-05 06:14:51,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-04-05 06:14:51,333 INFO L87 Difference]: Start difference. First operand 207 states and 240 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-05 06:14:51,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:14:51,533 INFO L93 Difference]: Finished difference Result 233 states and 270 transitions. [2022-04-05 06:14:51,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-05 06:14:51,534 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2022-04-05 06:14:51,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:14:51,535 INFO L225 Difference]: With dead ends: 233 [2022-04-05 06:14:51,535 INFO L226 Difference]: Without dead ends: 212 [2022-04-05 06:14:51,536 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2022-04-05 06:14:51,536 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 51 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 06:14:51,536 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 72 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 06:14:51,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-04-05 06:14:51,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2022-04-05 06:14:51,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 179 states have (on average 1.1899441340782122) internal successors, (213), 195 states have internal predecessors, (213), 13 states have call successors, (13), 5 states have call predecessors, (13), 19 states have return successors, (19), 11 states have call predecessors, (19), 11 states have call successors, (19) [2022-04-05 06:14:51,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 245 transitions. [2022-04-05 06:14:51,561 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 245 transitions. Word has length 44 [2022-04-05 06:14:51,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:14:51,561 INFO L478 AbstractCegarLoop]: Abstraction has 212 states and 245 transitions. [2022-04-05 06:14:51,561 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-05 06:14:51,562 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 245 transitions. [2022-04-05 06:14:51,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-05 06:14:51,563 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:14:51,563 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:14:51,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-04-05 06:14:51,777 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-04-05 06:14:51,777 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:14:51,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:14:51,778 INFO L85 PathProgramCache]: Analyzing trace with hash 495113378, now seen corresponding path program 27 times [2022-04-05 06:14:51,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:14:51,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705479013] [2022-04-05 06:14:51,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:14:51,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:14:51,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:51,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:14:51,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:51,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:14:51,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:51,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-05 06:14:51,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:52,135 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 06:14:52,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:14:52,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705479013] [2022-04-05 06:14:52,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705479013] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:14:52,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114753256] [2022-04-05 06:14:52,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 06:14:52,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:14:52,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:14:52,152 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:14:52,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-04-05 06:14:52,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-04-05 06:14:52,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:14:52,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-05 06:14:52,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:14:52,492 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 06:14:52,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:14:52,702 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 06:14:52,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114753256] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:14:52,702 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:14:52,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 33 [2022-04-05 06:14:52,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416993401] [2022-04-05 06:14:52,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:14:52,703 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-05 06:14:52,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:14:52,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-05 06:14:52,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=983, Unknown=0, NotChecked=0, Total=1056 [2022-04-05 06:14:52,704 INFO L87 Difference]: Start difference. First operand 212 states and 245 transitions. Second operand has 33 states, 30 states have (on average 1.5) internal successors, (45), 27 states have internal predecessors, (45), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:14:53,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:14:53,948 INFO L93 Difference]: Finished difference Result 270 states and 312 transitions. [2022-04-05 06:14:53,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-05 06:14:53,948 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 1.5) internal successors, (45), 27 states have internal predecessors, (45), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 45 [2022-04-05 06:14:53,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:14:53,950 INFO L225 Difference]: With dead ends: 270 [2022-04-05 06:14:53,950 INFO L226 Difference]: Without dead ends: 264 [2022-04-05 06:14:53,952 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 84 SyntacticMatches, 5 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=205, Invalid=3101, Unknown=0, NotChecked=0, Total=3306 [2022-04-05 06:14:53,952 INFO L913 BasicCegarLoop]: 66 mSDtfsCounter, 145 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 2583 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 2623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 2583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-05 06:14:53,953 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 198 Invalid, 2623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 2583 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-05 06:14:53,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-04-05 06:14:53,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 228. [2022-04-05 06:14:53,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 192 states have (on average 1.1875) internal successors, (228), 210 states have internal predecessors, (228), 14 states have call successors, (14), 5 states have call predecessors, (14), 21 states have return successors, (22), 12 states have call predecessors, (22), 12 states have call successors, (22) [2022-04-05 06:14:53,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 264 transitions. [2022-04-05 06:14:53,992 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 264 transitions. Word has length 45 [2022-04-05 06:14:53,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:14:53,992 INFO L478 AbstractCegarLoop]: Abstraction has 228 states and 264 transitions. [2022-04-05 06:14:53,992 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 1.5) internal successors, (45), 27 states have internal predecessors, (45), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:14:53,992 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 264 transitions. [2022-04-05 06:14:53,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-05 06:14:53,994 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:14:53,994 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:14:54,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-04-05 06:14:54,203 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-04-05 06:14:54,203 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:14:54,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:14:54,204 INFO L85 PathProgramCache]: Analyzing trace with hash 163503975, now seen corresponding path program 28 times [2022-04-05 06:14:54,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:14:54,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325519434] [2022-04-05 06:14:54,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:14:54,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:14:54,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:54,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:14:54,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:54,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:14:54,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:54,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-05 06:14:54,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:54,527 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-05 06:14:54,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:14:54,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325519434] [2022-04-05 06:14:54,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325519434] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:14:54,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36170412] [2022-04-05 06:14:54,527 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 06:14:54,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:14:54,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:14:54,528 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:14:54,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-04-05 06:14:54,588 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 06:14:54,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:14:54,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 43 conjunts are in the unsatisfiable core [2022-04-05 06:14:54,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:14:54,964 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-05 06:14:54,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:14:55,179 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-05 06:14:55,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36170412] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:14:55,180 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:14:55,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 33 [2022-04-05 06:14:55,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156412223] [2022-04-05 06:14:55,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:14:55,180 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-05 06:14:55,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:14:55,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-05 06:14:55,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=979, Unknown=0, NotChecked=0, Total=1056 [2022-04-05 06:14:55,181 INFO L87 Difference]: Start difference. First operand 228 states and 264 transitions. Second operand has 33 states, 30 states have (on average 1.5) internal successors, (45), 27 states have internal predecessors, (45), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:14:56,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:14:56,167 INFO L93 Difference]: Finished difference Result 234 states and 269 transitions. [2022-04-05 06:14:56,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-05 06:14:56,167 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 1.5) internal successors, (45), 27 states have internal predecessors, (45), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 45 [2022-04-05 06:14:56,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:14:56,169 INFO L225 Difference]: With dead ends: 234 [2022-04-05 06:14:56,169 INFO L226 Difference]: Without dead ends: 212 [2022-04-05 06:14:56,171 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 78 SyntacticMatches, 9 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=207, Invalid=2873, Unknown=0, NotChecked=0, Total=3080 [2022-04-05 06:14:56,172 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 91 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 1892 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 1920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-05 06:14:56,172 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 176 Invalid, 1920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1892 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-05 06:14:56,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-04-05 06:14:56,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2022-04-05 06:14:56,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 179 states have (on average 1.1899441340782122) internal successors, (213), 195 states have internal predecessors, (213), 13 states have call successors, (13), 5 states have call predecessors, (13), 19 states have return successors, (20), 11 states have call predecessors, (20), 11 states have call successors, (20) [2022-04-05 06:14:56,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 246 transitions. [2022-04-05 06:14:56,197 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 246 transitions. Word has length 45 [2022-04-05 06:14:56,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:14:56,197 INFO L478 AbstractCegarLoop]: Abstraction has 212 states and 246 transitions. [2022-04-05 06:14:56,198 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 1.5) internal successors, (45), 27 states have internal predecessors, (45), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:14:56,198 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 246 transitions. [2022-04-05 06:14:56,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-05 06:14:56,199 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:14:56,199 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:14:56,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-04-05 06:14:56,415 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:14:56,415 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:14:56,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:14:56,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1863488446, now seen corresponding path program 29 times [2022-04-05 06:14:56,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:14:56,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184333387] [2022-04-05 06:14:56,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:14:56,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:14:56,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:56,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:14:56,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:56,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:14:56,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:56,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-05 06:14:56,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:56,716 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 06:14:56,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:14:56,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184333387] [2022-04-05 06:14:56,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184333387] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:14:56,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938108286] [2022-04-05 06:14:56,717 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 06:14:56,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:14:56,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:14:56,732 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:14:56,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-04-05 06:14:56,800 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-04-05 06:14:56,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:14:56,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-05 06:14:56,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:14:57,203 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 06:14:57,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:14:57,397 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 06:14:57,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938108286] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:14:57,397 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:14:57,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 33 [2022-04-05 06:14:57,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274556634] [2022-04-05 06:14:57,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:14:57,398 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-05 06:14:57,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:14:57,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-05 06:14:57,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=975, Unknown=0, NotChecked=0, Total=1056 [2022-04-05 06:14:57,399 INFO L87 Difference]: Start difference. First operand 212 states and 246 transitions. Second operand has 33 states, 30 states have (on average 1.5) internal successors, (45), 27 states have internal predecessors, (45), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:14:58,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:14:58,199 INFO L93 Difference]: Finished difference Result 230 states and 267 transitions. [2022-04-05 06:14:58,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-05 06:14:58,200 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 1.5) internal successors, (45), 27 states have internal predecessors, (45), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 45 [2022-04-05 06:14:58,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:14:58,201 INFO L225 Difference]: With dead ends: 230 [2022-04-05 06:14:58,201 INFO L226 Difference]: Without dead ends: 224 [2022-04-05 06:14:58,202 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 76 SyntacticMatches, 9 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=209, Invalid=2653, Unknown=0, NotChecked=0, Total=2862 [2022-04-05 06:14:58,203 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 55 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 1317 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 1347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-05 06:14:58,203 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 166 Invalid, 1347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1317 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-05 06:14:58,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-04-05 06:14:58,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 222. [2022-04-05 06:14:58,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 186 states have (on average 1.1935483870967742) internal successors, (222), 204 states have internal predecessors, (222), 14 states have call successors, (14), 5 states have call predecessors, (14), 21 states have return successors, (23), 12 states have call predecessors, (23), 12 states have call successors, (23) [2022-04-05 06:14:58,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 259 transitions. [2022-04-05 06:14:58,240 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 259 transitions. Word has length 45 [2022-04-05 06:14:58,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:14:58,240 INFO L478 AbstractCegarLoop]: Abstraction has 222 states and 259 transitions. [2022-04-05 06:14:58,240 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 1.5) internal successors, (45), 27 states have internal predecessors, (45), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:14:58,240 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 259 transitions. [2022-04-05 06:14:58,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-05 06:14:58,242 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:14:58,242 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:14:58,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-04-05 06:14:58,447 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-04-05 06:14:58,448 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:14:58,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:14:58,448 INFO L85 PathProgramCache]: Analyzing trace with hash 38019997, now seen corresponding path program 30 times [2022-04-05 06:14:58,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:14:58,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662711055] [2022-04-05 06:14:58,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:14:58,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:14:58,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:58,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:14:58,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:58,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:14:58,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:58,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-05 06:14:58,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:14:58,677 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:14:58,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:14:58,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662711055] [2022-04-05 06:14:58,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662711055] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:14:58,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273084339] [2022-04-05 06:14:58,678 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-05 06:14:58,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:14:58,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:14:58,679 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:14:58,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-04-05 06:14:58,731 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-05 06:14:58,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:14:58,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-05 06:14:58,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:14:59,096 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:14:59,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:14:59,610 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:14:59,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273084339] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:14:59,611 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:14:59,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 43 [2022-04-05 06:14:59,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884732566] [2022-04-05 06:14:59,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:14:59,611 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-04-05 06:14:59,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:14:59,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-04-05 06:14:59,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1668, Unknown=0, NotChecked=0, Total=1806 [2022-04-05 06:14:59,612 INFO L87 Difference]: Start difference. First operand 222 states and 259 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:15:01,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:15:01,332 INFO L93 Difference]: Finished difference Result 268 states and 314 transitions. [2022-04-05 06:15:01,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-05 06:15:01,333 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2022-04-05 06:15:01,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:15:01,334 INFO L225 Difference]: With dead ends: 268 [2022-04-05 06:15:01,334 INFO L226 Difference]: Without dead ends: 254 [2022-04-05 06:15:01,338 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=376, Invalid=4046, Unknown=0, NotChecked=0, Total=4422 [2022-04-05 06:15:01,339 INFO L913 BasicCegarLoop]: 74 mSDtfsCounter, 482 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 2353 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 2417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 2353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-05 06:15:01,340 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [487 Valid, 191 Invalid, 2417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 2353 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-05 06:15:01,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-04-05 06:15:01,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 245. [2022-04-05 06:15:01,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 206 states have (on average 1.1941747572815533) internal successors, (246), 226 states have internal predecessors, (246), 15 states have call successors, (15), 5 states have call predecessors, (15), 23 states have return successors, (26), 13 states have call predecessors, (26), 13 states have call successors, (26) [2022-04-05 06:15:01,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 287 transitions. [2022-04-05 06:15:01,374 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 287 transitions. Word has length 46 [2022-04-05 06:15:01,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:15:01,374 INFO L478 AbstractCegarLoop]: Abstraction has 245 states and 287 transitions. [2022-04-05 06:15:01,374 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:15:01,374 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 287 transitions. [2022-04-05 06:15:01,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-05 06:15:01,376 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:15:01,376 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:15:01,394 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-04-05 06:15:01,591 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-04-05 06:15:01,591 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:15:01,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:15:01,592 INFO L85 PathProgramCache]: Analyzing trace with hash 965202579, now seen corresponding path program 31 times [2022-04-05 06:15:01,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:15:01,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515413068] [2022-04-05 06:15:01,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:15:01,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:15:01,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:01,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:15:01,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:01,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:15:01,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:01,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-05 06:15:01,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:01,825 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:15:01,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:15:01,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515413068] [2022-04-05 06:15:01,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515413068] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:15:01,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799665244] [2022-04-05 06:15:01,825 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-05 06:15:01,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:15:01,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:15:01,840 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:15:01,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-04-05 06:15:01,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:01,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-05 06:15:01,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:15:02,330 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:15:02,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:15:02,863 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:15:02,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799665244] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:15:02,864 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:15:02,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 43 [2022-04-05 06:15:02,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70303176] [2022-04-05 06:15:02,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:15:02,864 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-04-05 06:15:02,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:15:02,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-04-05 06:15:02,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1668, Unknown=0, NotChecked=0, Total=1806 [2022-04-05 06:15:02,865 INFO L87 Difference]: Start difference. First operand 245 states and 287 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:15:04,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:15:04,692 INFO L93 Difference]: Finished difference Result 260 states and 302 transitions. [2022-04-05 06:15:04,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-05 06:15:04,693 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2022-04-05 06:15:04,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:15:04,694 INFO L225 Difference]: With dead ends: 260 [2022-04-05 06:15:04,694 INFO L226 Difference]: Without dead ends: 248 [2022-04-05 06:15:04,695 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=376, Invalid=4046, Unknown=0, NotChecked=0, Total=4422 [2022-04-05 06:15:04,696 INFO L913 BasicCegarLoop]: 76 mSDtfsCounter, 488 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 2485 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 499 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 2540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 2485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-05 06:15:04,696 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [499 Valid, 198 Invalid, 2540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 2485 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-05 06:15:04,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-04-05 06:15:04,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 246. [2022-04-05 06:15:04,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 207 states have (on average 1.1932367149758454) internal successors, (247), 227 states have internal predecessors, (247), 15 states have call successors, (15), 5 states have call predecessors, (15), 23 states have return successors, (24), 13 states have call predecessors, (24), 13 states have call successors, (24) [2022-04-05 06:15:04,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 286 transitions. [2022-04-05 06:15:04,742 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 286 transitions. Word has length 46 [2022-04-05 06:15:04,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:15:04,742 INFO L478 AbstractCegarLoop]: Abstraction has 246 states and 286 transitions. [2022-04-05 06:15:04,742 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:15:04,742 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 286 transitions. [2022-04-05 06:15:04,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-05 06:15:04,744 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:15:04,744 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:15:04,767 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-04-05 06:15:04,947 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:15:04,947 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:15:04,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:15:04,948 INFO L85 PathProgramCache]: Analyzing trace with hash -2018214053, now seen corresponding path program 32 times [2022-04-05 06:15:04,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:15:04,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521565030] [2022-04-05 06:15:04,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:15:04,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:15:04,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:04,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:15:04,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:04,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:15:04,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:04,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-05 06:15:04,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:05,012 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-04-05 06:15:05,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:15:05,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521565030] [2022-04-05 06:15:05,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521565030] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:15:05,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7548613] [2022-04-05 06:15:05,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 06:15:05,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:15:05,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:15:05,013 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:15:05,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-04-05 06:15:05,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 06:15:05,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:15:05,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-05 06:15:05,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:15:05,171 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-04-05 06:15:05,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:15:05,237 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-04-05 06:15:05,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7548613] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:15:05,237 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:15:05,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 15 [2022-04-05 06:15:05,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598757215] [2022-04-05 06:15:05,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:15:05,238 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-05 06:15:05,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:15:05,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-05 06:15:05,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-04-05 06:15:05,238 INFO L87 Difference]: Start difference. First operand 246 states and 286 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-05 06:15:05,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:15:05,528 INFO L93 Difference]: Finished difference Result 332 states and 391 transitions. [2022-04-05 06:15:05,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-05 06:15:05,528 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 46 [2022-04-05 06:15:05,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:15:05,530 INFO L225 Difference]: With dead ends: 332 [2022-04-05 06:15:05,530 INFO L226 Difference]: Without dead ends: 302 [2022-04-05 06:15:05,531 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=223, Invalid=589, Unknown=0, NotChecked=0, Total=812 [2022-04-05 06:15:05,532 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 79 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 06:15:05,532 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 82 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 06:15:05,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-04-05 06:15:05,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 284. [2022-04-05 06:15:05,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 245 states have (on average 1.1918367346938776) internal successors, (292), 265 states have internal predecessors, (292), 15 states have call successors, (15), 5 states have call predecessors, (15), 23 states have return successors, (24), 13 states have call predecessors, (24), 13 states have call successors, (24) [2022-04-05 06:15:05,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 331 transitions. [2022-04-05 06:15:05,597 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 331 transitions. Word has length 46 [2022-04-05 06:15:05,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:15:05,597 INFO L478 AbstractCegarLoop]: Abstraction has 284 states and 331 transitions. [2022-04-05 06:15:05,597 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-05 06:15:05,597 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 331 transitions. [2022-04-05 06:15:05,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-05 06:15:05,599 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:15:05,600 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:15:05,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-04-05 06:15:05,815 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:15:05,815 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:15:05,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:15:05,816 INFO L85 PathProgramCache]: Analyzing trace with hash -701840234, now seen corresponding path program 33 times [2022-04-05 06:15:05,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:15:05,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597238226] [2022-04-05 06:15:05,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:15:05,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:15:05,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:05,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:15:05,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:05,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:15:05,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:05,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-05 06:15:05,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:05,896 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-04-05 06:15:05,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:15:05,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597238226] [2022-04-05 06:15:05,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597238226] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:15:05,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720400858] [2022-04-05 06:15:05,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 06:15:05,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:15:05,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:15:05,912 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:15:05,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-04-05 06:15:05,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-04-05 06:15:05,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:15:05,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-05 06:15:05,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:15:06,080 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-04-05 06:15:06,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:15:06,154 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-04-05 06:15:06,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720400858] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:15:06,154 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:15:06,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 15 [2022-04-05 06:15:06,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732363691] [2022-04-05 06:15:06,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:15:06,155 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-05 06:15:06,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:15:06,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-05 06:15:06,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-04-05 06:15:06,156 INFO L87 Difference]: Start difference. First operand 284 states and 331 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 14 states have internal predecessors, (50), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:15:06,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:15:06,425 INFO L93 Difference]: Finished difference Result 525 states and 613 transitions. [2022-04-05 06:15:06,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-05 06:15:06,426 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 14 states have internal predecessors, (50), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 46 [2022-04-05 06:15:06,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:15:06,444 INFO L225 Difference]: With dead ends: 525 [2022-04-05 06:15:06,444 INFO L226 Difference]: Without dead ends: 340 [2022-04-05 06:15:06,445 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=223, Invalid=589, Unknown=0, NotChecked=0, Total=812 [2022-04-05 06:15:06,446 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 107 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 06:15:06,446 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 57 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 06:15:06,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2022-04-05 06:15:06,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 322. [2022-04-05 06:15:06,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 283 states have (on average 1.1908127208480566) internal successors, (337), 303 states have internal predecessors, (337), 15 states have call successors, (15), 5 states have call predecessors, (15), 23 states have return successors, (24), 13 states have call predecessors, (24), 13 states have call successors, (24) [2022-04-05 06:15:06,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 376 transitions. [2022-04-05 06:15:06,500 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 376 transitions. Word has length 46 [2022-04-05 06:15:06,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:15:06,500 INFO L478 AbstractCegarLoop]: Abstraction has 322 states and 376 transitions. [2022-04-05 06:15:06,500 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 14 states have internal predecessors, (50), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:15:06,500 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 376 transitions. [2022-04-05 06:15:06,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-05 06:15:06,502 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:15:06,502 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:15:06,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-04-05 06:15:06,719 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-04-05 06:15:06,719 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:15:06,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:15:06,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1725883340, now seen corresponding path program 34 times [2022-04-05 06:15:06,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:15:06,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904840435] [2022-04-05 06:15:06,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:15:06,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:15:06,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:06,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:15:06,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:06,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:15:06,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:06,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-05 06:15:06,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:07,121 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 06:15:07,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:15:07,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904840435] [2022-04-05 06:15:07,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904840435] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:15:07,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291606246] [2022-04-05 06:15:07,121 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 06:15:07,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:15:07,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:15:07,122 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:15:07,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-04-05 06:15:07,181 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 06:15:07,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:15:07,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 51 conjunts are in the unsatisfiable core [2022-04-05 06:15:07,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:15:07,472 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 06:15:07,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:15:07,663 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 06:15:07,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291606246] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:15:07,663 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:15:07,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 35 [2022-04-05 06:15:07,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823053551] [2022-04-05 06:15:07,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:15:07,663 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-04-05 06:15:07,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:15:07,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-04-05 06:15:07,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1113, Unknown=0, NotChecked=0, Total=1190 [2022-04-05 06:15:07,664 INFO L87 Difference]: Start difference. First operand 322 states and 376 transitions. Second operand has 35 states, 32 states have (on average 1.46875) internal successors, (47), 29 states have internal predecessors, (47), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:15:09,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:15:09,142 INFO L93 Difference]: Finished difference Result 392 states and 457 transitions. [2022-04-05 06:15:09,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-05 06:15:09,143 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 1.46875) internal successors, (47), 29 states have internal predecessors, (47), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 47 [2022-04-05 06:15:09,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:15:09,144 INFO L225 Difference]: With dead ends: 392 [2022-04-05 06:15:09,144 INFO L226 Difference]: Without dead ends: 386 [2022-04-05 06:15:09,146 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 88 SyntacticMatches, 5 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=217, Invalid=3565, Unknown=0, NotChecked=0, Total=3782 [2022-04-05 06:15:09,146 INFO L913 BasicCegarLoop]: 78 mSDtfsCounter, 170 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 3155 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 3197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 3155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-05 06:15:09,146 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 215 Invalid, 3197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 3155 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-05 06:15:09,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2022-04-05 06:15:09,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 338. [2022-04-05 06:15:09,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 296 states have (on average 1.1891891891891893) internal successors, (352), 318 states have internal predecessors, (352), 16 states have call successors, (16), 5 states have call predecessors, (16), 25 states have return successors, (27), 14 states have call predecessors, (27), 14 states have call successors, (27) [2022-04-05 06:15:09,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 395 transitions. [2022-04-05 06:15:09,202 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 395 transitions. Word has length 47 [2022-04-05 06:15:09,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:15:09,202 INFO L478 AbstractCegarLoop]: Abstraction has 338 states and 395 transitions. [2022-04-05 06:15:09,202 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 1.46875) internal successors, (47), 29 states have internal predecessors, (47), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:15:09,202 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 395 transitions. [2022-04-05 06:15:09,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-05 06:15:09,204 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:15:09,204 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:15:09,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-04-05 06:15:09,420 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:15:09,420 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:15:09,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:15:09,421 INFO L85 PathProgramCache]: Analyzing trace with hash -821910985, now seen corresponding path program 35 times [2022-04-05 06:15:09,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:15:09,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762320955] [2022-04-05 06:15:09,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:15:09,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:15:09,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:09,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:15:09,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:09,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:15:09,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:09,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-05 06:15:09,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:09,738 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-05 06:15:09,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:15:09,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762320955] [2022-04-05 06:15:09,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762320955] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:15:09,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763424087] [2022-04-05 06:15:09,738 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 06:15:09,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:15:09,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:15:09,739 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:15:09,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-04-05 06:15:09,798 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-04-05 06:15:09,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:15:09,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-05 06:15:09,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:15:10,162 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-05 06:15:10,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:15:10,385 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-05 06:15:10,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763424087] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:15:10,385 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:15:10,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 35 [2022-04-05 06:15:10,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922381949] [2022-04-05 06:15:10,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:15:10,386 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-04-05 06:15:10,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:15:10,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-04-05 06:15:10,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1109, Unknown=0, NotChecked=0, Total=1190 [2022-04-05 06:15:10,386 INFO L87 Difference]: Start difference. First operand 338 states and 395 transitions. Second operand has 35 states, 32 states have (on average 1.46875) internal successors, (47), 29 states have internal predecessors, (47), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:15:11,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:15:11,565 INFO L93 Difference]: Finished difference Result 344 states and 400 transitions. [2022-04-05 06:15:11,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-05 06:15:11,566 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 1.46875) internal successors, (47), 29 states have internal predecessors, (47), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 47 [2022-04-05 06:15:11,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:15:11,567 INFO L225 Difference]: With dead ends: 344 [2022-04-05 06:15:11,567 INFO L226 Difference]: Without dead ends: 322 [2022-04-05 06:15:11,569 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 82 SyntacticMatches, 9 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=219, Invalid=3321, Unknown=0, NotChecked=0, Total=3540 [2022-04-05 06:15:11,569 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 115 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 2220 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 2252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 2220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-05 06:15:11,569 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 185 Invalid, 2252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 2220 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-05 06:15:11,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2022-04-05 06:15:11,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 322. [2022-04-05 06:15:11,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 283 states have (on average 1.1908127208480566) internal successors, (337), 303 states have internal predecessors, (337), 15 states have call successors, (15), 5 states have call predecessors, (15), 23 states have return successors, (25), 13 states have call predecessors, (25), 13 states have call successors, (25) [2022-04-05 06:15:11,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 377 transitions. [2022-04-05 06:15:11,630 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 377 transitions. Word has length 47 [2022-04-05 06:15:11,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:15:11,630 INFO L478 AbstractCegarLoop]: Abstraction has 322 states and 377 transitions. [2022-04-05 06:15:11,630 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 1.46875) internal successors, (47), 29 states have internal predecessors, (47), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:15:11,631 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 377 transitions. [2022-04-05 06:15:11,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-05 06:15:11,632 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:15:11,632 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:15:11,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-04-05 06:15:11,844 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-04-05 06:15:11,845 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:15:11,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:15:11,845 INFO L85 PathProgramCache]: Analyzing trace with hash 870449050, now seen corresponding path program 36 times [2022-04-05 06:15:11,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:15:11,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622425727] [2022-04-05 06:15:11,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:15:11,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:15:11,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:11,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:15:11,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:11,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:15:11,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:11,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-05 06:15:11,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:12,035 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-05 06:15:12,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:15:12,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622425727] [2022-04-05 06:15:12,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622425727] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:15:12,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384684055] [2022-04-05 06:15:12,035 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-05 06:15:12,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:15:12,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:15:12,036 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:15:12,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-04-05 06:15:12,096 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-05 06:15:12,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:15:12,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-05 06:15:12,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:15:12,339 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-04-05 06:15:12,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:15:12,700 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-04-05 06:15:12,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384684055] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:15:12,700 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:15:12,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 13] total 33 [2022-04-05 06:15:12,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356849410] [2022-04-05 06:15:12,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:15:12,701 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-05 06:15:12,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:15:12,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-05 06:15:12,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=945, Unknown=0, NotChecked=0, Total=1056 [2022-04-05 06:15:12,701 INFO L87 Difference]: Start difference. First operand 322 states and 377 transitions. Second operand has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:15:13,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:15:13,691 INFO L93 Difference]: Finished difference Result 378 states and 443 transitions. [2022-04-05 06:15:13,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-05 06:15:13,691 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2022-04-05 06:15:13,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:15:13,693 INFO L225 Difference]: With dead ends: 378 [2022-04-05 06:15:13,693 INFO L226 Difference]: Without dead ends: 362 [2022-04-05 06:15:13,695 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 76 SyntacticMatches, 6 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=252, Invalid=2100, Unknown=0, NotChecked=0, Total=2352 [2022-04-05 06:15:13,702 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 270 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1340 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 1377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-05 06:15:13,702 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 151 Invalid, 1377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1340 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-05 06:15:13,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-04-05 06:15:13,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 357. [2022-04-05 06:15:13,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 303 states have (on average 1.174917491749175) internal successors, (356), 333 states have internal predecessors, (356), 20 states have call successors, (20), 5 states have call predecessors, (20), 33 states have return successors, (40), 18 states have call predecessors, (40), 18 states have call successors, (40) [2022-04-05 06:15:13,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 416 transitions. [2022-04-05 06:15:13,760 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 416 transitions. Word has length 47 [2022-04-05 06:15:13,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:15:13,761 INFO L478 AbstractCegarLoop]: Abstraction has 357 states and 416 transitions. [2022-04-05 06:15:13,761 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:15:13,761 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 416 transitions. [2022-04-05 06:15:13,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-05 06:15:13,763 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:15:13,763 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:15:13,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-04-05 06:15:13,967 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:15:13,968 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:15:13,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:15:13,968 INFO L85 PathProgramCache]: Analyzing trace with hash -545415892, now seen corresponding path program 37 times [2022-04-05 06:15:13,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:15:13,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066547832] [2022-04-05 06:15:13,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:15:13,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:15:13,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:14,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:15:14,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:14,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:15:14,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:14,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-05 06:15:14,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:14,275 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 06:15:14,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:15:14,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066547832] [2022-04-05 06:15:14,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066547832] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:15:14,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597023956] [2022-04-05 06:15:14,276 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-05 06:15:14,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:15:14,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:15:14,277 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:15:14,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-04-05 06:15:14,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:14,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 43 conjunts are in the unsatisfiable core [2022-04-05 06:15:14,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:15:14,732 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 06:15:14,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:15:14,959 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 06:15:14,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597023956] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:15:14,959 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:15:14,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 35 [2022-04-05 06:15:14,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70364692] [2022-04-05 06:15:14,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:15:14,963 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-04-05 06:15:14,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:15:14,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-04-05 06:15:14,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1105, Unknown=0, NotChecked=0, Total=1190 [2022-04-05 06:15:14,964 INFO L87 Difference]: Start difference. First operand 357 states and 416 transitions. Second operand has 35 states, 32 states have (on average 1.46875) internal successors, (47), 29 states have internal predecessors, (47), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:15:15,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:15:15,817 INFO L93 Difference]: Finished difference Result 375 states and 438 transitions. [2022-04-05 06:15:15,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-05 06:15:15,818 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 1.46875) internal successors, (47), 29 states have internal predecessors, (47), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 47 [2022-04-05 06:15:15,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:15:15,819 INFO L225 Difference]: With dead ends: 375 [2022-04-05 06:15:15,819 INFO L226 Difference]: Without dead ends: 359 [2022-04-05 06:15:15,821 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 80 SyntacticMatches, 9 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=221, Invalid=3085, Unknown=0, NotChecked=0, Total=3306 [2022-04-05 06:15:15,821 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 76 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 1466 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 1498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-05 06:15:15,821 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 158 Invalid, 1498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1466 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-05 06:15:15,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-04-05 06:15:15,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 354. [2022-04-05 06:15:15,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 300 states have (on average 1.18) internal successors, (354), 330 states have internal predecessors, (354), 20 states have call successors, (20), 5 states have call predecessors, (20), 33 states have return successors, (40), 18 states have call predecessors, (40), 18 states have call successors, (40) [2022-04-05 06:15:15,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 414 transitions. [2022-04-05 06:15:15,874 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 414 transitions. Word has length 47 [2022-04-05 06:15:15,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:15:15,874 INFO L478 AbstractCegarLoop]: Abstraction has 354 states and 414 transitions. [2022-04-05 06:15:15,874 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 1.46875) internal successors, (47), 29 states have internal predecessors, (47), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:15:15,874 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 414 transitions. [2022-04-05 06:15:15,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-05 06:15:15,876 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:15:15,876 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:15:15,892 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-04-05 06:15:16,082 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-04-05 06:15:16,083 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:15:16,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:15:16,083 INFO L85 PathProgramCache]: Analyzing trace with hash 942955759, now seen corresponding path program 38 times [2022-04-05 06:15:16,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:15:16,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422416326] [2022-04-05 06:15:16,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:15:16,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:15:16,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:16,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:15:16,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:16,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:15:16,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:16,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-04-05 06:15:16,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:16,264 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-05 06:15:16,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:15:16,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422416326] [2022-04-05 06:15:16,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422416326] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:15:16,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004218086] [2022-04-05 06:15:16,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 06:15:16,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:15:16,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:15:16,266 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:15:16,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-04-05 06:15:16,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 06:15:16,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:15:16,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-05 06:15:16,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:15:16,541 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-04-05 06:15:16,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:15:16,882 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-04-05 06:15:16,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004218086] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:15:16,883 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:15:16,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 13] total 33 [2022-04-05 06:15:16,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033517472] [2022-04-05 06:15:16,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:15:16,883 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-05 06:15:16,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:15:16,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-05 06:15:16,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=945, Unknown=0, NotChecked=0, Total=1056 [2022-04-05 06:15:16,884 INFO L87 Difference]: Start difference. First operand 354 states and 414 transitions. Second operand has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:15:17,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:15:17,740 INFO L93 Difference]: Finished difference Result 368 states and 427 transitions. [2022-04-05 06:15:17,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-05 06:15:17,741 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2022-04-05 06:15:17,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:15:17,742 INFO L225 Difference]: With dead ends: 368 [2022-04-05 06:15:17,742 INFO L226 Difference]: Without dead ends: 346 [2022-04-05 06:15:17,744 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 76 SyntacticMatches, 6 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=252, Invalid=2100, Unknown=0, NotChecked=0, Total=2352 [2022-04-05 06:15:17,744 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 330 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1260 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 1290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-05 06:15:17,744 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [337 Valid, 139 Invalid, 1290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1260 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-05 06:15:17,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2022-04-05 06:15:17,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 344. [2022-04-05 06:15:17,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 290 states have (on average 1.1793103448275861) internal successors, (342), 320 states have internal predecessors, (342), 20 states have call successors, (20), 5 states have call predecessors, (20), 33 states have return successors, (36), 18 states have call predecessors, (36), 18 states have call successors, (36) [2022-04-05 06:15:17,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 398 transitions. [2022-04-05 06:15:17,794 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 398 transitions. Word has length 47 [2022-04-05 06:15:17,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:15:17,796 INFO L478 AbstractCegarLoop]: Abstraction has 344 states and 398 transitions. [2022-04-05 06:15:17,796 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:15:17,796 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 398 transitions. [2022-04-05 06:15:17,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-04-05 06:15:17,798 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:15:17,798 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:15:17,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-04-05 06:15:18,014 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-04-05 06:15:18,014 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:15:18,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:15:18,015 INFO L85 PathProgramCache]: Analyzing trace with hash -462816845, now seen corresponding path program 39 times [2022-04-05 06:15:18,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:15:18,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366898490] [2022-04-05 06:15:18,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:15:18,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:15:18,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:18,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:15:18,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:18,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:15:18,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:18,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-05 06:15:18,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:18,284 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:15:18,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:15:18,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366898490] [2022-04-05 06:15:18,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366898490] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:15:18,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918697019] [2022-04-05 06:15:18,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 06:15:18,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:15:18,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:15:18,285 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:15:18,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-04-05 06:15:18,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-04-05 06:15:18,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:15:18,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-05 06:15:18,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:15:18,785 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:15:18,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:15:19,375 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:15:19,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918697019] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:15:19,376 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:15:19,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 49 [2022-04-05 06:15:19,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855194119] [2022-04-05 06:15:19,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:15:19,376 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-04-05 06:15:19,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:15:19,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-04-05 06:15:19,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=2193, Unknown=0, NotChecked=0, Total=2352 [2022-04-05 06:15:19,377 INFO L87 Difference]: Start difference. First operand 344 states and 398 transitions. Second operand has 49 states, 49 states have (on average 1.6734693877551021) internal successors, (82), 48 states have internal predecessors, (82), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:15:21,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:15:21,538 INFO L93 Difference]: Finished difference Result 410 states and 477 transitions. [2022-04-05 06:15:21,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-05 06:15:21,538 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.6734693877551021) internal successors, (82), 48 states have internal predecessors, (82), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 48 [2022-04-05 06:15:21,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:15:21,540 INFO L225 Difference]: With dead ends: 410 [2022-04-05 06:15:21,540 INFO L226 Difference]: Without dead ends: 396 [2022-04-05 06:15:21,542 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=458, Invalid=5394, Unknown=0, NotChecked=0, Total=5852 [2022-04-05 06:15:21,542 INFO L913 BasicCegarLoop]: 84 mSDtfsCounter, 600 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 3293 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 605 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 3374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 3293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-05 06:15:21,544 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [605 Valid, 226 Invalid, 3374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 3293 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-05 06:15:21,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2022-04-05 06:15:21,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 387. [2022-04-05 06:15:21,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 327 states have (on average 1.1773700305810397) internal successors, (385), 361 states have internal predecessors, (385), 22 states have call successors, (22), 5 states have call predecessors, (22), 37 states have return successors, (42), 20 states have call predecessors, (42), 20 states have call successors, (42) [2022-04-05 06:15:21,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 449 transitions. [2022-04-05 06:15:21,605 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 449 transitions. Word has length 48 [2022-04-05 06:15:21,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:15:21,605 INFO L478 AbstractCegarLoop]: Abstraction has 387 states and 449 transitions. [2022-04-05 06:15:21,605 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.6734693877551021) internal successors, (82), 48 states have internal predecessors, (82), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:15:21,605 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 449 transitions. [2022-04-05 06:15:21,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-04-05 06:15:21,607 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:15:21,607 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:15:21,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-04-05 06:15:21,808 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-04-05 06:15:21,808 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:15:21,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:15:21,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1784927875, now seen corresponding path program 40 times [2022-04-05 06:15:21,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:15:21,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743244581] [2022-04-05 06:15:21,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:15:21,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:15:21,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:21,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:15:21,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:21,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:15:21,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:21,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-04-05 06:15:21,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:22,045 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:15:22,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:15:22,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743244581] [2022-04-05 06:15:22,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743244581] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:15:22,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738112371] [2022-04-05 06:15:22,046 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 06:15:22,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:15:22,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:15:22,048 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:15:22,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-04-05 06:15:22,104 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 06:15:22,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:15:22,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-05 06:15:22,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:15:22,570 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:15:22,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:15:23,135 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:15:23,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738112371] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:15:23,135 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:15:23,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 49 [2022-04-05 06:15:23,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936135303] [2022-04-05 06:15:23,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:15:23,136 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-04-05 06:15:23,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:15:23,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-04-05 06:15:23,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=2193, Unknown=0, NotChecked=0, Total=2352 [2022-04-05 06:15:23,137 INFO L87 Difference]: Start difference. First operand 387 states and 449 transitions. Second operand has 49 states, 49 states have (on average 1.6734693877551021) internal successors, (82), 48 states have internal predecessors, (82), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:15:25,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:15:25,125 INFO L93 Difference]: Finished difference Result 402 states and 464 transitions. [2022-04-05 06:15:25,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-05 06:15:25,125 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.6734693877551021) internal successors, (82), 48 states have internal predecessors, (82), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 48 [2022-04-05 06:15:25,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:15:25,127 INFO L225 Difference]: With dead ends: 402 [2022-04-05 06:15:25,127 INFO L226 Difference]: Without dead ends: 390 [2022-04-05 06:15:25,128 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=458, Invalid=5394, Unknown=0, NotChecked=0, Total=5852 [2022-04-05 06:15:25,129 INFO L913 BasicCegarLoop]: 86 mSDtfsCounter, 683 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 2912 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 696 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 2982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 2912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-05 06:15:25,129 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [696 Valid, 208 Invalid, 2982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 2912 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-05 06:15:25,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-04-05 06:15:25,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 388. [2022-04-05 06:15:25,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 328 states have (on average 1.1768292682926829) internal successors, (386), 362 states have internal predecessors, (386), 22 states have call successors, (22), 5 states have call predecessors, (22), 37 states have return successors, (39), 20 states have call predecessors, (39), 20 states have call successors, (39) [2022-04-05 06:15:25,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 447 transitions. [2022-04-05 06:15:25,199 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 447 transitions. Word has length 48 [2022-04-05 06:15:25,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:15:25,200 INFO L478 AbstractCegarLoop]: Abstraction has 388 states and 447 transitions. [2022-04-05 06:15:25,200 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.6734693877551021) internal successors, (82), 48 states have internal predecessors, (82), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:15:25,200 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 447 transitions. [2022-04-05 06:15:25,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-04-05 06:15:25,202 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:15:25,202 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:15:25,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-04-05 06:15:25,418 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-04-05 06:15:25,418 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:15:25,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:15:25,418 INFO L85 PathProgramCache]: Analyzing trace with hash 319517281, now seen corresponding path program 41 times [2022-04-05 06:15:25,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:15:25,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88547008] [2022-04-05 06:15:25,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:15:25,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:15:25,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:25,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:15:25,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:25,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:15:25,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:25,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-05 06:15:25,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:25,477 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-04-05 06:15:25,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:15:25,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88547008] [2022-04-05 06:15:25,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88547008] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:15:25,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216942162] [2022-04-05 06:15:25,477 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 06:15:25,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:15:25,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:15:25,484 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:15:25,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-04-05 06:15:25,540 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-04-05 06:15:25,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:15:25,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-05 06:15:25,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:15:25,622 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-04-05 06:15:25,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:15:25,679 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-04-05 06:15:25,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216942162] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:15:25,679 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:15:25,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 16 [2022-04-05 06:15:25,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649921064] [2022-04-05 06:15:25,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:15:25,680 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-05 06:15:25,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:15:25,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-05 06:15:25,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2022-04-05 06:15:25,680 INFO L87 Difference]: Start difference. First operand 388 states and 447 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:15:25,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:15:25,952 INFO L93 Difference]: Finished difference Result 593 states and 672 transitions. [2022-04-05 06:15:25,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-05 06:15:25,952 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 48 [2022-04-05 06:15:25,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:15:25,954 INFO L225 Difference]: With dead ends: 593 [2022-04-05 06:15:25,954 INFO L226 Difference]: Without dead ends: 383 [2022-04-05 06:15:25,956 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=301, Invalid=629, Unknown=0, NotChecked=0, Total=930 [2022-04-05 06:15:25,957 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 75 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 06:15:25,957 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 66 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 06:15:25,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-04-05 06:15:26,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 375. [2022-04-05 06:15:26,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 321 states have (on average 1.1682242990654206) internal successors, (375), 351 states have internal predecessors, (375), 20 states have call successors, (20), 5 states have call predecessors, (20), 33 states have return successors, (33), 18 states have call predecessors, (33), 18 states have call successors, (33) [2022-04-05 06:15:26,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 428 transitions. [2022-04-05 06:15:26,026 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 428 transitions. Word has length 48 [2022-04-05 06:15:26,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:15:26,026 INFO L478 AbstractCegarLoop]: Abstraction has 375 states and 428 transitions. [2022-04-05 06:15:26,026 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:15:26,026 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 428 transitions. [2022-04-05 06:15:26,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-04-05 06:15:26,028 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:15:26,028 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:15:26,044 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-04-05 06:15:26,228 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:15:26,228 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:15:26,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:15:26,229 INFO L85 PathProgramCache]: Analyzing trace with hash -392786666, now seen corresponding path program 42 times [2022-04-05 06:15:26,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:15:26,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446457146] [2022-04-05 06:15:26,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:15:26,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:15:26,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:26,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:15:26,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:26,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:15:26,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:26,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-04-05 06:15:26,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:26,297 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-04-05 06:15:26,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:15:26,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446457146] [2022-04-05 06:15:26,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446457146] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:15:26,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630545750] [2022-04-05 06:15:26,297 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-05 06:15:26,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:15:26,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:15:26,298 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:15:26,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-04-05 06:15:26,361 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-05 06:15:26,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:15:26,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-05 06:15:26,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:15:26,438 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-04-05 06:15:26,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:15:26,497 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-04-05 06:15:26,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630545750] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:15:26,497 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:15:26,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 16 [2022-04-05 06:15:26,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205814663] [2022-04-05 06:15:26,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:15:26,497 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-05 06:15:26,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:15:26,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-05 06:15:26,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2022-04-05 06:15:26,498 INFO L87 Difference]: Start difference. First operand 375 states and 428 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-05 06:15:26,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:15:26,781 INFO L93 Difference]: Finished difference Result 409 states and 468 transitions. [2022-04-05 06:15:26,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-05 06:15:26,781 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 48 [2022-04-05 06:15:26,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:15:26,782 INFO L225 Difference]: With dead ends: 409 [2022-04-05 06:15:26,782 INFO L226 Difference]: Without dead ends: 382 [2022-04-05 06:15:26,784 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=301, Invalid=629, Unknown=0, NotChecked=0, Total=930 [2022-04-05 06:15:26,784 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 69 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 06:15:26,785 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 66 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 06:15:26,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2022-04-05 06:15:26,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 382. [2022-04-05 06:15:26,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 328 states have (on average 1.1646341463414633) internal successors, (382), 358 states have internal predecessors, (382), 20 states have call successors, (20), 5 states have call predecessors, (20), 33 states have return successors, (33), 18 states have call predecessors, (33), 18 states have call successors, (33) [2022-04-05 06:15:26,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 435 transitions. [2022-04-05 06:15:26,857 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 435 transitions. Word has length 48 [2022-04-05 06:15:26,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:15:26,857 INFO L478 AbstractCegarLoop]: Abstraction has 382 states and 435 transitions. [2022-04-05 06:15:26,857 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-05 06:15:26,857 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 435 transitions. [2022-04-05 06:15:26,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-05 06:15:26,859 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:15:26,859 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:15:26,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-04-05 06:15:27,059 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:15:27,060 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:15:27,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:15:27,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1923782110, now seen corresponding path program 43 times [2022-04-05 06:15:27,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:15:27,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020083187] [2022-04-05 06:15:27,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:15:27,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:15:27,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:27,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:15:27,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:27,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:15:27,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:27,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-04-05 06:15:27,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:27,462 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 06:15:27,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:15:27,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020083187] [2022-04-05 06:15:27,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020083187] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:15:27,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145545556] [2022-04-05 06:15:27,463 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-05 06:15:27,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:15:27,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:15:27,463 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:15:27,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-04-05 06:15:27,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:27,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-05 06:15:27,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:15:27,796 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 06:15:27,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:15:27,988 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 06:15:27,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145545556] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:15:27,988 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:15:27,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 37 [2022-04-05 06:15:27,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139152746] [2022-04-05 06:15:27,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:15:27,989 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-04-05 06:15:27,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:15:27,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-04-05 06:15:27,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1251, Unknown=0, NotChecked=0, Total=1332 [2022-04-05 06:15:27,989 INFO L87 Difference]: Start difference. First operand 382 states and 435 transitions. Second operand has 37 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 31 states have internal predecessors, (49), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:15:29,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:15:29,572 INFO L93 Difference]: Finished difference Result 460 states and 524 transitions. [2022-04-05 06:15:29,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-05 06:15:29,573 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 31 states have internal predecessors, (49), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2022-04-05 06:15:29,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:15:29,575 INFO L225 Difference]: With dead ends: 460 [2022-04-05 06:15:29,576 INFO L226 Difference]: Without dead ends: 454 [2022-04-05 06:15:29,578 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 92 SyntacticMatches, 5 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=229, Invalid=4061, Unknown=0, NotChecked=0, Total=4290 [2022-04-05 06:15:29,578 INFO L913 BasicCegarLoop]: 86 mSDtfsCounter, 187 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 3927 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 3973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 3927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-05 06:15:29,579 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 238 Invalid, 3973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 3927 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-05 06:15:29,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2022-04-05 06:15:29,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 398. [2022-04-05 06:15:29,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 341 states have (on average 1.1642228739002933) internal successors, (397), 373 states have internal predecessors, (397), 21 states have call successors, (21), 5 states have call predecessors, (21), 35 states have return successors, (36), 19 states have call predecessors, (36), 19 states have call successors, (36) [2022-04-05 06:15:29,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 454 transitions. [2022-04-05 06:15:29,660 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 454 transitions. Word has length 49 [2022-04-05 06:15:29,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:15:29,660 INFO L478 AbstractCegarLoop]: Abstraction has 398 states and 454 transitions. [2022-04-05 06:15:29,660 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 31 states have internal predecessors, (49), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:15:29,660 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 454 transitions. [2022-04-05 06:15:29,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-05 06:15:29,662 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:15:29,663 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:15:29,704 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-04-05 06:15:29,878 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-04-05 06:15:29,878 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:15:29,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:15:29,879 INFO L85 PathProgramCache]: Analyzing trace with hash 2087113895, now seen corresponding path program 44 times [2022-04-05 06:15:29,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:15:29,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972058331] [2022-04-05 06:15:29,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:15:29,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:15:29,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:29,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:15:29,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:29,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:15:29,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:30,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-04-05 06:15:30,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:30,239 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-05 06:15:30,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:15:30,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972058331] [2022-04-05 06:15:30,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972058331] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:15:30,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980112964] [2022-04-05 06:15:30,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 06:15:30,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:15:30,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:15:30,241 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:15:30,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-04-05 06:15:30,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 06:15:30,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:15:30,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 51 conjunts are in the unsatisfiable core [2022-04-05 06:15:30,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:15:30,651 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-05 06:15:30,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:15:30,851 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-05 06:15:30,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980112964] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:15:30,851 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:15:30,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 37 [2022-04-05 06:15:30,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429560218] [2022-04-05 06:15:30,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:15:30,852 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-04-05 06:15:30,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:15:30,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-04-05 06:15:30,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1247, Unknown=0, NotChecked=0, Total=1332 [2022-04-05 06:15:30,852 INFO L87 Difference]: Start difference. First operand 398 states and 454 transitions. Second operand has 37 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 31 states have internal predecessors, (49), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:15:32,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:15:32,230 INFO L93 Difference]: Finished difference Result 404 states and 459 transitions. [2022-04-05 06:15:32,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-05 06:15:32,230 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 31 states have internal predecessors, (49), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2022-04-05 06:15:32,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:15:32,231 INFO L225 Difference]: With dead ends: 404 [2022-04-05 06:15:32,231 INFO L226 Difference]: Without dead ends: 382 [2022-04-05 06:15:32,233 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 86 SyntacticMatches, 9 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=231, Invalid=3801, Unknown=0, NotChecked=0, Total=4032 [2022-04-05 06:15:32,233 INFO L913 BasicCegarLoop]: 74 mSDtfsCounter, 127 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 3209 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 3241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 3209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-05 06:15:32,234 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 221 Invalid, 3241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 3209 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-05 06:15:32,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2022-04-05 06:15:32,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 382. [2022-04-05 06:15:32,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 328 states have (on average 1.1646341463414633) internal successors, (382), 358 states have internal predecessors, (382), 20 states have call successors, (20), 5 states have call predecessors, (20), 33 states have return successors, (34), 18 states have call predecessors, (34), 18 states have call successors, (34) [2022-04-05 06:15:32,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 436 transitions. [2022-04-05 06:15:32,314 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 436 transitions. Word has length 49 [2022-04-05 06:15:32,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:15:32,315 INFO L478 AbstractCegarLoop]: Abstraction has 382 states and 436 transitions. [2022-04-05 06:15:32,315 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 31 states have internal predecessors, (49), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:15:32,315 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 436 transitions. [2022-04-05 06:15:32,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-05 06:15:32,317 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:15:32,317 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:15:32,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-04-05 06:15:32,517 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:15:32,517 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:15:32,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:15:32,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1245370818, now seen corresponding path program 45 times [2022-04-05 06:15:32,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:15:32,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604399610] [2022-04-05 06:15:32,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:15:32,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:15:32,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:32,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:15:32,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:32,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:15:32,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:32,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-04-05 06:15:32,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:32,834 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 06:15:32,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:15:32,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604399610] [2022-04-05 06:15:32,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604399610] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:15:32,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474303861] [2022-04-05 06:15:32,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 06:15:32,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:15:32,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:15:32,836 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:15:32,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-04-05 06:15:32,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-04-05 06:15:32,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:15:32,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-05 06:15:32,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:15:33,274 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 06:15:33,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:15:33,469 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 06:15:33,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474303861] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:15:33,470 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:15:33,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 37 [2022-04-05 06:15:33,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347655268] [2022-04-05 06:15:33,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:15:33,470 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-04-05 06:15:33,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:15:33,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-04-05 06:15:33,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1243, Unknown=0, NotChecked=0, Total=1332 [2022-04-05 06:15:33,473 INFO L87 Difference]: Start difference. First operand 382 states and 436 transitions. Second operand has 37 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 31 states have internal predecessors, (49), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:15:34,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:15:34,500 INFO L93 Difference]: Finished difference Result 388 states and 441 transitions. [2022-04-05 06:15:34,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-05 06:15:34,500 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 31 states have internal predecessors, (49), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2022-04-05 06:15:34,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:15:34,502 INFO L225 Difference]: With dead ends: 388 [2022-04-05 06:15:34,502 INFO L226 Difference]: Without dead ends: 364 [2022-04-05 06:15:34,503 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 84 SyntacticMatches, 9 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=233, Invalid=3549, Unknown=0, NotChecked=0, Total=3782 [2022-04-05 06:15:34,503 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 90 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 2194 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 2226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 2194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-05 06:15:34,504 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 191 Invalid, 2226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 2194 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-05 06:15:34,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-04-05 06:15:34,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 364. [2022-04-05 06:15:34,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 313 states have (on average 1.1661341853035143) internal successors, (365), 341 states have internal predecessors, (365), 19 states have call successors, (19), 5 states have call predecessors, (19), 31 states have return successors, (32), 17 states have call predecessors, (32), 17 states have call successors, (32) [2022-04-05 06:15:34,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 416 transitions. [2022-04-05 06:15:34,567 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 416 transitions. Word has length 49 [2022-04-05 06:15:34,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:15:34,567 INFO L478 AbstractCegarLoop]: Abstraction has 364 states and 416 transitions. [2022-04-05 06:15:34,567 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 31 states have internal predecessors, (49), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:15:34,568 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 416 transitions. [2022-04-05 06:15:34,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-05 06:15:34,569 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:15:34,569 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:15:34,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-04-05 06:15:34,770 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-04-05 06:15:34,770 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:15:34,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:15:34,770 INFO L85 PathProgramCache]: Analyzing trace with hash 623868167, now seen corresponding path program 46 times [2022-04-05 06:15:34,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:15:34,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482239998] [2022-04-05 06:15:34,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:15:34,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:15:34,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:34,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:15:34,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:34,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:15:34,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:34,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-04-05 06:15:34,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:35,062 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-05 06:15:35,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:15:35,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482239998] [2022-04-05 06:15:35,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482239998] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:15:35,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371396360] [2022-04-05 06:15:35,063 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 06:15:35,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:15:35,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:15:35,064 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:15:35,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-04-05 06:15:35,121 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 06:15:35,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:15:35,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 43 conjunts are in the unsatisfiable core [2022-04-05 06:15:35,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:15:35,533 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-05 06:15:35,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:15:35,721 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-05 06:15:35,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371396360] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:15:35,721 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:15:35,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 37 [2022-04-05 06:15:35,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163907901] [2022-04-05 06:15:35,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:15:35,722 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-04-05 06:15:35,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:15:35,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-04-05 06:15:35,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1239, Unknown=0, NotChecked=0, Total=1332 [2022-04-05 06:15:35,722 INFO L87 Difference]: Start difference. First operand 364 states and 416 transitions. Second operand has 37 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 31 states have internal predecessors, (49), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:15:36,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:15:36,509 INFO L93 Difference]: Finished difference Result 382 states and 437 transitions. [2022-04-05 06:15:36,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-05 06:15:36,509 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 31 states have internal predecessors, (49), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2022-04-05 06:15:36,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:15:36,510 INFO L225 Difference]: With dead ends: 382 [2022-04-05 06:15:36,510 INFO L226 Difference]: Without dead ends: 376 [2022-04-05 06:15:36,512 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 82 SyntacticMatches, 9 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=235, Invalid=3305, Unknown=0, NotChecked=0, Total=3540 [2022-04-05 06:15:36,512 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 56 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 1267 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 1299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-05 06:15:36,512 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 156 Invalid, 1299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1267 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-05 06:15:36,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2022-04-05 06:15:36,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 374. [2022-04-05 06:15:36,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 320 states have (on average 1.16875) internal successors, (374), 350 states have internal predecessors, (374), 20 states have call successors, (20), 5 states have call predecessors, (20), 33 states have return successors, (35), 18 states have call predecessors, (35), 18 states have call successors, (35) [2022-04-05 06:15:36,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 429 transitions. [2022-04-05 06:15:36,576 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 429 transitions. Word has length 49 [2022-04-05 06:15:36,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:15:36,576 INFO L478 AbstractCegarLoop]: Abstraction has 374 states and 429 transitions. [2022-04-05 06:15:36,576 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 31 states have internal predecessors, (49), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:15:36,576 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 429 transitions. [2022-04-05 06:15:36,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-05 06:15:36,578 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:15:36,578 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:15:36,601 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-04-05 06:15:36,779 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:15:36,779 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:15:36,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:15:36,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1933296099, now seen corresponding path program 47 times [2022-04-05 06:15:36,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:15:36,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100954732] [2022-04-05 06:15:36,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:15:36,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:15:36,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:36,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:15:36,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:36,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:15:36,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:36,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-04-05 06:15:36,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:37,073 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:15:37,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:15:37,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100954732] [2022-04-05 06:15:37,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100954732] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:15:37,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755321888] [2022-04-05 06:15:37,073 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 06:15:37,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:15:37,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:15:37,074 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:15:37,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-04-05 06:15:37,135 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-04-05 06:15:37,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:15:37,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-05 06:15:37,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:15:37,676 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:15:37,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:15:38,334 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:15:38,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755321888] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:15:38,335 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:15:38,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 21] total 55 [2022-04-05 06:15:38,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940519734] [2022-04-05 06:15:38,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:15:38,335 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-04-05 06:15:38,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:15:38,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-04-05 06:15:38,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=2790, Unknown=0, NotChecked=0, Total=2970 [2022-04-05 06:15:38,336 INFO L87 Difference]: Start difference. First operand 374 states and 429 transitions. Second operand has 55 states, 55 states have (on average 1.6) internal successors, (88), 54 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:15:41,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:15:41,000 INFO L93 Difference]: Finished difference Result 442 states and 510 transitions. [2022-04-05 06:15:41,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-04-05 06:15:41,001 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.6) internal successors, (88), 54 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 50 [2022-04-05 06:15:41,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:15:41,004 INFO L225 Difference]: With dead ends: 442 [2022-04-05 06:15:41,004 INFO L226 Difference]: Without dead ends: 428 [2022-04-05 06:15:41,007 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=546, Invalid=6936, Unknown=0, NotChecked=0, Total=7482 [2022-04-05 06:15:41,007 INFO L913 BasicCegarLoop]: 94 mSDtfsCounter, 843 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 3795 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 848 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 3895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 3795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-05 06:15:41,007 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [848 Valid, 236 Invalid, 3895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 3795 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-05 06:15:41,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2022-04-05 06:15:41,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 419. [2022-04-05 06:15:41,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 359 states have (on average 1.1671309192200556) internal successors, (419), 393 states have internal predecessors, (419), 22 states have call successors, (22), 5 states have call predecessors, (22), 37 states have return successors, (41), 20 states have call predecessors, (41), 20 states have call successors, (41) [2022-04-05 06:15:41,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 482 transitions. [2022-04-05 06:15:41,096 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 482 transitions. Word has length 50 [2022-04-05 06:15:41,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:15:41,096 INFO L478 AbstractCegarLoop]: Abstraction has 419 states and 482 transitions. [2022-04-05 06:15:41,096 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.6) internal successors, (88), 54 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:15:41,096 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 482 transitions. [2022-04-05 06:15:41,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-05 06:15:41,098 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:15:41,099 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:15:41,115 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-04-05 06:15:41,304 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:15:41,305 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:15:41,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:15:41,305 INFO L85 PathProgramCache]: Analyzing trace with hash 30934931, now seen corresponding path program 48 times [2022-04-05 06:15:41,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:15:41,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790738907] [2022-04-05 06:15:41,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:15:41,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:15:41,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:41,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:15:41,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:41,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:15:41,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:41,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-04-05 06:15:41,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:41,613 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:15:41,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:15:41,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790738907] [2022-04-05 06:15:41,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790738907] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:15:41,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068999845] [2022-04-05 06:15:41,614 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-05 06:15:41,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:15:41,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:15:41,614 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:15:41,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-04-05 06:15:41,675 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-05 06:15:41,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:15:41,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-05 06:15:41,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:15:42,155 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:15:42,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:15:42,819 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:15:42,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068999845] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:15:42,820 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:15:42,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 21] total 55 [2022-04-05 06:15:42,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177785581] [2022-04-05 06:15:42,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:15:42,820 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-04-05 06:15:42,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:15:42,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-04-05 06:15:42,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=2790, Unknown=0, NotChecked=0, Total=2970 [2022-04-05 06:15:42,821 INFO L87 Difference]: Start difference. First operand 419 states and 482 transitions. Second operand has 55 states, 55 states have (on average 1.6) internal successors, (88), 54 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:15:45,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:15:45,282 INFO L93 Difference]: Finished difference Result 434 states and 497 transitions. [2022-04-05 06:15:45,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-04-05 06:15:45,283 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.6) internal successors, (88), 54 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 50 [2022-04-05 06:15:45,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:15:45,285 INFO L225 Difference]: With dead ends: 434 [2022-04-05 06:15:45,285 INFO L226 Difference]: Without dead ends: 422 [2022-04-05 06:15:45,287 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=546, Invalid=6936, Unknown=0, NotChecked=0, Total=7482 [2022-04-05 06:15:45,287 INFO L913 BasicCegarLoop]: 96 mSDtfsCounter, 872 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 3502 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 887 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 3589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 3502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-05 06:15:45,287 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [887 Valid, 228 Invalid, 3589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 3502 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-05 06:15:45,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2022-04-05 06:15:45,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 420. [2022-04-05 06:15:45,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 360 states have (on average 1.1666666666666667) internal successors, (420), 394 states have internal predecessors, (420), 22 states have call successors, (22), 5 states have call predecessors, (22), 37 states have return successors, (38), 20 states have call predecessors, (38), 20 states have call successors, (38) [2022-04-05 06:15:45,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 480 transitions. [2022-04-05 06:15:45,375 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 480 transitions. Word has length 50 [2022-04-05 06:15:45,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:15:45,376 INFO L478 AbstractCegarLoop]: Abstraction has 420 states and 480 transitions. [2022-04-05 06:15:45,376 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.6) internal successors, (88), 54 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:15:45,376 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 480 transitions. [2022-04-05 06:15:45,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-05 06:15:45,381 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:15:45,381 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:15:45,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-04-05 06:15:45,584 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-04-05 06:15:45,584 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:15:45,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:15:45,584 INFO L85 PathProgramCache]: Analyzing trace with hash 2075396918, now seen corresponding path program 49 times [2022-04-05 06:15:45,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:15:45,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280686049] [2022-04-05 06:15:45,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:15:45,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:15:45,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:45,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:15:45,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:45,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:15:45,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:45,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-04-05 06:15:45,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:45,676 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-04-05 06:15:45,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:15:45,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280686049] [2022-04-05 06:15:45,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280686049] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:15:45,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399318191] [2022-04-05 06:15:45,676 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-05 06:15:45,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:15:45,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:15:45,677 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:15:45,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-04-05 06:15:45,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:45,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-05 06:15:45,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:15:45,835 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-04-05 06:15:45,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:15:45,898 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-04-05 06:15:45,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399318191] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:15:45,898 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:15:45,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 18 [2022-04-05 06:15:45,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651096504] [2022-04-05 06:15:45,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:15:45,899 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-05 06:15:45,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:15:45,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-05 06:15:45,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2022-04-05 06:15:45,899 INFO L87 Difference]: Start difference. First operand 420 states and 480 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-05 06:15:46,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:15:46,302 INFO L93 Difference]: Finished difference Result 540 states and 625 transitions. [2022-04-05 06:15:46,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-05 06:15:46,303 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2022-04-05 06:15:46,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:15:46,304 INFO L225 Difference]: With dead ends: 540 [2022-04-05 06:15:46,304 INFO L226 Difference]: Without dead ends: 502 [2022-04-05 06:15:46,307 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=372, Invalid=1034, Unknown=0, NotChecked=0, Total=1406 [2022-04-05 06:15:46,307 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 110 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 06:15:46,307 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 81 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 06:15:46,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2022-04-05 06:15:46,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 478. [2022-04-05 06:15:46,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 418 states have (on average 1.1650717703349283) internal successors, (487), 452 states have internal predecessors, (487), 22 states have call successors, (22), 5 states have call predecessors, (22), 37 states have return successors, (38), 20 states have call predecessors, (38), 20 states have call successors, (38) [2022-04-05 06:15:46,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 547 transitions. [2022-04-05 06:15:46,407 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 547 transitions. Word has length 50 [2022-04-05 06:15:46,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:15:46,407 INFO L478 AbstractCegarLoop]: Abstraction has 478 states and 547 transitions. [2022-04-05 06:15:46,407 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-05 06:15:46,407 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 547 transitions. [2022-04-05 06:15:46,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-05 06:15:46,409 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:15:46,409 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:15:46,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-04-05 06:15:46,610 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-04-05 06:15:46,610 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:15:46,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:15:46,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1468811041, now seen corresponding path program 50 times [2022-04-05 06:15:46,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:15:46,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414250748] [2022-04-05 06:15:46,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:15:46,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:15:46,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:46,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:15:46,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:46,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:15:46,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:46,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-04-05 06:15:46,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:46,676 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-04-05 06:15:46,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:15:46,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414250748] [2022-04-05 06:15:46,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414250748] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:15:46,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839810707] [2022-04-05 06:15:46,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 06:15:46,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:15:46,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:15:46,677 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:15:46,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-04-05 06:15:46,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 06:15:46,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:15:46,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-05 06:15:46,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:15:46,839 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-04-05 06:15:46,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:15:46,898 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-04-05 06:15:46,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839810707] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:15:46,898 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:15:46,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 18 [2022-04-05 06:15:46,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106527204] [2022-04-05 06:15:46,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:15:46,899 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-05 06:15:46,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:15:46,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-05 06:15:46,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2022-04-05 06:15:46,899 INFO L87 Difference]: Start difference. First operand 478 states and 547 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:15:47,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:15:47,338 INFO L93 Difference]: Finished difference Result 857 states and 980 transitions. [2022-04-05 06:15:47,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-05 06:15:47,338 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 50 [2022-04-05 06:15:47,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:15:47,342 INFO L225 Difference]: With dead ends: 857 [2022-04-05 06:15:47,342 INFO L226 Difference]: Without dead ends: 560 [2022-04-05 06:15:47,344 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=372, Invalid=1034, Unknown=0, NotChecked=0, Total=1406 [2022-04-05 06:15:47,344 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 112 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 06:15:47,344 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 81 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 06:15:47,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2022-04-05 06:15:47,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 536. [2022-04-05 06:15:47,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 476 states have (on average 1.1638655462184875) internal successors, (554), 510 states have internal predecessors, (554), 22 states have call successors, (22), 5 states have call predecessors, (22), 37 states have return successors, (38), 20 states have call predecessors, (38), 20 states have call successors, (38) [2022-04-05 06:15:47,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 614 transitions. [2022-04-05 06:15:47,473 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 614 transitions. Word has length 50 [2022-04-05 06:15:47,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:15:47,473 INFO L478 AbstractCegarLoop]: Abstraction has 536 states and 614 transitions. [2022-04-05 06:15:47,473 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:15:47,473 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 614 transitions. [2022-04-05 06:15:47,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-05 06:15:47,475 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:15:47,475 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:15:47,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-04-05 06:15:47,692 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-04-05 06:15:47,692 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:15:47,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:15:47,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1466609972, now seen corresponding path program 51 times [2022-04-05 06:15:47,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:15:47,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936731692] [2022-04-05 06:15:47,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:15:47,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:15:47,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:47,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:15:47,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:47,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:15:47,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:47,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-04-05 06:15:47,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:48,109 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 06:15:48,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:15:48,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936731692] [2022-04-05 06:15:48,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936731692] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:15:48,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367608937] [2022-04-05 06:15:48,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 06:15:48,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:15:48,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:15:48,111 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:15:48,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-04-05 06:15:48,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-04-05 06:15:48,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:15:48,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 59 conjunts are in the unsatisfiable core [2022-04-05 06:15:48,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:15:48,472 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 06:15:48,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:15:48,662 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 06:15:48,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367608937] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:15:48,662 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:15:48,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 39 [2022-04-05 06:15:48,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626750194] [2022-04-05 06:15:48,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:15:48,663 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-04-05 06:15:48,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:15:48,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-04-05 06:15:48,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1397, Unknown=0, NotChecked=0, Total=1482 [2022-04-05 06:15:48,663 INFO L87 Difference]: Start difference. First operand 536 states and 614 transitions. Second operand has 39 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 33 states have internal predecessors, (51), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:15:50,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:15:50,673 INFO L93 Difference]: Finished difference Result 628 states and 719 transitions. [2022-04-05 06:15:50,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-05 06:15:50,675 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 33 states have internal predecessors, (51), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 51 [2022-04-05 06:15:50,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:15:50,678 INFO L225 Difference]: With dead ends: 628 [2022-04-05 06:15:50,678 INFO L226 Difference]: Without dead ends: 622 [2022-04-05 06:15:50,680 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 96 SyntacticMatches, 5 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=241, Invalid=4589, Unknown=0, NotChecked=0, Total=4830 [2022-04-05 06:15:50,680 INFO L913 BasicCegarLoop]: 98 mSDtfsCounter, 211 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 5210 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 5258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 5210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-05 06:15:50,680 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 275 Invalid, 5258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 5210 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-05 06:15:50,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2022-04-05 06:15:50,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 552. [2022-04-05 06:15:50,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 489 states have (on average 1.16359918200409) internal successors, (569), 525 states have internal predecessors, (569), 23 states have call successors, (23), 5 states have call predecessors, (23), 39 states have return successors, (41), 21 states have call predecessors, (41), 21 states have call successors, (41) [2022-04-05 06:15:50,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 633 transitions. [2022-04-05 06:15:50,814 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 633 transitions. Word has length 51 [2022-04-05 06:15:50,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:15:50,815 INFO L478 AbstractCegarLoop]: Abstraction has 552 states and 633 transitions. [2022-04-05 06:15:50,815 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 33 states have internal predecessors, (51), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:15:50,815 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 633 transitions. [2022-04-05 06:15:50,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-05 06:15:50,817 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:15:50,817 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:15:50,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-04-05 06:15:51,018 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:15:51,018 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:15:51,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:15:51,018 INFO L85 PathProgramCache]: Analyzing trace with hash 2017377143, now seen corresponding path program 52 times [2022-04-05 06:15:51,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:15:51,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980300076] [2022-04-05 06:15:51,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:15:51,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:15:51,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:51,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:15:51,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:51,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:15:51,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:51,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-04-05 06:15:51,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:51,428 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-05 06:15:51,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:15:51,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980300076] [2022-04-05 06:15:51,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980300076] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:15:51,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188337302] [2022-04-05 06:15:51,428 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 06:15:51,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:15:51,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:15:51,429 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:15:51,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-04-05 06:15:51,491 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 06:15:51,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:15:51,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-05 06:15:51,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:15:51,860 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-05 06:15:51,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:15:52,069 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-05 06:15:52,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188337302] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:15:52,069 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:15:52,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 39 [2022-04-05 06:15:52,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323054471] [2022-04-05 06:15:52,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:15:52,070 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-04-05 06:15:52,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:15:52,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-04-05 06:15:52,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1393, Unknown=0, NotChecked=0, Total=1482 [2022-04-05 06:15:52,070 INFO L87 Difference]: Start difference. First operand 552 states and 633 transitions. Second operand has 39 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 33 states have internal predecessors, (51), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:15:53,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:15:53,635 INFO L93 Difference]: Finished difference Result 558 states and 638 transitions. [2022-04-05 06:15:53,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-05 06:15:53,635 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 33 states have internal predecessors, (51), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 51 [2022-04-05 06:15:53,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:15:53,637 INFO L225 Difference]: With dead ends: 558 [2022-04-05 06:15:53,637 INFO L226 Difference]: Without dead ends: 536 [2022-04-05 06:15:53,639 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 90 SyntacticMatches, 9 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=243, Invalid=4313, Unknown=0, NotChecked=0, Total=4556 [2022-04-05 06:15:53,639 INFO L913 BasicCegarLoop]: 78 mSDtfsCounter, 150 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 3702 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 3738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 3702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-05 06:15:53,639 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 235 Invalid, 3738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 3702 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-05 06:15:53,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2022-04-05 06:15:53,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 536. [2022-04-05 06:15:53,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 476 states have (on average 1.1638655462184875) internal successors, (554), 510 states have internal predecessors, (554), 22 states have call successors, (22), 5 states have call predecessors, (22), 37 states have return successors, (39), 20 states have call predecessors, (39), 20 states have call successors, (39) [2022-04-05 06:15:53,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 615 transitions. [2022-04-05 06:15:53,765 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 615 transitions. Word has length 51 [2022-04-05 06:15:53,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:15:53,766 INFO L478 AbstractCegarLoop]: Abstraction has 536 states and 615 transitions. [2022-04-05 06:15:53,766 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 33 states have internal predecessors, (51), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:15:53,766 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 615 transitions. [2022-04-05 06:15:53,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-05 06:15:53,768 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:15:53,768 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:15:53,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-04-05 06:15:53,984 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2022-04-05 06:15:53,984 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:15:53,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:15:53,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1775857708, now seen corresponding path program 53 times [2022-04-05 06:15:53,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:15:53,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061435490] [2022-04-05 06:15:53,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:15:53,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:15:53,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:54,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:15:54,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:54,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:15:54,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:54,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-04-05 06:15:54,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:54,357 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 06:15:54,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:15:54,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061435490] [2022-04-05 06:15:54,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061435490] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:15:54,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708842212] [2022-04-05 06:15:54,358 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 06:15:54,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:15:54,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:15:54,359 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:15:54,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-04-05 06:15:54,423 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-04-05 06:15:54,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:15:54,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 51 conjunts are in the unsatisfiable core [2022-04-05 06:15:54,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:15:54,823 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 06:15:54,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:15:55,028 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 06:15:55,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708842212] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:15:55,028 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:15:55,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 39 [2022-04-05 06:15:55,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933932171] [2022-04-05 06:15:55,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:15:55,029 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-04-05 06:15:55,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:15:55,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-04-05 06:15:55,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1389, Unknown=0, NotChecked=0, Total=1482 [2022-04-05 06:15:55,029 INFO L87 Difference]: Start difference. First operand 536 states and 615 transitions. Second operand has 39 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 33 states have internal predecessors, (51), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:15:56,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:15:56,250 INFO L93 Difference]: Finished difference Result 542 states and 620 transitions. [2022-04-05 06:15:56,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-05 06:15:56,250 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 33 states have internal predecessors, (51), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 51 [2022-04-05 06:15:56,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:15:56,252 INFO L225 Difference]: With dead ends: 542 [2022-04-05 06:15:56,252 INFO L226 Difference]: Without dead ends: 518 [2022-04-05 06:15:56,254 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 88 SyntacticMatches, 9 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=245, Invalid=4045, Unknown=0, NotChecked=0, Total=4290 [2022-04-05 06:15:56,254 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 115 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 2535 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 2571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 2535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-05 06:15:56,254 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 200 Invalid, 2571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 2535 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-05 06:15:56,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2022-04-05 06:15:56,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 518. [2022-04-05 06:15:56,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 461 states have (on average 1.1648590021691974) internal successors, (537), 493 states have internal predecessors, (537), 21 states have call successors, (21), 5 states have call predecessors, (21), 35 states have return successors, (37), 19 states have call predecessors, (37), 19 states have call successors, (37) [2022-04-05 06:15:56,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 595 transitions. [2022-04-05 06:15:56,369 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 595 transitions. Word has length 51 [2022-04-05 06:15:56,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:15:56,369 INFO L478 AbstractCegarLoop]: Abstraction has 518 states and 595 transitions. [2022-04-05 06:15:56,369 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 33 states have internal predecessors, (51), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:15:56,369 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 595 transitions. [2022-04-05 06:15:56,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-05 06:15:56,371 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:15:56,371 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:15:56,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-04-05 06:15:56,587 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:15:56,587 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:15:56,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:15:56,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1844811183, now seen corresponding path program 54 times [2022-04-05 06:15:56,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:15:56,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724132953] [2022-04-05 06:15:56,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:15:56,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:15:56,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:56,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:15:56,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:56,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:15:56,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:56,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-04-05 06:15:56,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:56,801 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-04-05 06:15:56,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:15:56,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724132953] [2022-04-05 06:15:56,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724132953] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:15:56,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246077305] [2022-04-05 06:15:56,802 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-05 06:15:56,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:15:56,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:15:56,802 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:15:56,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-04-05 06:15:56,873 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-05 06:15:56,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:15:56,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-05 06:15:56,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:15:57,180 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-04-05 06:15:57,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:15:57,556 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-04-05 06:15:57,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246077305] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:15:57,557 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:15:57,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15, 15] total 39 [2022-04-05 06:15:57,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018752635] [2022-04-05 06:15:57,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:15:57,557 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-04-05 06:15:57,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:15:57,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-04-05 06:15:57,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1348, Unknown=0, NotChecked=0, Total=1482 [2022-04-05 06:15:57,558 INFO L87 Difference]: Start difference. First operand 518 states and 595 transitions. Second operand has 39 states, 39 states have (on average 1.641025641025641) internal successors, (64), 38 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:15:58,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:15:58,776 INFO L93 Difference]: Finished difference Result 590 states and 681 transitions. [2022-04-05 06:15:58,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-05 06:15:58,776 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.641025641025641) internal successors, (64), 38 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2022-04-05 06:15:58,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:15:58,780 INFO L225 Difference]: With dead ends: 590 [2022-04-05 06:15:58,780 INFO L226 Difference]: Without dead ends: 573 [2022-04-05 06:15:58,782 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 81 SyntacticMatches, 5 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=325, Invalid=3097, Unknown=0, NotChecked=0, Total=3422 [2022-04-05 06:15:58,782 INFO L913 BasicCegarLoop]: 71 mSDtfsCounter, 496 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1787 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 500 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 1841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-05 06:15:58,782 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [500 Valid, 163 Invalid, 1841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1787 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-05 06:15:58,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2022-04-05 06:15:58,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 568. [2022-04-05 06:15:58,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 490 states have (on average 1.153061224489796) internal successors, (565), 536 states have internal predecessors, (565), 28 states have call successors, (28), 5 states have call predecessors, (28), 49 states have return successors, (58), 26 states have call predecessors, (58), 26 states have call successors, (58) [2022-04-05 06:15:58,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 651 transitions. [2022-04-05 06:15:58,921 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 651 transitions. Word has length 51 [2022-04-05 06:15:58,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:15:58,921 INFO L478 AbstractCegarLoop]: Abstraction has 568 states and 651 transitions. [2022-04-05 06:15:58,921 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.641025641025641) internal successors, (64), 38 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:15:58,921 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 651 transitions. [2022-04-05 06:15:58,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-05 06:15:58,924 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:15:58,924 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:15:58,940 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-04-05 06:15:59,124 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:15:59,124 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:15:59,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:15:59,125 INFO L85 PathProgramCache]: Analyzing trace with hash -58898921, now seen corresponding path program 55 times [2022-04-05 06:15:59,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:15:59,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140783490] [2022-04-05 06:15:59,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:15:59,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:15:59,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:59,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:15:59,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:59,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:15:59,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:59,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-04-05 06:15:59,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:59,438 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-05 06:15:59,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:15:59,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140783490] [2022-04-05 06:15:59,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140783490] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:15:59,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748527234] [2022-04-05 06:15:59,438 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-05 06:15:59,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:15:59,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:15:59,439 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:15:59,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-04-05 06:15:59,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:15:59,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-05 06:15:59,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:15:59,937 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-05 06:15:59,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:16:00,145 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-05 06:16:00,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748527234] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:16:00,146 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:16:00,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 39 [2022-04-05 06:16:00,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505406491] [2022-04-05 06:16:00,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:16:00,146 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-04-05 06:16:00,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:16:00,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-04-05 06:16:00,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1385, Unknown=0, NotChecked=0, Total=1482 [2022-04-05 06:16:00,147 INFO L87 Difference]: Start difference. First operand 568 states and 651 transitions. Second operand has 39 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 33 states have internal predecessors, (51), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:16:01,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:16:01,197 INFO L93 Difference]: Finished difference Result 586 states and 673 transitions. [2022-04-05 06:16:01,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-05 06:16:01,197 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 33 states have internal predecessors, (51), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 51 [2022-04-05 06:16:01,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:16:01,200 INFO L225 Difference]: With dead ends: 586 [2022-04-05 06:16:01,200 INFO L226 Difference]: Without dead ends: 569 [2022-04-05 06:16:01,202 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 86 SyntacticMatches, 9 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=247, Invalid=3785, Unknown=0, NotChecked=0, Total=4032 [2022-04-05 06:16:01,203 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 77 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 1952 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 1986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-05 06:16:01,203 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 193 Invalid, 1986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1952 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-05 06:16:01,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2022-04-05 06:16:01,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 564. [2022-04-05 06:16:01,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 486 states have (on average 1.1563786008230452) internal successors, (562), 532 states have internal predecessors, (562), 28 states have call successors, (28), 5 states have call predecessors, (28), 49 states have return successors, (58), 26 states have call predecessors, (58), 26 states have call successors, (58) [2022-04-05 06:16:01,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 648 transitions. [2022-04-05 06:16:01,333 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 648 transitions. Word has length 51 [2022-04-05 06:16:01,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:16:01,333 INFO L478 AbstractCegarLoop]: Abstraction has 564 states and 648 transitions. [2022-04-05 06:16:01,333 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 33 states have internal predecessors, (51), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:16:01,334 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 648 transitions. [2022-04-05 06:16:01,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-05 06:16:01,336 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:16:01,336 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:16:01,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-04-05 06:16:01,553 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:16:01,553 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:16:01,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:16:01,554 INFO L85 PathProgramCache]: Analyzing trace with hash -269481222, now seen corresponding path program 56 times [2022-04-05 06:16:01,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:16:01,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907709320] [2022-04-05 06:16:01,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:16:01,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:16:01,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:16:01,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:16:01,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:16:01,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:16:01,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:16:01,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-05 06:16:01,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:16:01,815 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-04-05 06:16:01,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:16:01,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907709320] [2022-04-05 06:16:01,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907709320] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:16:01,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857552222] [2022-04-05 06:16:01,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 06:16:01,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:16:01,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:16:01,826 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:16:01,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-04-05 06:16:01,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 06:16:01,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:16:01,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-05 06:16:01,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:16:02,192 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-04-05 06:16:02,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:16:02,588 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-04-05 06:16:02,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857552222] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:16:02,588 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:16:02,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15, 15] total 39 [2022-04-05 06:16:02,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650164241] [2022-04-05 06:16:02,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:16:02,589 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-04-05 06:16:02,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:16:02,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-04-05 06:16:02,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1348, Unknown=0, NotChecked=0, Total=1482 [2022-04-05 06:16:02,589 INFO L87 Difference]: Start difference. First operand 564 states and 648 transitions. Second operand has 39 states, 39 states have (on average 1.641025641025641) internal successors, (64), 38 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:16:03,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:16:03,889 INFO L93 Difference]: Finished difference Result 578 states and 661 transitions. [2022-04-05 06:16:03,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-05 06:16:03,889 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.641025641025641) internal successors, (64), 38 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2022-04-05 06:16:03,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:16:03,891 INFO L225 Difference]: With dead ends: 578 [2022-04-05 06:16:03,892 INFO L226 Difference]: Without dead ends: 554 [2022-04-05 06:16:03,893 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 80 SyntacticMatches, 6 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=325, Invalid=3097, Unknown=0, NotChecked=0, Total=3422 [2022-04-05 06:16:03,894 INFO L913 BasicCegarLoop]: 69 mSDtfsCounter, 388 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 2011 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 2051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 2011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-05 06:16:03,894 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [397 Valid, 176 Invalid, 2051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 2011 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-05 06:16:03,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2022-04-05 06:16:04,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 552. [2022-04-05 06:16:04,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 474 states have (on average 1.1561181434599157) internal successors, (548), 520 states have internal predecessors, (548), 28 states have call successors, (28), 5 states have call predecessors, (28), 49 states have return successors, (52), 26 states have call predecessors, (52), 26 states have call successors, (52) [2022-04-05 06:16:04,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 628 transitions. [2022-04-05 06:16:04,015 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 628 transitions. Word has length 51 [2022-04-05 06:16:04,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:16:04,015 INFO L478 AbstractCegarLoop]: Abstraction has 552 states and 628 transitions. [2022-04-05 06:16:04,015 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.641025641025641) internal successors, (64), 38 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:16:04,015 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 628 transitions. [2022-04-05 06:16:04,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-05 06:16:04,018 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:16:04,018 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:16:04,034 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-04-05 06:16:04,218 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:16:04,219 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:16:04,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:16:04,219 INFO L85 PathProgramCache]: Analyzing trace with hash -645861709, now seen corresponding path program 57 times [2022-04-05 06:16:04,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:16:04,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500176044] [2022-04-05 06:16:04,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:16:04,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:16:04,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:16:04,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:16:04,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:16:04,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:16:04,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:16:04,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-04-05 06:16:04,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:16:04,575 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:16:04,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:16:04,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500176044] [2022-04-05 06:16:04,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500176044] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:16:04,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228539916] [2022-04-05 06:16:04,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 06:16:04,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:16:04,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:16:04,576 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:16:04,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-04-05 06:16:04,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-04-05 06:16:04,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:16:04,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-05 06:16:04,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:16:05,217 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:16:05,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:16:06,044 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:16:06,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228539916] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:16:06,044 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:16:06,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23, 23] total 61 [2022-04-05 06:16:06,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116922165] [2022-04-05 06:16:06,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:16:06,044 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-04-05 06:16:06,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:16:06,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-04-05 06:16:06,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=3459, Unknown=0, NotChecked=0, Total=3660 [2022-04-05 06:16:06,045 INFO L87 Difference]: Start difference. First operand 552 states and 628 transitions. Second operand has 61 states, 61 states have (on average 1.540983606557377) internal successors, (94), 60 states have internal predecessors, (94), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:16:09,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:16:09,316 INFO L93 Difference]: Finished difference Result 642 states and 735 transitions. [2022-04-05 06:16:09,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-04-05 06:16:09,316 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.540983606557377) internal successors, (94), 60 states have internal predecessors, (94), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 52 [2022-04-05 06:16:09,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:16:09,320 INFO L225 Difference]: With dead ends: 642 [2022-04-05 06:16:09,320 INFO L226 Difference]: Without dead ends: 628 [2022-04-05 06:16:09,322 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1307 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=640, Invalid=8672, Unknown=0, NotChecked=0, Total=9312 [2022-04-05 06:16:09,322 INFO L913 BasicCegarLoop]: 104 mSDtfsCounter, 1094 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 3995 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1099 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 4116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 3995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-04-05 06:16:09,322 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1099 Valid, 246 Invalid, 4116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 3995 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-04-05 06:16:09,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2022-04-05 06:16:09,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 619. [2022-04-05 06:16:09,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 532 states have (on average 1.1541353383458646) internal successors, (614), 584 states have internal predecessors, (614), 31 states have call successors, (31), 5 states have call predecessors, (31), 55 states have return successors, (61), 29 states have call predecessors, (61), 29 states have call successors, (61) [2022-04-05 06:16:09,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 706 transitions. [2022-04-05 06:16:09,499 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 706 transitions. Word has length 52 [2022-04-05 06:16:09,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:16:09,499 INFO L478 AbstractCegarLoop]: Abstraction has 619 states and 706 transitions. [2022-04-05 06:16:09,499 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.540983606557377) internal successors, (94), 60 states have internal predecessors, (94), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:16:09,499 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 706 transitions. [2022-04-05 06:16:09,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-05 06:16:09,502 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:16:09,502 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:16:09,518 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-04-05 06:16:09,711 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-04-05 06:16:09,711 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:16:09,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:16:09,711 INFO L85 PathProgramCache]: Analyzing trace with hash 115758077, now seen corresponding path program 58 times [2022-04-05 06:16:09,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:16:09,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755898613] [2022-04-05 06:16:09,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:16:09,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:16:09,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:16:09,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:16:09,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:16:09,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:16:09,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:16:09,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-05 06:16:09,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:16:10,030 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:16:10,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:16:10,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755898613] [2022-04-05 06:16:10,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755898613] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:16:10,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213309593] [2022-04-05 06:16:10,030 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 06:16:10,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:16:10,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:16:10,031 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:16:10,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-04-05 06:16:10,101 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 06:16:10,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:16:10,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-05 06:16:10,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:16:10,729 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:16:10,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:16:11,612 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:16:11,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213309593] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:16:11,613 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:16:11,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23, 23] total 61 [2022-04-05 06:16:11,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952240515] [2022-04-05 06:16:11,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:16:11,613 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-04-05 06:16:11,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:16:11,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-04-05 06:16:11,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=3459, Unknown=0, NotChecked=0, Total=3660 [2022-04-05 06:16:11,614 INFO L87 Difference]: Start difference. First operand 619 states and 706 transitions. Second operand has 61 states, 61 states have (on average 1.540983606557377) internal successors, (94), 60 states have internal predecessors, (94), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:16:15,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:16:15,282 INFO L93 Difference]: Finished difference Result 634 states and 721 transitions. [2022-04-05 06:16:15,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-04-05 06:16:15,283 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.540983606557377) internal successors, (94), 60 states have internal predecessors, (94), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 52 [2022-04-05 06:16:15,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:16:15,286 INFO L225 Difference]: With dead ends: 634 [2022-04-05 06:16:15,286 INFO L226 Difference]: Without dead ends: 622 [2022-04-05 06:16:15,288 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1319 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=640, Invalid=8672, Unknown=0, NotChecked=0, Total=9312 [2022-04-05 06:16:15,289 INFO L913 BasicCegarLoop]: 106 mSDtfsCounter, 1040 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 5029 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1057 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 5135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 5029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-04-05 06:16:15,289 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1057 Valid, 278 Invalid, 5135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 5029 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-04-05 06:16:15,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2022-04-05 06:16:15,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 620. [2022-04-05 06:16:15,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 533 states have (on average 1.1538461538461537) internal successors, (615), 585 states have internal predecessors, (615), 31 states have call successors, (31), 5 states have call predecessors, (31), 55 states have return successors, (57), 29 states have call predecessors, (57), 29 states have call successors, (57) [2022-04-05 06:16:15,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 703 transitions. [2022-04-05 06:16:15,484 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 703 transitions. Word has length 52 [2022-04-05 06:16:15,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:16:15,485 INFO L478 AbstractCegarLoop]: Abstraction has 620 states and 703 transitions. [2022-04-05 06:16:15,485 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.540983606557377) internal successors, (94), 60 states have internal predecessors, (94), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:16:15,485 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 703 transitions. [2022-04-05 06:16:15,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-05 06:16:15,490 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:16:15,490 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:16:15,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-04-05 06:16:15,713 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-04-05 06:16:15,713 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:16:15,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:16:15,713 INFO L85 PathProgramCache]: Analyzing trace with hash -502641418, now seen corresponding path program 59 times [2022-04-05 06:16:15,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:16:15,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348821963] [2022-04-05 06:16:15,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:16:15,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:16:15,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:16:15,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:16:15,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:16:15,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:16:15,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:16:15,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-04-05 06:16:15,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:16:15,796 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-04-05 06:16:15,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:16:15,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348821963] [2022-04-05 06:16:15,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348821963] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:16:15,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597377545] [2022-04-05 06:16:15,797 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 06:16:15,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:16:15,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:16:15,816 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:16:15,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-04-05 06:16:15,894 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-04-05 06:16:15,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:16:15,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-05 06:16:15,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:16:16,004 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-04-05 06:16:16,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:16:16,072 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-04-05 06:16:16,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597377545] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:16:16,073 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:16:16,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 19 [2022-04-05 06:16:16,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436298342] [2022-04-05 06:16:16,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:16:16,073 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-05 06:16:16,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:16:16,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-05 06:16:16,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2022-04-05 06:16:16,074 INFO L87 Difference]: Start difference. First operand 620 states and 703 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:16:16,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:16:16,615 INFO L93 Difference]: Finished difference Result 944 states and 1054 transitions. [2022-04-05 06:16:16,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-05 06:16:16,615 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 52 [2022-04-05 06:16:16,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:16:16,619 INFO L225 Difference]: With dead ends: 944 [2022-04-05 06:16:16,619 INFO L226 Difference]: Without dead ends: 617 [2022-04-05 06:16:16,622 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=494, Invalid=1066, Unknown=0, NotChecked=0, Total=1560 [2022-04-05 06:16:16,622 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 78 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 06:16:16,622 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 80 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 06:16:16,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2022-04-05 06:16:16,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 609. [2022-04-05 06:16:16,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 609 states, 528 states have (on average 1.1477272727272727) internal successors, (606), 576 states have internal predecessors, (606), 29 states have call successors, (29), 5 states have call predecessors, (29), 51 states have return successors, (51), 27 states have call predecessors, (51), 27 states have call successors, (51) [2022-04-05 06:16:16,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 686 transitions. [2022-04-05 06:16:16,786 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 686 transitions. Word has length 52 [2022-04-05 06:16:16,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:16:16,786 INFO L478 AbstractCegarLoop]: Abstraction has 609 states and 686 transitions. [2022-04-05 06:16:16,786 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:16:16,786 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 686 transitions. [2022-04-05 06:16:16,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-05 06:16:16,789 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:16:16,789 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:16:16,813 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-04-05 06:16:16,990 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-04-05 06:16:16,990 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:16:16,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:16:16,990 INFO L85 PathProgramCache]: Analyzing trace with hash -753408037, now seen corresponding path program 60 times [2022-04-05 06:16:16,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:16:16,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624447838] [2022-04-05 06:16:16,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:16:16,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:16:16,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:16:17,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:16:17,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:16:17,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:16:17,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:16:17,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-05 06:16:17,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:16:17,069 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-04-05 06:16:17,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:16:17,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624447838] [2022-04-05 06:16:17,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624447838] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:16:17,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295465616] [2022-04-05 06:16:17,070 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-05 06:16:17,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:16:17,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:16:17,071 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:16:17,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-04-05 06:16:17,150 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-05 06:16:17,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:16:17,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-05 06:16:17,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:16:17,262 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-04-05 06:16:17,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:16:17,344 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-04-05 06:16:17,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295465616] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:16:17,345 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:16:17,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 19 [2022-04-05 06:16:17,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067904963] [2022-04-05 06:16:17,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:16:17,345 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-05 06:16:17,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:16:17,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-05 06:16:17,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2022-04-05 06:16:17,346 INFO L87 Difference]: Start difference. First operand 609 states and 686 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-05 06:16:17,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:16:17,882 INFO L93 Difference]: Finished difference Result 651 states and 736 transitions. [2022-04-05 06:16:17,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-05 06:16:17,882 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2022-04-05 06:16:17,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:16:17,885 INFO L225 Difference]: With dead ends: 651 [2022-04-05 06:16:17,885 INFO L226 Difference]: Without dead ends: 618 [2022-04-05 06:16:17,887 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=494, Invalid=1066, Unknown=0, NotChecked=0, Total=1560 [2022-04-05 06:16:17,887 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 78 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 06:16:17,887 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 85 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 06:16:17,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2022-04-05 06:16:18,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 618. [2022-04-05 06:16:18,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 537 states have (on average 1.1452513966480447) internal successors, (615), 585 states have internal predecessors, (615), 29 states have call successors, (29), 5 states have call predecessors, (29), 51 states have return successors, (51), 27 states have call predecessors, (51), 27 states have call successors, (51) [2022-04-05 06:16:18,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 695 transitions. [2022-04-05 06:16:18,039 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 695 transitions. Word has length 52 [2022-04-05 06:16:18,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:16:18,039 INFO L478 AbstractCegarLoop]: Abstraction has 618 states and 695 transitions. [2022-04-05 06:16:18,039 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-05 06:16:18,039 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 695 transitions. [2022-04-05 06:16:18,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-05 06:16:18,042 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:16:18,042 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:16:18,059 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-04-05 06:16:18,258 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:16:18,259 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:16:18,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:16:18,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1162907554, now seen corresponding path program 61 times [2022-04-05 06:16:18,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:16:18,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667012402] [2022-04-05 06:16:18,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:16:18,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:16:18,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:16:18,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:16:18,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:16:18,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:16:18,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:16:18,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-05 06:16:18,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:16:18,870 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 06:16:18,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:16:18,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667012402] [2022-04-05 06:16:18,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667012402] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:16:18,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45885546] [2022-04-05 06:16:18,871 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-05 06:16:18,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:16:18,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:16:18,888 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:16:18,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-04-05 06:16:18,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:16:18,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 63 conjunts are in the unsatisfiable core [2022-04-05 06:16:18,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:16:19,294 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 06:16:19,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:16:19,514 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 06:16:19,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45885546] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:16:19,514 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:16:19,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 41 [2022-04-05 06:16:19,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31868911] [2022-04-05 06:16:19,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:16:19,514 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-04-05 06:16:19,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:16:19,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-04-05 06:16:19,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1551, Unknown=0, NotChecked=0, Total=1640 [2022-04-05 06:16:19,515 INFO L87 Difference]: Start difference. First operand 618 states and 695 transitions. Second operand has 41 states, 38 states have (on average 1.394736842105263) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:16:22,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:16:22,076 INFO L93 Difference]: Finished difference Result 718 states and 808 transitions. [2022-04-05 06:16:22,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-05 06:16:22,076 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 38 states have (on average 1.394736842105263) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 53 [2022-04-05 06:16:22,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:16:22,081 INFO L225 Difference]: With dead ends: 718 [2022-04-05 06:16:22,081 INFO L226 Difference]: Without dead ends: 712 [2022-04-05 06:16:22,084 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 100 SyntacticMatches, 5 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=253, Invalid=5149, Unknown=0, NotChecked=0, Total=5402 [2022-04-05 06:16:22,085 INFO L913 BasicCegarLoop]: 106 mSDtfsCounter, 230 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 5693 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 5745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 5693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-04-05 06:16:22,085 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 283 Invalid, 5745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 5693 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-04-05 06:16:22,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2022-04-05 06:16:22,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 634. [2022-04-05 06:16:22,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 550 states have (on average 1.1454545454545455) internal successors, (630), 600 states have internal predecessors, (630), 30 states have call successors, (30), 5 states have call predecessors, (30), 53 states have return successors, (54), 28 states have call predecessors, (54), 28 states have call successors, (54) [2022-04-05 06:16:22,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 714 transitions. [2022-04-05 06:16:22,260 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 714 transitions. Word has length 53 [2022-04-05 06:16:22,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:16:22,260 INFO L478 AbstractCegarLoop]: Abstraction has 634 states and 714 transitions. [2022-04-05 06:16:22,261 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 38 states have (on average 1.394736842105263) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:16:22,261 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 714 transitions. [2022-04-05 06:16:22,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-05 06:16:22,265 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:16:22,265 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:16:22,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-04-05 06:16:22,465 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:16:22,466 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:16:22,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:16:22,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1647072793, now seen corresponding path program 62 times [2022-04-05 06:16:22,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:16:22,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744817768] [2022-04-05 06:16:22,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:16:22,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:16:22,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:16:22,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:16:22,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:16:22,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:16:22,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:16:22,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-05 06:16:22,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:16:22,943 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-05 06:16:22,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:16:22,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744817768] [2022-04-05 06:16:22,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744817768] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:16:22,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635208867] [2022-04-05 06:16:22,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 06:16:22,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:16:22,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:16:22,945 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:16:22,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-04-05 06:16:23,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 06:16:23,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:16:23,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 59 conjunts are in the unsatisfiable core [2022-04-05 06:16:23,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:16:23,428 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-05 06:16:23,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:16:23,673 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-05 06:16:23,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635208867] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:16:23,673 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:16:23,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 41 [2022-04-05 06:16:23,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569094232] [2022-04-05 06:16:23,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:16:23,673 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-04-05 06:16:23,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:16:23,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-04-05 06:16:23,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1547, Unknown=0, NotChecked=0, Total=1640 [2022-04-05 06:16:23,674 INFO L87 Difference]: Start difference. First operand 634 states and 714 transitions. Second operand has 41 states, 38 states have (on average 1.394736842105263) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:16:25,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:16:25,763 INFO L93 Difference]: Finished difference Result 640 states and 719 transitions. [2022-04-05 06:16:25,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-05 06:16:25,764 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 38 states have (on average 1.394736842105263) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 53 [2022-04-05 06:16:25,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:16:25,767 INFO L225 Difference]: With dead ends: 640 [2022-04-05 06:16:25,767 INFO L226 Difference]: Without dead ends: 618 [2022-04-05 06:16:25,772 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 94 SyntacticMatches, 9 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 752 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=255, Invalid=4857, Unknown=0, NotChecked=0, Total=5112 [2022-04-05 06:16:25,772 INFO L913 BasicCegarLoop]: 94 mSDtfsCounter, 163 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 4535 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 4571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 4535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-05 06:16:25,772 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 256 Invalid, 4571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 4535 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-05 06:16:25,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2022-04-05 06:16:25,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 618. [2022-04-05 06:16:25,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 537 states have (on average 1.1452513966480447) internal successors, (615), 585 states have internal predecessors, (615), 29 states have call successors, (29), 5 states have call predecessors, (29), 51 states have return successors, (52), 27 states have call predecessors, (52), 27 states have call successors, (52) [2022-04-05 06:16:25,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 696 transitions. [2022-04-05 06:16:25,942 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 696 transitions. Word has length 53 [2022-04-05 06:16:25,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:16:25,942 INFO L478 AbstractCegarLoop]: Abstraction has 618 states and 696 transitions. [2022-04-05 06:16:25,942 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 38 states have (on average 1.394736842105263) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:16:25,942 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 696 transitions. [2022-04-05 06:16:25,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-05 06:16:25,945 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:16:25,945 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:16:25,967 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-04-05 06:16:26,146 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:16:26,146 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:16:26,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:16:26,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1800218814, now seen corresponding path program 63 times [2022-04-05 06:16:26,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:16:26,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900085257] [2022-04-05 06:16:26,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:16:26,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:16:26,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:16:26,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:16:26,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:16:26,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:16:26,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:16:26,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-05 06:16:26,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:16:26,561 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 06:16:26,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:16:26,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900085257] [2022-04-05 06:16:26,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900085257] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:16:26,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612536270] [2022-04-05 06:16:26,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 06:16:26,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:16:26,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:16:26,562 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:16:26,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-04-05 06:16:26,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-04-05 06:16:26,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:16:26,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-05 06:16:26,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:16:27,116 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 06:16:27,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:16:27,352 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 06:16:27,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612536270] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:16:27,353 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:16:27,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 41 [2022-04-05 06:16:27,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514992362] [2022-04-05 06:16:27,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:16:27,353 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-04-05 06:16:27,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:16:27,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-04-05 06:16:27,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1543, Unknown=0, NotChecked=0, Total=1640 [2022-04-05 06:16:27,354 INFO L87 Difference]: Start difference. First operand 618 states and 696 transitions. Second operand has 41 states, 38 states have (on average 1.394736842105263) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:16:29,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:16:29,246 INFO L93 Difference]: Finished difference Result 624 states and 701 transitions. [2022-04-05 06:16:29,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-05 06:16:29,246 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 38 states have (on average 1.394736842105263) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 53 [2022-04-05 06:16:29,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:16:29,249 INFO L225 Difference]: With dead ends: 624 [2022-04-05 06:16:29,249 INFO L226 Difference]: Without dead ends: 600 [2022-04-05 06:16:29,252 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 92 SyntacticMatches, 9 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=257, Invalid=4573, Unknown=0, NotChecked=0, Total=4830 [2022-04-05 06:16:29,252 INFO L913 BasicCegarLoop]: 74 mSDtfsCounter, 126 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 3949 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 3985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 3949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-05 06:16:29,253 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 251 Invalid, 3985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 3949 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-05 06:16:29,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2022-04-05 06:16:29,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 600. [2022-04-05 06:16:29,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 522 states have (on average 1.1455938697318007) internal successors, (598), 568 states have internal predecessors, (598), 28 states have call successors, (28), 5 states have call predecessors, (28), 49 states have return successors, (50), 26 states have call predecessors, (50), 26 states have call successors, (50) [2022-04-05 06:16:29,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 676 transitions. [2022-04-05 06:16:29,411 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 676 transitions. Word has length 53 [2022-04-05 06:16:29,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:16:29,411 INFO L478 AbstractCegarLoop]: Abstraction has 600 states and 676 transitions. [2022-04-05 06:16:29,411 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 38 states have (on average 1.394736842105263) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:16:29,411 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 676 transitions. [2022-04-05 06:16:29,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-05 06:16:29,414 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:16:29,414 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:16:29,436 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-04-05 06:16:29,614 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:16:29,614 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:16:29,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:16:29,615 INFO L85 PathProgramCache]: Analyzing trace with hash -279022009, now seen corresponding path program 64 times [2022-04-05 06:16:29,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:16:29,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305193940] [2022-04-05 06:16:29,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:16:29,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:16:29,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:16:29,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:16:29,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:16:29,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:16:29,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:16:29,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-05 06:16:29,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:16:30,019 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-05 06:16:30,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:16:30,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305193940] [2022-04-05 06:16:30,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305193940] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:16:30,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884289385] [2022-04-05 06:16:30,020 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 06:16:30,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:16:30,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:16:30,021 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:16:30,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-04-05 06:16:30,099 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 06:16:30,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:16:30,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 51 conjunts are in the unsatisfiable core [2022-04-05 06:16:30,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:16:30,596 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-05 06:16:30,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:16:30,832 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-05 06:16:30,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884289385] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:16:30,833 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:16:30,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 41 [2022-04-05 06:16:30,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38137455] [2022-04-05 06:16:30,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:16:30,834 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-04-05 06:16:30,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:16:30,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-04-05 06:16:30,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1539, Unknown=0, NotChecked=0, Total=1640 [2022-04-05 06:16:30,834 INFO L87 Difference]: Start difference. First operand 600 states and 676 transitions. Second operand has 41 states, 38 states have (on average 1.394736842105263) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:16:32,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:16:32,280 INFO L93 Difference]: Finished difference Result 606 states and 681 transitions. [2022-04-05 06:16:32,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-05 06:16:32,281 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 38 states have (on average 1.394736842105263) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 53 [2022-04-05 06:16:32,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:16:32,283 INFO L225 Difference]: With dead ends: 606 [2022-04-05 06:16:32,283 INFO L226 Difference]: Without dead ends: 580 [2022-04-05 06:16:32,285 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 90 SyntacticMatches, 9 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=259, Invalid=4297, Unknown=0, NotChecked=0, Total=4556 [2022-04-05 06:16:32,285 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 91 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 2660 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 2694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 2660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-05 06:16:32,285 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 216 Invalid, 2694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 2660 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-05 06:16:32,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2022-04-05 06:16:32,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 580. [2022-04-05 06:16:32,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 505 states have (on average 1.1465346534653464) internal successors, (579), 549 states have internal predecessors, (579), 27 states have call successors, (27), 5 states have call predecessors, (27), 47 states have return successors, (48), 25 states have call predecessors, (48), 25 states have call successors, (48) [2022-04-05 06:16:32,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 654 transitions. [2022-04-05 06:16:32,434 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 654 transitions. Word has length 53 [2022-04-05 06:16:32,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:16:32,434 INFO L478 AbstractCegarLoop]: Abstraction has 580 states and 654 transitions. [2022-04-05 06:16:32,434 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 38 states have (on average 1.394736842105263) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:16:32,434 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 654 transitions. [2022-04-05 06:16:32,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-05 06:16:32,437 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:16:32,437 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:16:32,459 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-04-05 06:16:32,637 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:16:32,638 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:16:32,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:16:32,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1965459742, now seen corresponding path program 65 times [2022-04-05 06:16:32,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:16:32,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127876682] [2022-04-05 06:16:32,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:16:32,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:16:32,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:16:32,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:16:32,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:16:32,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:16:32,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:16:32,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-05 06:16:32,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:16:32,975 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-05 06:16:32,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:16:32,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127876682] [2022-04-05 06:16:32,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127876682] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:16:32,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085409467] [2022-04-05 06:16:32,976 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 06:16:32,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:16:32,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:16:32,977 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:16:32,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-04-05 06:16:33,055 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-04-05 06:16:33,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:16:33,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-05 06:16:33,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:16:33,601 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-05 06:16:33,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:16:33,828 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-05 06:16:33,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085409467] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:16:33,828 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:16:33,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 41 [2022-04-05 06:16:33,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125727859] [2022-04-05 06:16:33,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:16:33,829 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-04-05 06:16:33,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:16:33,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-04-05 06:16:33,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1535, Unknown=0, NotChecked=0, Total=1640 [2022-04-05 06:16:33,829 INFO L87 Difference]: Start difference. First operand 580 states and 654 transitions. Second operand has 41 states, 38 states have (on average 1.394736842105263) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:16:34,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:16:34,848 INFO L93 Difference]: Finished difference Result 598 states and 675 transitions. [2022-04-05 06:16:34,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-05 06:16:34,849 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 38 states have (on average 1.394736842105263) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 53 [2022-04-05 06:16:34,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:16:34,852 INFO L225 Difference]: With dead ends: 598 [2022-04-05 06:16:34,852 INFO L226 Difference]: Without dead ends: 592 [2022-04-05 06:16:34,854 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 88 SyntacticMatches, 9 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=261, Invalid=4029, Unknown=0, NotChecked=0, Total=4290 [2022-04-05 06:16:34,854 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 56 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 1398 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 1432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-05 06:16:34,854 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 161 Invalid, 1432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1398 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-05 06:16:34,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2022-04-05 06:16:34,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 590. [2022-04-05 06:16:34,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 512 states have (on average 1.1484375) internal successors, (588), 558 states have internal predecessors, (588), 28 states have call successors, (28), 5 states have call predecessors, (28), 49 states have return successors, (51), 26 states have call predecessors, (51), 26 states have call successors, (51) [2022-04-05 06:16:34,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 667 transitions. [2022-04-05 06:16:34,997 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 667 transitions. Word has length 53 [2022-04-05 06:16:34,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:16:34,997 INFO L478 AbstractCegarLoop]: Abstraction has 590 states and 667 transitions. [2022-04-05 06:16:34,997 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 38 states have (on average 1.394736842105263) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:16:34,997 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 667 transitions. [2022-04-05 06:16:35,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-05 06:16:35,000 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:16:35,000 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:16:35,023 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-04-05 06:16:35,201 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2022-04-05 06:16:35,201 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:16:35,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:16:35,201 INFO L85 PathProgramCache]: Analyzing trace with hash -735197027, now seen corresponding path program 66 times [2022-04-05 06:16:35,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:16:35,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571050570] [2022-04-05 06:16:35,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:16:35,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:16:35,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:16:35,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:16:35,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:16:35,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:16:35,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:16:35,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-05 06:16:35,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:16:35,626 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:16:35,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:16:35,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571050570] [2022-04-05 06:16:35,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571050570] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:16:35,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626012007] [2022-04-05 06:16:35,627 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-05 06:16:35,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:16:35,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:16:35,628 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:16:35,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-04-05 06:16:35,709 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-04-05 06:16:35,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:16:35,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-05 06:16:35,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:16:36,423 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:16:36,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:16:37,434 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:16:37,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626012007] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:16:37,434 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:16:37,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25, 25] total 67 [2022-04-05 06:16:37,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798921297] [2022-04-05 06:16:37,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:16:37,434 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-04-05 06:16:37,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:16:37,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-04-05 06:16:37,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=4200, Unknown=0, NotChecked=0, Total=4422 [2022-04-05 06:16:37,436 INFO L87 Difference]: Start difference. First operand 590 states and 667 transitions. Second operand has 67 states, 67 states have (on average 1.492537313432836) internal successors, (100), 66 states have internal predecessors, (100), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:16:42,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:16:42,099 INFO L93 Difference]: Finished difference Result 682 states and 776 transitions. [2022-04-05 06:16:42,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-04-05 06:16:42,099 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.492537313432836) internal successors, (100), 66 states have internal predecessors, (100), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 54 [2022-04-05 06:16:42,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:16:42,105 INFO L225 Difference]: With dead ends: 682 [2022-04-05 06:16:42,105 INFO L226 Difference]: Without dead ends: 668 [2022-04-05 06:16:42,108 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1612 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=740, Invalid=10602, Unknown=0, NotChecked=0, Total=11342 [2022-04-05 06:16:42,108 INFO L913 BasicCegarLoop]: 114 mSDtfsCounter, 1206 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 6616 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1211 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 6760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 6616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-04-05 06:16:42,109 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1211 Valid, 326 Invalid, 6760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 6616 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-04-05 06:16:42,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2022-04-05 06:16:42,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 659. [2022-04-05 06:16:42,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 572 states have (on average 1.1468531468531469) internal successors, (656), 624 states have internal predecessors, (656), 31 states have call successors, (31), 5 states have call predecessors, (31), 55 states have return successors, (60), 29 states have call predecessors, (60), 29 states have call successors, (60) [2022-04-05 06:16:42,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 747 transitions. [2022-04-05 06:16:42,306 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 747 transitions. Word has length 54 [2022-04-05 06:16:42,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:16:42,306 INFO L478 AbstractCegarLoop]: Abstraction has 659 states and 747 transitions. [2022-04-05 06:16:42,306 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.492537313432836) internal successors, (100), 66 states have internal predecessors, (100), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:16:42,306 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 747 transitions. [2022-04-05 06:16:42,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-05 06:16:42,309 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:16:42,310 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:16:42,333 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-04-05 06:16:42,510 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2022-04-05 06:16:42,510 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:16:42,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:16:42,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1400179859, now seen corresponding path program 67 times [2022-04-05 06:16:42,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:16:42,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408226191] [2022-04-05 06:16:42,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:16:42,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:16:42,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:16:42,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:16:42,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:16:42,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:16:42,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:16:42,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-05 06:16:42,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:16:42,916 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:16:42,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:16:42,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408226191] [2022-04-05 06:16:42,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408226191] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:16:42,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607759707] [2022-04-05 06:16:42,917 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-05 06:16:42,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:16:42,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:16:42,918 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:16:42,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-04-05 06:16:42,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:16:42,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-05 06:16:43,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:16:43,716 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:16:43,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:16:44,732 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:16:44,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607759707] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:16:44,732 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:16:44,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25, 25] total 67 [2022-04-05 06:16:44,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130205265] [2022-04-05 06:16:44,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:16:44,733 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-04-05 06:16:44,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:16:44,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-04-05 06:16:44,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=4200, Unknown=0, NotChecked=0, Total=4422 [2022-04-05 06:16:44,734 INFO L87 Difference]: Start difference. First operand 659 states and 747 transitions. Second operand has 67 states, 67 states have (on average 1.492537313432836) internal successors, (100), 66 states have internal predecessors, (100), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:16:49,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:16:49,536 INFO L93 Difference]: Finished difference Result 674 states and 762 transitions. [2022-04-05 06:16:49,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-04-05 06:16:49,536 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.492537313432836) internal successors, (100), 66 states have internal predecessors, (100), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 54 [2022-04-05 06:16:49,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:16:49,540 INFO L225 Difference]: With dead ends: 674 [2022-04-05 06:16:49,540 INFO L226 Difference]: Without dead ends: 662 [2022-04-05 06:16:49,542 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1625 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=740, Invalid=10602, Unknown=0, NotChecked=0, Total=11342 [2022-04-05 06:16:49,543 INFO L913 BasicCegarLoop]: 116 mSDtfsCounter, 1188 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 7105 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1207 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 7232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 7105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-04-05 06:16:49,543 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1207 Valid, 338 Invalid, 7232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 7105 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-04-05 06:16:49,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2022-04-05 06:16:49,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 660. [2022-04-05 06:16:49,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 573 states have (on average 1.1465968586387434) internal successors, (657), 625 states have internal predecessors, (657), 31 states have call successors, (31), 5 states have call predecessors, (31), 55 states have return successors, (56), 29 states have call predecessors, (56), 29 states have call successors, (56) [2022-04-05 06:16:49,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 744 transitions. [2022-04-05 06:16:49,737 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 744 transitions. Word has length 54 [2022-04-05 06:16:49,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:16:49,737 INFO L478 AbstractCegarLoop]: Abstraction has 660 states and 744 transitions. [2022-04-05 06:16:49,737 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.492537313432836) internal successors, (100), 66 states have internal predecessors, (100), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:16:49,737 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 744 transitions. [2022-04-05 06:16:49,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-05 06:16:49,741 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:16:49,741 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:16:49,764 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-04-05 06:16:49,941 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-04-05 06:16:49,942 INFO L403 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:16:49,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:16:49,942 INFO L85 PathProgramCache]: Analyzing trace with hash -884356933, now seen corresponding path program 68 times [2022-04-05 06:16:49,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:16:49,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330707652] [2022-04-05 06:16:49,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:16:49,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:16:49,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:16:49,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:16:49,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:16:49,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:16:49,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:16:49,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-05 06:16:49,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:16:50,036 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-04-05 06:16:50,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:16:50,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330707652] [2022-04-05 06:16:50,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330707652] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:16:50,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992539938] [2022-04-05 06:16:50,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 06:16:50,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:16:50,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:16:50,038 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:16:50,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-04-05 06:16:50,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 06:16:50,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:16:50,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-05 06:16:50,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:16:50,256 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-04-05 06:16:50,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:16:50,328 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-04-05 06:16:50,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992539938] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:16:50,328 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:16:50,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 21 [2022-04-05 06:16:50,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915653832] [2022-04-05 06:16:50,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:16:50,328 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-05 06:16:50,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:16:50,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-05 06:16:50,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2022-04-05 06:16:50,329 INFO L87 Difference]: Start difference. First operand 660 states and 744 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-05 06:16:51,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:16:51,022 INFO L93 Difference]: Finished difference Result 818 states and 933 transitions. [2022-04-05 06:16:51,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-05 06:16:51,023 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 54 [2022-04-05 06:16:51,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:16:51,026 INFO L225 Difference]: With dead ends: 818 [2022-04-05 06:16:51,026 INFO L226 Difference]: Without dead ends: 772 [2022-04-05 06:16:51,030 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=579, Invalid=1677, Unknown=0, NotChecked=0, Total=2256 [2022-04-05 06:16:51,030 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 177 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 06:16:51,030 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 80 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 06:16:51,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2022-04-05 06:16:51,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 742. [2022-04-05 06:16:51,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 655 states have (on average 1.1450381679389312) internal successors, (750), 707 states have internal predecessors, (750), 31 states have call successors, (31), 5 states have call predecessors, (31), 55 states have return successors, (56), 29 states have call predecessors, (56), 29 states have call successors, (56) [2022-04-05 06:16:51,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 837 transitions. [2022-04-05 06:16:51,252 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 837 transitions. Word has length 54 [2022-04-05 06:16:51,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:16:51,252 INFO L478 AbstractCegarLoop]: Abstraction has 742 states and 837 transitions. [2022-04-05 06:16:51,252 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-05 06:16:51,252 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 837 transitions. [2022-04-05 06:16:51,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-05 06:16:51,257 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:16:51,257 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:16:51,279 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-04-05 06:16:51,457 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-04-05 06:16:51,458 INFO L403 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:16:51,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:16:51,458 INFO L85 PathProgramCache]: Analyzing trace with hash -68187530, now seen corresponding path program 69 times [2022-04-05 06:16:51,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:16:51,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598262760] [2022-04-05 06:16:51,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:16:51,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:16:51,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:16:51,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:16:51,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:16:51,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:16:51,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:16:51,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-05 06:16:51,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:16:51,560 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-04-05 06:16:51,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:16:51,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598262760] [2022-04-05 06:16:51,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598262760] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:16:51,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221934173] [2022-04-05 06:16:51,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 06:16:51,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:16:51,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:16:51,561 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:16:51,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-04-05 06:16:51,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-04-05 06:16:51,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:16:51,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-05 06:16:51,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:16:51,785 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-04-05 06:16:51,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:16:51,868 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-04-05 06:16:51,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221934173] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:16:51,868 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:16:51,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 21 [2022-04-05 06:16:51,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042992931] [2022-04-05 06:16:51,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:16:51,869 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-05 06:16:51,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:16:51,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-05 06:16:51,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2022-04-05 06:16:51,869 INFO L87 Difference]: Start difference. First operand 742 states and 837 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:16:52,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:16:52,626 INFO L93 Difference]: Finished difference Result 1298 states and 1460 transitions. [2022-04-05 06:16:52,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-05 06:16:52,626 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 54 [2022-04-05 06:16:52,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:16:52,636 INFO L225 Difference]: With dead ends: 1298 [2022-04-05 06:16:52,636 INFO L226 Difference]: Without dead ends: 854 [2022-04-05 06:16:52,641 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=579, Invalid=1677, Unknown=0, NotChecked=0, Total=2256 [2022-04-05 06:16:52,642 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 176 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 06:16:52,642 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 80 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 06:16:52,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 854 states. [2022-04-05 06:16:52,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 854 to 824. [2022-04-05 06:16:52,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 737 states have (on average 1.1438263229308006) internal successors, (843), 789 states have internal predecessors, (843), 31 states have call successors, (31), 5 states have call predecessors, (31), 55 states have return successors, (56), 29 states have call predecessors, (56), 29 states have call successors, (56) [2022-04-05 06:16:52,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 930 transitions. [2022-04-05 06:16:52,919 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 930 transitions. Word has length 54 [2022-04-05 06:16:52,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:16:52,919 INFO L478 AbstractCegarLoop]: Abstraction has 824 states and 930 transitions. [2022-04-05 06:16:52,919 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:16:52,920 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 930 transitions. [2022-04-05 06:16:52,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-05 06:16:52,924 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:16:52,925 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:16:52,947 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-04-05 06:16:53,125 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:16:53,125 INFO L403 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:16:53,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:16:53,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1969690164, now seen corresponding path program 70 times [2022-04-05 06:16:53,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:16:53,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838056331] [2022-04-05 06:16:53,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:16:53,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:16:53,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:16:53,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:16:53,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:16:53,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:16:53,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:16:53,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-05 06:16:53,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:16:53,757 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 06:16:53,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:16:53,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838056331] [2022-04-05 06:16:53,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838056331] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:16:53,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963234277] [2022-04-05 06:16:53,758 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 06:16:53,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:16:53,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:16:53,759 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:16:53,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-04-05 06:16:53,843 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 06:16:53,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:16:53,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 67 conjunts are in the unsatisfiable core [2022-04-05 06:16:53,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:16:54,175 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 06:16:54,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:16:54,405 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 06:16:54,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963234277] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:16:54,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:16:54,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 43 [2022-04-05 06:16:54,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519328145] [2022-04-05 06:16:54,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:16:54,405 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-04-05 06:16:54,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:16:54,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-04-05 06:16:54,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1713, Unknown=0, NotChecked=0, Total=1806 [2022-04-05 06:16:54,406 INFO L87 Difference]: Start difference. First operand 824 states and 930 transitions. Second operand has 43 states, 40 states have (on average 1.375) internal successors, (55), 37 states have internal predecessors, (55), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:16:57,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:16:57,285 INFO L93 Difference]: Finished difference Result 940 states and 1061 transitions. [2022-04-05 06:16:57,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-05 06:16:57,285 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 40 states have (on average 1.375) internal successors, (55), 37 states have internal predecessors, (55), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 55 [2022-04-05 06:16:57,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:16:57,290 INFO L225 Difference]: With dead ends: 940 [2022-04-05 06:16:57,290 INFO L226 Difference]: Without dead ends: 934 [2022-04-05 06:16:57,294 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 104 SyntacticMatches, 5 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=265, Invalid=5741, Unknown=0, NotChecked=0, Total=6006 [2022-04-05 06:16:57,294 INFO L913 BasicCegarLoop]: 118 mSDtfsCounter, 254 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 6136 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 6190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 6136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-04-05 06:16:57,294 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 290 Invalid, 6190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 6136 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-04-05 06:16:57,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 934 states. [2022-04-05 06:16:57,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 840. [2022-04-05 06:16:57,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 750 states have (on average 1.144) internal successors, (858), 804 states have internal predecessors, (858), 32 states have call successors, (32), 5 states have call predecessors, (32), 57 states have return successors, (59), 30 states have call predecessors, (59), 30 states have call successors, (59) [2022-04-05 06:16:57,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 949 transitions. [2022-04-05 06:16:57,563 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 949 transitions. Word has length 55 [2022-04-05 06:16:57,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:16:57,563 INFO L478 AbstractCegarLoop]: Abstraction has 840 states and 949 transitions. [2022-04-05 06:16:57,563 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 40 states have (on average 1.375) internal successors, (55), 37 states have internal predecessors, (55), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:16:57,563 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 949 transitions. [2022-04-05 06:16:57,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-05 06:16:57,569 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:16:57,569 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:16:57,592 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-04-05 06:16:57,769 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:16:57,770 INFO L403 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:16:57,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:16:57,770 INFO L85 PathProgramCache]: Analyzing trace with hash -180702025, now seen corresponding path program 71 times [2022-04-05 06:16:57,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:16:57,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566153540] [2022-04-05 06:16:57,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:16:57,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:16:57,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:16:57,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:16:57,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:16:57,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:16:57,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:16:57,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-05 06:16:57,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:16:58,311 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-05 06:16:58,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:16:58,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566153540] [2022-04-05 06:16:58,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566153540] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:16:58,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625334507] [2022-04-05 06:16:58,311 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 06:16:58,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:16:58,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:16:58,312 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:16:58,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-04-05 06:16:58,400 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-04-05 06:16:58,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:16:58,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 63 conjunts are in the unsatisfiable core [2022-04-05 06:16:58,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:16:58,853 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-05 06:16:58,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:16:59,113 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-05 06:16:59,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625334507] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:16:59,114 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:16:59,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 43 [2022-04-05 06:16:59,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211626019] [2022-04-05 06:16:59,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:16:59,114 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-04-05 06:16:59,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:16:59,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-04-05 06:16:59,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1709, Unknown=0, NotChecked=0, Total=1806 [2022-04-05 06:16:59,115 INFO L87 Difference]: Start difference. First operand 840 states and 949 transitions. Second operand has 43 states, 40 states have (on average 1.375) internal successors, (55), 37 states have internal predecessors, (55), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:17:01,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:17:01,786 INFO L93 Difference]: Finished difference Result 846 states and 954 transitions. [2022-04-05 06:17:01,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-05 06:17:01,787 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 40 states have (on average 1.375) internal successors, (55), 37 states have internal predecessors, (55), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 55 [2022-04-05 06:17:01,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:17:01,792 INFO L225 Difference]: With dead ends: 846 [2022-04-05 06:17:01,792 INFO L226 Difference]: Without dead ends: 824 [2022-04-05 06:17:01,796 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 98 SyntacticMatches, 9 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 831 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=267, Invalid=5433, Unknown=0, NotChecked=0, Total=5700 [2022-04-05 06:17:01,796 INFO L913 BasicCegarLoop]: 98 mSDtfsCounter, 186 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 5897 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 5937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 5897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-04-05 06:17:01,796 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 295 Invalid, 5937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 5897 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-04-05 06:17:01,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2022-04-05 06:17:02,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 824. [2022-04-05 06:17:02,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 737 states have (on average 1.1438263229308006) internal successors, (843), 789 states have internal predecessors, (843), 31 states have call successors, (31), 5 states have call predecessors, (31), 55 states have return successors, (57), 29 states have call predecessors, (57), 29 states have call successors, (57) [2022-04-05 06:17:02,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 931 transitions. [2022-04-05 06:17:02,105 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 931 transitions. Word has length 55 [2022-04-05 06:17:02,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:17:02,106 INFO L478 AbstractCegarLoop]: Abstraction has 824 states and 931 transitions. [2022-04-05 06:17:02,106 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 40 states have (on average 1.375) internal successors, (55), 37 states have internal predecessors, (55), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:17:02,106 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 931 transitions. [2022-04-05 06:17:02,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-05 06:17:02,111 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:17:02,111 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:17:02,134 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-04-05 06:17:02,311 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:17:02,311 INFO L403 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:17:02,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:17:02,312 INFO L85 PathProgramCache]: Analyzing trace with hash 119567148, now seen corresponding path program 72 times [2022-04-05 06:17:02,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:17:02,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170940761] [2022-04-05 06:17:02,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:17:02,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:17:02,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:17:02,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:17:02,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:17:02,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:17:02,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:17:02,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-05 06:17:02,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:17:02,776 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 06:17:02,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:17:02,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170940761] [2022-04-05 06:17:02,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170940761] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:17:02,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889219667] [2022-04-05 06:17:02,776 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-05 06:17:02,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:17:02,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:17:02,777 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:17:02,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-04-05 06:17:02,862 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-05 06:17:02,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:17:02,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 59 conjunts are in the unsatisfiable core [2022-04-05 06:17:02,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:17:03,344 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 06:17:03,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:17:03,593 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 06:17:03,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889219667] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:17:03,594 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:17:03,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 43 [2022-04-05 06:17:03,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106149012] [2022-04-05 06:17:03,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:17:03,594 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-04-05 06:17:03,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:17:03,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-04-05 06:17:03,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1705, Unknown=0, NotChecked=0, Total=1806 [2022-04-05 06:17:03,595 INFO L87 Difference]: Start difference. First operand 824 states and 931 transitions. Second operand has 43 states, 40 states have (on average 1.375) internal successors, (55), 37 states have internal predecessors, (55), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:17:05,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:17:05,578 INFO L93 Difference]: Finished difference Result 830 states and 936 transitions. [2022-04-05 06:17:05,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-05 06:17:05,579 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 40 states have (on average 1.375) internal successors, (55), 37 states have internal predecessors, (55), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 55 [2022-04-05 06:17:05,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:17:05,593 INFO L225 Difference]: With dead ends: 830 [2022-04-05 06:17:05,594 INFO L226 Difference]: Without dead ends: 806 [2022-04-05 06:17:05,598 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 96 SyntacticMatches, 9 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 836 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=269, Invalid=5133, Unknown=0, NotChecked=0, Total=5402 [2022-04-05 06:17:05,598 INFO L913 BasicCegarLoop]: 78 mSDtfsCounter, 151 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 3765 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 3805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 3765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-05 06:17:05,598 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 235 Invalid, 3805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 3765 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-05 06:17:05,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2022-04-05 06:17:05,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 806. [2022-04-05 06:17:05,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 722 states have (on average 1.1440443213296398) internal successors, (826), 772 states have internal predecessors, (826), 30 states have call successors, (30), 5 states have call predecessors, (30), 53 states have return successors, (55), 28 states have call predecessors, (55), 28 states have call successors, (55) [2022-04-05 06:17:05,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 911 transitions. [2022-04-05 06:17:05,877 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 911 transitions. Word has length 55 [2022-04-05 06:17:05,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:17:05,878 INFO L478 AbstractCegarLoop]: Abstraction has 806 states and 911 transitions. [2022-04-05 06:17:05,878 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 40 states have (on average 1.375) internal successors, (55), 37 states have internal predecessors, (55), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:17:05,878 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 911 transitions. [2022-04-05 06:17:05,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-05 06:17:05,882 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:17:05,882 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:17:05,905 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-04-05 06:17:06,083 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2022-04-05 06:17:06,083 INFO L403 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:17:06,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:17:06,083 INFO L85 PathProgramCache]: Analyzing trace with hash -248588457, now seen corresponding path program 73 times [2022-04-05 06:17:06,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:17:06,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376369472] [2022-04-05 06:17:06,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:17:06,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:17:06,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:17:06,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:17:06,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:17:06,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:17:06,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:17:06,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-05 06:17:06,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:17:06,555 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-05 06:17:06,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:17:06,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376369472] [2022-04-05 06:17:06,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376369472] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:17:06,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678319860] [2022-04-05 06:17:06,556 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-05 06:17:06,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:17:06,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:17:06,557 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:17:06,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-04-05 06:17:06,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:17:06,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-05 06:17:06,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:17:07,184 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-05 06:17:07,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:17:07,425 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-05 06:17:07,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678319860] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:17:07,426 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:17:07,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 43 [2022-04-05 06:17:07,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15760128] [2022-04-05 06:17:07,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:17:07,426 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-04-05 06:17:07,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:17:07,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-04-05 06:17:07,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1701, Unknown=0, NotChecked=0, Total=1806 [2022-04-05 06:17:07,427 INFO L87 Difference]: Start difference. First operand 806 states and 911 transitions. Second operand has 43 states, 40 states have (on average 1.375) internal successors, (55), 37 states have internal predecessors, (55), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:17:09,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:17:09,078 INFO L93 Difference]: Finished difference Result 812 states and 916 transitions. [2022-04-05 06:17:09,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-05 06:17:09,079 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 40 states have (on average 1.375) internal successors, (55), 37 states have internal predecessors, (55), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 55 [2022-04-05 06:17:09,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:17:09,083 INFO L225 Difference]: With dead ends: 812 [2022-04-05 06:17:09,083 INFO L226 Difference]: Without dead ends: 786 [2022-04-05 06:17:09,087 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 94 SyntacticMatches, 9 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 841 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=271, Invalid=4841, Unknown=0, NotChecked=0, Total=5112 [2022-04-05 06:17:09,087 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 114 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 2735 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 2773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 2735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-05 06:17:09,087 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 205 Invalid, 2773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 2735 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-05 06:17:09,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2022-04-05 06:17:09,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 786. [2022-04-05 06:17:09,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 705 states have (on average 1.1446808510638298) internal successors, (807), 753 states have internal predecessors, (807), 29 states have call successors, (29), 5 states have call predecessors, (29), 51 states have return successors, (53), 27 states have call predecessors, (53), 27 states have call successors, (53) [2022-04-05 06:17:09,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 889 transitions. [2022-04-05 06:17:09,352 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 889 transitions. Word has length 55 [2022-04-05 06:17:09,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:17:09,352 INFO L478 AbstractCegarLoop]: Abstraction has 786 states and 889 transitions. [2022-04-05 06:17:09,352 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 40 states have (on average 1.375) internal successors, (55), 37 states have internal predecessors, (55), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:17:09,352 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 889 transitions. [2022-04-05 06:17:09,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-05 06:17:09,356 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:17:09,357 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:17:09,379 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-04-05 06:17:09,557 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:17:09,557 INFO L403 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:17:09,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:17:09,557 INFO L85 PathProgramCache]: Analyzing trace with hash 657110074, now seen corresponding path program 74 times [2022-04-05 06:17:09,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:17:09,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624759069] [2022-04-05 06:17:09,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:17:09,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:17:09,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:17:09,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:17:09,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:17:09,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:17:09,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:17:09,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-05 06:17:09,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:17:09,835 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-05 06:17:09,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:17:09,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624759069] [2022-04-05 06:17:09,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624759069] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:17:09,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121741334] [2022-04-05 06:17:09,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 06:17:09,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:17:09,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:17:09,836 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:17:09,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-04-05 06:17:09,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 06:17:09,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:17:09,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-05 06:17:09,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:17:10,290 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-04-05 06:17:10,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:17:10,801 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-04-05 06:17:10,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121741334] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:17:10,801 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:17:10,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17, 17] total 45 [2022-04-05 06:17:10,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880607486] [2022-04-05 06:17:10,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:17:10,802 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-04-05 06:17:10,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:17:10,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-04-05 06:17:10,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1823, Unknown=0, NotChecked=0, Total=1980 [2022-04-05 06:17:10,803 INFO L87 Difference]: Start difference. First operand 786 states and 889 transitions. Second operand has 45 states, 45 states have (on average 1.5555555555555556) internal successors, (70), 44 states have internal predecessors, (70), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:17:12,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:17:12,852 INFO L93 Difference]: Finished difference Result 874 states and 995 transitions. [2022-04-05 06:17:12,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-05 06:17:12,852 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.5555555555555556) internal successors, (70), 44 states have internal predecessors, (70), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 55 [2022-04-05 06:17:12,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:17:12,863 INFO L225 Difference]: With dead ends: 874 [2022-04-05 06:17:12,864 INFO L226 Difference]: Without dead ends: 856 [2022-04-05 06:17:12,868 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 85 SyntacticMatches, 5 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=404, Invalid=4288, Unknown=0, NotChecked=0, Total=4692 [2022-04-05 06:17:12,868 INFO L913 BasicCegarLoop]: 83 mSDtfsCounter, 463 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 2638 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 2698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 2638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-05 06:17:12,868 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [467 Valid, 200 Invalid, 2698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 2638 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-05 06:17:12,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2022-04-05 06:17:13,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 851. [2022-04-05 06:17:13,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 743 states have (on average 1.135935397039031) internal successors, (844), 809 states have internal predecessors, (844), 38 states have call successors, (38), 5 states have call predecessors, (38), 69 states have return successors, (80), 36 states have call predecessors, (80), 36 states have call successors, (80) [2022-04-05 06:17:13,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 962 transitions. [2022-04-05 06:17:13,128 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 962 transitions. Word has length 55 [2022-04-05 06:17:13,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:17:13,128 INFO L478 AbstractCegarLoop]: Abstraction has 851 states and 962 transitions. [2022-04-05 06:17:13,128 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.5555555555555556) internal successors, (70), 44 states have internal predecessors, (70), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:17:13,129 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 962 transitions. [2022-04-05 06:17:13,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-05 06:17:13,134 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:17:13,134 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:17:13,157 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-04-05 06:17:13,334 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:17:13,335 INFO L403 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:17:13,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:17:13,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1188439180, now seen corresponding path program 75 times [2022-04-05 06:17:13,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:17:13,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190180919] [2022-04-05 06:17:13,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:17:13,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:17:13,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:17:13,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:17:13,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:17:13,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:17:13,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:17:13,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-05 06:17:13,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:17:13,713 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-05 06:17:13,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:17:13,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190180919] [2022-04-05 06:17:13,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190180919] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:17:13,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434826087] [2022-04-05 06:17:13,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 06:17:13,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:17:13,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:17:13,715 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:17:13,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-04-05 06:17:13,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-04-05 06:17:13,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:17:13,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 51 conjunts are in the unsatisfiable core [2022-04-05 06:17:13,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:17:14,379 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-05 06:17:14,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:17:14,612 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-05 06:17:14,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434826087] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:17:14,612 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:17:14,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 43 [2022-04-05 06:17:14,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380706910] [2022-04-05 06:17:14,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:17:14,613 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-04-05 06:17:14,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:17:14,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-04-05 06:17:14,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1697, Unknown=0, NotChecked=0, Total=1806 [2022-04-05 06:17:14,613 INFO L87 Difference]: Start difference. First operand 851 states and 962 transitions. Second operand has 43 states, 40 states have (on average 1.375) internal successors, (55), 37 states have internal predecessors, (55), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:17:16,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:17:16,049 INFO L93 Difference]: Finished difference Result 869 states and 984 transitions. [2022-04-05 06:17:16,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-05 06:17:16,049 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 40 states have (on average 1.375) internal successors, (55), 37 states have internal predecessors, (55), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 55 [2022-04-05 06:17:16,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:17:16,054 INFO L225 Difference]: With dead ends: 869 [2022-04-05 06:17:16,054 INFO L226 Difference]: Without dead ends: 851 [2022-04-05 06:17:16,058 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 92 SyntacticMatches, 9 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=273, Invalid=4557, Unknown=0, NotChecked=0, Total=4830 [2022-04-05 06:17:16,059 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 76 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 2238 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 2274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 2238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-05 06:17:16,059 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 208 Invalid, 2274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 2238 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-05 06:17:16,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 851 states. [2022-04-05 06:17:16,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 851 to 846. [2022-04-05 06:17:16,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 738 states have (on average 1.1382113821138211) internal successors, (840), 804 states have internal predecessors, (840), 38 states have call successors, (38), 5 states have call predecessors, (38), 69 states have return successors, (80), 36 states have call predecessors, (80), 36 states have call successors, (80) [2022-04-05 06:17:16,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 958 transitions. [2022-04-05 06:17:16,355 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 958 transitions. Word has length 55 [2022-04-05 06:17:16,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:17:16,355 INFO L478 AbstractCegarLoop]: Abstraction has 846 states and 958 transitions. [2022-04-05 06:17:16,356 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 40 states have (on average 1.375) internal successors, (55), 37 states have internal predecessors, (55), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:17:16,356 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 958 transitions. [2022-04-05 06:17:16,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-05 06:17:16,362 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:17:16,362 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:17:16,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-04-05 06:17:16,575 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2022-04-05 06:17:16,575 INFO L403 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:17:16,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:17:16,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1923856847, now seen corresponding path program 76 times [2022-04-05 06:17:16,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:17:16,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244901494] [2022-04-05 06:17:16,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:17:16,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:17:16,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:17:16,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:17:16,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:17:16,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:17:16,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:17:16,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-05 06:17:16,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:17:16,868 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-05 06:17:16,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:17:16,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244901494] [2022-04-05 06:17:16,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244901494] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:17:16,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706865108] [2022-04-05 06:17:16,868 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 06:17:16,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:17:16,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:17:16,869 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:17:16,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-04-05 06:17:16,949 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 06:17:16,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:17:16,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-05 06:17:16,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:17:17,321 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-04-05 06:17:17,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:17:17,835 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-04-05 06:17:17,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706865108] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:17:17,835 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:17:17,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17, 17] total 45 [2022-04-05 06:17:17,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642592683] [2022-04-05 06:17:17,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:17:17,835 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-04-05 06:17:17,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:17:17,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-04-05 06:17:17,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1823, Unknown=0, NotChecked=0, Total=1980 [2022-04-05 06:17:17,836 INFO L87 Difference]: Start difference. First operand 846 states and 958 transitions. Second operand has 45 states, 45 states have (on average 1.5555555555555556) internal successors, (70), 44 states have internal predecessors, (70), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:17:19,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:17:19,898 INFO L93 Difference]: Finished difference Result 860 states and 971 transitions. [2022-04-05 06:17:19,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-05 06:17:19,907 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.5555555555555556) internal successors, (70), 44 states have internal predecessors, (70), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 55 [2022-04-05 06:17:19,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:17:19,911 INFO L225 Difference]: With dead ends: 860 [2022-04-05 06:17:19,911 INFO L226 Difference]: Without dead ends: 834 [2022-04-05 06:17:19,915 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 84 SyntacticMatches, 6 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=404, Invalid=4288, Unknown=0, NotChecked=0, Total=4692 [2022-04-05 06:17:19,916 INFO L913 BasicCegarLoop]: 81 mSDtfsCounter, 605 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 2670 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 616 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 2723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 2670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-05 06:17:19,916 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [616 Valid, 203 Invalid, 2723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 2670 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-05 06:17:19,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2022-04-05 06:17:20,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 832. [2022-04-05 06:17:20,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 832 states, 724 states have (on average 1.138121546961326) internal successors, (824), 790 states have internal predecessors, (824), 38 states have call successors, (38), 5 states have call predecessors, (38), 69 states have return successors, (72), 36 states have call predecessors, (72), 36 states have call successors, (72) [2022-04-05 06:17:20,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 934 transitions. [2022-04-05 06:17:20,182 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 934 transitions. Word has length 55 [2022-04-05 06:17:20,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:17:20,182 INFO L478 AbstractCegarLoop]: Abstraction has 832 states and 934 transitions. [2022-04-05 06:17:20,182 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.5555555555555556) internal successors, (70), 44 states have internal predecessors, (70), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:17:20,182 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 934 transitions. [2022-04-05 06:17:20,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-04-05 06:17:20,188 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:17:20,188 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:17:20,205 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-04-05 06:17:20,389 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:17:20,389 INFO L403 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:17:20,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:17:20,390 INFO L85 PathProgramCache]: Analyzing trace with hash 938521523, now seen corresponding path program 77 times [2022-04-05 06:17:20,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:17:20,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131370493] [2022-04-05 06:17:20,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:17:20,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:17:20,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:17:20,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:17:20,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:17:20,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:17:20,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:17:20,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-05 06:17:20,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:17:20,831 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:17:20,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:17:20,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131370493] [2022-04-05 06:17:20,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131370493] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:17:20,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067725287] [2022-04-05 06:17:20,832 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 06:17:20,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:17:20,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:17:20,832 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:17:20,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-04-05 06:17:20,918 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-04-05 06:17:20,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:17:20,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 32 conjunts are in the unsatisfiable core [2022-04-05 06:17:20,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:17:21,737 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:17:21,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:17:22,878 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:17:22,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067725287] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:17:22,878 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:17:22,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 27, 27] total 73 [2022-04-05 06:17:22,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639545319] [2022-04-05 06:17:22,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:17:22,879 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-04-05 06:17:22,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:17:22,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-04-05 06:17:22,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=5013, Unknown=0, NotChecked=0, Total=5256 [2022-04-05 06:17:22,880 INFO L87 Difference]: Start difference. First operand 832 states and 934 transitions. Second operand has 73 states, 73 states have (on average 1.452054794520548) internal successors, (106), 72 states have internal predecessors, (106), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:17:28,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:17:28,395 INFO L93 Difference]: Finished difference Result 948 states and 1071 transitions. [2022-04-05 06:17:28,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-04-05 06:17:28,395 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.452054794520548) internal successors, (106), 72 states have internal predecessors, (106), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 56 [2022-04-05 06:17:28,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:17:28,402 INFO L225 Difference]: With dead ends: 948 [2022-04-05 06:17:28,403 INFO L226 Difference]: Without dead ends: 934 [2022-04-05 06:17:28,408 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1949 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=846, Invalid=12726, Unknown=0, NotChecked=0, Total=13572 [2022-04-05 06:17:28,408 INFO L913 BasicCegarLoop]: 124 mSDtfsCounter, 1454 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 7558 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1459 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 7727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 7558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-04-05 06:17:28,408 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1459 Valid, 336 Invalid, 7727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 7558 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-04-05 06:17:28,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 934 states. [2022-04-05 06:17:28,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 925. [2022-04-05 06:17:28,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 925 states, 805 states have (on average 1.1366459627329193) internal successors, (915), 879 states have internal predecessors, (915), 42 states have call successors, (42), 5 states have call predecessors, (42), 77 states have return successors, (84), 40 states have call predecessors, (84), 40 states have call successors, (84) [2022-04-05 06:17:28,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 925 states to 925 states and 1041 transitions. [2022-04-05 06:17:28,712 INFO L78 Accepts]: Start accepts. Automaton has 925 states and 1041 transitions. Word has length 56 [2022-04-05 06:17:28,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:17:28,712 INFO L478 AbstractCegarLoop]: Abstraction has 925 states and 1041 transitions. [2022-04-05 06:17:28,712 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.452054794520548) internal successors, (106), 72 states have internal predecessors, (106), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:17:28,712 INFO L276 IsEmpty]: Start isEmpty. Operand 925 states and 1041 transitions. [2022-04-05 06:17:28,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-04-05 06:17:28,718 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:17:28,718 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:17:28,740 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-04-05 06:17:28,918 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:17:28,919 INFO L403 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:17:28,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:17:28,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1584271747, now seen corresponding path program 78 times [2022-04-05 06:17:28,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:17:28,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022039008] [2022-04-05 06:17:28,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:17:28,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:17:28,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:17:28,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:17:28,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:17:28,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:17:28,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:17:29,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-05 06:17:29,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:17:29,353 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:17:29,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:17:29,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022039008] [2022-04-05 06:17:29,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022039008] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:17:29,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443556862] [2022-04-05 06:17:29,354 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-05 06:17:29,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:17:29,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:17:29,355 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:17:29,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-04-05 06:17:29,447 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-05 06:17:29,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:17:29,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 32 conjunts are in the unsatisfiable core [2022-04-05 06:17:29,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:17:30,268 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:17:30,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:17:31,415 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:17:31,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443556862] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:17:31,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:17:31,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 27, 27] total 73 [2022-04-05 06:17:31,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233779839] [2022-04-05 06:17:31,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:17:31,416 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-04-05 06:17:31,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:17:31,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-04-05 06:17:31,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=5013, Unknown=0, NotChecked=0, Total=5256 [2022-04-05 06:17:31,417 INFO L87 Difference]: Start difference. First operand 925 states and 1041 transitions. Second operand has 73 states, 73 states have (on average 1.452054794520548) internal successors, (106), 72 states have internal predecessors, (106), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:17:36,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:17:36,715 INFO L93 Difference]: Finished difference Result 940 states and 1056 transitions. [2022-04-05 06:17:36,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-04-05 06:17:36,715 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.452054794520548) internal successors, (106), 72 states have internal predecessors, (106), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 56 [2022-04-05 06:17:36,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:17:36,720 INFO L225 Difference]: With dead ends: 940 [2022-04-05 06:17:36,720 INFO L226 Difference]: Without dead ends: 928 [2022-04-05 06:17:36,725 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1963 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=846, Invalid=12726, Unknown=0, NotChecked=0, Total=13572 [2022-04-05 06:17:36,726 INFO L913 BasicCegarLoop]: 126 mSDtfsCounter, 1525 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 6677 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1546 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 6827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 6677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-04-05 06:17:36,726 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1546 Valid, 313 Invalid, 6827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 6677 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-04-05 06:17:36,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2022-04-05 06:17:37,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 926. [2022-04-05 06:17:37,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 806 states have (on average 1.1364764267990075) internal successors, (916), 880 states have internal predecessors, (916), 42 states have call successors, (42), 5 states have call predecessors, (42), 77 states have return successors, (79), 40 states have call predecessors, (79), 40 states have call successors, (79) [2022-04-05 06:17:37,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 1037 transitions. [2022-04-05 06:17:37,055 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 1037 transitions. Word has length 56 [2022-04-05 06:17:37,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:17:37,055 INFO L478 AbstractCegarLoop]: Abstraction has 926 states and 1037 transitions. [2022-04-05 06:17:37,055 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.452054794520548) internal successors, (106), 72 states have internal predecessors, (106), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:17:37,055 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 1037 transitions. [2022-04-05 06:17:37,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-04-05 06:17:37,061 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:17:37,061 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:17:37,084 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-04-05 06:17:37,262 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:17:37,262 INFO L403 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:17:37,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:17:37,262 INFO L85 PathProgramCache]: Analyzing trace with hash -2014023679, now seen corresponding path program 79 times [2022-04-05 06:17:37,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:17:37,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74009387] [2022-04-05 06:17:37,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:17:37,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:17:37,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:17:37,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:17:37,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:17:37,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:17:37,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:17:37,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-05 06:17:37,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:17:37,353 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-04-05 06:17:37,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:17:37,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74009387] [2022-04-05 06:17:37,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74009387] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:17:37,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116846448] [2022-04-05 06:17:37,354 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-05 06:17:37,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:17:37,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:17:37,355 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:17:37,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-04-05 06:17:37,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:17:37,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-05 06:17:37,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:17:37,571 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-04-05 06:17:37,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:17:37,642 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-04-05 06:17:37,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116846448] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:17:37,643 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:17:37,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 22 [2022-04-05 06:17:37,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658280735] [2022-04-05 06:17:37,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:17:37,643 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-05 06:17:37,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:17:37,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-05 06:17:37,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=307, Unknown=0, NotChecked=0, Total=462 [2022-04-05 06:17:37,644 INFO L87 Difference]: Start difference. First operand 926 states and 1037 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 states have internal predecessors, (56), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:17:38,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:17:38,411 INFO L93 Difference]: Finished difference Result 1404 states and 1549 transitions. [2022-04-05 06:17:38,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-05 06:17:38,411 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 states have internal predecessors, (56), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 56 [2022-04-05 06:17:38,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:17:38,419 INFO L225 Difference]: With dead ends: 1404 [2022-04-05 06:17:38,419 INFO L226 Difference]: Without dead ends: 925 [2022-04-05 06:17:38,424 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=764, Invalid=1686, Unknown=0, NotChecked=0, Total=2450 [2022-04-05 06:17:38,425 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 103 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 06:17:38,425 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 74 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 06:17:38,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2022-04-05 06:17:38,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 917. [2022-04-05 06:17:38,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 917 states, 803 states have (on average 1.13200498132005) internal successors, (909), 873 states have internal predecessors, (909), 40 states have call successors, (40), 5 states have call predecessors, (40), 73 states have return successors, (73), 38 states have call predecessors, (73), 38 states have call successors, (73) [2022-04-05 06:17:38,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 1022 transitions. [2022-04-05 06:17:38,739 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 1022 transitions. Word has length 56 [2022-04-05 06:17:38,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:17:38,739 INFO L478 AbstractCegarLoop]: Abstraction has 917 states and 1022 transitions. [2022-04-05 06:17:38,739 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 states have internal predecessors, (56), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:17:38,739 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 1022 transitions. [2022-04-05 06:17:38,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-04-05 06:17:38,745 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:17:38,745 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:17:38,768 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-04-05 06:17:38,946 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2022-04-05 06:17:38,946 INFO L403 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:17:38,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:17:38,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1442036278, now seen corresponding path program 80 times [2022-04-05 06:17:38,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:17:38,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543774171] [2022-04-05 06:17:38,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:17:38,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:17:38,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:17:38,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:17:38,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:17:38,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:17:38,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:17:38,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-05 06:17:38,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:17:39,045 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-04-05 06:17:39,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:17:39,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543774171] [2022-04-05 06:17:39,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543774171] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:17:39,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528289463] [2022-04-05 06:17:39,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 06:17:39,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:17:39,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:17:39,047 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:17:39,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-04-05 06:17:39,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 06:17:39,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:17:39,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-05 06:17:39,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:17:39,263 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-04-05 06:17:39,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:17:39,350 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-04-05 06:17:39,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528289463] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:17:39,350 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:17:39,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 22 [2022-04-05 06:17:39,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609124822] [2022-04-05 06:17:39,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:17:39,350 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-05 06:17:39,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:17:39,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-05 06:17:39,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=307, Unknown=0, NotChecked=0, Total=462 [2022-04-05 06:17:39,351 INFO L87 Difference]: Start difference. First operand 917 states and 1022 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-05 06:17:40,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:17:40,152 INFO L93 Difference]: Finished difference Result 967 states and 1082 transitions. [2022-04-05 06:17:40,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-05 06:17:40,152 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 56 [2022-04-05 06:17:40,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:17:40,156 INFO L225 Difference]: With dead ends: 967 [2022-04-05 06:17:40,156 INFO L226 Difference]: Without dead ends: 928 [2022-04-05 06:17:40,161 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=764, Invalid=1686, Unknown=0, NotChecked=0, Total=2450 [2022-04-05 06:17:40,162 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 91 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 06:17:40,162 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 84 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 06:17:40,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2022-04-05 06:17:40,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 928. [2022-04-05 06:17:40,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 814 states have (on average 1.1302211302211302) internal successors, (920), 884 states have internal predecessors, (920), 40 states have call successors, (40), 5 states have call predecessors, (40), 73 states have return successors, (73), 38 states have call predecessors, (73), 38 states have call successors, (73) [2022-04-05 06:17:40,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 1033 transitions. [2022-04-05 06:17:40,491 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 1033 transitions. Word has length 56 [2022-04-05 06:17:40,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:17:40,491 INFO L478 AbstractCegarLoop]: Abstraction has 928 states and 1033 transitions. [2022-04-05 06:17:40,491 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-05 06:17:40,491 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 1033 transitions. [2022-04-05 06:17:40,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-05 06:17:40,497 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:17:40,497 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:17:40,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-04-05 06:17:40,698 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-04-05 06:17:40,698 INFO L403 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:17:40,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:17:40,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1590562, now seen corresponding path program 81 times [2022-04-05 06:17:40,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:17:40,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555184293] [2022-04-05 06:17:40,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:17:40,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:17:40,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:17:40,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:17:40,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:17:40,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:17:40,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:17:40,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-05 06:17:40,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:17:41,297 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 06:17:41,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:17:41,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555184293] [2022-04-05 06:17:41,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555184293] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:17:41,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909375209] [2022-04-05 06:17:41,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 06:17:41,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:17:41,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:17:41,299 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:17:41,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-04-05 06:17:41,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-04-05 06:17:41,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:17:41,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 71 conjunts are in the unsatisfiable core [2022-04-05 06:17:41,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:17:41,740 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 06:17:41,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:17:41,975 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 06:17:41,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909375209] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:17:41,975 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:17:41,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 45 [2022-04-05 06:17:41,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648965581] [2022-04-05 06:17:41,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:17:41,976 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-04-05 06:17:41,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:17:41,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-04-05 06:17:41,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1883, Unknown=0, NotChecked=0, Total=1980 [2022-04-05 06:17:41,977 INFO L87 Difference]: Start difference. First operand 928 states and 1033 transitions. Second operand has 45 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 39 states have internal predecessors, (57), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:17:45,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:17:45,083 INFO L93 Difference]: Finished difference Result 1052 states and 1172 transitions. [2022-04-05 06:17:45,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-05 06:17:45,084 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 39 states have internal predecessors, (57), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 57 [2022-04-05 06:17:45,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:17:45,090 INFO L225 Difference]: With dead ends: 1052 [2022-04-05 06:17:45,090 INFO L226 Difference]: Without dead ends: 1046 [2022-04-05 06:17:45,100 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 108 SyntacticMatches, 5 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=277, Invalid=6365, Unknown=0, NotChecked=0, Total=6642 [2022-04-05 06:17:45,101 INFO L913 BasicCegarLoop]: 126 mSDtfsCounter, 272 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 7390 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 7448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 7390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-04-05 06:17:45,101 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 318 Invalid, 7448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 7390 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-04-05 06:17:45,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1046 states. [2022-04-05 06:17:45,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1046 to 944. [2022-04-05 06:17:45,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 944 states, 827 states have (on average 1.1305925030229746) internal successors, (935), 899 states have internal predecessors, (935), 41 states have call successors, (41), 5 states have call predecessors, (41), 75 states have return successors, (76), 39 states have call predecessors, (76), 39 states have call successors, (76) [2022-04-05 06:17:45,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 1052 transitions. [2022-04-05 06:17:45,442 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 1052 transitions. Word has length 57 [2022-04-05 06:17:45,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:17:45,442 INFO L478 AbstractCegarLoop]: Abstraction has 944 states and 1052 transitions. [2022-04-05 06:17:45,442 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 39 states have internal predecessors, (57), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:17:45,442 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 1052 transitions. [2022-04-05 06:17:45,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-05 06:17:45,448 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:17:45,448 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:17:45,465 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-04-05 06:17:45,649 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:17:45,649 INFO L403 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:17:45,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:17:45,649 INFO L85 PathProgramCache]: Analyzing trace with hash 909467431, now seen corresponding path program 82 times [2022-04-05 06:17:45,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:17:45,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554101646] [2022-04-05 06:17:45,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:17:45,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:17:45,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:17:45,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:17:45,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:17:45,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:17:45,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:17:45,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-05 06:17:45,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:17:46,176 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-05 06:17:46,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:17:46,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554101646] [2022-04-05 06:17:46,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554101646] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:17:46,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696865295] [2022-04-05 06:17:46,176 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 06:17:46,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:17:46,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:17:46,178 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:17:46,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-04-05 06:17:46,270 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 06:17:46,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:17:46,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 67 conjunts are in the unsatisfiable core [2022-04-05 06:17:46,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:17:46,665 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-05 06:17:46,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:17:46,918 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-05 06:17:46,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696865295] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:17:46,918 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:17:46,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 45 [2022-04-05 06:17:46,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618716187] [2022-04-05 06:17:46,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:17:46,919 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-04-05 06:17:46,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:17:46,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-04-05 06:17:46,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1879, Unknown=0, NotChecked=0, Total=1980 [2022-04-05 06:17:46,919 INFO L87 Difference]: Start difference. First operand 944 states and 1052 transitions. Second operand has 45 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 39 states have internal predecessors, (57), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:17:49,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:17:49,568 INFO L93 Difference]: Finished difference Result 950 states and 1057 transitions. [2022-04-05 06:17:49,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-05 06:17:49,568 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 39 states have internal predecessors, (57), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 57 [2022-04-05 06:17:49,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:17:49,572 INFO L225 Difference]: With dead ends: 950 [2022-04-05 06:17:49,572 INFO L226 Difference]: Without dead ends: 928 [2022-04-05 06:17:49,577 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 102 SyntacticMatches, 9 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 914 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=279, Invalid=6041, Unknown=0, NotChecked=0, Total=6320 [2022-04-05 06:17:49,578 INFO L913 BasicCegarLoop]: 114 mSDtfsCounter, 198 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 6605 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 6645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 6605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-04-05 06:17:49,578 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 306 Invalid, 6645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 6605 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-04-05 06:17:49,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2022-04-05 06:17:49,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 928. [2022-04-05 06:17:49,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 814 states have (on average 1.1302211302211302) internal successors, (920), 884 states have internal predecessors, (920), 40 states have call successors, (40), 5 states have call predecessors, (40), 73 states have return successors, (74), 38 states have call predecessors, (74), 38 states have call successors, (74) [2022-04-05 06:17:49,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 1034 transitions. [2022-04-05 06:17:49,889 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 1034 transitions. Word has length 57 [2022-04-05 06:17:49,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:17:49,889 INFO L478 AbstractCegarLoop]: Abstraction has 928 states and 1034 transitions. [2022-04-05 06:17:49,889 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 39 states have internal predecessors, (57), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:17:49,890 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 1034 transitions. [2022-04-05 06:17:49,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-05 06:17:49,895 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:17:49,895 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:17:49,912 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-04-05 06:17:50,095 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2022-04-05 06:17:50,096 INFO L403 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:17:50,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:17:50,096 INFO L85 PathProgramCache]: Analyzing trace with hash 108618946, now seen corresponding path program 83 times [2022-04-05 06:17:50,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:17:50,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320271638] [2022-04-05 06:17:50,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:17:50,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:17:50,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:17:50,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:17:50,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:17:50,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:17:50,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:17:50,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-05 06:17:50,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:17:50,565 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 06:17:50,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:17:50,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320271638] [2022-04-05 06:17:50,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320271638] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:17:50,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22445473] [2022-04-05 06:17:50,566 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 06:17:50,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:17:50,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:17:50,567 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:17:50,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-04-05 06:17:50,650 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-04-05 06:17:50,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:17:50,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 63 conjunts are in the unsatisfiable core [2022-04-05 06:17:50,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:17:51,108 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 06:17:51,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:17:51,379 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 06:17:51,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22445473] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:17:51,380 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:17:51,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 45 [2022-04-05 06:17:51,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823171237] [2022-04-05 06:17:51,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:17:51,380 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-04-05 06:17:51,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:17:51,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-04-05 06:17:51,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1875, Unknown=0, NotChecked=0, Total=1980 [2022-04-05 06:17:51,381 INFO L87 Difference]: Start difference. First operand 928 states and 1034 transitions. Second operand has 45 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 39 states have internal predecessors, (57), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:17:53,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:17:53,665 INFO L93 Difference]: Finished difference Result 934 states and 1039 transitions. [2022-04-05 06:17:53,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-05 06:17:53,665 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 39 states have internal predecessors, (57), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 57 [2022-04-05 06:17:53,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:17:53,668 INFO L225 Difference]: With dead ends: 934 [2022-04-05 06:17:53,669 INFO L226 Difference]: Without dead ends: 910 [2022-04-05 06:17:53,673 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 100 SyntacticMatches, 9 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 919 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=281, Invalid=5725, Unknown=0, NotChecked=0, Total=6006 [2022-04-05 06:17:53,673 INFO L913 BasicCegarLoop]: 94 mSDtfsCounter, 163 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 5335 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 5375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 5335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-05 06:17:53,673 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 281 Invalid, 5375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 5335 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-05 06:17:53,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2022-04-05 06:17:53,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 910. [2022-04-05 06:17:53,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 910 states, 799 states have (on average 1.130162703379224) internal successors, (903), 867 states have internal predecessors, (903), 39 states have call successors, (39), 5 states have call predecessors, (39), 71 states have return successors, (72), 37 states have call predecessors, (72), 37 states have call successors, (72) [2022-04-05 06:17:53,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 910 states to 910 states and 1014 transitions. [2022-04-05 06:17:53,980 INFO L78 Accepts]: Start accepts. Automaton has 910 states and 1014 transitions. Word has length 57 [2022-04-05 06:17:53,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:17:53,980 INFO L478 AbstractCegarLoop]: Abstraction has 910 states and 1014 transitions. [2022-04-05 06:17:53,980 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 39 states have internal predecessors, (57), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:17:53,980 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states and 1014 transitions. [2022-04-05 06:17:53,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-05 06:17:53,986 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:17:53,986 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:17:54,003 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-04-05 06:17:54,187 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:17:54,187 INFO L403 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:17:54,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:17:54,187 INFO L85 PathProgramCache]: Analyzing trace with hash -851422329, now seen corresponding path program 84 times [2022-04-05 06:17:54,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:17:54,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662932422] [2022-04-05 06:17:54,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:17:54,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:17:54,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:17:54,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:17:54,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:17:54,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:17:54,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:17:54,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-05 06:17:54,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:17:54,660 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-05 06:17:54,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:17:54,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662932422] [2022-04-05 06:17:54,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662932422] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:17:54,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567665990] [2022-04-05 06:17:54,661 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-05 06:17:54,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:17:54,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:17:54,661 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:17:54,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-04-05 06:17:54,745 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-05 06:17:54,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:17:54,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 59 conjunts are in the unsatisfiable core [2022-04-05 06:17:54,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:17:55,252 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-05 06:17:55,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:17:55,478 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-05 06:17:55,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567665990] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:17:55,479 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:17:55,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 45 [2022-04-05 06:17:55,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646256165] [2022-04-05 06:17:55,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:17:55,479 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-04-05 06:17:55,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:17:55,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-04-05 06:17:55,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1871, Unknown=0, NotChecked=0, Total=1980 [2022-04-05 06:17:55,480 INFO L87 Difference]: Start difference. First operand 910 states and 1014 transitions. Second operand has 45 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 39 states have internal predecessors, (57), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:17:57,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:17:57,331 INFO L93 Difference]: Finished difference Result 916 states and 1019 transitions. [2022-04-05 06:17:57,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-05 06:17:57,332 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 39 states have internal predecessors, (57), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 57 [2022-04-05 06:17:57,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:17:57,335 INFO L225 Difference]: With dead ends: 916 [2022-04-05 06:17:57,335 INFO L226 Difference]: Without dead ends: 890 [2022-04-05 06:17:57,339 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 98 SyntacticMatches, 9 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=283, Invalid=5417, Unknown=0, NotChecked=0, Total=5700 [2022-04-05 06:17:57,339 INFO L913 BasicCegarLoop]: 74 mSDtfsCounter, 126 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 4020 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 4058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 4020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-05 06:17:57,340 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 251 Invalid, 4058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 4020 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-05 06:17:57,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2022-04-05 06:17:57,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 890. [2022-04-05 06:17:57,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 782 states have (on average 1.1304347826086956) internal successors, (884), 848 states have internal predecessors, (884), 38 states have call successors, (38), 5 states have call predecessors, (38), 69 states have return successors, (70), 36 states have call predecessors, (70), 36 states have call successors, (70) [2022-04-05 06:17:57,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 992 transitions. [2022-04-05 06:17:57,640 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 992 transitions. Word has length 57 [2022-04-05 06:17:57,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:17:57,640 INFO L478 AbstractCegarLoop]: Abstraction has 890 states and 992 transitions. [2022-04-05 06:17:57,641 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 39 states have internal predecessors, (57), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:17:57,641 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 992 transitions. [2022-04-05 06:17:57,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-05 06:17:57,647 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:17:57,647 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:17:57,664 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-04-05 06:17:57,847 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:17:57,848 INFO L403 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:17:57,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:17:57,848 INFO L85 PathProgramCache]: Analyzing trace with hash 637590626, now seen corresponding path program 85 times [2022-04-05 06:17:57,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:17:57,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170934026] [2022-04-05 06:17:57,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:17:57,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:17:57,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:17:57,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:17:57,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:17:57,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:17:57,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:17:58,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-05 06:17:58,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:17:58,251 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-05 06:17:58,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:17:58,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170934026] [2022-04-05 06:17:58,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170934026] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:17:58,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307424805] [2022-04-05 06:17:58,252 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-05 06:17:58,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:17:58,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:17:58,253 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:17:58,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-04-05 06:17:58,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:17:58,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-05 06:17:58,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:17:58,881 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-05 06:17:58,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:17:59,101 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-05 06:17:59,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307424805] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:17:59,101 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:17:59,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 45 [2022-04-05 06:17:59,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57410355] [2022-04-05 06:17:59,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:17:59,102 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-04-05 06:17:59,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:17:59,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-04-05 06:17:59,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1867, Unknown=0, NotChecked=0, Total=1980 [2022-04-05 06:17:59,102 INFO L87 Difference]: Start difference. First operand 890 states and 992 transitions. Second operand has 45 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 39 states have internal predecessors, (57), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:18:00,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:18:00,672 INFO L93 Difference]: Finished difference Result 896 states and 997 transitions. [2022-04-05 06:18:00,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-05 06:18:00,683 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 39 states have internal predecessors, (57), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 57 [2022-04-05 06:18:00,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:18:00,687 INFO L225 Difference]: With dead ends: 896 [2022-04-05 06:18:00,687 INFO L226 Difference]: Without dead ends: 868 [2022-04-05 06:18:00,691 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 96 SyntacticMatches, 9 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=285, Invalid=5117, Unknown=0, NotChecked=0, Total=5402 [2022-04-05 06:18:00,691 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 91 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 3059 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 3095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 3059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-05 06:18:00,691 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 236 Invalid, 3095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 3059 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-05 06:18:00,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2022-04-05 06:18:00,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 868. [2022-04-05 06:18:00,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 763 states have (on average 1.1310615989515072) internal successors, (863), 827 states have internal predecessors, (863), 37 states have call successors, (37), 5 states have call predecessors, (37), 67 states have return successors, (68), 35 states have call predecessors, (68), 35 states have call successors, (68) [2022-04-05 06:18:00,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 968 transitions. [2022-04-05 06:18:00,965 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 968 transitions. Word has length 57 [2022-04-05 06:18:00,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:18:00,966 INFO L478 AbstractCegarLoop]: Abstraction has 868 states and 968 transitions. [2022-04-05 06:18:00,966 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 39 states have internal predecessors, (57), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:18:00,966 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 968 transitions. [2022-04-05 06:18:00,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-05 06:18:00,971 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:18:00,971 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:18:00,987 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-04-05 06:18:01,171 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:18:01,171 INFO L403 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:18:01,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:18:01,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1668804583, now seen corresponding path program 86 times [2022-04-05 06:18:01,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:18:01,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131248595] [2022-04-05 06:18:01,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:18:01,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:18:01,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:01,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:18:01,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:01,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:18:01,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:01,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-05 06:18:01,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:01,528 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-05 06:18:01,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:18:01,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131248595] [2022-04-05 06:18:01,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131248595] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:18:01,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477315847] [2022-04-05 06:18:01,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 06:18:01,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:18:01,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:18:01,530 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:18:01,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-04-05 06:18:01,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 06:18:01,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:18:01,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 51 conjunts are in the unsatisfiable core [2022-04-05 06:18:01,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:18:02,230 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-05 06:18:02,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:18:02,465 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-05 06:18:02,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477315847] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:18:02,465 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:18:02,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 45 [2022-04-05 06:18:02,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454600904] [2022-04-05 06:18:02,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:18:02,466 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-04-05 06:18:02,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:18:02,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-04-05 06:18:02,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1863, Unknown=0, NotChecked=0, Total=1980 [2022-04-05 06:18:02,466 INFO L87 Difference]: Start difference. First operand 868 states and 968 transitions. Second operand has 45 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 39 states have internal predecessors, (57), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:18:03,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:18:03,583 INFO L93 Difference]: Finished difference Result 886 states and 989 transitions. [2022-04-05 06:18:03,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-05 06:18:03,583 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 39 states have internal predecessors, (57), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 57 [2022-04-05 06:18:03,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:18:03,588 INFO L225 Difference]: With dead ends: 886 [2022-04-05 06:18:03,588 INFO L226 Difference]: Without dead ends: 880 [2022-04-05 06:18:03,592 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 94 SyntacticMatches, 9 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 934 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=287, Invalid=4825, Unknown=0, NotChecked=0, Total=5112 [2022-04-05 06:18:03,592 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 55 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 1602 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 1638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-05 06:18:03,592 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 171 Invalid, 1638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1602 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-05 06:18:03,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2022-04-05 06:18:03,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 878. [2022-04-05 06:18:03,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 770 states have (on average 1.1324675324675324) internal successors, (872), 836 states have internal predecessors, (872), 38 states have call successors, (38), 5 states have call predecessors, (38), 69 states have return successors, (71), 36 states have call predecessors, (71), 36 states have call successors, (71) [2022-04-05 06:18:03,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 981 transitions. [2022-04-05 06:18:03,884 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 981 transitions. Word has length 57 [2022-04-05 06:18:03,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:18:03,884 INFO L478 AbstractCegarLoop]: Abstraction has 878 states and 981 transitions. [2022-04-05 06:18:03,884 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 39 states have internal predecessors, (57), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:18:03,884 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 981 transitions. [2022-04-05 06:18:03,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-05 06:18:03,889 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:18:03,889 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:18:03,908 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2022-04-05 06:18:04,090 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:18:04,090 INFO L403 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:18:04,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:18:04,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1918681885, now seen corresponding path program 87 times [2022-04-05 06:18:04,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:18:04,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655799798] [2022-04-05 06:18:04,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:18:04,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:18:04,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:04,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:18:04,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:04,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:18:04,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:04,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-05 06:18:04,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:04,538 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:18:04,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:18:04,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655799798] [2022-04-05 06:18:04,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655799798] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:18:04,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585390493] [2022-04-05 06:18:04,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 06:18:04,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:18:04,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:18:04,539 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:18:04,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-04-05 06:18:04,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-04-05 06:18:04,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:18:04,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-05 06:18:04,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:18:05,524 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:18:05,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:18:06,771 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:18:06,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585390493] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:18:06,771 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:18:06,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 29, 29] total 79 [2022-04-05 06:18:06,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165223095] [2022-04-05 06:18:06,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:18:06,772 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-04-05 06:18:06,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:18:06,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-04-05 06:18:06,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=5898, Unknown=0, NotChecked=0, Total=6162 [2022-04-05 06:18:06,773 INFO L87 Difference]: Start difference. First operand 878 states and 981 transitions. Second operand has 79 states, 79 states have (on average 1.4177215189873418) internal successors, (112), 78 states have internal predecessors, (112), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:18:12,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:18:12,367 INFO L93 Difference]: Finished difference Result 996 states and 1120 transitions. [2022-04-05 06:18:12,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-04-05 06:18:12,367 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.4177215189873418) internal successors, (112), 78 states have internal predecessors, (112), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 58 [2022-04-05 06:18:12,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:18:12,391 INFO L225 Difference]: With dead ends: 996 [2022-04-05 06:18:12,392 INFO L226 Difference]: Without dead ends: 982 [2022-04-05 06:18:12,397 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2318 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=958, Invalid=15044, Unknown=0, NotChecked=0, Total=16002 [2022-04-05 06:18:12,397 INFO L913 BasicCegarLoop]: 134 mSDtfsCounter, 1785 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 8227 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1790 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 8423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 8227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-04-05 06:18:12,397 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1790 Valid, 341 Invalid, 8423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 8227 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-04-05 06:18:12,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2022-04-05 06:18:12,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 973. [2022-04-05 06:18:12,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 973 states, 853 states have (on average 1.1313012895662369) internal successors, (965), 927 states have internal predecessors, (965), 42 states have call successors, (42), 5 states have call predecessors, (42), 77 states have return successors, (83), 40 states have call predecessors, (83), 40 states have call successors, (83) [2022-04-05 06:18:12,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 973 states to 973 states and 1090 transitions. [2022-04-05 06:18:12,724 INFO L78 Accepts]: Start accepts. Automaton has 973 states and 1090 transitions. Word has length 58 [2022-04-05 06:18:12,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:18:12,724 INFO L478 AbstractCegarLoop]: Abstraction has 973 states and 1090 transitions. [2022-04-05 06:18:12,724 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.4177215189873418) internal successors, (112), 78 states have internal predecessors, (112), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:18:12,724 INFO L276 IsEmpty]: Start isEmpty. Operand 973 states and 1090 transitions. [2022-04-05 06:18:12,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-05 06:18:12,731 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:18:12,731 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:18:12,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-04-05 06:18:12,931 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:18:12,932 INFO L403 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:18:12,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:18:12,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1021501843, now seen corresponding path program 88 times [2022-04-05 06:18:12,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:18:12,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967916237] [2022-04-05 06:18:12,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:18:12,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:18:12,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:12,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:18:12,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:12,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:18:12,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:13,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-05 06:18:13,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:13,402 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:18:13,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:18:13,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967916237] [2022-04-05 06:18:13,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967916237] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:18:13,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284619244] [2022-04-05 06:18:13,402 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 06:18:13,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:18:13,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:18:13,403 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:18:13,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-04-05 06:18:13,487 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 06:18:13,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:18:13,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-05 06:18:13,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:18:14,340 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:18:14,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:18:15,525 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:18:15,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284619244] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:18:15,525 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:18:15,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 29, 29] total 79 [2022-04-05 06:18:15,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636778692] [2022-04-05 06:18:15,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:18:15,526 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-04-05 06:18:15,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:18:15,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-04-05 06:18:15,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=5898, Unknown=0, NotChecked=0, Total=6162 [2022-04-05 06:18:15,527 INFO L87 Difference]: Start difference. First operand 973 states and 1090 transitions. Second operand has 79 states, 79 states have (on average 1.4177215189873418) internal successors, (112), 78 states have internal predecessors, (112), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:18:21,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:18:21,404 INFO L93 Difference]: Finished difference Result 988 states and 1105 transitions. [2022-04-05 06:18:21,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-04-05 06:18:21,404 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.4177215189873418) internal successors, (112), 78 states have internal predecessors, (112), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 58 [2022-04-05 06:18:21,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:18:21,408 INFO L225 Difference]: With dead ends: 988 [2022-04-05 06:18:21,408 INFO L226 Difference]: Without dead ends: 976 [2022-04-05 06:18:21,414 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2333 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=958, Invalid=15044, Unknown=0, NotChecked=0, Total=16002 [2022-04-05 06:18:21,414 INFO L913 BasicCegarLoop]: 136 mSDtfsCounter, 1772 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 8865 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1795 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 9040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 8865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-04-05 06:18:21,414 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1795 Valid, 373 Invalid, 9040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 8865 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-04-05 06:18:21,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2022-04-05 06:18:21,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 974. [2022-04-05 06:18:21,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 974 states, 854 states have (on average 1.1311475409836065) internal successors, (966), 928 states have internal predecessors, (966), 42 states have call successors, (42), 5 states have call predecessors, (42), 77 states have return successors, (78), 40 states have call predecessors, (78), 40 states have call successors, (78) [2022-04-05 06:18:21,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974 states to 974 states and 1086 transitions. [2022-04-05 06:18:21,770 INFO L78 Accepts]: Start accepts. Automaton has 974 states and 1086 transitions. Word has length 58 [2022-04-05 06:18:21,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:18:21,770 INFO L478 AbstractCegarLoop]: Abstraction has 974 states and 1086 transitions. [2022-04-05 06:18:21,770 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.4177215189873418) internal successors, (112), 78 states have internal predecessors, (112), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:18:21,770 INFO L276 IsEmpty]: Start isEmpty. Operand 974 states and 1086 transitions. [2022-04-05 06:18:21,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-05 06:18:21,777 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:18:21,777 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:18:21,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-04-05 06:18:21,977 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2022-04-05 06:18:21,977 INFO L403 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:18:21,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:18:21,977 INFO L85 PathProgramCache]: Analyzing trace with hash 108687446, now seen corresponding path program 89 times [2022-04-05 06:18:21,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:18:21,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352974633] [2022-04-05 06:18:21,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:18:21,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:18:21,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:21,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:18:21,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:21,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:18:21,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:21,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-05 06:18:21,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:22,091 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-04-05 06:18:22,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:18:22,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352974633] [2022-04-05 06:18:22,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352974633] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:18:22,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418644198] [2022-04-05 06:18:22,092 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 06:18:22,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:18:22,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:18:22,093 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:18:22,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-04-05 06:18:22,190 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-04-05 06:18:22,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:18:22,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-05 06:18:22,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:18:22,337 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-04-05 06:18:22,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:18:22,423 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-04-05 06:18:22,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418644198] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:18:22,423 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:18:22,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 24 [2022-04-05 06:18:22,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920047232] [2022-04-05 06:18:22,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:18:22,423 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-05 06:18:22,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:18:22,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-05 06:18:22,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2022-04-05 06:18:22,424 INFO L87 Difference]: Start difference. First operand 974 states and 1086 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-05 06:18:23,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:18:23,323 INFO L93 Difference]: Finished difference Result 1174 states and 1323 transitions. [2022-04-05 06:18:23,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-05 06:18:23,323 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 58 [2022-04-05 06:18:23,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:18:23,327 INFO L225 Difference]: With dead ends: 1174 [2022-04-05 06:18:23,327 INFO L226 Difference]: Without dead ends: 1120 [2022-04-05 06:18:23,334 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=856, Invalid=2566, Unknown=0, NotChecked=0, Total=3422 [2022-04-05 06:18:23,334 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 205 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 06:18:23,334 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 74 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 06:18:23,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2022-04-05 06:18:23,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 1084. [2022-04-05 06:18:23,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1084 states, 964 states have (on average 1.129668049792531) internal successors, (1089), 1038 states have internal predecessors, (1089), 42 states have call successors, (42), 5 states have call predecessors, (42), 77 states have return successors, (78), 40 states have call predecessors, (78), 40 states have call successors, (78) [2022-04-05 06:18:23,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1084 states to 1084 states and 1209 transitions. [2022-04-05 06:18:23,750 INFO L78 Accepts]: Start accepts. Automaton has 1084 states and 1209 transitions. Word has length 58 [2022-04-05 06:18:23,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:18:23,751 INFO L478 AbstractCegarLoop]: Abstraction has 1084 states and 1209 transitions. [2022-04-05 06:18:23,751 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-05 06:18:23,751 INFO L276 IsEmpty]: Start isEmpty. Operand 1084 states and 1209 transitions. [2022-04-05 06:18:23,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-05 06:18:23,758 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:18:23,759 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:18:23,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-04-05 06:18:23,959 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2022-04-05 06:18:23,959 INFO L403 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:18:23,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:18:23,959 INFO L85 PathProgramCache]: Analyzing trace with hash -127636287, now seen corresponding path program 90 times [2022-04-05 06:18:23,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:18:23,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23513839] [2022-04-05 06:18:23,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:18:23,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:18:23,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:23,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:18:23,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:23,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:18:23,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:24,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-05 06:18:24,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:24,053 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-04-05 06:18:24,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:18:24,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23513839] [2022-04-05 06:18:24,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23513839] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:18:24,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957477779] [2022-04-05 06:18:24,053 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-05 06:18:24,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:18:24,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:18:24,054 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:18:24,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-04-05 06:18:24,143 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-05 06:18:24,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:18:24,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-05 06:18:24,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:18:24,280 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-04-05 06:18:24,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:18:24,349 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-04-05 06:18:24,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957477779] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:18:24,349 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:18:24,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 24 [2022-04-05 06:18:24,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66478270] [2022-04-05 06:18:24,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:18:24,350 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-05 06:18:24,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:18:24,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-05 06:18:24,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2022-04-05 06:18:24,350 INFO L87 Difference]: Start difference. First operand 1084 states and 1209 transitions. Second operand has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:18:25,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:18:25,333 INFO L93 Difference]: Finished difference Result 1860 states and 2065 transitions. [2022-04-05 06:18:25,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-05 06:18:25,333 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 58 [2022-04-05 06:18:25,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:18:25,349 INFO L225 Difference]: With dead ends: 1860 [2022-04-05 06:18:25,349 INFO L226 Difference]: Without dead ends: 1230 [2022-04-05 06:18:25,374 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=856, Invalid=2566, Unknown=0, NotChecked=0, Total=3422 [2022-04-05 06:18:25,374 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 169 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 06:18:25,374 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 79 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 06:18:25,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1230 states. [2022-04-05 06:18:25,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1230 to 1194. [2022-04-05 06:18:25,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1194 states, 1074 states have (on average 1.1284916201117319) internal successors, (1212), 1148 states have internal predecessors, (1212), 42 states have call successors, (42), 5 states have call predecessors, (42), 77 states have return successors, (78), 40 states have call predecessors, (78), 40 states have call successors, (78) [2022-04-05 06:18:25,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1194 states to 1194 states and 1332 transitions. [2022-04-05 06:18:25,850 INFO L78 Accepts]: Start accepts. Automaton has 1194 states and 1332 transitions. Word has length 58 [2022-04-05 06:18:25,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:18:25,851 INFO L478 AbstractCegarLoop]: Abstraction has 1194 states and 1332 transitions. [2022-04-05 06:18:25,851 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:18:25,851 INFO L276 IsEmpty]: Start isEmpty. Operand 1194 states and 1332 transitions. [2022-04-05 06:18:25,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-05 06:18:25,860 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:18:25,860 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:18:25,877 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-04-05 06:18:26,060 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2022-04-05 06:18:26,060 INFO L403 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:18:26,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:18:26,061 INFO L85 PathProgramCache]: Analyzing trace with hash -823806772, now seen corresponding path program 91 times [2022-04-05 06:18:26,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:18:26,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421132686] [2022-04-05 06:18:26,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:18:26,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:18:26,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:26,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:18:26,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:26,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:18:26,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:26,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-05 06:18:26,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:26,672 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 06:18:26,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:18:26,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421132686] [2022-04-05 06:18:26,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421132686] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:18:26,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893924852] [2022-04-05 06:18:26,672 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-05 06:18:26,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:18:26,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:18:26,673 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:18:26,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-04-05 06:18:26,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:26,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 75 conjunts are in the unsatisfiable core [2022-04-05 06:18:26,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:18:27,092 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 06:18:27,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:18:27,320 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 06:18:27,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893924852] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:18:27,321 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:18:27,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 47 [2022-04-05 06:18:27,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869270025] [2022-04-05 06:18:27,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:18:27,321 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-04-05 06:18:27,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:18:27,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-04-05 06:18:27,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=2061, Unknown=0, NotChecked=0, Total=2162 [2022-04-05 06:18:27,322 INFO L87 Difference]: Start difference. First operand 1194 states and 1332 transitions. Second operand has 47 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 41 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:18:30,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:18:30,691 INFO L93 Difference]: Finished difference Result 1336 states and 1491 transitions. [2022-04-05 06:18:30,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-04-05 06:18:30,692 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 41 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 59 [2022-04-05 06:18:30,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:18:30,699 INFO L225 Difference]: With dead ends: 1336 [2022-04-05 06:18:30,699 INFO L226 Difference]: Without dead ends: 1330 [2022-04-05 06:18:30,706 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 112 SyntacticMatches, 5 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 982 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=289, Invalid=7021, Unknown=0, NotChecked=0, Total=7310 [2022-04-05 06:18:30,706 INFO L913 BasicCegarLoop]: 138 mSDtfsCounter, 296 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 8072 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 8132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 8072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-04-05 06:18:30,706 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 330 Invalid, 8132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 8072 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-04-05 06:18:30,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1330 states. [2022-04-05 06:18:31,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1330 to 1210. [2022-04-05 06:18:31,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1210 states, 1087 states have (on average 1.1287948482060717) internal successors, (1227), 1163 states have internal predecessors, (1227), 43 states have call successors, (43), 5 states have call predecessors, (43), 79 states have return successors, (81), 41 states have call predecessors, (81), 41 states have call successors, (81) [2022-04-05 06:18:31,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1351 transitions. [2022-04-05 06:18:31,211 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1351 transitions. Word has length 59 [2022-04-05 06:18:31,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:18:31,211 INFO L478 AbstractCegarLoop]: Abstraction has 1210 states and 1351 transitions. [2022-04-05 06:18:31,211 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 41 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:18:31,211 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1351 transitions. [2022-04-05 06:18:31,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-05 06:18:31,220 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:18:31,220 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:18:31,236 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-04-05 06:18:31,420 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2022-04-05 06:18:31,420 INFO L403 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:18:31,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:18:31,421 INFO L85 PathProgramCache]: Analyzing trace with hash -513372681, now seen corresponding path program 92 times [2022-04-05 06:18:31,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:18:31,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591080963] [2022-04-05 06:18:31,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:18:31,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:18:31,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:31,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:18:31,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:31,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:18:31,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:31,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-05 06:18:31,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:31,984 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-05 06:18:31,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:18:31,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591080963] [2022-04-05 06:18:31,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591080963] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:18:31,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770591572] [2022-04-05 06:18:31,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 06:18:31,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:18:31,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:18:31,985 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:18:31,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-04-05 06:18:32,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 06:18:32,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:18:32,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 71 conjunts are in the unsatisfiable core [2022-04-05 06:18:32,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:18:32,507 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-05 06:18:32,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:18:32,761 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-05 06:18:32,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770591572] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:18:32,762 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:18:32,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 47 [2022-04-05 06:18:32,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411210533] [2022-04-05 06:18:32,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:18:32,762 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-04-05 06:18:32,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:18:32,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-04-05 06:18:32,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2057, Unknown=0, NotChecked=0, Total=2162 [2022-04-05 06:18:32,763 INFO L87 Difference]: Start difference. First operand 1210 states and 1351 transitions. Second operand has 47 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 41 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:18:36,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:18:36,154 INFO L93 Difference]: Finished difference Result 1216 states and 1356 transitions. [2022-04-05 06:18:36,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-05 06:18:36,155 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 41 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 59 [2022-04-05 06:18:36,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:18:36,160 INFO L225 Difference]: With dead ends: 1216 [2022-04-05 06:18:36,160 INFO L226 Difference]: Without dead ends: 1194 [2022-04-05 06:18:36,166 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 106 SyntacticMatches, 9 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1001 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=291, Invalid=6681, Unknown=0, NotChecked=0, Total=6972 [2022-04-05 06:18:36,166 INFO L913 BasicCegarLoop]: 118 mSDtfsCounter, 223 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 7314 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 7358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 7314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-04-05 06:18:36,166 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 320 Invalid, 7358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 7314 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-04-05 06:18:36,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2022-04-05 06:18:36,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 1194. [2022-04-05 06:18:36,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1194 states, 1074 states have (on average 1.1284916201117319) internal successors, (1212), 1148 states have internal predecessors, (1212), 42 states have call successors, (42), 5 states have call predecessors, (42), 77 states have return successors, (79), 40 states have call predecessors, (79), 40 states have call successors, (79) [2022-04-05 06:18:36,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1194 states to 1194 states and 1333 transitions. [2022-04-05 06:18:36,648 INFO L78 Accepts]: Start accepts. Automaton has 1194 states and 1333 transitions. Word has length 59 [2022-04-05 06:18:36,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:18:36,648 INFO L478 AbstractCegarLoop]: Abstraction has 1194 states and 1333 transitions. [2022-04-05 06:18:36,648 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 41 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:18:36,649 INFO L276 IsEmpty]: Start isEmpty. Operand 1194 states and 1333 transitions. [2022-04-05 06:18:36,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-05 06:18:36,657 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:18:36,657 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:18:36,680 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-04-05 06:18:36,857 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:18:36,857 INFO L403 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:18:36,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:18:36,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1573824044, now seen corresponding path program 93 times [2022-04-05 06:18:36,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:18:36,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671839220] [2022-04-05 06:18:36,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:18:36,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:18:36,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:36,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:18:36,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:36,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:18:36,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:37,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-05 06:18:37,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:37,428 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 06:18:37,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:18:37,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671839220] [2022-04-05 06:18:37,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671839220] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:18:37,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066153736] [2022-04-05 06:18:37,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 06:18:37,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:18:37,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:18:37,429 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:18:37,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-04-05 06:18:37,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-04-05 06:18:37,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:18:37,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 67 conjunts are in the unsatisfiable core [2022-04-05 06:18:37,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:18:38,109 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 06:18:38,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:18:38,423 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 06:18:38,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066153736] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:18:38,423 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:18:38,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 47 [2022-04-05 06:18:38,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069601435] [2022-04-05 06:18:38,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:18:38,424 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-04-05 06:18:38,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:18:38,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-04-05 06:18:38,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2053, Unknown=0, NotChecked=0, Total=2162 [2022-04-05 06:18:38,425 INFO L87 Difference]: Start difference. First operand 1194 states and 1333 transitions. Second operand has 47 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 41 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:18:41,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:18:41,539 INFO L93 Difference]: Finished difference Result 1200 states and 1338 transitions. [2022-04-05 06:18:41,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-05 06:18:41,539 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 41 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 59 [2022-04-05 06:18:41,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:18:41,543 INFO L225 Difference]: With dead ends: 1200 [2022-04-05 06:18:41,543 INFO L226 Difference]: Without dead ends: 1176 [2022-04-05 06:18:41,550 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 104 SyntacticMatches, 9 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1006 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=293, Invalid=6349, Unknown=0, NotChecked=0, Total=6642 [2022-04-05 06:18:41,550 INFO L913 BasicCegarLoop]: 98 mSDtfsCounter, 186 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 5966 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 6010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 5966 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-04-05 06:18:41,550 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 295 Invalid, 6010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 5966 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-04-05 06:18:41,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1176 states. [2022-04-05 06:18:42,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1176 to 1176. [2022-04-05 06:18:42,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1176 states, 1059 states have (on average 1.1284230406043436) internal successors, (1195), 1131 states have internal predecessors, (1195), 41 states have call successors, (41), 5 states have call predecessors, (41), 75 states have return successors, (77), 39 states have call predecessors, (77), 39 states have call successors, (77) [2022-04-05 06:18:42,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 1313 transitions. [2022-04-05 06:18:42,033 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 1313 transitions. Word has length 59 [2022-04-05 06:18:42,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:18:42,034 INFO L478 AbstractCegarLoop]: Abstraction has 1176 states and 1313 transitions. [2022-04-05 06:18:42,034 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 41 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:18:42,034 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 1313 transitions. [2022-04-05 06:18:42,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-05 06:18:42,041 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:18:42,041 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:18:42,057 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-04-05 06:18:42,242 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-04-05 06:18:42,242 INFO L403 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:18:42,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:18:42,242 INFO L85 PathProgramCache]: Analyzing trace with hash 2024949911, now seen corresponding path program 94 times [2022-04-05 06:18:42,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:18:42,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763460849] [2022-04-05 06:18:42,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:18:42,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:18:42,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:42,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:18:42,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:42,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:18:42,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:42,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-05 06:18:42,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:42,744 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-05 06:18:42,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:18:42,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763460849] [2022-04-05 06:18:42,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763460849] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:18:42,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951440496] [2022-04-05 06:18:42,745 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 06:18:42,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:18:42,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:18:42,746 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:18:42,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-04-05 06:18:42,836 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 06:18:42,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:18:42,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 63 conjunts are in the unsatisfiable core [2022-04-05 06:18:42,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:18:43,392 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-05 06:18:43,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:18:43,676 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-05 06:18:43,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951440496] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:18:43,676 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:18:43,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 47 [2022-04-05 06:18:43,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325475526] [2022-04-05 06:18:43,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:18:43,676 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-04-05 06:18:43,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:18:43,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-04-05 06:18:43,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=2049, Unknown=0, NotChecked=0, Total=2162 [2022-04-05 06:18:43,677 INFO L87 Difference]: Start difference. First operand 1176 states and 1313 transitions. Second operand has 47 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 41 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:18:45,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:18:45,947 INFO L93 Difference]: Finished difference Result 1182 states and 1318 transitions. [2022-04-05 06:18:45,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-05 06:18:45,947 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 41 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 59 [2022-04-05 06:18:45,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:18:45,951 INFO L225 Difference]: With dead ends: 1182 [2022-04-05 06:18:45,951 INFO L226 Difference]: Without dead ends: 1156 [2022-04-05 06:18:45,957 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 102 SyntacticMatches, 9 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1011 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=295, Invalid=6025, Unknown=0, NotChecked=0, Total=6320 [2022-04-05 06:18:45,958 INFO L913 BasicCegarLoop]: 78 mSDtfsCounter, 150 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 4693 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 4735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 4693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-05 06:18:45,958 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 270 Invalid, 4735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 4693 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-05 06:18:45,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1156 states. [2022-04-05 06:18:46,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1156 to 1156. [2022-04-05 06:18:46,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1156 states, 1042 states have (on average 1.128598848368522) internal successors, (1176), 1112 states have internal predecessors, (1176), 40 states have call successors, (40), 5 states have call predecessors, (40), 73 states have return successors, (75), 38 states have call predecessors, (75), 38 states have call successors, (75) [2022-04-05 06:18:46,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1156 states to 1156 states and 1291 transitions. [2022-04-05 06:18:46,412 INFO L78 Accepts]: Start accepts. Automaton has 1156 states and 1291 transitions. Word has length 59 [2022-04-05 06:18:46,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:18:46,412 INFO L478 AbstractCegarLoop]: Abstraction has 1156 states and 1291 transitions. [2022-04-05 06:18:46,412 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 41 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:18:46,412 INFO L276 IsEmpty]: Start isEmpty. Operand 1156 states and 1291 transitions. [2022-04-05 06:18:46,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-05 06:18:46,419 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:18:46,419 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:18:46,435 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-04-05 06:18:46,620 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-04-05 06:18:46,620 INFO L403 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:18:46,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:18:46,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1441546356, now seen corresponding path program 95 times [2022-04-05 06:18:46,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:18:46,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077065049] [2022-04-05 06:18:46,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:18:46,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:18:46,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:46,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:18:46,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:46,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:18:46,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:46,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-05 06:18:46,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:47,053 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-05 06:18:47,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:18:47,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077065049] [2022-04-05 06:18:47,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077065049] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:18:47,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510086121] [2022-04-05 06:18:47,054 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 06:18:47,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:18:47,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:18:47,055 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:18:47,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-04-05 06:18:47,147 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-04-05 06:18:47,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:18:47,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 59 conjunts are in the unsatisfiable core [2022-04-05 06:18:47,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:18:47,733 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-05 06:18:47,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:18:47,990 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-05 06:18:47,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510086121] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:18:47,990 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:18:47,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 47 [2022-04-05 06:18:47,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529522522] [2022-04-05 06:18:47,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:18:47,991 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-04-05 06:18:47,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:18:47,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-04-05 06:18:47,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=2045, Unknown=0, NotChecked=0, Total=2162 [2022-04-05 06:18:47,992 INFO L87 Difference]: Start difference. First operand 1156 states and 1291 transitions. Second operand has 47 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 41 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:18:50,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:18:50,310 INFO L93 Difference]: Finished difference Result 1162 states and 1296 transitions. [2022-04-05 06:18:50,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-05 06:18:50,311 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 41 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 59 [2022-04-05 06:18:50,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:18:50,315 INFO L225 Difference]: With dead ends: 1162 [2022-04-05 06:18:50,315 INFO L226 Difference]: Without dead ends: 1134 [2022-04-05 06:18:50,321 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 100 SyntacticMatches, 9 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1016 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=297, Invalid=5709, Unknown=0, NotChecked=0, Total=6006 [2022-04-05 06:18:50,321 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 115 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 3794 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 3834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 3794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-05 06:18:50,321 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 260 Invalid, 3834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 3794 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-05 06:18:50,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1134 states. [2022-04-05 06:18:50,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1134 to 1134. [2022-04-05 06:18:50,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1134 states, 1023 states have (on average 1.1290322580645162) internal successors, (1155), 1091 states have internal predecessors, (1155), 39 states have call successors, (39), 5 states have call predecessors, (39), 71 states have return successors, (73), 37 states have call predecessors, (73), 37 states have call successors, (73) [2022-04-05 06:18:50,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1134 states to 1134 states and 1267 transitions. [2022-04-05 06:18:50,785 INFO L78 Accepts]: Start accepts. Automaton has 1134 states and 1267 transitions. Word has length 59 [2022-04-05 06:18:50,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:18:50,785 INFO L478 AbstractCegarLoop]: Abstraction has 1134 states and 1267 transitions. [2022-04-05 06:18:50,785 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 41 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:18:50,785 INFO L276 IsEmpty]: Start isEmpty. Operand 1134 states and 1267 transitions. [2022-04-05 06:18:50,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-05 06:18:50,792 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:18:50,793 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:18:50,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-04-05 06:18:50,993 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2022-04-05 06:18:50,993 INFO L403 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:18:50,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:18:50,993 INFO L85 PathProgramCache]: Analyzing trace with hash -27180401, now seen corresponding path program 96 times [2022-04-05 06:18:50,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:18:50,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722303372] [2022-04-05 06:18:50,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:18:50,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:18:51,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:51,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:18:51,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:51,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:18:51,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:51,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-05 06:18:51,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:51,291 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-04-05 06:18:51,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:18:51,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722303372] [2022-04-05 06:18:51,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722303372] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:18:51,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049698607] [2022-04-05 06:18:51,292 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-05 06:18:51,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:18:51,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:18:51,293 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:18:51,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-04-05 06:18:51,395 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-05 06:18:51,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:18:51,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-05 06:18:51,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:18:51,851 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-04-05 06:18:51,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:18:52,478 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-04-05 06:18:52,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049698607] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:18:52,478 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:18:52,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 19, 19] total 51 [2022-04-05 06:18:52,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45546059] [2022-04-05 06:18:52,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:18:52,479 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-04-05 06:18:52,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:18:52,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-04-05 06:18:52,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=2370, Unknown=0, NotChecked=0, Total=2550 [2022-04-05 06:18:52,480 INFO L87 Difference]: Start difference. First operand 1134 states and 1267 transitions. Second operand has 51 states, 51 states have (on average 1.4901960784313726) internal successors, (76), 50 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:18:55,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:18:55,277 INFO L93 Difference]: Finished difference Result 1238 states and 1393 transitions. [2022-04-05 06:18:55,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-05 06:18:55,278 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.4901960784313726) internal successors, (76), 50 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 59 [2022-04-05 06:18:55,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:18:55,314 INFO L225 Difference]: With dead ends: 1238 [2022-04-05 06:18:55,314 INFO L226 Difference]: Without dead ends: 1219 [2022-04-05 06:18:55,322 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 89 SyntacticMatches, 5 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=489, Invalid=5673, Unknown=0, NotChecked=0, Total=6162 [2022-04-05 06:18:55,322 INFO L913 BasicCegarLoop]: 95 mSDtfsCounter, 771 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 3379 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 775 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 3461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 3379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-05 06:18:55,322 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [775 Valid, 212 Invalid, 3461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 3379 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-05 06:18:55,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2022-04-05 06:18:55,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 1214. [2022-04-05 06:18:55,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1214 states, 1070 states have (on average 1.122429906542056) internal successors, (1201), 1160 states have internal predecessors, (1201), 50 states have call successors, (50), 5 states have call predecessors, (50), 93 states have return successors, (106), 48 states have call predecessors, (106), 48 states have call successors, (106) [2022-04-05 06:18:55,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1214 states to 1214 states and 1357 transitions. [2022-04-05 06:18:55,791 INFO L78 Accepts]: Start accepts. Automaton has 1214 states and 1357 transitions. Word has length 59 [2022-04-05 06:18:55,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:18:55,791 INFO L478 AbstractCegarLoop]: Abstraction has 1214 states and 1357 transitions. [2022-04-05 06:18:55,792 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.4901960784313726) internal successors, (76), 50 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:18:55,792 INFO L276 IsEmpty]: Start isEmpty. Operand 1214 states and 1357 transitions. [2022-04-05 06:18:55,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-05 06:18:55,800 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:18:55,800 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:18:55,823 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-04-05 06:18:56,000 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2022-04-05 06:18:56,001 INFO L403 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:18:56,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:18:56,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1371986743, now seen corresponding path program 97 times [2022-04-05 06:18:56,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:18:56,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910142067] [2022-04-05 06:18:56,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:18:56,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:18:56,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:56,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:18:56,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:56,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:18:56,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:56,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-05 06:18:56,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:56,392 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-05 06:18:56,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:18:56,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910142067] [2022-04-05 06:18:56,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910142067] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:18:56,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157019195] [2022-04-05 06:18:56,392 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-05 06:18:56,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:18:56,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:18:56,393 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:18:56,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-04-05 06:18:56,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:56,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-05 06:18:56,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:18:57,098 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-05 06:18:57,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:18:57,334 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-05 06:18:57,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157019195] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:18:57,335 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:18:57,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 47 [2022-04-05 06:18:57,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849287541] [2022-04-05 06:18:57,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:18:57,335 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-04-05 06:18:57,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:18:57,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-04-05 06:18:57,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=2041, Unknown=0, NotChecked=0, Total=2162 [2022-04-05 06:18:57,336 INFO L87 Difference]: Start difference. First operand 1214 states and 1357 transitions. Second operand has 47 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 41 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:18:58,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:18:58,864 INFO L93 Difference]: Finished difference Result 1232 states and 1379 transitions. [2022-04-05 06:18:58,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-05 06:18:58,864 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 41 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 59 [2022-04-05 06:18:58,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:18:58,871 INFO L225 Difference]: With dead ends: 1232 [2022-04-05 06:18:58,871 INFO L226 Difference]: Without dead ends: 1213 [2022-04-05 06:18:58,878 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 98 SyntacticMatches, 9 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=299, Invalid=5401, Unknown=0, NotChecked=0, Total=5700 [2022-04-05 06:18:58,879 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 77 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 2238 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 2276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 2238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-05 06:18:58,879 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 203 Invalid, 2276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 2238 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-05 06:18:58,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2022-04-05 06:18:59,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 1208. [2022-04-05 06:18:59,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1208 states, 1064 states have (on average 1.1240601503759398) internal successors, (1196), 1154 states have internal predecessors, (1196), 50 states have call successors, (50), 5 states have call predecessors, (50), 93 states have return successors, (106), 48 states have call predecessors, (106), 48 states have call successors, (106) [2022-04-05 06:18:59,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 1352 transitions. [2022-04-05 06:18:59,352 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 1352 transitions. Word has length 59 [2022-04-05 06:18:59,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:18:59,352 INFO L478 AbstractCegarLoop]: Abstraction has 1208 states and 1352 transitions. [2022-04-05 06:18:59,352 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 41 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:18:59,352 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 1352 transitions. [2022-04-05 06:18:59,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-05 06:18:59,361 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:18:59,361 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:18:59,378 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2022-04-05 06:18:59,562 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:18:59,563 INFO L403 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:18:59,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:18:59,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1280788378, now seen corresponding path program 98 times [2022-04-05 06:18:59,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:18:59,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805773313] [2022-04-05 06:18:59,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:18:59,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:18:59,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:59,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:18:59,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:59,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:18:59,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:59,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-05 06:18:59,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:59,835 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-04-05 06:18:59,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:18:59,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805773313] [2022-04-05 06:18:59,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805773313] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:18:59,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813661848] [2022-04-05 06:18:59,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 06:18:59,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:18:59,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:18:59,836 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:18:59,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-04-05 06:18:59,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 06:18:59,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:18:59,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-05 06:18:59,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:19:00,352 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-04-05 06:19:00,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:19:00,963 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-04-05 06:19:00,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813661848] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:19:00,964 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:19:00,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 19, 19] total 51 [2022-04-05 06:19:00,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633755558] [2022-04-05 06:19:00,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:19:00,964 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-04-05 06:19:00,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:19:00,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-04-05 06:19:00,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=2370, Unknown=0, NotChecked=0, Total=2550 [2022-04-05 06:19:00,965 INFO L87 Difference]: Start difference. First operand 1208 states and 1352 transitions. Second operand has 51 states, 51 states have (on average 1.4901960784313726) internal successors, (76), 50 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:19:03,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:19:03,628 INFO L93 Difference]: Finished difference Result 1222 states and 1365 transitions. [2022-04-05 06:19:03,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-05 06:19:03,638 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.4901960784313726) internal successors, (76), 50 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 59 [2022-04-05 06:19:03,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:19:03,643 INFO L225 Difference]: With dead ends: 1222 [2022-04-05 06:19:03,643 INFO L226 Difference]: Without dead ends: 1194 [2022-04-05 06:19:03,650 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 88 SyntacticMatches, 6 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 856 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=489, Invalid=5673, Unknown=0, NotChecked=0, Total=6162 [2022-04-05 06:19:03,651 INFO L913 BasicCegarLoop]: 93 mSDtfsCounter, 822 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 3694 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 835 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 3767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 3694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-05 06:19:03,651 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [835 Valid, 235 Invalid, 3767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 3694 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-05 06:19:03,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2022-04-05 06:19:04,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 1192. [2022-04-05 06:19:04,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1192 states, 1048 states have (on average 1.1240458015267176) internal successors, (1178), 1138 states have internal predecessors, (1178), 50 states have call successors, (50), 5 states have call predecessors, (50), 93 states have return successors, (96), 48 states have call predecessors, (96), 48 states have call successors, (96) [2022-04-05 06:19:04,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 1324 transitions. [2022-04-05 06:19:04,109 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 1324 transitions. Word has length 59 [2022-04-05 06:19:04,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:19:04,109 INFO L478 AbstractCegarLoop]: Abstraction has 1192 states and 1324 transitions. [2022-04-05 06:19:04,109 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.4901960784313726) internal successors, (76), 50 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:19:04,109 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 1324 transitions. [2022-04-05 06:19:04,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-04-05 06:19:04,117 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:19:04,117 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:19:04,134 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-04-05 06:19:04,318 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2022-04-05 06:19:04,318 INFO L403 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:19:04,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:19:04,318 INFO L85 PathProgramCache]: Analyzing trace with hash 2101168307, now seen corresponding path program 99 times [2022-04-05 06:19:04,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:19:04,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949319012] [2022-04-05 06:19:04,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:19:04,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:19:04,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:04,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:19:04,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:04,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:19:04,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:04,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-05 06:19:04,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:04,814 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:19:04,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:19:04,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949319012] [2022-04-05 06:19:04,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949319012] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:19:04,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435275390] [2022-04-05 06:19:04,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 06:19:04,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:19:04,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:19:04,815 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:19:04,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-04-05 06:19:04,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-04-05 06:19:04,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:19:04,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 36 conjunts are in the unsatisfiable core [2022-04-05 06:19:04,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:19:05,920 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:19:05,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:19:07,393 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:19:07,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435275390] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:19:07,394 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:19:07,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 31, 31] total 85 [2022-04-05 06:19:07,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330831720] [2022-04-05 06:19:07,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:19:07,394 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-04-05 06:19:07,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:19:07,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-04-05 06:19:07,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=6855, Unknown=0, NotChecked=0, Total=7140 [2022-04-05 06:19:07,395 INFO L87 Difference]: Start difference. First operand 1192 states and 1324 transitions. Second operand has 85 states, 85 states have (on average 1.388235294117647) internal successors, (118), 84 states have internal predecessors, (118), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:19:15,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:19:15,148 INFO L93 Difference]: Finished difference Result 1336 states and 1493 transitions. [2022-04-05 06:19:15,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-04-05 06:19:15,148 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.388235294117647) internal successors, (118), 84 states have internal predecessors, (118), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 60 [2022-04-05 06:19:15,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:19:15,163 INFO L225 Difference]: With dead ends: 1336 [2022-04-05 06:19:15,163 INFO L226 Difference]: Without dead ends: 1322 [2022-04-05 06:19:15,173 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2719 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1076, Invalid=17556, Unknown=0, NotChecked=0, Total=18632 [2022-04-05 06:19:15,173 INFO L913 BasicCegarLoop]: 144 mSDtfsCounter, 2065 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 9689 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2070 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 9914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 9689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-04-05 06:19:15,173 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2070 Valid, 376 Invalid, 9914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 9689 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-04-05 06:19:15,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1322 states. [2022-04-05 06:19:15,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1322 to 1313. [2022-04-05 06:19:15,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1313 states, 1154 states have (on average 1.123050259965338) internal successors, (1296), 1254 states have internal predecessors, (1296), 55 states have call successors, (55), 5 states have call predecessors, (55), 103 states have return successors, (111), 53 states have call predecessors, (111), 53 states have call successors, (111) [2022-04-05 06:19:15,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1313 states to 1313 states and 1462 transitions. [2022-04-05 06:19:15,743 INFO L78 Accepts]: Start accepts. Automaton has 1313 states and 1462 transitions. Word has length 60 [2022-04-05 06:19:15,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:19:15,743 INFO L478 AbstractCegarLoop]: Abstraction has 1313 states and 1462 transitions. [2022-04-05 06:19:15,743 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.388235294117647) internal successors, (118), 84 states have internal predecessors, (118), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:19:15,743 INFO L276 IsEmpty]: Start isEmpty. Operand 1313 states and 1462 transitions. [2022-04-05 06:19:15,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-04-05 06:19:15,753 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:19:15,753 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:19:15,770 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-04-05 06:19:15,954 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:19:15,954 INFO L403 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:19:15,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:19:15,955 INFO L85 PathProgramCache]: Analyzing trace with hash 58390781, now seen corresponding path program 100 times [2022-04-05 06:19:15,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:19:15,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810567393] [2022-04-05 06:19:15,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:19:15,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:19:15,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:15,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:19:15,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:15,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:19:15,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:16,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-05 06:19:16,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:16,529 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:19:16,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:19:16,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810567393] [2022-04-05 06:19:16,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810567393] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:19:16,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792778876] [2022-04-05 06:19:16,530 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 06:19:16,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:19:16,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:19:16,530 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:19:16,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-04-05 06:19:16,634 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 06:19:16,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:19:16,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 36 conjunts are in the unsatisfiable core [2022-04-05 06:19:16,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:19:17,681 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:19:17,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:19:19,152 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:19:19,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792778876] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:19:19,153 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:19:19,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 31, 31] total 85 [2022-04-05 06:19:19,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834670478] [2022-04-05 06:19:19,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:19:19,153 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-04-05 06:19:19,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:19:19,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-04-05 06:19:19,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=6855, Unknown=0, NotChecked=0, Total=7140 [2022-04-05 06:19:19,154 INFO L87 Difference]: Start difference. First operand 1313 states and 1462 transitions. Second operand has 85 states, 85 states have (on average 1.388235294117647) internal successors, (118), 84 states have internal predecessors, (118), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:19:25,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:19:25,910 INFO L93 Difference]: Finished difference Result 1328 states and 1477 transitions. [2022-04-05 06:19:25,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-04-05 06:19:25,910 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.388235294117647) internal successors, (118), 84 states have internal predecessors, (118), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 60 [2022-04-05 06:19:25,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:19:25,916 INFO L225 Difference]: With dead ends: 1328 [2022-04-05 06:19:25,916 INFO L226 Difference]: Without dead ends: 1316 [2022-04-05 06:19:25,926 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2735 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=1076, Invalid=17556, Unknown=0, NotChecked=0, Total=18632 [2022-04-05 06:19:25,926 INFO L913 BasicCegarLoop]: 146 mSDtfsCounter, 2088 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 9400 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2113 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 9602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 9400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-04-05 06:19:25,926 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2113 Valid, 373 Invalid, 9602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 9400 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-04-05 06:19:25,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1316 states. [2022-04-05 06:19:26,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1316 to 1314. [2022-04-05 06:19:26,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1314 states, 1155 states have (on average 1.122943722943723) internal successors, (1297), 1255 states have internal predecessors, (1297), 55 states have call successors, (55), 5 states have call predecessors, (55), 103 states have return successors, (105), 53 states have call predecessors, (105), 53 states have call successors, (105) [2022-04-05 06:19:26,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1314 states to 1314 states and 1457 transitions. [2022-04-05 06:19:26,488 INFO L78 Accepts]: Start accepts. Automaton has 1314 states and 1457 transitions. Word has length 60 [2022-04-05 06:19:26,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:19:26,488 INFO L478 AbstractCegarLoop]: Abstraction has 1314 states and 1457 transitions. [2022-04-05 06:19:26,489 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.388235294117647) internal successors, (118), 84 states have internal predecessors, (118), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:19:26,489 INFO L276 IsEmpty]: Start isEmpty. Operand 1314 states and 1457 transitions. [2022-04-05 06:19:26,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-04-05 06:19:26,500 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:19:26,500 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:19:26,522 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-04-05 06:19:26,700 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:19:26,700 INFO L403 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:19:26,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:19:26,701 INFO L85 PathProgramCache]: Analyzing trace with hash 684311254, now seen corresponding path program 101 times [2022-04-05 06:19:26,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:19:26,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706273904] [2022-04-05 06:19:26,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:19:26,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:19:26,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:26,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:19:26,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:26,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:19:26,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:26,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-05 06:19:26,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:26,828 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-04-05 06:19:26,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:19:26,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706273904] [2022-04-05 06:19:26,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706273904] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:19:26,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245361933] [2022-04-05 06:19:26,828 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 06:19:26,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:19:26,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:19:26,829 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:19:26,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-04-05 06:19:26,941 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-04-05 06:19:26,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:19:26,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-05 06:19:26,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:19:27,091 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-04-05 06:19:27,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:19:27,170 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-04-05 06:19:27,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245361933] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:19:27,171 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:19:27,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 25 [2022-04-05 06:19:27,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387769552] [2022-04-05 06:19:27,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:19:27,171 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-05 06:19:27,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:19:27,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-05 06:19:27,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=399, Unknown=0, NotChecked=0, Total=600 [2022-04-05 06:19:27,171 INFO L87 Difference]: Start difference. First operand 1314 states and 1457 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:19:28,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:19:28,543 INFO L93 Difference]: Finished difference Result 1985 states and 2169 transitions. [2022-04-05 06:19:28,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-04-05 06:19:28,544 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 60 [2022-04-05 06:19:28,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:19:28,565 INFO L225 Difference]: With dead ends: 1985 [2022-04-05 06:19:28,566 INFO L226 Difference]: Without dead ends: 1315 [2022-04-05 06:19:28,581 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 952 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1129, Invalid=2531, Unknown=0, NotChecked=0, Total=3660 [2022-04-05 06:19:28,581 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 99 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-05 06:19:28,581 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 103 Invalid, 759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-05 06:19:28,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1315 states. [2022-04-05 06:19:29,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1315 to 1307. [2022-04-05 06:19:29,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1307 states, 1154 states have (on average 1.1195840554592722) internal successors, (1292), 1250 states have internal predecessors, (1292), 53 states have call successors, (53), 5 states have call predecessors, (53), 99 states have return successors, (99), 51 states have call predecessors, (99), 51 states have call successors, (99) [2022-04-05 06:19:29,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1307 states to 1307 states and 1444 transitions. [2022-04-05 06:19:29,188 INFO L78 Accepts]: Start accepts. Automaton has 1307 states and 1444 transitions. Word has length 60 [2022-04-05 06:19:29,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:19:29,189 INFO L478 AbstractCegarLoop]: Abstraction has 1307 states and 1444 transitions. [2022-04-05 06:19:29,189 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:19:29,189 INFO L276 IsEmpty]: Start isEmpty. Operand 1307 states and 1444 transitions. [2022-04-05 06:19:29,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-04-05 06:19:29,199 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:19:29,199 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:19:29,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-04-05 06:19:29,416 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:19:29,416 INFO L403 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:19:29,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:19:29,416 INFO L85 PathProgramCache]: Analyzing trace with hash -942862021, now seen corresponding path program 102 times [2022-04-05 06:19:29,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:19:29,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011634165] [2022-04-05 06:19:29,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:19:29,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:19:29,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:29,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:19:29,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:29,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:19:29,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:29,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-05 06:19:29,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:29,529 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-04-05 06:19:29,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:19:29,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011634165] [2022-04-05 06:19:29,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011634165] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:19:29,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760254073] [2022-04-05 06:19:29,529 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-05 06:19:29,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:19:29,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:19:29,530 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:19:29,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-04-05 06:19:29,640 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-05 06:19:29,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:19:29,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-05 06:19:29,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:19:29,790 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-04-05 06:19:29,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:19:29,871 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-04-05 06:19:29,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760254073] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:19:29,871 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:19:29,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 25 [2022-04-05 06:19:29,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820705054] [2022-04-05 06:19:29,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:19:29,872 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-05 06:19:29,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:19:29,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-05 06:19:29,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=399, Unknown=0, NotChecked=0, Total=600 [2022-04-05 06:19:29,872 INFO L87 Difference]: Start difference. First operand 1307 states and 1444 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-05 06:19:31,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:19:31,094 INFO L93 Difference]: Finished difference Result 1365 states and 1514 transitions. [2022-04-05 06:19:31,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-04-05 06:19:31,095 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 60 [2022-04-05 06:19:31,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:19:31,102 INFO L225 Difference]: With dead ends: 1365 [2022-04-05 06:19:31,102 INFO L226 Difference]: Without dead ends: 1320 [2022-04-05 06:19:31,116 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 952 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1129, Invalid=2531, Unknown=0, NotChecked=0, Total=3660 [2022-04-05 06:19:31,116 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 99 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 06:19:31,116 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 88 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 06:19:31,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1320 states. [2022-04-05 06:19:31,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1320 to 1320. [2022-04-05 06:19:31,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1320 states, 1167 states have (on average 1.1182519280205656) internal successors, (1305), 1263 states have internal predecessors, (1305), 53 states have call successors, (53), 5 states have call predecessors, (53), 99 states have return successors, (99), 51 states have call predecessors, (99), 51 states have call successors, (99) [2022-04-05 06:19:31,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 1457 transitions. [2022-04-05 06:19:31,752 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 1457 transitions. Word has length 60 [2022-04-05 06:19:31,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:19:31,752 INFO L478 AbstractCegarLoop]: Abstraction has 1320 states and 1457 transitions. [2022-04-05 06:19:31,752 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-05 06:19:31,752 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 1457 transitions. [2022-04-05 06:19:31,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-05 06:19:31,763 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:19:31,763 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:19:31,785 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2022-04-05 06:19:31,963 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2022-04-05 06:19:31,964 INFO L403 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:19:31,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:19:31,964 INFO L85 PathProgramCache]: Analyzing trace with hash -615478622, now seen corresponding path program 103 times [2022-04-05 06:19:31,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:19:31,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141069709] [2022-04-05 06:19:31,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:19:31,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:19:31,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:32,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:19:32,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:32,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:19:32,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:32,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-05 06:19:32,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:32,674 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 06:19:32,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:19:32,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141069709] [2022-04-05 06:19:32,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141069709] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:19:32,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987134866] [2022-04-05 06:19:32,675 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-05 06:19:32,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:19:32,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:19:32,676 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:19:32,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-04-05 06:19:32,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:32,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 79 conjunts are in the unsatisfiable core [2022-04-05 06:19:32,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:19:33,165 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 06:19:33,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:19:33,450 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 06:19:33,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987134866] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:19:33,450 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:19:33,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 49 [2022-04-05 06:19:33,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579848535] [2022-04-05 06:19:33,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:19:33,451 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-04-05 06:19:33,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:19:33,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-04-05 06:19:33,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2247, Unknown=0, NotChecked=0, Total=2352 [2022-04-05 06:19:33,451 INFO L87 Difference]: Start difference. First operand 1320 states and 1457 transitions. Second operand has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:19:38,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:19:38,064 INFO L93 Difference]: Finished difference Result 1470 states and 1624 transitions. [2022-04-05 06:19:38,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-04-05 06:19:38,064 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 61 [2022-04-05 06:19:38,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:19:38,076 INFO L225 Difference]: With dead ends: 1470 [2022-04-05 06:19:38,076 INFO L226 Difference]: Without dead ends: 1464 [2022-04-05 06:19:38,089 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 116 SyntacticMatches, 5 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1073 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=301, Invalid=7709, Unknown=0, NotChecked=0, Total=8010 [2022-04-05 06:19:38,089 INFO L913 BasicCegarLoop]: 146 mSDtfsCounter, 314 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 9959 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 10023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 9959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-04-05 06:19:38,089 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 368 Invalid, 10023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 9959 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-04-05 06:19:38,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2022-04-05 06:19:38,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1336. [2022-04-05 06:19:38,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1336 states, 1180 states have (on average 1.11864406779661) internal successors, (1320), 1278 states have internal predecessors, (1320), 54 states have call successors, (54), 5 states have call predecessors, (54), 101 states have return successors, (102), 52 states have call predecessors, (102), 52 states have call successors, (102) [2022-04-05 06:19:38,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1336 states to 1336 states and 1476 transitions. [2022-04-05 06:19:38,667 INFO L78 Accepts]: Start accepts. Automaton has 1336 states and 1476 transitions. Word has length 61 [2022-04-05 06:19:38,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:19:38,667 INFO L478 AbstractCegarLoop]: Abstraction has 1336 states and 1476 transitions. [2022-04-05 06:19:38,667 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:19:38,667 INFO L276 IsEmpty]: Start isEmpty. Operand 1336 states and 1476 transitions. [2022-04-05 06:19:38,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-05 06:19:38,677 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:19:38,677 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:19:38,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2022-04-05 06:19:38,879 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:19:38,879 INFO L403 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:19:38,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:19:38,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1917062041, now seen corresponding path program 104 times [2022-04-05 06:19:38,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:19:38,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953494990] [2022-04-05 06:19:38,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:19:38,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:19:38,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:38,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:19:38,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:38,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:19:38,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:39,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-05 06:19:39,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:39,505 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-05 06:19:39,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:19:39,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953494990] [2022-04-05 06:19:39,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953494990] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:19:39,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514724789] [2022-04-05 06:19:39,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 06:19:39,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:19:39,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:19:39,507 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:19:39,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-04-05 06:19:39,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 06:19:39,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:19:39,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 75 conjunts are in the unsatisfiable core [2022-04-05 06:19:39,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:19:40,077 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-05 06:19:40,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:19:40,347 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-05 06:19:40,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514724789] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:19:40,347 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:19:40,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 49 [2022-04-05 06:19:40,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060135846] [2022-04-05 06:19:40,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:19:40,348 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-04-05 06:19:40,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:19:40,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-04-05 06:19:40,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2243, Unknown=0, NotChecked=0, Total=2352 [2022-04-05 06:19:40,348 INFO L87 Difference]: Start difference. First operand 1336 states and 1476 transitions. Second operand has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:19:43,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:19:43,978 INFO L93 Difference]: Finished difference Result 1342 states and 1481 transitions. [2022-04-05 06:19:43,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-04-05 06:19:43,979 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 61 [2022-04-05 06:19:43,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:19:43,987 INFO L225 Difference]: With dead ends: 1342 [2022-04-05 06:19:43,987 INFO L226 Difference]: Without dead ends: 1320 [2022-04-05 06:19:44,004 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 110 SyntacticMatches, 9 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1092 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=303, Invalid=7353, Unknown=0, NotChecked=0, Total=7656 [2022-04-05 06:19:44,004 INFO L913 BasicCegarLoop]: 134 mSDtfsCounter, 235 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 8628 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 8672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 8628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-04-05 06:19:44,004 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 346 Invalid, 8672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 8628 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-04-05 06:19:44,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1320 states. [2022-04-05 06:19:44,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1320 to 1320. [2022-04-05 06:19:44,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1320 states, 1167 states have (on average 1.1182519280205656) internal successors, (1305), 1263 states have internal predecessors, (1305), 53 states have call successors, (53), 5 states have call predecessors, (53), 99 states have return successors, (100), 51 states have call predecessors, (100), 51 states have call successors, (100) [2022-04-05 06:19:44,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 1458 transitions. [2022-04-05 06:19:44,615 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 1458 transitions. Word has length 61 [2022-04-05 06:19:44,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:19:44,615 INFO L478 AbstractCegarLoop]: Abstraction has 1320 states and 1458 transitions. [2022-04-05 06:19:44,615 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:19:44,615 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 1458 transitions. [2022-04-05 06:19:44,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-05 06:19:44,626 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:19:44,626 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:19:44,649 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2022-04-05 06:19:44,826 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:19:44,826 INFO L403 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:19:44,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:19:44,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1196260798, now seen corresponding path program 105 times [2022-04-05 06:19:44,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:19:44,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954044829] [2022-04-05 06:19:44,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:19:44,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:19:44,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:44,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:19:44,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:44,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:19:44,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:45,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-05 06:19:45,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:45,442 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 06:19:45,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:19:45,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954044829] [2022-04-05 06:19:45,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954044829] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:19:45,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606140803] [2022-04-05 06:19:45,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 06:19:45,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:19:45,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:19:45,443 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:19:45,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-04-05 06:19:45,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-04-05 06:19:45,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:19:45,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 71 conjunts are in the unsatisfiable core [2022-04-05 06:19:45,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:19:46,151 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 06:19:46,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:19:46,458 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 06:19:46,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606140803] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:19:46,458 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:19:46,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 49 [2022-04-05 06:19:46,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26884435] [2022-04-05 06:19:46,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:19:46,459 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-04-05 06:19:46,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:19:46,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-04-05 06:19:46,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=2239, Unknown=0, NotChecked=0, Total=2352 [2022-04-05 06:19:46,460 INFO L87 Difference]: Start difference. First operand 1320 states and 1458 transitions. Second operand has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:19:50,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:19:50,136 INFO L93 Difference]: Finished difference Result 1326 states and 1463 transitions. [2022-04-05 06:19:50,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-05 06:19:50,137 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 61 [2022-04-05 06:19:50,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:19:50,143 INFO L225 Difference]: With dead ends: 1326 [2022-04-05 06:19:50,143 INFO L226 Difference]: Without dead ends: 1302 [2022-04-05 06:19:50,170 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 108 SyntacticMatches, 9 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1097 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=305, Invalid=7005, Unknown=0, NotChecked=0, Total=7310 [2022-04-05 06:19:50,171 INFO L913 BasicCegarLoop]: 114 mSDtfsCounter, 199 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 7381 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 7425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 7381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-04-05 06:19:50,171 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 326 Invalid, 7425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 7381 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-04-05 06:19:50,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1302 states. [2022-04-05 06:19:50,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1302 to 1302. [2022-04-05 06:19:50,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1302 states, 1152 states have (on average 1.1180555555555556) internal successors, (1288), 1246 states have internal predecessors, (1288), 52 states have call successors, (52), 5 states have call predecessors, (52), 97 states have return successors, (98), 50 states have call predecessors, (98), 50 states have call successors, (98) [2022-04-05 06:19:50,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 1438 transitions. [2022-04-05 06:19:50,745 INFO L78 Accepts]: Start accepts. Automaton has 1302 states and 1438 transitions. Word has length 61 [2022-04-05 06:19:50,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:19:50,745 INFO L478 AbstractCegarLoop]: Abstraction has 1302 states and 1438 transitions. [2022-04-05 06:19:50,745 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:19:50,745 INFO L276 IsEmpty]: Start isEmpty. Operand 1302 states and 1438 transitions. [2022-04-05 06:19:50,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-05 06:19:50,755 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:19:50,755 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:19:50,779 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2022-04-05 06:19:50,955 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-04-05 06:19:50,955 INFO L403 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:19:50,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:19:50,956 INFO L85 PathProgramCache]: Analyzing trace with hash 998576327, now seen corresponding path program 106 times [2022-04-05 06:19:50,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:19:50,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535717716] [2022-04-05 06:19:50,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:19:50,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:19:50,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:51,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:19:51,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:51,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:19:51,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:51,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-05 06:19:51,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:51,521 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-05 06:19:51,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:19:51,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535717716] [2022-04-05 06:19:51,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535717716] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:19:51,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275424899] [2022-04-05 06:19:51,521 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 06:19:51,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:19:51,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:19:51,522 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:19:51,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-04-05 06:19:51,633 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 06:19:51,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:19:51,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 67 conjunts are in the unsatisfiable core [2022-04-05 06:19:51,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:19:52,252 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-05 06:19:52,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:19:52,532 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-05 06:19:52,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275424899] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:19:52,532 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:19:52,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 49 [2022-04-05 06:19:52,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265082513] [2022-04-05 06:19:52,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:19:52,533 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-04-05 06:19:52,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:19:52,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-04-05 06:19:52,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=2235, Unknown=0, NotChecked=0, Total=2352 [2022-04-05 06:19:52,533 INFO L87 Difference]: Start difference. First operand 1302 states and 1438 transitions. Second operand has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:19:55,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:19:55,295 INFO L93 Difference]: Finished difference Result 1308 states and 1443 transitions. [2022-04-05 06:19:55,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-05 06:19:55,295 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 61 [2022-04-05 06:19:55,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:19:55,301 INFO L225 Difference]: With dead ends: 1308 [2022-04-05 06:19:55,301 INFO L226 Difference]: Without dead ends: 1282 [2022-04-05 06:19:55,315 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 106 SyntacticMatches, 9 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1102 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=307, Invalid=6665, Unknown=0, NotChecked=0, Total=6972 [2022-04-05 06:19:55,315 INFO L913 BasicCegarLoop]: 94 mSDtfsCounter, 163 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 5430 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 5472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 5430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-04-05 06:19:55,315 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 281 Invalid, 5472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 5430 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-04-05 06:19:55,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1282 states. [2022-04-05 06:19:55,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1282 to 1282. [2022-04-05 06:19:55,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1282 states, 1135 states have (on average 1.1180616740088105) internal successors, (1269), 1227 states have internal predecessors, (1269), 51 states have call successors, (51), 5 states have call predecessors, (51), 95 states have return successors, (96), 49 states have call predecessors, (96), 49 states have call successors, (96) [2022-04-05 06:19:55,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 1416 transitions. [2022-04-05 06:19:55,863 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 1416 transitions. Word has length 61 [2022-04-05 06:19:55,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:19:55,863 INFO L478 AbstractCegarLoop]: Abstraction has 1282 states and 1416 transitions. [2022-04-05 06:19:55,863 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:19:55,863 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 1416 transitions. [2022-04-05 06:19:55,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-05 06:19:55,893 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:19:55,893 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:19:55,910 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2022-04-05 06:19:56,093 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2022-04-05 06:19:56,093 INFO L403 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:19:56,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:19:56,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1193071074, now seen corresponding path program 107 times [2022-04-05 06:19:56,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:19:56,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652637983] [2022-04-05 06:19:56,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:19:56,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:19:56,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:56,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:19:56,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:56,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:19:56,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:56,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-05 06:19:56,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:56,628 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-05 06:19:56,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:19:56,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652637983] [2022-04-05 06:19:56,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652637983] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:19:56,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861857702] [2022-04-05 06:19:56,628 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 06:19:56,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:19:56,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:19:56,630 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:19:56,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-04-05 06:19:56,740 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-04-05 06:19:56,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:19:56,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 63 conjunts are in the unsatisfiable core [2022-04-05 06:19:56,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:19:57,417 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-05 06:19:57,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:19:57,693 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-05 06:19:57,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861857702] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:19:57,693 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:19:57,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 49 [2022-04-05 06:19:57,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836845070] [2022-04-05 06:19:57,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:19:57,694 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-04-05 06:19:57,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:19:57,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-04-05 06:19:57,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=2231, Unknown=0, NotChecked=0, Total=2352 [2022-04-05 06:19:57,694 INFO L87 Difference]: Start difference. First operand 1282 states and 1416 transitions. Second operand has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:20:00,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:20:00,350 INFO L93 Difference]: Finished difference Result 1288 states and 1421 transitions. [2022-04-05 06:20:00,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-05 06:20:00,350 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 61 [2022-04-05 06:20:00,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:20:00,355 INFO L225 Difference]: With dead ends: 1288 [2022-04-05 06:20:00,356 INFO L226 Difference]: Without dead ends: 1260 [2022-04-05 06:20:00,364 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 104 SyntacticMatches, 9 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1107 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=309, Invalid=6333, Unknown=0, NotChecked=0, Total=6642 [2022-04-05 06:20:00,364 INFO L913 BasicCegarLoop]: 74 mSDtfsCounter, 127 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 4421 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 4461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 4421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-05 06:20:00,364 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 266 Invalid, 4461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 4421 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-05 06:20:00,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1260 states. [2022-04-05 06:20:00,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1260 to 1260. [2022-04-05 06:20:00,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1260 states, 1116 states have (on average 1.118279569892473) internal successors, (1248), 1206 states have internal predecessors, (1248), 50 states have call successors, (50), 5 states have call predecessors, (50), 93 states have return successors, (94), 48 states have call predecessors, (94), 48 states have call successors, (94) [2022-04-05 06:20:00,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1260 states to 1260 states and 1392 transitions. [2022-04-05 06:20:00,934 INFO L78 Accepts]: Start accepts. Automaton has 1260 states and 1392 transitions. Word has length 61 [2022-04-05 06:20:00,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:20:00,934 INFO L478 AbstractCegarLoop]: Abstraction has 1260 states and 1392 transitions. [2022-04-05 06:20:00,934 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:20:00,934 INFO L276 IsEmpty]: Start isEmpty. Operand 1260 states and 1392 transitions. [2022-04-05 06:20:00,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-05 06:20:00,943 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:20:00,943 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:20:00,960 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2022-04-05 06:20:01,144 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:20:01,145 INFO L403 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:20:01,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:20:01,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1708709159, now seen corresponding path program 108 times [2022-04-05 06:20:01,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:20:01,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815126635] [2022-04-05 06:20:01,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:20:01,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:20:01,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:01,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:20:01,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:01,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:20:01,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:01,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-05 06:20:01,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:01,635 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-05 06:20:01,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:20:01,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815126635] [2022-04-05 06:20:01,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815126635] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:20:01,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628223148] [2022-04-05 06:20:01,636 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-05 06:20:01,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:20:01,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:20:01,637 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:20:01,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-04-05 06:20:01,751 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-05 06:20:01,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:20:01,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 59 conjunts are in the unsatisfiable core [2022-04-05 06:20:01,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:20:02,452 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-05 06:20:02,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:20:02,722 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-05 06:20:02,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628223148] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:20:02,722 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:20:02,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 49 [2022-04-05 06:20:02,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131158284] [2022-04-05 06:20:02,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:20:02,723 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-04-05 06:20:02,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:20:02,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-04-05 06:20:02,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=2227, Unknown=0, NotChecked=0, Total=2352 [2022-04-05 06:20:02,724 INFO L87 Difference]: Start difference. First operand 1260 states and 1392 transitions. Second operand has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:20:04,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:20:04,879 INFO L93 Difference]: Finished difference Result 1266 states and 1397 transitions. [2022-04-05 06:20:04,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-05 06:20:04,879 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 61 [2022-04-05 06:20:04,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:20:04,884 INFO L225 Difference]: With dead ends: 1266 [2022-04-05 06:20:04,884 INFO L226 Difference]: Without dead ends: 1236 [2022-04-05 06:20:04,892 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 102 SyntacticMatches, 9 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1112 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=311, Invalid=6009, Unknown=0, NotChecked=0, Total=6320 [2022-04-05 06:20:04,893 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 90 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 3047 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 3085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 3047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-05 06:20:04,893 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 231 Invalid, 3085 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 3047 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-05 06:20:04,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1236 states. [2022-04-05 06:20:05,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1236 to 1236. [2022-04-05 06:20:05,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1236 states, 1095 states have (on average 1.1187214611872147) internal successors, (1225), 1183 states have internal predecessors, (1225), 49 states have call successors, (49), 5 states have call predecessors, (49), 91 states have return successors, (92), 47 states have call predecessors, (92), 47 states have call successors, (92) [2022-04-05 06:20:05,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1236 states to 1236 states and 1366 transitions. [2022-04-05 06:20:05,449 INFO L78 Accepts]: Start accepts. Automaton has 1236 states and 1366 transitions. Word has length 61 [2022-04-05 06:20:05,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:20:05,449 INFO L478 AbstractCegarLoop]: Abstraction has 1236 states and 1366 transitions. [2022-04-05 06:20:05,449 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:20:05,449 INFO L276 IsEmpty]: Start isEmpty. Operand 1236 states and 1366 transitions. [2022-04-05 06:20:05,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-05 06:20:05,458 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:20:05,458 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:20:05,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2022-04-05 06:20:05,658 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:20:05,658 INFO L403 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:20:05,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:20:05,659 INFO L85 PathProgramCache]: Analyzing trace with hash 751401346, now seen corresponding path program 109 times [2022-04-05 06:20:05,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:20:05,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656704887] [2022-04-05 06:20:05,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:20:05,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:20:05,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:05,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:20:05,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:05,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:20:05,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:05,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-05 06:20:05,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:06,071 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-05 06:20:06,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:20:06,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656704887] [2022-04-05 06:20:06,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656704887] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:20:06,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247826013] [2022-04-05 06:20:06,071 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-05 06:20:06,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:20:06,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:20:06,072 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:20:06,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-04-05 06:20:06,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:06,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-05 06:20:06,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:20:06,871 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-05 06:20:06,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:20:07,128 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-05 06:20:07,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247826013] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:20:07,128 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:20:07,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 49 [2022-04-05 06:20:07,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430291620] [2022-04-05 06:20:07,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:20:07,128 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-04-05 06:20:07,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:20:07,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-04-05 06:20:07,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=2223, Unknown=0, NotChecked=0, Total=2352 [2022-04-05 06:20:07,129 INFO L87 Difference]: Start difference. First operand 1236 states and 1366 transitions. Second operand has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:20:08,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:20:08,814 INFO L93 Difference]: Finished difference Result 1254 states and 1387 transitions. [2022-04-05 06:20:08,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-05 06:20:08,815 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 61 [2022-04-05 06:20:08,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:20:08,825 INFO L225 Difference]: With dead ends: 1254 [2022-04-05 06:20:08,825 INFO L226 Difference]: Without dead ends: 1248 [2022-04-05 06:20:08,834 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 100 SyntacticMatches, 9 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1117 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=313, Invalid=5693, Unknown=0, NotChecked=0, Total=6006 [2022-04-05 06:20:08,835 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 56 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 2105 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 2143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 2105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-05 06:20:08,835 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 216 Invalid, 2143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 2105 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-05 06:20:08,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2022-04-05 06:20:09,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 1246. [2022-04-05 06:20:09,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1246 states, 1102 states have (on average 1.1197822141560798) internal successors, (1234), 1192 states have internal predecessors, (1234), 50 states have call successors, (50), 5 states have call predecessors, (50), 93 states have return successors, (95), 48 states have call predecessors, (95), 48 states have call successors, (95) [2022-04-05 06:20:09,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 1379 transitions. [2022-04-05 06:20:09,392 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 1379 transitions. Word has length 61 [2022-04-05 06:20:09,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:20:09,393 INFO L478 AbstractCegarLoop]: Abstraction has 1246 states and 1379 transitions. [2022-04-05 06:20:09,393 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:20:09,393 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 1379 transitions. [2022-04-05 06:20:09,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-04-05 06:20:09,402 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:20:09,402 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:20:09,422 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2022-04-05 06:20:09,602 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2022-04-05 06:20:09,603 INFO L403 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:20:09,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:20:09,603 INFO L85 PathProgramCache]: Analyzing trace with hash -30593635, now seen corresponding path program 110 times [2022-04-05 06:20:09,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:20:09,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901849654] [2022-04-05 06:20:09,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:20:09,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:20:09,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:09,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:20:09,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:09,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:20:09,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:09,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-05 06:20:09,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:10,204 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:20:10,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:20:10,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901849654] [2022-04-05 06:20:10,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901849654] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:20:10,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085093734] [2022-04-05 06:20:10,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 06:20:10,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:20:10,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:20:10,205 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:20:10,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-04-05 06:20:10,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 06:20:10,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:20:10,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-05 06:20:10,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:20:11,515 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:20:11,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:20:13,199 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:20:13,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085093734] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:20:13,199 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:20:13,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 33, 33] total 91 [2022-04-05 06:20:13,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057679679] [2022-04-05 06:20:13,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:20:13,200 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-04-05 06:20:13,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:20:13,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-04-05 06:20:13,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=7884, Unknown=0, NotChecked=0, Total=8190 [2022-04-05 06:20:13,201 INFO L87 Difference]: Start difference. First operand 1246 states and 1379 transitions. Second operand has 91 states, 91 states have (on average 1.3626373626373627) internal successors, (124), 90 states have internal predecessors, (124), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:20:21,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:20:21,768 INFO L93 Difference]: Finished difference Result 1392 states and 1550 transitions. [2022-04-05 06:20:21,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-04-05 06:20:21,768 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.3626373626373627) internal successors, (124), 90 states have internal predecessors, (124), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 62 [2022-04-05 06:20:21,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:20:21,786 INFO L225 Difference]: With dead ends: 1392 [2022-04-05 06:20:21,787 INFO L226 Difference]: Without dead ends: 1378 [2022-04-05 06:20:21,796 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3152 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=1200, Invalid=20262, Unknown=0, NotChecked=0, Total=21462 [2022-04-05 06:20:21,796 INFO L913 BasicCegarLoop]: 154 mSDtfsCounter, 2415 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 11131 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2420 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 11387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 11131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-04-05 06:20:21,796 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2420 Valid, 411 Invalid, 11387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 11131 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-04-05 06:20:21,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1378 states. [2022-04-05 06:20:22,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1378 to 1369. [2022-04-05 06:20:22,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1369 states, 1210 states have (on average 1.1190082644628099) internal successors, (1354), 1310 states have internal predecessors, (1354), 55 states have call successors, (55), 5 states have call predecessors, (55), 103 states have return successors, (110), 53 states have call predecessors, (110), 53 states have call successors, (110) [2022-04-05 06:20:22,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1369 states to 1369 states and 1519 transitions. [2022-04-05 06:20:22,430 INFO L78 Accepts]: Start accepts. Automaton has 1369 states and 1519 transitions. Word has length 62 [2022-04-05 06:20:22,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:20:22,430 INFO L478 AbstractCegarLoop]: Abstraction has 1369 states and 1519 transitions. [2022-04-05 06:20:22,430 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 1.3626373626373627) internal successors, (124), 90 states have internal predecessors, (124), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:20:22,430 INFO L276 IsEmpty]: Start isEmpty. Operand 1369 states and 1519 transitions. [2022-04-05 06:20:22,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-04-05 06:20:22,441 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:20:22,441 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:20:22,472 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2022-04-05 06:20:22,641 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:20:22,642 INFO L403 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:20:22,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:20:22,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1067812499, now seen corresponding path program 111 times [2022-04-05 06:20:22,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:20:22,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950868026] [2022-04-05 06:20:22,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:20:22,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:20:22,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:22,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:20:22,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:22,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:20:22,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:22,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-05 06:20:22,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:23,267 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:20:23,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:20:23,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950868026] [2022-04-05 06:20:23,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950868026] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:20:23,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146808789] [2022-04-05 06:20:23,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 06:20:23,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:20:23,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:20:23,279 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:20:23,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-04-05 06:20:23,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-04-05 06:20:23,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:20:23,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-05 06:20:23,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:20:24,604 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:20:24,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:20:26,296 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:20:26,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146808789] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:20:26,296 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:20:26,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 33, 33] total 91 [2022-04-05 06:20:26,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938448736] [2022-04-05 06:20:26,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:20:26,296 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-04-05 06:20:26,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:20:26,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-04-05 06:20:26,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=7884, Unknown=0, NotChecked=0, Total=8190 [2022-04-05 06:20:26,298 INFO L87 Difference]: Start difference. First operand 1369 states and 1519 transitions. Second operand has 91 states, 91 states have (on average 1.3626373626373627) internal successors, (124), 90 states have internal predecessors, (124), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:20:34,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:20:34,634 INFO L93 Difference]: Finished difference Result 1384 states and 1534 transitions. [2022-04-05 06:20:34,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-04-05 06:20:34,635 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.3626373626373627) internal successors, (124), 90 states have internal predecessors, (124), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 62 [2022-04-05 06:20:34,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:20:34,647 INFO L225 Difference]: With dead ends: 1384 [2022-04-05 06:20:34,648 INFO L226 Difference]: Without dead ends: 1372 [2022-04-05 06:20:34,662 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3169 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=1200, Invalid=20262, Unknown=0, NotChecked=0, Total=21462 [2022-04-05 06:20:34,662 INFO L913 BasicCegarLoop]: 156 mSDtfsCounter, 2378 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 10526 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2405 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 10757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 10526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-04-05 06:20:34,662 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2405 Valid, 393 Invalid, 10757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 10526 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-04-05 06:20:34,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1372 states. [2022-04-05 06:20:35,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1372 to 1370. [2022-04-05 06:20:35,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1370 states, 1211 states have (on average 1.1189099917423617) internal successors, (1355), 1311 states have internal predecessors, (1355), 55 states have call successors, (55), 5 states have call predecessors, (55), 103 states have return successors, (104), 53 states have call predecessors, (104), 53 states have call successors, (104) [2022-04-05 06:20:35,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1370 states to 1370 states and 1514 transitions. [2022-04-05 06:20:35,360 INFO L78 Accepts]: Start accepts. Automaton has 1370 states and 1514 transitions. Word has length 62 [2022-04-05 06:20:35,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:20:35,361 INFO L478 AbstractCegarLoop]: Abstraction has 1370 states and 1514 transitions. [2022-04-05 06:20:35,361 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 1.3626373626373627) internal successors, (124), 90 states have internal predecessors, (124), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:20:35,361 INFO L276 IsEmpty]: Start isEmpty. Operand 1370 states and 1514 transitions. [2022-04-05 06:20:35,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-04-05 06:20:35,371 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:20:35,371 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:20:35,388 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2022-04-05 06:20:35,572 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:20:35,572 INFO L403 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:20:35,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:20:35,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1733958171, now seen corresponding path program 112 times [2022-04-05 06:20:35,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:20:35,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522002794] [2022-04-05 06:20:35,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:20:35,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:20:35,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:35,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:20:35,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:35,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:20:35,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:35,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-05 06:20:35,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:35,685 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-04-05 06:20:35,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:20:35,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522002794] [2022-04-05 06:20:35,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522002794] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:20:35,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950600800] [2022-04-05 06:20:35,685 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 06:20:35,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:20:35,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:20:35,686 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:20:35,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-04-05 06:20:35,795 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 06:20:35,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:20:35,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-05 06:20:35,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:20:35,962 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-04-05 06:20:35,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:20:36,038 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-04-05 06:20:36,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950600800] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:20:36,038 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:20:36,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 27 [2022-04-05 06:20:36,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541138704] [2022-04-05 06:20:36,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:20:36,039 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-05 06:20:36,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:20:36,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-05 06:20:36,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2022-04-05 06:20:36,039 INFO L87 Difference]: Start difference. First operand 1370 states and 1514 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-05 06:20:37,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:20:37,614 INFO L93 Difference]: Finished difference Result 1616 states and 1803 transitions. [2022-04-05 06:20:37,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-04-05 06:20:37,614 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 62 [2022-04-05 06:20:37,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:20:37,622 INFO L225 Difference]: With dead ends: 1616 [2022-04-05 06:20:37,622 INFO L226 Difference]: Without dead ends: 1554 [2022-04-05 06:20:37,634 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1091 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1216, Invalid=3754, Unknown=0, NotChecked=0, Total=4970 [2022-04-05 06:20:37,634 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 185 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 06:20:37,634 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 103 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 06:20:37,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1554 states. [2022-04-05 06:20:38,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1554 to 1512. [2022-04-05 06:20:38,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1512 states, 1353 states have (on average 1.1175166297117516) internal successors, (1512), 1453 states have internal predecessors, (1512), 55 states have call successors, (55), 5 states have call predecessors, (55), 103 states have return successors, (104), 53 states have call predecessors, (104), 53 states have call successors, (104) [2022-04-05 06:20:38,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 1671 transitions. [2022-04-05 06:20:38,350 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 1671 transitions. Word has length 62 [2022-04-05 06:20:38,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:20:38,350 INFO L478 AbstractCegarLoop]: Abstraction has 1512 states and 1671 transitions. [2022-04-05 06:20:38,350 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-05 06:20:38,350 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 1671 transitions. [2022-04-05 06:20:38,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-04-05 06:20:38,363 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:20:38,363 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:20:38,380 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2022-04-05 06:20:38,563 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable121 [2022-04-05 06:20:38,564 INFO L403 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:20:38,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:20:38,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1463773098, now seen corresponding path program 113 times [2022-04-05 06:20:38,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:20:38,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874029939] [2022-04-05 06:20:38,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:20:38,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:20:38,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:38,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:20:38,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:38,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:20:38,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:38,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-05 06:20:38,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:38,678 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-04-05 06:20:38,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:20:38,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874029939] [2022-04-05 06:20:38,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874029939] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:20:38,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347065310] [2022-04-05 06:20:38,679 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 06:20:38,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:20:38,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:20:38,679 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:20:38,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-04-05 06:20:38,787 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-04-05 06:20:38,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:20:38,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-05 06:20:38,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:20:38,955 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-04-05 06:20:38,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:20:39,031 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-04-05 06:20:39,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347065310] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:20:39,031 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:20:39,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 27 [2022-04-05 06:20:39,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144996349] [2022-04-05 06:20:39,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:20:39,031 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-05 06:20:39,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:20:39,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-05 06:20:39,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2022-04-05 06:20:39,032 INFO L87 Difference]: Start difference. First operand 1512 states and 1671 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:20:40,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:20:40,609 INFO L93 Difference]: Finished difference Result 2555 states and 2807 transitions. [2022-04-05 06:20:40,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-04-05 06:20:40,609 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 62 [2022-04-05 06:20:40,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:20:40,639 INFO L225 Difference]: With dead ends: 2555 [2022-04-05 06:20:40,640 INFO L226 Difference]: Without dead ends: 1696 [2022-04-05 06:20:40,655 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1091 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1216, Invalid=3754, Unknown=0, NotChecked=0, Total=4970 [2022-04-05 06:20:40,655 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 206 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 06:20:40,655 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 93 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 06:20:40,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1696 states. [2022-04-05 06:20:41,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1696 to 1654. [2022-04-05 06:20:41,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1654 states, 1495 states have (on average 1.1163879598662207) internal successors, (1669), 1595 states have internal predecessors, (1669), 55 states have call successors, (55), 5 states have call predecessors, (55), 103 states have return successors, (104), 53 states have call predecessors, (104), 53 states have call successors, (104) [2022-04-05 06:20:41,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1654 states to 1654 states and 1828 transitions. [2022-04-05 06:20:41,500 INFO L78 Accepts]: Start accepts. Automaton has 1654 states and 1828 transitions. Word has length 62 [2022-04-05 06:20:41,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:20:41,500 INFO L478 AbstractCegarLoop]: Abstraction has 1654 states and 1828 transitions. [2022-04-05 06:20:41,501 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:20:41,501 INFO L276 IsEmpty]: Start isEmpty. Operand 1654 states and 1828 transitions. [2022-04-05 06:20:41,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-05 06:20:41,514 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:20:41,514 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:20:41,532 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2022-04-05 06:20:41,715 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:20:41,715 INFO L403 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:20:41,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:20:41,715 INFO L85 PathProgramCache]: Analyzing trace with hash 611823564, now seen corresponding path program 114 times [2022-04-05 06:20:41,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:20:41,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375522312] [2022-04-05 06:20:41,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:20:41,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:20:41,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:41,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:20:41,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:41,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:20:41,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:42,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-05 06:20:42,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:42,481 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 06:20:42,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:20:42,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375522312] [2022-04-05 06:20:42,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375522312] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:20:42,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010309064] [2022-04-05 06:20:42,482 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-05 06:20:42,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:20:42,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:20:42,483 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:20:42,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-04-05 06:20:42,595 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-04-05 06:20:42,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:20:42,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 83 conjunts are in the unsatisfiable core [2022-04-05 06:20:42,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:20:42,954 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 06:20:42,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:20:43,206 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 06:20:43,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010309064] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:20:43,207 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:20:43,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 51 [2022-04-05 06:20:43,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240853637] [2022-04-05 06:20:43,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:20:43,207 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-04-05 06:20:43,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:20:43,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-04-05 06:20:43,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2441, Unknown=0, NotChecked=0, Total=2550 [2022-04-05 06:20:43,208 INFO L87 Difference]: Start difference. First operand 1654 states and 1828 transitions. Second operand has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:20:47,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:20:47,984 INFO L93 Difference]: Finished difference Result 1824 states and 2017 transitions. [2022-04-05 06:20:47,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-04-05 06:20:47,985 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 63 [2022-04-05 06:20:47,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:20:47,997 INFO L225 Difference]: With dead ends: 1824 [2022-04-05 06:20:47,997 INFO L226 Difference]: Without dead ends: 1818 [2022-04-05 06:20:48,010 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 120 SyntacticMatches, 5 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1168 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=313, Invalid=8429, Unknown=0, NotChecked=0, Total=8742 [2022-04-05 06:20:48,010 INFO L913 BasicCegarLoop]: 158 mSDtfsCounter, 337 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 11002 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 11068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 11002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-04-05 06:20:48,010 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [346 Valid, 385 Invalid, 11068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 11002 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-04-05 06:20:48,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1818 states. [2022-04-05 06:20:48,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1818 to 1670. [2022-04-05 06:20:48,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1670 states, 1508 states have (on average 1.1167108753315649) internal successors, (1684), 1610 states have internal predecessors, (1684), 56 states have call successors, (56), 5 states have call predecessors, (56), 105 states have return successors, (107), 54 states have call predecessors, (107), 54 states have call successors, (107) [2022-04-05 06:20:48,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1670 states to 1670 states and 1847 transitions. [2022-04-05 06:20:48,870 INFO L78 Accepts]: Start accepts. Automaton has 1670 states and 1847 transitions. Word has length 63 [2022-04-05 06:20:48,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:20:48,871 INFO L478 AbstractCegarLoop]: Abstraction has 1670 states and 1847 transitions. [2022-04-05 06:20:48,871 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:20:48,871 INFO L276 IsEmpty]: Start isEmpty. Operand 1670 states and 1847 transitions. [2022-04-05 06:20:48,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-05 06:20:48,885 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:20:48,885 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:20:48,902 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2022-04-05 06:20:49,085 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2022-04-05 06:20:49,085 INFO L403 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:20:49,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:20:49,086 INFO L85 PathProgramCache]: Analyzing trace with hash -2009970889, now seen corresponding path program 115 times [2022-04-05 06:20:49,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:20:49,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113614243] [2022-04-05 06:20:49,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:20:49,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:20:49,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:49,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:20:49,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:49,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:20:49,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:49,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-05 06:20:49,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:49,754 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-05 06:20:49,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:20:49,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113614243] [2022-04-05 06:20:49,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113614243] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:20:49,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890951898] [2022-04-05 06:20:49,754 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-05 06:20:49,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:20:49,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:20:49,755 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:20:49,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-04-05 06:20:49,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:49,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 79 conjunts are in the unsatisfiable core [2022-04-05 06:20:49,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:20:50,359 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-05 06:20:50,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:20:50,646 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-05 06:20:50,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890951898] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:20:50,647 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:20:50,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 51 [2022-04-05 06:20:50,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081661290] [2022-04-05 06:20:50,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:20:50,647 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-04-05 06:20:50,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:20:50,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-04-05 06:20:50,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=2437, Unknown=0, NotChecked=0, Total=2550 [2022-04-05 06:20:50,648 INFO L87 Difference]: Start difference. First operand 1670 states and 1847 transitions. Second operand has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:20:54,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:20:54,863 INFO L93 Difference]: Finished difference Result 1676 states and 1852 transitions. [2022-04-05 06:20:54,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-04-05 06:20:54,863 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 63 [2022-04-05 06:20:54,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:20:54,872 INFO L225 Difference]: With dead ends: 1676 [2022-04-05 06:20:54,872 INFO L226 Difference]: Without dead ends: 1654 [2022-04-05 06:20:54,887 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 114 SyntacticMatches, 9 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1187 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=315, Invalid=8057, Unknown=0, NotChecked=0, Total=8372 [2022-04-05 06:20:54,887 INFO L913 BasicCegarLoop]: 138 mSDtfsCounter, 259 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 9011 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 9059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 9011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-04-05 06:20:54,888 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 350 Invalid, 9059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 9011 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-04-05 06:20:54,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1654 states. [2022-04-05 06:20:55,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1654 to 1654. [2022-04-05 06:20:55,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1654 states, 1495 states have (on average 1.1163879598662207) internal successors, (1669), 1595 states have internal predecessors, (1669), 55 states have call successors, (55), 5 states have call predecessors, (55), 103 states have return successors, (105), 53 states have call predecessors, (105), 53 states have call successors, (105) [2022-04-05 06:20:55,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1654 states to 1654 states and 1829 transitions. [2022-04-05 06:20:55,775 INFO L78 Accepts]: Start accepts. Automaton has 1654 states and 1829 transitions. Word has length 63 [2022-04-05 06:20:55,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:20:55,775 INFO L478 AbstractCegarLoop]: Abstraction has 1654 states and 1829 transitions. [2022-04-05 06:20:55,775 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:20:55,776 INFO L276 IsEmpty]: Start isEmpty. Operand 1654 states and 1829 transitions. [2022-04-05 06:20:55,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-05 06:20:55,819 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:20:55,819 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:20:55,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2022-04-05 06:20:56,019 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2022-04-05 06:20:56,020 INFO L403 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:20:56,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:20:56,020 INFO L85 PathProgramCache]: Analyzing trace with hash -513799892, now seen corresponding path program 116 times [2022-04-05 06:20:56,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:20:56,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298178607] [2022-04-05 06:20:56,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:20:56,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:20:56,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:56,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:20:56,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:56,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:20:56,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:56,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-05 06:20:56,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:56,697 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 06:20:56,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:20:56,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298178607] [2022-04-05 06:20:56,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298178607] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:20:56,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831327295] [2022-04-05 06:20:56,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 06:20:56,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:20:56,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:20:56,698 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:20:56,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-04-05 06:20:56,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 06:20:56,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:20:56,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 75 conjunts are in the unsatisfiable core [2022-04-05 06:20:56,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:20:57,345 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 06:20:57,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:20:57,631 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 06:20:57,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831327295] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:20:57,632 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:20:57,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 51 [2022-04-05 06:20:57,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707540914] [2022-04-05 06:20:57,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:20:57,632 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-04-05 06:20:57,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:20:57,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-04-05 06:20:57,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=2433, Unknown=0, NotChecked=0, Total=2550 [2022-04-05 06:20:57,633 INFO L87 Difference]: Start difference. First operand 1654 states and 1829 transitions. Second operand has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:21:01,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:21:01,292 INFO L93 Difference]: Finished difference Result 1660 states and 1834 transitions. [2022-04-05 06:21:01,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-04-05 06:21:01,292 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 63 [2022-04-05 06:21:01,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:21:01,301 INFO L225 Difference]: With dead ends: 1660 [2022-04-05 06:21:01,301 INFO L226 Difference]: Without dead ends: 1636 [2022-04-05 06:21:01,314 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 112 SyntacticMatches, 9 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1192 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=317, Invalid=7693, Unknown=0, NotChecked=0, Total=8010 [2022-04-05 06:21:01,314 INFO L913 BasicCegarLoop]: 118 mSDtfsCounter, 223 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 7766 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 7814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 7766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-04-05 06:21:01,314 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 330 Invalid, 7814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 7766 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-04-05 06:21:01,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1636 states. [2022-04-05 06:21:02,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1636 to 1636. [2022-04-05 06:21:02,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1636 states, 1480 states have (on average 1.1162162162162161) internal successors, (1652), 1578 states have internal predecessors, (1652), 54 states have call successors, (54), 5 states have call predecessors, (54), 101 states have return successors, (103), 52 states have call predecessors, (103), 52 states have call successors, (103) [2022-04-05 06:21:02,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1636 states to 1636 states and 1809 transitions. [2022-04-05 06:21:02,186 INFO L78 Accepts]: Start accepts. Automaton has 1636 states and 1809 transitions. Word has length 63 [2022-04-05 06:21:02,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:21:02,186 INFO L478 AbstractCegarLoop]: Abstraction has 1636 states and 1809 transitions. [2022-04-05 06:21:02,186 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:21:02,186 INFO L276 IsEmpty]: Start isEmpty. Operand 1636 states and 1809 transitions. [2022-04-05 06:21:02,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-05 06:21:02,199 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:21:02,199 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:21:02,216 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2022-04-05 06:21:02,399 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2022-04-05 06:21:02,400 INFO L403 AbstractCegarLoop]: === Iteration 127 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:21:02,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:21:02,400 INFO L85 PathProgramCache]: Analyzing trace with hash -369649193, now seen corresponding path program 117 times [2022-04-05 06:21:02,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:21:02,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026445448] [2022-04-05 06:21:02,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:21:02,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:21:02,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:21:02,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:21:02,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:21:02,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:21:02,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:21:02,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-05 06:21:02,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:21:02,981 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-05 06:21:02,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:21:02,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026445448] [2022-04-05 06:21:02,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026445448] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:21:02,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058204280] [2022-04-05 06:21:02,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 06:21:02,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:21:02,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:21:02,983 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:21:02,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-04-05 06:21:03,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-04-05 06:21:03,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:21:03,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 71 conjunts are in the unsatisfiable core [2022-04-05 06:21:03,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:21:03,685 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-05 06:21:03,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:21:03,963 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-05 06:21:03,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058204280] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:21:03,964 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:21:03,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 51 [2022-04-05 06:21:03,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185402470] [2022-04-05 06:21:03,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:21:03,964 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-04-05 06:21:03,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:21:03,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-04-05 06:21:03,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=2429, Unknown=0, NotChecked=0, Total=2550 [2022-04-05 06:21:03,965 INFO L87 Difference]: Start difference. First operand 1636 states and 1809 transitions. Second operand has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:21:07,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:21:07,338 INFO L93 Difference]: Finished difference Result 1642 states and 1814 transitions. [2022-04-05 06:21:07,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-05 06:21:07,338 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 63 [2022-04-05 06:21:07,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:21:07,346 INFO L225 Difference]: With dead ends: 1642 [2022-04-05 06:21:07,346 INFO L226 Difference]: Without dead ends: 1616 [2022-04-05 06:21:07,358 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 110 SyntacticMatches, 9 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1197 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=319, Invalid=7337, Unknown=0, NotChecked=0, Total=7656 [2022-04-05 06:21:07,358 INFO L913 BasicCegarLoop]: 98 mSDtfsCounter, 187 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 6084 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 6130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 6084 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-04-05 06:21:07,358 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 295 Invalid, 6130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 6084 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-04-05 06:21:07,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1616 states. [2022-04-05 06:21:08,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1616 to 1616. [2022-04-05 06:21:08,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1616 states, 1463 states have (on average 1.1161995898838004) internal successors, (1633), 1559 states have internal predecessors, (1633), 53 states have call successors, (53), 5 states have call predecessors, (53), 99 states have return successors, (101), 51 states have call predecessors, (101), 51 states have call successors, (101) [2022-04-05 06:21:08,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1616 states to 1616 states and 1787 transitions. [2022-04-05 06:21:08,175 INFO L78 Accepts]: Start accepts. Automaton has 1616 states and 1787 transitions. Word has length 63 [2022-04-05 06:21:08,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:21:08,175 INFO L478 AbstractCegarLoop]: Abstraction has 1616 states and 1787 transitions. [2022-04-05 06:21:08,175 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:21:08,175 INFO L276 IsEmpty]: Start isEmpty. Operand 1616 states and 1787 transitions. [2022-04-05 06:21:08,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-05 06:21:08,188 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:21:08,188 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:21:08,204 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2022-04-05 06:21:08,389 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:21:08,391 INFO L403 AbstractCegarLoop]: === Iteration 128 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:21:08,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:21:08,391 INFO L85 PathProgramCache]: Analyzing trace with hash 944933516, now seen corresponding path program 118 times [2022-04-05 06:21:08,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:21:08,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898173117] [2022-04-05 06:21:08,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:21:08,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:21:08,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:21:08,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:21:08,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:21:08,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:21:08,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:21:08,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-05 06:21:08,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:21:08,942 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-05 06:21:08,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:21:08,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898173117] [2022-04-05 06:21:08,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898173117] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:21:08,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886292269] [2022-04-05 06:21:08,943 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 06:21:08,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:21:08,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:21:08,943 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:21:08,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-04-05 06:21:09,054 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 06:21:09,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:21:09,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 67 conjunts are in the unsatisfiable core [2022-04-05 06:21:09,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:21:09,688 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-05 06:21:09,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:21:09,952 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-05 06:21:09,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886292269] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:21:09,953 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:21:09,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 51 [2022-04-05 06:21:09,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007603690] [2022-04-05 06:21:09,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:21:09,953 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-04-05 06:21:09,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:21:09,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-04-05 06:21:09,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=2425, Unknown=0, NotChecked=0, Total=2550 [2022-04-05 06:21:09,954 INFO L87 Difference]: Start difference. First operand 1616 states and 1787 transitions. Second operand has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:21:12,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:21:12,871 INFO L93 Difference]: Finished difference Result 1622 states and 1792 transitions. [2022-04-05 06:21:12,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-05 06:21:12,871 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 63 [2022-04-05 06:21:12,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:21:12,878 INFO L225 Difference]: With dead ends: 1622 [2022-04-05 06:21:12,878 INFO L226 Difference]: Without dead ends: 1594 [2022-04-05 06:21:12,889 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 108 SyntacticMatches, 9 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1202 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=321, Invalid=6989, Unknown=0, NotChecked=0, Total=7310 [2022-04-05 06:21:12,890 INFO L913 BasicCegarLoop]: 78 mSDtfsCounter, 150 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 5268 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 5312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 5268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-04-05 06:21:12,890 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 290 Invalid, 5312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 5268 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-04-05 06:21:12,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1594 states. [2022-04-05 06:21:13,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1594 to 1594. [2022-04-05 06:21:13,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1594 states, 1444 states have (on average 1.1163434903047091) internal successors, (1612), 1538 states have internal predecessors, (1612), 52 states have call successors, (52), 5 states have call predecessors, (52), 97 states have return successors, (99), 50 states have call predecessors, (99), 50 states have call successors, (99) [2022-04-05 06:21:13,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 1763 transitions. [2022-04-05 06:21:13,691 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 1763 transitions. Word has length 63 [2022-04-05 06:21:13,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:21:13,691 INFO L478 AbstractCegarLoop]: Abstraction has 1594 states and 1763 transitions. [2022-04-05 06:21:13,691 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:21:13,691 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 1763 transitions. [2022-04-05 06:21:13,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-05 06:21:13,703 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:21:13,703 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:21:13,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2022-04-05 06:21:13,919 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2022-04-05 06:21:13,919 INFO L403 AbstractCegarLoop]: === Iteration 129 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:21:13,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:21:13,920 INFO L85 PathProgramCache]: Analyzing trace with hash -107494281, now seen corresponding path program 119 times [2022-04-05 06:21:13,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:21:13,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919285523] [2022-04-05 06:21:13,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:21:13,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:21:13,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:21:13,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:21:13,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:21:13,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:21:13,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:21:14,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-05 06:21:14,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:21:14,428 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-05 06:21:14,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:21:14,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919285523] [2022-04-05 06:21:14,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919285523] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:21:14,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153939053] [2022-04-05 06:21:14,429 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 06:21:14,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:21:14,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:21:14,430 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:21:14,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-04-05 06:21:14,541 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-04-05 06:21:14,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:21:14,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 63 conjunts are in the unsatisfiable core [2022-04-05 06:21:14,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:21:15,217 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-05 06:21:15,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:21:15,473 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-05 06:21:15,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153939053] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:21:15,473 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:21:15,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 51 [2022-04-05 06:21:15,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732928059] [2022-04-05 06:21:15,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:21:15,474 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-04-05 06:21:15,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:21:15,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-04-05 06:21:15,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=2421, Unknown=0, NotChecked=0, Total=2550 [2022-04-05 06:21:15,475 INFO L87 Difference]: Start difference. First operand 1594 states and 1763 transitions. Second operand has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:21:17,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:21:17,920 INFO L93 Difference]: Finished difference Result 1600 states and 1768 transitions. [2022-04-05 06:21:17,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-05 06:21:17,920 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 63 [2022-04-05 06:21:17,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:21:17,927 INFO L225 Difference]: With dead ends: 1600 [2022-04-05 06:21:17,927 INFO L226 Difference]: Without dead ends: 1570 [2022-04-05 06:21:17,939 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 106 SyntacticMatches, 9 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1207 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=323, Invalid=6649, Unknown=0, NotChecked=0, Total=6972 [2022-04-05 06:21:17,939 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 115 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 3693 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 3735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 3693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-05 06:21:17,940 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 250 Invalid, 3735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 3693 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-05 06:21:17,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1570 states. [2022-04-05 06:21:18,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1570 to 1570. [2022-04-05 06:21:18,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1570 states, 1423 states have (on average 1.1166549543218551) internal successors, (1589), 1515 states have internal predecessors, (1589), 51 states have call successors, (51), 5 states have call predecessors, (51), 95 states have return successors, (97), 49 states have call predecessors, (97), 49 states have call successors, (97) [2022-04-05 06:21:18,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1570 states to 1570 states and 1737 transitions. [2022-04-05 06:21:18,775 INFO L78 Accepts]: Start accepts. Automaton has 1570 states and 1737 transitions. Word has length 63 [2022-04-05 06:21:18,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:21:18,775 INFO L478 AbstractCegarLoop]: Abstraction has 1570 states and 1737 transitions. [2022-04-05 06:21:18,775 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:21:18,776 INFO L276 IsEmpty]: Start isEmpty. Operand 1570 states and 1737 transitions. [2022-04-05 06:21:18,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-05 06:21:18,789 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:21:18,789 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:21:18,806 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2022-04-05 06:21:18,989 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2022-04-05 06:21:18,990 INFO L403 AbstractCegarLoop]: === Iteration 130 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:21:18,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:21:18,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1754472230, now seen corresponding path program 120 times [2022-04-05 06:21:18,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:21:18,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704155374] [2022-04-05 06:21:18,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:21:18,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:21:19,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:21:19,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:21:19,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:21:19,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:21:19,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:21:19,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-05 06:21:19,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:21:19,310 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-05 06:21:19,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:21:19,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704155374] [2022-04-05 06:21:19,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704155374] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:21:19,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788526122] [2022-04-05 06:21:19,311 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-05 06:21:19,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:21:19,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:21:19,312 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:21:19,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-04-05 06:21:19,422 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-05 06:21:19,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:21:19,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-05 06:21:19,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:21:19,937 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-05 06:21:19,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:21:20,657 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-05 06:21:20,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788526122] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:21:20,657 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:21:20,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 21, 21] total 57 [2022-04-05 06:21:20,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292610805] [2022-04-05 06:21:20,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:21:20,657 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-04-05 06:21:20,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:21:20,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-04-05 06:21:20,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=2989, Unknown=0, NotChecked=0, Total=3192 [2022-04-05 06:21:20,658 INFO L87 Difference]: Start difference. First operand 1570 states and 1737 transitions. Second operand has 57 states, 57 states have (on average 1.4385964912280702) internal successors, (82), 56 states have internal predecessors, (82), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:21:24,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:21:24,367 INFO L93 Difference]: Finished difference Result 1690 states and 1883 transitions. [2022-04-05 06:21:24,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-04-05 06:21:24,367 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.4385964912280702) internal successors, (82), 56 states have internal predecessors, (82), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 63 [2022-04-05 06:21:24,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:21:24,401 INFO L225 Difference]: With dead ends: 1690 [2022-04-05 06:21:24,401 INFO L226 Difference]: Without dead ends: 1670 [2022-04-05 06:21:24,415 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 93 SyntacticMatches, 5 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1094 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=580, Invalid=7252, Unknown=0, NotChecked=0, Total=7832 [2022-04-05 06:21:24,415 INFO L913 BasicCegarLoop]: 107 mSDtfsCounter, 848 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 4949 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 852 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 5043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 4949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-04-05 06:21:24,415 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [852 Valid, 274 Invalid, 5043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 4949 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-04-05 06:21:24,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1670 states. [2022-04-05 06:21:25,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1670 to 1665. [2022-04-05 06:21:25,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1665 states, 1479 states have (on average 1.1115618661257607) internal successors, (1644), 1597 states have internal predecessors, (1644), 64 states have call successors, (64), 5 states have call predecessors, (64), 121 states have return successors, (136), 62 states have call predecessors, (136), 62 states have call successors, (136) [2022-04-05 06:21:25,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1665 states to 1665 states and 1844 transitions. [2022-04-05 06:21:25,255 INFO L78 Accepts]: Start accepts. Automaton has 1665 states and 1844 transitions. Word has length 63 [2022-04-05 06:21:25,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:21:25,255 INFO L478 AbstractCegarLoop]: Abstraction has 1665 states and 1844 transitions. [2022-04-05 06:21:25,255 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.4385964912280702) internal successors, (82), 56 states have internal predecessors, (82), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:21:25,255 INFO L276 IsEmpty]: Start isEmpty. Operand 1665 states and 1844 transitions. [2022-04-05 06:21:25,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-05 06:21:25,275 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:21:25,276 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:21:25,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2022-04-05 06:21:25,476 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2022-04-05 06:21:25,476 INFO L403 AbstractCegarLoop]: === Iteration 131 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:21:25,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:21:25,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1109734380, now seen corresponding path program 121 times [2022-04-05 06:21:25,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:21:25,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725018685] [2022-04-05 06:21:25,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:21:25,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:21:25,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:21:25,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:21:25,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:21:25,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:21:25,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:21:25,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-05 06:21:25,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:21:25,955 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-05 06:21:25,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:21:25,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725018685] [2022-04-05 06:21:25,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725018685] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:21:25,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635841752] [2022-04-05 06:21:25,955 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-05 06:21:25,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:21:25,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:21:25,956 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:21:25,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-04-05 06:21:26,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:21:26,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 59 conjunts are in the unsatisfiable core [2022-04-05 06:21:26,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:21:26,801 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-05 06:21:26,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:21:27,068 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-05 06:21:27,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635841752] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:21:27,068 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:21:27,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 51 [2022-04-05 06:21:27,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886754270] [2022-04-05 06:21:27,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:21:27,069 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-04-05 06:21:27,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:21:27,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-04-05 06:21:27,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=2417, Unknown=0, NotChecked=0, Total=2550 [2022-04-05 06:21:27,070 INFO L87 Difference]: Start difference. First operand 1665 states and 1844 transitions. Second operand has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:21:29,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:21:29,275 INFO L93 Difference]: Finished difference Result 1683 states and 1866 transitions. [2022-04-05 06:21:29,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-05 06:21:29,275 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 63 [2022-04-05 06:21:29,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:21:29,286 INFO L225 Difference]: With dead ends: 1683 [2022-04-05 06:21:29,286 INFO L226 Difference]: Without dead ends: 1663 [2022-04-05 06:21:29,300 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 104 SyntacticMatches, 9 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1212 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=325, Invalid=6317, Unknown=0, NotChecked=0, Total=6642 [2022-04-05 06:21:29,300 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 76 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 2647 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 2687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 2647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-05 06:21:29,300 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 228 Invalid, 2687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 2647 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-05 06:21:29,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1663 states. [2022-04-05 06:21:30,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1663 to 1658. [2022-04-05 06:21:30,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1658 states, 1472 states have (on average 1.1127717391304348) internal successors, (1638), 1590 states have internal predecessors, (1638), 64 states have call successors, (64), 5 states have call predecessors, (64), 121 states have return successors, (136), 62 states have call predecessors, (136), 62 states have call successors, (136) [2022-04-05 06:21:30,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 1838 transitions. [2022-04-05 06:21:30,106 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 1838 transitions. Word has length 63 [2022-04-05 06:21:30,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:21:30,106 INFO L478 AbstractCegarLoop]: Abstraction has 1658 states and 1838 transitions. [2022-04-05 06:21:30,106 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:21:30,106 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 1838 transitions. [2022-04-05 06:21:30,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-05 06:21:30,122 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:21:30,122 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:21:30,138 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2022-04-05 06:21:30,322 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:21:30,322 INFO L403 AbstractCegarLoop]: === Iteration 132 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:21:30,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:21:30,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1079484753, now seen corresponding path program 122 times [2022-04-05 06:21:30,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:21:30,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919487502] [2022-04-05 06:21:30,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:21:30,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:21:30,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:21:30,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:21:30,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:21:30,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:21:30,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:21:30,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-05 06:21:30,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:21:30,638 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-05 06:21:30,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:21:30,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919487502] [2022-04-05 06:21:30,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919487502] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:21:30,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549398973] [2022-04-05 06:21:30,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 06:21:30,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:21:30,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:21:30,639 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:21:30,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-04-05 06:21:30,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 06:21:30,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:21:30,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-05 06:21:30,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:21:31,291 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-05 06:21:31,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:21:31,986 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-05 06:21:31,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549398973] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:21:31,986 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:21:31,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 21, 21] total 57 [2022-04-05 06:21:31,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621477912] [2022-04-05 06:21:31,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:21:31,987 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-04-05 06:21:31,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:21:31,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-04-05 06:21:31,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=2989, Unknown=0, NotChecked=0, Total=3192 [2022-04-05 06:21:31,988 INFO L87 Difference]: Start difference. First operand 1658 states and 1838 transitions. Second operand has 57 states, 57 states have (on average 1.4385964912280702) internal successors, (82), 56 states have internal predecessors, (82), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:21:35,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:21:35,621 INFO L93 Difference]: Finished difference Result 1672 states and 1851 transitions. [2022-04-05 06:21:35,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-04-05 06:21:35,621 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.4385964912280702) internal successors, (82), 56 states have internal predecessors, (82), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 63 [2022-04-05 06:21:35,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:21:35,629 INFO L225 Difference]: With dead ends: 1672 [2022-04-05 06:21:35,629 INFO L226 Difference]: Without dead ends: 1642 [2022-04-05 06:21:35,643 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 92 SyntacticMatches, 6 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1105 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=580, Invalid=7252, Unknown=0, NotChecked=0, Total=7832 [2022-04-05 06:21:35,643 INFO L913 BasicCegarLoop]: 105 mSDtfsCounter, 1146 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 4441 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1161 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 4533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 4441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-04-05 06:21:35,643 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1161 Valid, 252 Invalid, 4533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 4441 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-04-05 06:21:35,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1642 states. [2022-04-05 06:21:36,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1642 to 1640. [2022-04-05 06:21:36,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1640 states, 1454 states have (on average 1.1127922971114168) internal successors, (1618), 1572 states have internal predecessors, (1618), 64 states have call successors, (64), 5 states have call predecessors, (64), 121 states have return successors, (124), 62 states have call predecessors, (124), 62 states have call successors, (124) [2022-04-05 06:21:36,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1640 states to 1640 states and 1806 transitions. [2022-04-05 06:21:36,443 INFO L78 Accepts]: Start accepts. Automaton has 1640 states and 1806 transitions. Word has length 63 [2022-04-05 06:21:36,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:21:36,443 INFO L478 AbstractCegarLoop]: Abstraction has 1640 states and 1806 transitions. [2022-04-05 06:21:36,443 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.4385964912280702) internal successors, (82), 56 states have internal predecessors, (82), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:21:36,443 INFO L276 IsEmpty]: Start isEmpty. Operand 1640 states and 1806 transitions. [2022-04-05 06:21:36,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-04-05 06:21:36,459 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:21:36,459 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:21:36,477 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2022-04-05 06:21:36,659 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:21:36,659 INFO L403 AbstractCegarLoop]: === Iteration 133 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:21:36,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:21:36,660 INFO L85 PathProgramCache]: Analyzing trace with hash -638931533, now seen corresponding path program 123 times [2022-04-05 06:21:36,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:21:36,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857924557] [2022-04-05 06:21:36,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:21:36,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:21:36,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:21:36,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:21:36,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:21:36,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:21:36,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:21:36,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-05 06:21:36,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:21:37,295 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:21:37,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:21:37,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857924557] [2022-04-05 06:21:37,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857924557] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:21:37,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026884301] [2022-04-05 06:21:37,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 06:21:37,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:21:37,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:21:37,296 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:21:37,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-04-05 06:21:37,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-04-05 06:21:37,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:21:37,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 40 conjunts are in the unsatisfiable core [2022-04-05 06:21:37,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:21:38,655 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:21:38,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:21:40,410 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:21:40,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026884301] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:21:40,410 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:21:40,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 35, 35] total 97 [2022-04-05 06:21:40,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049638055] [2022-04-05 06:21:40,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:21:40,411 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-04-05 06:21:40,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:21:40,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-04-05 06:21:40,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=8985, Unknown=0, NotChecked=0, Total=9312 [2022-04-05 06:21:40,412 INFO L87 Difference]: Start difference. First operand 1640 states and 1806 transitions. Second operand has 97 states, 97 states have (on average 1.3402061855670102) internal successors, (130), 96 states have internal predecessors, (130), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:21:49,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:21:49,836 INFO L93 Difference]: Finished difference Result 1814 states and 2009 transitions. [2022-04-05 06:21:49,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-04-05 06:21:49,837 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.3402061855670102) internal successors, (130), 96 states have internal predecessors, (130), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 64 [2022-04-05 06:21:49,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:21:49,861 INFO L225 Difference]: With dead ends: 1814 [2022-04-05 06:21:49,861 INFO L226 Difference]: Without dead ends: 1800 [2022-04-05 06:21:49,878 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3617 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=1330, Invalid=23162, Unknown=0, NotChecked=0, Total=24492 [2022-04-05 06:21:49,879 INFO L913 BasicCegarLoop]: 164 mSDtfsCounter, 2708 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 12532 mSolverCounterSat, 289 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2713 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 12821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 289 IncrementalHoareTripleChecker+Valid, 12532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-04-05 06:21:49,879 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2713 Valid, 426 Invalid, 12821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [289 Valid, 12532 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-04-05 06:21:49,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1800 states. [2022-04-05 06:21:50,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1800 to 1791. [2022-04-05 06:21:50,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1791 states, 1587 states have (on average 1.1121613106490233) internal successors, (1765), 1717 states have internal predecessors, (1765), 70 states have call successors, (70), 5 states have call predecessors, (70), 133 states have return successors, (142), 68 states have call predecessors, (142), 68 states have call successors, (142) [2022-04-05 06:21:50,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1791 states to 1791 states and 1977 transitions. [2022-04-05 06:21:50,822 INFO L78 Accepts]: Start accepts. Automaton has 1791 states and 1977 transitions. Word has length 64 [2022-04-05 06:21:50,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:21:50,822 INFO L478 AbstractCegarLoop]: Abstraction has 1791 states and 1977 transitions. [2022-04-05 06:21:50,822 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.3402061855670102) internal successors, (130), 96 states have internal predecessors, (130), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:21:50,822 INFO L276 IsEmpty]: Start isEmpty. Operand 1791 states and 1977 transitions. [2022-04-05 06:21:50,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-04-05 06:21:50,838 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:21:50,838 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:21:50,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2022-04-05 06:21:51,039 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:21:51,039 INFO L403 AbstractCegarLoop]: === Iteration 134 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:21:51,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:21:51,041 INFO L85 PathProgramCache]: Analyzing trace with hash -948079747, now seen corresponding path program 124 times [2022-04-05 06:21:51,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:21:51,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291585971] [2022-04-05 06:21:51,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:21:51,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:21:51,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:21:51,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:21:51,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:21:51,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:21:51,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:21:51,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-05 06:21:51,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:21:51,681 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:21:51,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:21:51,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291585971] [2022-04-05 06:21:51,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291585971] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:21:51,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305286851] [2022-04-05 06:21:51,682 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 06:21:51,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:21:51,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:21:51,683 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:21:51,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-04-05 06:21:51,801 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 06:21:51,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:21:51,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 40 conjunts are in the unsatisfiable core [2022-04-05 06:21:51,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:21:53,097 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:21:53,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:21:54,893 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:21:54,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305286851] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:21:54,893 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:21:54,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 35, 35] total 97 [2022-04-05 06:21:54,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720158944] [2022-04-05 06:21:54,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:21:54,894 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-04-05 06:21:54,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:21:54,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-04-05 06:21:54,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=8985, Unknown=0, NotChecked=0, Total=9312 [2022-04-05 06:21:54,896 INFO L87 Difference]: Start difference. First operand 1791 states and 1977 transitions. Second operand has 97 states, 97 states have (on average 1.3402061855670102) internal successors, (130), 96 states have internal predecessors, (130), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:22:04,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:22:04,342 INFO L93 Difference]: Finished difference Result 1806 states and 1992 transitions. [2022-04-05 06:22:04,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-04-05 06:22:04,342 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.3402061855670102) internal successors, (130), 96 states have internal predecessors, (130), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 64 [2022-04-05 06:22:04,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:22:04,352 INFO L225 Difference]: With dead ends: 1806 [2022-04-05 06:22:04,352 INFO L226 Difference]: Without dead ends: 1794 [2022-04-05 06:22:04,369 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3635 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=1330, Invalid=23162, Unknown=0, NotChecked=0, Total=24492 [2022-04-05 06:22:04,369 INFO L913 BasicCegarLoop]: 166 mSDtfsCounter, 2720 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 12536 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2749 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 12798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 12536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-04-05 06:22:04,369 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2749 Valid, 428 Invalid, 12798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 12536 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-04-05 06:22:04,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1794 states. [2022-04-05 06:22:05,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1794 to 1792. [2022-04-05 06:22:05,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1792 states, 1588 states have (on average 1.1120906801007557) internal successors, (1766), 1718 states have internal predecessors, (1766), 70 states have call successors, (70), 5 states have call predecessors, (70), 133 states have return successors, (135), 68 states have call predecessors, (135), 68 states have call successors, (135) [2022-04-05 06:22:05,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1792 states to 1792 states and 1971 transitions. [2022-04-05 06:22:05,281 INFO L78 Accepts]: Start accepts. Automaton has 1792 states and 1971 transitions. Word has length 64 [2022-04-05 06:22:05,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:22:05,281 INFO L478 AbstractCegarLoop]: Abstraction has 1792 states and 1971 transitions. [2022-04-05 06:22:05,281 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.3402061855670102) internal successors, (130), 96 states have internal predecessors, (130), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:22:05,281 INFO L276 IsEmpty]: Start isEmpty. Operand 1792 states and 1971 transitions. [2022-04-05 06:22:05,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-04-05 06:22:05,299 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:22:05,299 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:22:05,315 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2022-04-05 06:22:05,499 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2022-04-05 06:22:05,500 INFO L403 AbstractCegarLoop]: === Iteration 135 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:22:05,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:22:05,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1568531873, now seen corresponding path program 125 times [2022-04-05 06:22:05,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:22:05,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969075487] [2022-04-05 06:22:05,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:22:05,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:22:05,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:22:05,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:22:05,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:22:05,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:22:05,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:22:05,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-05 06:22:05,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:22:05,624 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-04-05 06:22:05,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:22:05,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969075487] [2022-04-05 06:22:05,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969075487] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:22:05,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432686388] [2022-04-05 06:22:05,624 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 06:22:05,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:22:05,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:22:05,625 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:22:05,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-04-05 06:22:05,746 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-04-05 06:22:05,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:22:05,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-05 06:22:05,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:22:05,963 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-04-05 06:22:05,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:22:06,047 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-04-05 06:22:06,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432686388] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:22:06,047 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:22:06,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 28 [2022-04-05 06:22:06,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17794257] [2022-04-05 06:22:06,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:22:06,047 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-05 06:22:06,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:22:06,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-05 06:22:06,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=503, Unknown=0, NotChecked=0, Total=756 [2022-04-05 06:22:06,048 INFO L87 Difference]: Start difference. First operand 1792 states and 1971 transitions. Second operand has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:22:07,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:22:07,769 INFO L93 Difference]: Finished difference Result 2699 states and 2926 transitions. [2022-04-05 06:22:07,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-04-05 06:22:07,770 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 64 [2022-04-05 06:22:07,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:22:07,809 INFO L225 Difference]: With dead ends: 2699 [2022-04-05 06:22:07,809 INFO L226 Difference]: Without dead ends: 1795 [2022-04-05 06:22:07,830 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1490 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1609, Invalid=3647, Unknown=0, NotChecked=0, Total=5256 [2022-04-05 06:22:07,830 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 109 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 06:22:07,830 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 102 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 671 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 06:22:07,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1795 states. [2022-04-05 06:22:08,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1795 to 1787. [2022-04-05 06:22:08,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1787 states, 1589 states have (on average 1.1095028319697924) internal successors, (1763), 1715 states have internal predecessors, (1763), 68 states have call successors, (68), 5 states have call predecessors, (68), 129 states have return successors, (129), 66 states have call predecessors, (129), 66 states have call successors, (129) [2022-04-05 06:22:08,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1787 states to 1787 states and 1960 transitions. [2022-04-05 06:22:08,792 INFO L78 Accepts]: Start accepts. Automaton has 1787 states and 1960 transitions. Word has length 64 [2022-04-05 06:22:08,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:22:08,793 INFO L478 AbstractCegarLoop]: Abstraction has 1787 states and 1960 transitions. [2022-04-05 06:22:08,793 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:22:08,793 INFO L276 IsEmpty]: Start isEmpty. Operand 1787 states and 1960 transitions. [2022-04-05 06:22:08,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-04-05 06:22:08,809 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:22:08,809 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:22:08,827 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2022-04-05 06:22:09,010 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2022-04-05 06:22:09,010 INFO L403 AbstractCegarLoop]: === Iteration 136 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:22:09,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:22:09,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1794187094, now seen corresponding path program 126 times [2022-04-05 06:22:09,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:22:09,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836136553] [2022-04-05 06:22:09,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:22:09,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:22:09,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:22:09,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:22:09,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:22:09,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:22:09,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:22:09,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-05 06:22:09,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:22:09,141 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-04-05 06:22:09,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:22:09,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836136553] [2022-04-05 06:22:09,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836136553] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:22:09,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792946229] [2022-04-05 06:22:09,141 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-05 06:22:09,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:22:09,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:22:09,142 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:22:09,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-04-05 06:22:09,264 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-05 06:22:09,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:22:09,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-05 06:22:09,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:22:09,424 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-04-05 06:22:09,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:22:09,501 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-04-05 06:22:09,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792946229] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:22:09,501 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:22:09,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 28 [2022-04-05 06:22:09,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084089425] [2022-04-05 06:22:09,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:22:09,502 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-05 06:22:09,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:22:09,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-05 06:22:09,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=503, Unknown=0, NotChecked=0, Total=756 [2022-04-05 06:22:09,502 INFO L87 Difference]: Start difference. First operand 1787 states and 1960 transitions. Second operand has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-05 06:22:11,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:22:11,170 INFO L93 Difference]: Finished difference Result 1853 states and 2040 transitions. [2022-04-05 06:22:11,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-04-05 06:22:11,171 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 64 [2022-04-05 06:22:11,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:22:11,179 INFO L225 Difference]: With dead ends: 1853 [2022-04-05 06:22:11,179 INFO L226 Difference]: Without dead ends: 1802 [2022-04-05 06:22:11,196 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1490 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1609, Invalid=3647, Unknown=0, NotChecked=0, Total=5256 [2022-04-05 06:22:11,196 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 121 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 06:22:11,196 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 97 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 06:22:11,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1802 states. [2022-04-05 06:22:12,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1802 to 1802. [2022-04-05 06:22:12,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1802 states, 1604 states have (on average 1.1084788029925188) internal successors, (1778), 1730 states have internal predecessors, (1778), 68 states have call successors, (68), 5 states have call predecessors, (68), 129 states have return successors, (129), 66 states have call predecessors, (129), 66 states have call successors, (129) [2022-04-05 06:22:12,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1802 states to 1802 states and 1975 transitions. [2022-04-05 06:22:12,169 INFO L78 Accepts]: Start accepts. Automaton has 1802 states and 1975 transitions. Word has length 64 [2022-04-05 06:22:12,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:22:12,169 INFO L478 AbstractCegarLoop]: Abstraction has 1802 states and 1975 transitions. [2022-04-05 06:22:12,169 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-05 06:22:12,169 INFO L276 IsEmpty]: Start isEmpty. Operand 1802 states and 1975 transitions. [2022-04-05 06:22:12,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-05 06:22:12,186 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:22:12,186 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:22:12,202 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2022-04-05 06:22:12,386 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2022-04-05 06:22:12,387 INFO L403 AbstractCegarLoop]: === Iteration 137 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:22:12,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:22:12,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1751293918, now seen corresponding path program 127 times [2022-04-05 06:22:12,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:22:12,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137098185] [2022-04-05 06:22:12,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:22:12,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:22:12,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:22:12,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:22:12,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:22:12,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:22:12,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:22:12,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-05 06:22:12,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:22:13,200 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 06:22:13,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:22:13,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137098185] [2022-04-05 06:22:13,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137098185] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:22:13,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182607680] [2022-04-05 06:22:13,200 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-05 06:22:13,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:22:13,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:22:13,202 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:22:13,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-04-05 06:22:13,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:22:13,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 87 conjunts are in the unsatisfiable core [2022-04-05 06:22:13,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:22:13,722 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 06:22:13,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:22:13,993 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 06:22:13,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182607680] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:22:13,993 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:22:13,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 53 [2022-04-05 06:22:13,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490087406] [2022-04-05 06:22:13,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:22:13,993 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-04-05 06:22:13,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:22:13,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-04-05 06:22:13,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=2643, Unknown=0, NotChecked=0, Total=2756 [2022-04-05 06:22:13,994 INFO L87 Difference]: Start difference. First operand 1802 states and 1975 transitions. Second operand has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:22:19,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:22:19,396 INFO L93 Difference]: Finished difference Result 1980 states and 2172 transitions. [2022-04-05 06:22:19,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-04-05 06:22:19,396 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 65 [2022-04-05 06:22:19,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:22:19,410 INFO L225 Difference]: With dead ends: 1980 [2022-04-05 06:22:19,410 INFO L226 Difference]: Without dead ends: 1974 [2022-04-05 06:22:19,428 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 124 SyntacticMatches, 5 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1267 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=325, Invalid=9181, Unknown=0, NotChecked=0, Total=9506 [2022-04-05 06:22:19,429 INFO L913 BasicCegarLoop]: 166 mSDtfsCounter, 355 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 12132 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 12202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 12132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-04-05 06:22:19,429 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 403 Invalid, 12202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 12132 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-04-05 06:22:19,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1974 states. [2022-04-05 06:22:20,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1974 to 1818. [2022-04-05 06:22:20,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1818 states, 1617 states have (on average 1.1088435374149659) internal successors, (1793), 1745 states have internal predecessors, (1793), 69 states have call successors, (69), 5 states have call predecessors, (69), 131 states have return successors, (132), 67 states have call predecessors, (132), 67 states have call successors, (132) [2022-04-05 06:22:20,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 1994 transitions. [2022-04-05 06:22:20,478 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 1994 transitions. Word has length 65 [2022-04-05 06:22:20,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:22:20,478 INFO L478 AbstractCegarLoop]: Abstraction has 1818 states and 1994 transitions. [2022-04-05 06:22:20,479 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:22:20,479 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 1994 transitions. [2022-04-05 06:22:20,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-05 06:22:20,496 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:22:20,496 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:22:20,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2022-04-05 06:22:20,696 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2022-04-05 06:22:20,696 INFO L403 AbstractCegarLoop]: === Iteration 138 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:22:20,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:22:20,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1821862311, now seen corresponding path program 128 times [2022-04-05 06:22:20,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:22:20,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927446922] [2022-04-05 06:22:20,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:22:20,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:22:20,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:22:20,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:22:20,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:22:20,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:22:20,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:22:21,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-05 06:22:21,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:22:21,465 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 188 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-05 06:22:21,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:22:21,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927446922] [2022-04-05 06:22:21,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927446922] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:22:21,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312904877] [2022-04-05 06:22:21,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 06:22:21,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:22:21,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:22:21,467 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:22:21,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-04-05 06:22:21,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 06:22:21,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:22:21,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 83 conjunts are in the unsatisfiable core [2022-04-05 06:22:21,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:22:22,098 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 188 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-05 06:22:22,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:22:22,408 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 188 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-05 06:22:22,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312904877] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:22:22,408 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:22:22,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 53 [2022-04-05 06:22:22,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74276358] [2022-04-05 06:22:22,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:22:22,408 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-04-05 06:22:22,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:22:22,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-04-05 06:22:22,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=2639, Unknown=0, NotChecked=0, Total=2756 [2022-04-05 06:22:22,409 INFO L87 Difference]: Start difference. First operand 1818 states and 1994 transitions. Second operand has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:22:27,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:22:27,361 INFO L93 Difference]: Finished difference Result 1824 states and 1999 transitions. [2022-04-05 06:22:27,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-04-05 06:22:27,362 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 65 [2022-04-05 06:22:27,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:22:27,371 INFO L225 Difference]: With dead ends: 1824 [2022-04-05 06:22:27,371 INFO L226 Difference]: Without dead ends: 1802 [2022-04-05 06:22:27,388 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 118 SyntacticMatches, 9 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1286 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=327, Invalid=8793, Unknown=0, NotChecked=0, Total=9120 [2022-04-05 06:22:27,388 INFO L913 BasicCegarLoop]: 154 mSDtfsCounter, 270 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 10689 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 10737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 10689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-04-05 06:22:27,388 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 381 Invalid, 10737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 10689 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-04-05 06:22:27,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1802 states. [2022-04-05 06:22:28,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1802 to 1802. [2022-04-05 06:22:28,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1802 states, 1604 states have (on average 1.1084788029925188) internal successors, (1778), 1730 states have internal predecessors, (1778), 68 states have call successors, (68), 5 states have call predecessors, (68), 129 states have return successors, (130), 66 states have call predecessors, (130), 66 states have call successors, (130) [2022-04-05 06:22:28,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1802 states to 1802 states and 1976 transitions. [2022-04-05 06:22:28,338 INFO L78 Accepts]: Start accepts. Automaton has 1802 states and 1976 transitions. Word has length 65 [2022-04-05 06:22:28,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:22:28,338 INFO L478 AbstractCegarLoop]: Abstraction has 1802 states and 1976 transitions. [2022-04-05 06:22:28,338 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:22:28,338 INFO L276 IsEmpty]: Start isEmpty. Operand 1802 states and 1976 transitions. [2022-04-05 06:22:28,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-05 06:22:28,355 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:22:28,355 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:22:28,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2022-04-05 06:22:28,556 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2022-04-05 06:22:28,556 INFO L403 AbstractCegarLoop]: === Iteration 139 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:22:28,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:22:28,556 INFO L85 PathProgramCache]: Analyzing trace with hash -2021511230, now seen corresponding path program 129 times [2022-04-05 06:22:28,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:22:28,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956294618] [2022-04-05 06:22:28,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:22:28,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:22:28,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:22:28,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:22:28,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:22:28,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:22:28,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:22:28,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-05 06:22:28,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:22:29,250 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 06:22:29,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:22:29,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956294618] [2022-04-05 06:22:29,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956294618] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:22:29,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757217110] [2022-04-05 06:22:29,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 06:22:29,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:22:29,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:22:29,252 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:22:29,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-04-05 06:22:29,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-04-05 06:22:29,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:22:29,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 79 conjunts are in the unsatisfiable core [2022-04-05 06:22:29,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:22:29,931 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 06:22:29,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:22:30,228 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 06:22:30,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757217110] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:22:30,229 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:22:30,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 53 [2022-04-05 06:22:30,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443177906] [2022-04-05 06:22:30,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:22:30,229 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-04-05 06:22:30,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:22:30,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-04-05 06:22:30,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=2635, Unknown=0, NotChecked=0, Total=2756 [2022-04-05 06:22:30,230 INFO L87 Difference]: Start difference. First operand 1802 states and 1976 transitions. Second operand has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:22:34,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:22:34,632 INFO L93 Difference]: Finished difference Result 1808 states and 1981 transitions. [2022-04-05 06:22:34,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-04-05 06:22:34,633 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 65 [2022-04-05 06:22:34,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:22:34,643 INFO L225 Difference]: With dead ends: 1808 [2022-04-05 06:22:34,643 INFO L226 Difference]: Without dead ends: 1784 [2022-04-05 06:22:34,661 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 116 SyntacticMatches, 9 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1291 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=329, Invalid=8413, Unknown=0, NotChecked=0, Total=8742 [2022-04-05 06:22:34,661 INFO L913 BasicCegarLoop]: 134 mSDtfsCounter, 234 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 9348 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 9396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 9348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-04-05 06:22:34,661 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 361 Invalid, 9396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 9348 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-04-05 06:22:34,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1784 states. [2022-04-05 06:22:35,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1784 to 1784. [2022-04-05 06:22:35,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1784 states, 1589 states have (on average 1.1082441787287602) internal successors, (1761), 1713 states have internal predecessors, (1761), 67 states have call successors, (67), 5 states have call predecessors, (67), 127 states have return successors, (128), 65 states have call predecessors, (128), 65 states have call successors, (128) [2022-04-05 06:22:35,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1784 states to 1784 states and 1956 transitions. [2022-04-05 06:22:35,711 INFO L78 Accepts]: Start accepts. Automaton has 1784 states and 1956 transitions. Word has length 65 [2022-04-05 06:22:35,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:22:35,711 INFO L478 AbstractCegarLoop]: Abstraction has 1784 states and 1956 transitions. [2022-04-05 06:22:35,711 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:22:35,711 INFO L276 IsEmpty]: Start isEmpty. Operand 1784 states and 1956 transitions. [2022-04-05 06:22:35,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-05 06:22:35,729 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:22:35,729 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:22:35,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2022-04-05 06:22:35,929 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2022-04-05 06:22:35,930 INFO L403 AbstractCegarLoop]: === Iteration 140 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:22:35,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:22:35,930 INFO L85 PathProgramCache]: Analyzing trace with hash 383561223, now seen corresponding path program 130 times [2022-04-05 06:22:35,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:22:35,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481116982] [2022-04-05 06:22:35,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:22:35,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:22:35,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:22:35,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:22:35,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:22:35,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:22:35,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:22:36,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-05 06:22:36,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:22:36,598 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-05 06:22:36,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:22:36,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481116982] [2022-04-05 06:22:36,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481116982] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:22:36,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829680770] [2022-04-05 06:22:36,598 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 06:22:36,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:22:36,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:22:36,599 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:22:36,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-04-05 06:22:36,717 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 06:22:36,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:22:36,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 75 conjunts are in the unsatisfiable core [2022-04-05 06:22:36,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:22:37,304 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-05 06:22:37,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:22:37,588 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-05 06:22:37,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829680770] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:22:37,589 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:22:37,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 53 [2022-04-05 06:22:37,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636186266] [2022-04-05 06:22:37,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:22:37,589 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-04-05 06:22:37,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:22:37,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-04-05 06:22:37,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=2631, Unknown=0, NotChecked=0, Total=2756 [2022-04-05 06:22:37,590 INFO L87 Difference]: Start difference. First operand 1784 states and 1956 transitions. Second operand has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:22:41,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:22:41,418 INFO L93 Difference]: Finished difference Result 1790 states and 1961 transitions. [2022-04-05 06:22:41,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-04-05 06:22:41,419 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 65 [2022-04-05 06:22:41,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:22:41,429 INFO L225 Difference]: With dead ends: 1790 [2022-04-05 06:22:41,429 INFO L226 Difference]: Without dead ends: 1764 [2022-04-05 06:22:41,449 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 114 SyntacticMatches, 9 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1296 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=331, Invalid=8041, Unknown=0, NotChecked=0, Total=8372 [2022-04-05 06:22:41,449 INFO L913 BasicCegarLoop]: 114 mSDtfsCounter, 198 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 7476 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 7522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 7476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-04-05 06:22:41,449 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 326 Invalid, 7522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 7476 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-04-05 06:22:41,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1764 states. [2022-04-05 06:22:42,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1764 to 1764. [2022-04-05 06:22:42,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1764 states, 1572 states have (on average 1.1081424936386768) internal successors, (1742), 1694 states have internal predecessors, (1742), 66 states have call successors, (66), 5 states have call predecessors, (66), 125 states have return successors, (126), 64 states have call predecessors, (126), 64 states have call successors, (126) [2022-04-05 06:22:42,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1764 states to 1764 states and 1934 transitions. [2022-04-05 06:22:42,540 INFO L78 Accepts]: Start accepts. Automaton has 1764 states and 1934 transitions. Word has length 65 [2022-04-05 06:22:42,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:22:42,540 INFO L478 AbstractCegarLoop]: Abstraction has 1764 states and 1934 transitions. [2022-04-05 06:22:42,540 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:22:42,540 INFO L276 IsEmpty]: Start isEmpty. Operand 1764 states and 1934 transitions. [2022-04-05 06:22:42,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-05 06:22:42,557 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:22:42,557 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:22:42,575 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Ended with exit code 0 [2022-04-05 06:22:42,766 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:22:42,767 INFO L403 AbstractCegarLoop]: === Iteration 141 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:22:42,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:22:42,767 INFO L85 PathProgramCache]: Analyzing trace with hash -2049878174, now seen corresponding path program 131 times [2022-04-05 06:22:42,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:22:42,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565857986] [2022-04-05 06:22:42,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:22:42,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:22:42,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:22:42,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:22:42,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:22:42,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:22:42,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:22:43,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-05 06:22:43,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:22:43,348 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-05 06:22:43,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:22:43,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565857986] [2022-04-05 06:22:43,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565857986] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:22:43,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526056918] [2022-04-05 06:22:43,348 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 06:22:43,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:22:43,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:22:43,349 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:22:43,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-04-05 06:22:43,468 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-04-05 06:22:43,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:22:43,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 71 conjunts are in the unsatisfiable core [2022-04-05 06:22:43,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:22:44,111 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-05 06:22:44,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:22:44,383 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-05 06:22:44,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526056918] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:22:44,383 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:22:44,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 53 [2022-04-05 06:22:44,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994985699] [2022-04-05 06:22:44,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:22:44,384 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-04-05 06:22:44,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:22:44,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-04-05 06:22:44,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=2627, Unknown=0, NotChecked=0, Total=2756 [2022-04-05 06:22:44,385 INFO L87 Difference]: Start difference. First operand 1764 states and 1934 transitions. Second operand has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:22:47,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:22:47,838 INFO L93 Difference]: Finished difference Result 1770 states and 1939 transitions. [2022-04-05 06:22:47,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-05 06:22:47,839 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 65 [2022-04-05 06:22:47,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:22:47,847 INFO L225 Difference]: With dead ends: 1770 [2022-04-05 06:22:47,847 INFO L226 Difference]: Without dead ends: 1742 [2022-04-05 06:22:47,863 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 112 SyntacticMatches, 9 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1301 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=333, Invalid=7677, Unknown=0, NotChecked=0, Total=8010 [2022-04-05 06:22:47,864 INFO L913 BasicCegarLoop]: 94 mSDtfsCounter, 162 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 6081 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 6125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 6081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-04-05 06:22:47,864 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 301 Invalid, 6125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 6081 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-04-05 06:22:47,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1742 states. [2022-04-05 06:22:48,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1742 to 1742. [2022-04-05 06:22:48,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1742 states, 1553 states have (on average 1.1081777205408887) internal successors, (1721), 1673 states have internal predecessors, (1721), 65 states have call successors, (65), 5 states have call predecessors, (65), 123 states have return successors, (124), 63 states have call predecessors, (124), 63 states have call successors, (124) [2022-04-05 06:22:48,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1742 states to 1742 states and 1910 transitions. [2022-04-05 06:22:48,791 INFO L78 Accepts]: Start accepts. Automaton has 1742 states and 1910 transitions. Word has length 65 [2022-04-05 06:22:48,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:22:48,792 INFO L478 AbstractCegarLoop]: Abstraction has 1742 states and 1910 transitions. [2022-04-05 06:22:48,792 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:22:48,792 INFO L276 IsEmpty]: Start isEmpty. Operand 1742 states and 1910 transitions. [2022-04-05 06:22:48,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-05 06:22:48,808 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:22:48,808 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:22:48,825 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2022-04-05 06:22:49,008 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:22:49,009 INFO L403 AbstractCegarLoop]: === Iteration 142 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:22:49,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:22:49,009 INFO L85 PathProgramCache]: Analyzing trace with hash -443901337, now seen corresponding path program 132 times [2022-04-05 06:22:49,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:22:49,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779207709] [2022-04-05 06:22:49,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:22:49,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:22:49,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:22:49,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:22:49,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:22:49,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:22:49,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:22:49,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-05 06:22:49,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:22:49,580 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-05 06:22:49,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:22:49,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779207709] [2022-04-05 06:22:49,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779207709] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:22:49,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609245044] [2022-04-05 06:22:49,581 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-05 06:22:49,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:22:49,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:22:49,582 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:22:49,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-04-05 06:22:49,703 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-05 06:22:49,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:22:49,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 67 conjunts are in the unsatisfiable core [2022-04-05 06:22:49,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:22:50,421 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-05 06:22:50,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:22:50,692 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-05 06:22:50,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609245044] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:22:50,693 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:22:50,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 53 [2022-04-05 06:22:50,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331849959] [2022-04-05 06:22:50,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:22:50,693 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-04-05 06:22:50,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:22:50,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-04-05 06:22:50,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=2623, Unknown=0, NotChecked=0, Total=2756 [2022-04-05 06:22:50,694 INFO L87 Difference]: Start difference. First operand 1742 states and 1910 transitions. Second operand has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:22:53,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:22:53,473 INFO L93 Difference]: Finished difference Result 1748 states and 1915 transitions. [2022-04-05 06:22:53,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-05 06:22:53,474 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 65 [2022-04-05 06:22:53,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:22:53,482 INFO L225 Difference]: With dead ends: 1748 [2022-04-05 06:22:53,482 INFO L226 Difference]: Without dead ends: 1718 [2022-04-05 06:22:53,538 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 110 SyntacticMatches, 9 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1306 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=335, Invalid=7321, Unknown=0, NotChecked=0, Total=7656 [2022-04-05 06:22:53,539 INFO L913 BasicCegarLoop]: 74 mSDtfsCounter, 127 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 4305 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 4347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 4305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-05 06:22:53,539 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 256 Invalid, 4347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 4305 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-05 06:22:53,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1718 states. [2022-04-05 06:22:54,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1718 to 1718. [2022-04-05 06:22:54,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1718 states, 1532 states have (on average 1.108355091383812) internal successors, (1698), 1650 states have internal predecessors, (1698), 64 states have call successors, (64), 5 states have call predecessors, (64), 121 states have return successors, (122), 62 states have call predecessors, (122), 62 states have call successors, (122) [2022-04-05 06:22:54,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1718 states to 1718 states and 1884 transitions. [2022-04-05 06:22:54,466 INFO L78 Accepts]: Start accepts. Automaton has 1718 states and 1884 transitions. Word has length 65 [2022-04-05 06:22:54,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:22:54,466 INFO L478 AbstractCegarLoop]: Abstraction has 1718 states and 1884 transitions. [2022-04-05 06:22:54,467 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:22:54,467 INFO L276 IsEmpty]: Start isEmpty. Operand 1718 states and 1884 transitions. [2022-04-05 06:22:54,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-05 06:22:54,484 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:22:54,484 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:22:54,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2022-04-05 06:22:54,702 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:22:54,702 INFO L403 AbstractCegarLoop]: === Iteration 143 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:22:54,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:22:54,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1237002494, now seen corresponding path program 133 times [2022-04-05 06:22:54,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:22:54,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510839558] [2022-04-05 06:22:54,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:22:54,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:22:54,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:22:54,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:22:54,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:22:54,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:22:54,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:22:54,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-05 06:22:54,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:22:55,231 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-05 06:22:55,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:22:55,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510839558] [2022-04-05 06:22:55,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510839558] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:22:55,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678500271] [2022-04-05 06:22:55,231 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-05 06:22:55,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:22:55,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:22:55,232 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:22:55,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-04-05 06:22:55,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:22:55,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 63 conjunts are in the unsatisfiable core [2022-04-05 06:22:55,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:22:56,127 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-05 06:22:56,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:22:56,394 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-05 06:22:56,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678500271] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:22:56,394 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:22:56,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 53 [2022-04-05 06:22:56,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072950105] [2022-04-05 06:22:56,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:22:56,394 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-04-05 06:22:56,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:22:56,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-04-05 06:22:56,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=2619, Unknown=0, NotChecked=0, Total=2756 [2022-04-05 06:22:56,395 INFO L87 Difference]: Start difference. First operand 1718 states and 1884 transitions. Second operand has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:22:58,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:22:58,886 INFO L93 Difference]: Finished difference Result 1724 states and 1889 transitions. [2022-04-05 06:22:58,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-05 06:22:58,886 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 65 [2022-04-05 06:22:58,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:22:58,895 INFO L225 Difference]: With dead ends: 1724 [2022-04-05 06:22:58,895 INFO L226 Difference]: Without dead ends: 1692 [2022-04-05 06:22:58,911 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 108 SyntacticMatches, 9 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1311 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=337, Invalid=6973, Unknown=0, NotChecked=0, Total=7310 [2022-04-05 06:22:58,911 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 90 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 3601 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 3641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 3601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-05 06:22:58,911 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 256 Invalid, 3641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 3601 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-05 06:22:58,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1692 states. [2022-04-05 06:22:59,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1692 to 1692. [2022-04-05 06:22:59,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1692 states, 1509 states have (on average 1.1086812458581843) internal successors, (1673), 1625 states have internal predecessors, (1673), 63 states have call successors, (63), 5 states have call predecessors, (63), 119 states have return successors, (120), 61 states have call predecessors, (120), 61 states have call successors, (120) [2022-04-05 06:22:59,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1692 states to 1692 states and 1856 transitions. [2022-04-05 06:22:59,791 INFO L78 Accepts]: Start accepts. Automaton has 1692 states and 1856 transitions. Word has length 65 [2022-04-05 06:22:59,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:22:59,791 INFO L478 AbstractCegarLoop]: Abstraction has 1692 states and 1856 transitions. [2022-04-05 06:22:59,791 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:22:59,791 INFO L276 IsEmpty]: Start isEmpty. Operand 1692 states and 1856 transitions. [2022-04-05 06:22:59,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-05 06:22:59,806 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:22:59,806 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:22:59,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2022-04-05 06:23:00,007 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:23:00,007 INFO L403 AbstractCegarLoop]: === Iteration 144 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:23:00,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:23:00,007 INFO L85 PathProgramCache]: Analyzing trace with hash -299422009, now seen corresponding path program 134 times [2022-04-05 06:23:00,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:23:00,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628511727] [2022-04-05 06:23:00,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:23:00,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:23:00,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:23:00,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:23:00,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:23:00,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:23:00,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:23:00,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-05 06:23:00,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:23:00,468 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-04-05 06:23:00,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:23:00,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628511727] [2022-04-05 06:23:00,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628511727] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:23:00,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563106435] [2022-04-05 06:23:00,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 06:23:00,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:23:00,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:23:00,470 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:23:00,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-04-05 06:23:00,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 06:23:00,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:23:00,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 59 conjunts are in the unsatisfiable core [2022-04-05 06:23:00,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:23:01,440 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-04-05 06:23:01,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:23:01,710 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-04-05 06:23:01,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563106435] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:23:01,710 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:23:01,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 53 [2022-04-05 06:23:01,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251040167] [2022-04-05 06:23:01,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:23:01,710 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-04-05 06:23:01,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:23:01,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-04-05 06:23:01,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=2615, Unknown=0, NotChecked=0, Total=2756 [2022-04-05 06:23:01,711 INFO L87 Difference]: Start difference. First operand 1692 states and 1856 transitions. Second operand has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:23:03,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:23:03,677 INFO L93 Difference]: Finished difference Result 1710 states and 1877 transitions. [2022-04-05 06:23:03,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-05 06:23:03,678 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 65 [2022-04-05 06:23:03,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:23:03,694 INFO L225 Difference]: With dead ends: 1710 [2022-04-05 06:23:03,694 INFO L226 Difference]: Without dead ends: 1704 [2022-04-05 06:23:03,714 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 106 SyntacticMatches, 9 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1316 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=339, Invalid=6633, Unknown=0, NotChecked=0, Total=6972 [2022-04-05 06:23:03,714 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 56 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 1962 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 2002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-05 06:23:03,714 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 196 Invalid, 2002 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1962 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-05 06:23:03,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1704 states. [2022-04-05 06:23:04,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1704 to 1702. [2022-04-05 06:23:04,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1702 states, 1516 states have (on average 1.1094986807387863) internal successors, (1682), 1634 states have internal predecessors, (1682), 64 states have call successors, (64), 5 states have call predecessors, (64), 121 states have return successors, (123), 62 states have call predecessors, (123), 62 states have call successors, (123) [2022-04-05 06:23:04,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1702 states to 1702 states and 1869 transitions. [2022-04-05 06:23:04,656 INFO L78 Accepts]: Start accepts. Automaton has 1702 states and 1869 transitions. Word has length 65 [2022-04-05 06:23:04,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:23:04,656 INFO L478 AbstractCegarLoop]: Abstraction has 1702 states and 1869 transitions. [2022-04-05 06:23:04,657 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:23:04,657 INFO L276 IsEmpty]: Start isEmpty. Operand 1702 states and 1869 transitions. [2022-04-05 06:23:04,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-04-05 06:23:04,672 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:23:04,672 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:23:04,691 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2022-04-05 06:23:04,873 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:23:04,873 INFO L403 AbstractCegarLoop]: === Iteration 145 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:23:04,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:23:04,873 INFO L85 PathProgramCache]: Analyzing trace with hash -881129443, now seen corresponding path program 135 times [2022-04-05 06:23:04,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:23:04,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619236247] [2022-04-05 06:23:04,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:23:04,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:23:04,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:23:04,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:23:04,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:23:04,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:23:04,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:23:05,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-05 06:23:05,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:23:05,605 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:23:05,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:23:05,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619236247] [2022-04-05 06:23:05,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619236247] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:23:05,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461204934] [2022-04-05 06:23:05,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 06:23:05,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:23:05,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:23:05,606 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:23:05,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-04-05 06:23:05,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-04-05 06:23:05,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:23:05,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 42 conjunts are in the unsatisfiable core [2022-04-05 06:23:05,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:23:07,153 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:23:07,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:23:09,147 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:23:09,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461204934] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:23:09,147 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:23:09,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 37, 37] total 103 [2022-04-05 06:23:09,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465202370] [2022-04-05 06:23:09,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:23:09,147 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-04-05 06:23:09,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:23:09,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-04-05 06:23:09,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=10158, Unknown=0, NotChecked=0, Total=10506 [2022-04-05 06:23:09,148 INFO L87 Difference]: Start difference. First operand 1702 states and 1869 transitions. Second operand has 103 states, 103 states have (on average 1.3203883495145632) internal successors, (136), 102 states have internal predecessors, (136), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:23:20,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:23:20,192 INFO L93 Difference]: Finished difference Result 1878 states and 2074 transitions. [2022-04-05 06:23:20,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-04-05 06:23:20,192 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 1.3203883495145632) internal successors, (136), 102 states have internal predecessors, (136), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 66 [2022-04-05 06:23:20,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:23:20,219 INFO L225 Difference]: With dead ends: 1878 [2022-04-05 06:23:20,219 INFO L226 Difference]: Without dead ends: 1864 [2022-04-05 06:23:20,239 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4114 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=1466, Invalid=26256, Unknown=0, NotChecked=0, Total=27722 [2022-04-05 06:23:20,239 INFO L913 BasicCegarLoop]: 174 mSDtfsCounter, 3049 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 14660 mSolverCounterSat, 324 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3054 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 14984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 324 IncrementalHoareTripleChecker+Valid, 14660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-04-05 06:23:20,239 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3054 Valid, 476 Invalid, 14984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [324 Valid, 14660 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-04-05 06:23:20,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1864 states. [2022-04-05 06:23:21,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1864 to 1855. [2022-04-05 06:23:21,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1855 states, 1651 states have (on average 1.1090248334342823) internal successors, (1831), 1781 states have internal predecessors, (1831), 70 states have call successors, (70), 5 states have call predecessors, (70), 133 states have return successors, (141), 68 states have call predecessors, (141), 68 states have call successors, (141) [2022-04-05 06:23:21,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1855 states to 1855 states and 2042 transitions. [2022-04-05 06:23:21,299 INFO L78 Accepts]: Start accepts. Automaton has 1855 states and 2042 transitions. Word has length 66 [2022-04-05 06:23:21,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:23:21,299 INFO L478 AbstractCegarLoop]: Abstraction has 1855 states and 2042 transitions. [2022-04-05 06:23:21,299 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 1.3203883495145632) internal successors, (136), 102 states have internal predecessors, (136), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:23:21,299 INFO L276 IsEmpty]: Start isEmpty. Operand 1855 states and 2042 transitions. [2022-04-05 06:23:21,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-04-05 06:23:21,316 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:23:21,316 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:23:21,332 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0 [2022-04-05 06:23:21,516 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:23:21,516 INFO L403 AbstractCegarLoop]: === Iteration 146 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:23:21,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:23:21,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1874789485, now seen corresponding path program 136 times [2022-04-05 06:23:21,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:23:21,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752302921] [2022-04-05 06:23:21,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:23:21,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:23:21,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:23:21,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:23:21,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:23:21,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:23:21,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:23:21,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-05 06:23:21,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:23:22,235 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:23:22,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:23:22,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752302921] [2022-04-05 06:23:22,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752302921] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:23:22,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706286836] [2022-04-05 06:23:22,236 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 06:23:22,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:23:22,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:23:22,237 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:23:22,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-04-05 06:23:22,366 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 06:23:22,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:23:22,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 42 conjunts are in the unsatisfiable core [2022-04-05 06:23:22,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:23:23,815 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:23:23,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:23:25,824 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:23:25,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706286836] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:23:25,825 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:23:25,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 37, 37] total 103 [2022-04-05 06:23:25,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861278567] [2022-04-05 06:23:25,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:23:25,825 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-04-05 06:23:25,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:23:25,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-04-05 06:23:25,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=10158, Unknown=0, NotChecked=0, Total=10506 [2022-04-05 06:23:25,827 INFO L87 Difference]: Start difference. First operand 1855 states and 2042 transitions. Second operand has 103 states, 103 states have (on average 1.3203883495145632) internal successors, (136), 102 states have internal predecessors, (136), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:23:37,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:23:37,106 INFO L93 Difference]: Finished difference Result 1870 states and 2057 transitions. [2022-04-05 06:23:37,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-04-05 06:23:37,106 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 1.3203883495145632) internal successors, (136), 102 states have internal predecessors, (136), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 66 [2022-04-05 06:23:37,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:23:37,116 INFO L225 Difference]: With dead ends: 1870 [2022-04-05 06:23:37,116 INFO L226 Difference]: Without dead ends: 1858 [2022-04-05 06:23:37,156 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4133 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=1466, Invalid=26256, Unknown=0, NotChecked=0, Total=27722 [2022-04-05 06:23:37,157 INFO L913 BasicCegarLoop]: 176 mSDtfsCounter, 2999 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 15424 mSolverCounterSat, 295 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3030 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 15719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 295 IncrementalHoareTripleChecker+Valid, 15424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-04-05 06:23:37,157 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3030 Valid, 488 Invalid, 15719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [295 Valid, 15424 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-04-05 06:23:37,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2022-04-05 06:23:38,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 1856. [2022-04-05 06:23:38,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1856 states, 1652 states have (on average 1.1089588377723971) internal successors, (1832), 1782 states have internal predecessors, (1832), 70 states have call successors, (70), 5 states have call predecessors, (70), 133 states have return successors, (134), 68 states have call predecessors, (134), 68 states have call successors, (134) [2022-04-05 06:23:38,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1856 states to 1856 states and 2036 transitions. [2022-04-05 06:23:38,214 INFO L78 Accepts]: Start accepts. Automaton has 1856 states and 2036 transitions. Word has length 66 [2022-04-05 06:23:38,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:23:38,214 INFO L478 AbstractCegarLoop]: Abstraction has 1856 states and 2036 transitions. [2022-04-05 06:23:38,214 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 1.3203883495145632) internal successors, (136), 102 states have internal predecessors, (136), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:23:38,214 INFO L276 IsEmpty]: Start isEmpty. Operand 1856 states and 2036 transitions. [2022-04-05 06:23:38,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-04-05 06:23:38,232 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:23:38,232 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:23:38,247 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2022-04-05 06:23:38,435 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2022-04-05 06:23:38,435 INFO L403 AbstractCegarLoop]: === Iteration 147 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:23:38,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:23:38,436 INFO L85 PathProgramCache]: Analyzing trace with hash -776794762, now seen corresponding path program 137 times [2022-04-05 06:23:38,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:23:38,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974349268] [2022-04-05 06:23:38,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:23:38,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:23:38,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:23:38,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:23:38,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:23:38,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:23:38,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:23:38,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-05 06:23:38,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:23:38,569 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-04-05 06:23:38,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:23:38,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974349268] [2022-04-05 06:23:38,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974349268] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:23:38,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227878802] [2022-04-05 06:23:38,569 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 06:23:38,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:23:38,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:23:38,570 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:23:38,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-04-05 06:23:38,699 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-04-05 06:23:38,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:23:38,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-05 06:23:38,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:23:38,891 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-04-05 06:23:38,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:23:38,973 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-04-05 06:23:38,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227878802] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:23:38,973 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:23:38,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 30 [2022-04-05 06:23:38,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344647863] [2022-04-05 06:23:38,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:23:38,973 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-04-05 06:23:38,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:23:38,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-04-05 06:23:38,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=651, Unknown=0, NotChecked=0, Total=870 [2022-04-05 06:23:38,974 INFO L87 Difference]: Start difference. First operand 1856 states and 2036 transitions. Second operand has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 29 states have internal predecessors, (55), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-05 06:23:41,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:23:41,012 INFO L93 Difference]: Finished difference Result 2152 states and 2381 transitions. [2022-04-05 06:23:41,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-04-05 06:23:41,012 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 29 states have internal predecessors, (55), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 66 [2022-04-05 06:23:41,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:23:41,023 INFO L225 Difference]: With dead ends: 2152 [2022-04-05 06:23:41,023 INFO L226 Difference]: Without dead ends: 2082 [2022-04-05 06:23:41,092 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1578 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1673, Invalid=5299, Unknown=0, NotChecked=0, Total=6972 [2022-04-05 06:23:41,092 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 278 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 06:23:41,092 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 92 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 709 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 06:23:41,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2082 states. [2022-04-05 06:23:42,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2082 to 2034. [2022-04-05 06:23:42,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2034 states, 1830 states have (on average 1.1076502732240436) internal successors, (2027), 1960 states have internal predecessors, (2027), 70 states have call successors, (70), 5 states have call predecessors, (70), 133 states have return successors, (134), 68 states have call predecessors, (134), 68 states have call successors, (134) [2022-04-05 06:23:42,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2034 states to 2034 states and 2231 transitions. [2022-04-05 06:23:42,286 INFO L78 Accepts]: Start accepts. Automaton has 2034 states and 2231 transitions. Word has length 66 [2022-04-05 06:23:42,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:23:42,286 INFO L478 AbstractCegarLoop]: Abstraction has 2034 states and 2231 transitions. [2022-04-05 06:23:42,286 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 29 states have internal predecessors, (55), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-05 06:23:42,286 INFO L276 IsEmpty]: Start isEmpty. Operand 2034 states and 2231 transitions. [2022-04-05 06:23:42,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-04-05 06:23:42,308 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:23:42,308 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:23:42,323 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Ended with exit code 0 [2022-04-05 06:23:42,508 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2022-04-05 06:23:42,508 INFO L403 AbstractCegarLoop]: === Iteration 148 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:23:42,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:23:42,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1923549793, now seen corresponding path program 138 times [2022-04-05 06:23:42,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:23:42,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140775037] [2022-04-05 06:23:42,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:23:42,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:23:42,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:23:42,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:23:42,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:23:42,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:23:42,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:23:42,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-05 06:23:42,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:23:42,643 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-04-05 06:23:42,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:23:42,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140775037] [2022-04-05 06:23:42,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140775037] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:23:42,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843071185] [2022-04-05 06:23:42,643 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-05 06:23:42,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:23:42,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:23:42,644 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:23:42,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-04-05 06:23:42,772 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-04-05 06:23:42,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:23:42,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-05 06:23:42,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:23:42,977 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-04-05 06:23:42,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:23:43,058 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-04-05 06:23:43,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843071185] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:23:43,058 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:23:43,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 30 [2022-04-05 06:23:43,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062224677] [2022-04-05 06:23:43,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:23:43,058 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-04-05 06:23:43,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:23:43,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-04-05 06:23:43,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=651, Unknown=0, NotChecked=0, Total=870 [2022-04-05 06:23:43,059 INFO L87 Difference]: Start difference. First operand 2034 states and 2231 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:23:45,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:23:45,276 INFO L93 Difference]: Finished difference Result 3395 states and 3698 transitions. [2022-04-05 06:23:45,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-04-05 06:23:45,276 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 66 [2022-04-05 06:23:45,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:23:45,336 INFO L225 Difference]: With dead ends: 3395 [2022-04-05 06:23:45,336 INFO L226 Difference]: Without dead ends: 2260 [2022-04-05 06:23:45,363 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1578 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1673, Invalid=5299, Unknown=0, NotChecked=0, Total=6972 [2022-04-05 06:23:45,364 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 243 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 06:23:45,364 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 107 Invalid, 783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 06:23:45,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2260 states. [2022-04-05 06:23:46,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2260 to 2212. [2022-04-05 06:23:46,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2212 states, 2008 states have (on average 1.1065737051792828) internal successors, (2222), 2138 states have internal predecessors, (2222), 70 states have call successors, (70), 5 states have call predecessors, (70), 133 states have return successors, (134), 68 states have call predecessors, (134), 68 states have call successors, (134) [2022-04-05 06:23:46,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2212 states to 2212 states and 2426 transitions. [2022-04-05 06:23:46,732 INFO L78 Accepts]: Start accepts. Automaton has 2212 states and 2426 transitions. Word has length 66 [2022-04-05 06:23:46,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:23:46,732 INFO L478 AbstractCegarLoop]: Abstraction has 2212 states and 2426 transitions. [2022-04-05 06:23:46,732 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:23:46,732 INFO L276 IsEmpty]: Start isEmpty. Operand 2212 states and 2426 transitions. [2022-04-05 06:23:46,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-04-05 06:23:46,755 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:23:46,755 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:23:46,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Forceful destruction successful, exit code 0 [2022-04-05 06:23:46,955 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2022-04-05 06:23:46,956 INFO L403 AbstractCegarLoop]: === Iteration 149 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:23:46,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:23:46,956 INFO L85 PathProgramCache]: Analyzing trace with hash -414524724, now seen corresponding path program 139 times [2022-04-05 06:23:46,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:23:46,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876157551] [2022-04-05 06:23:46,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:23:46,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:23:46,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:23:47,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:23:47,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:23:47,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:23:47,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:23:47,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-05 06:23:47,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:23:47,796 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 274 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 06:23:47,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:23:47,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876157551] [2022-04-05 06:23:47,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876157551] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:23:47,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016491683] [2022-04-05 06:23:47,796 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-05 06:23:47,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:23:47,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:23:47,797 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:23:47,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-04-05 06:23:47,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:23:47,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 91 conjunts are in the unsatisfiable core [2022-04-05 06:23:47,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:23:48,303 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 274 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 06:23:48,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:23:48,574 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 274 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 06:23:48,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016491683] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:23:48,574 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:23:48,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 55 [2022-04-05 06:23:48,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442094149] [2022-04-05 06:23:48,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:23:48,574 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-04-05 06:23:48,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:23:48,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-04-05 06:23:48,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=2853, Unknown=0, NotChecked=0, Total=2970 [2022-04-05 06:23:48,575 INFO L87 Difference]: Start difference. First operand 2212 states and 2426 transitions. Second operand has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:23:54,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:23:54,360 INFO L93 Difference]: Finished difference Result 2412 states and 2647 transitions. [2022-04-05 06:23:54,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-04-05 06:23:54,361 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 67 [2022-04-05 06:23:54,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:23:54,379 INFO L225 Difference]: With dead ends: 2412 [2022-04-05 06:23:54,380 INFO L226 Difference]: Without dead ends: 2406 [2022-04-05 06:23:54,404 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 128 SyntacticMatches, 5 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1370 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=337, Invalid=9965, Unknown=0, NotChecked=0, Total=10302 [2022-04-05 06:23:54,404 INFO L913 BasicCegarLoop]: 178 mSDtfsCounter, 380 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 12690 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 12762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 12690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-04-05 06:23:54,404 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [390 Valid, 410 Invalid, 12762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 12690 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-04-05 06:23:54,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2406 states. [2022-04-05 06:23:55,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2406 to 2228. [2022-04-05 06:23:55,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2228 states, 2021 states have (on average 1.106877783275606) internal successors, (2237), 2153 states have internal predecessors, (2237), 71 states have call successors, (71), 5 states have call predecessors, (71), 135 states have return successors, (137), 69 states have call predecessors, (137), 69 states have call successors, (137) [2022-04-05 06:23:55,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2228 states to 2228 states and 2445 transitions. [2022-04-05 06:23:55,775 INFO L78 Accepts]: Start accepts. Automaton has 2228 states and 2445 transitions. Word has length 67 [2022-04-05 06:23:55,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:23:55,775 INFO L478 AbstractCegarLoop]: Abstraction has 2228 states and 2445 transitions. [2022-04-05 06:23:55,775 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:23:55,775 INFO L276 IsEmpty]: Start isEmpty. Operand 2228 states and 2445 transitions. [2022-04-05 06:23:55,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-04-05 06:23:55,797 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:23:55,797 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:23:55,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Forceful destruction successful, exit code 0 [2022-04-05 06:23:55,997 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2022-04-05 06:23:55,997 INFO L403 AbstractCegarLoop]: === Iteration 150 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:23:55,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:23:55,998 INFO L85 PathProgramCache]: Analyzing trace with hash -452075401, now seen corresponding path program 140 times [2022-04-05 06:23:55,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:23:55,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409502916] [2022-04-05 06:23:55,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:23:55,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:23:56,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:23:56,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:23:56,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:23:56,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:23:56,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:23:56,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-05 06:23:56,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:23:56,814 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 216 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-05 06:23:56,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:23:56,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409502916] [2022-04-05 06:23:56,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409502916] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:23:56,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925515022] [2022-04-05 06:23:56,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 06:23:56,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:23:56,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:23:56,815 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:23:56,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-04-05 06:23:56,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 06:23:56,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:23:56,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 87 conjunts are in the unsatisfiable core [2022-04-05 06:23:56,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:23:57,498 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 216 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-05 06:23:57,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:23:57,834 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 216 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-05 06:23:57,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925515022] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:23:57,834 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:23:57,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 55 [2022-04-05 06:23:57,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293245081] [2022-04-05 06:23:57,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:23:57,835 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-04-05 06:23:57,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:23:57,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-04-05 06:23:57,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=2849, Unknown=0, NotChecked=0, Total=2970 [2022-04-05 06:23:57,835 INFO L87 Difference]: Start difference. First operand 2228 states and 2445 transitions. Second operand has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:24:03,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:24:03,233 INFO L93 Difference]: Finished difference Result 2234 states and 2450 transitions. [2022-04-05 06:24:03,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-04-05 06:24:03,234 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 67 [2022-04-05 06:24:03,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:24:03,247 INFO L225 Difference]: With dead ends: 2234 [2022-04-05 06:24:03,247 INFO L226 Difference]: Without dead ends: 2212 [2022-04-05 06:24:03,272 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 122 SyntacticMatches, 9 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1389 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=339, Invalid=9561, Unknown=0, NotChecked=0, Total=9900 [2022-04-05 06:24:03,272 INFO L913 BasicCegarLoop]: 158 mSDtfsCounter, 294 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 11825 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 11877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 11825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-04-05 06:24:03,272 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 400 Invalid, 11877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 11825 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-04-05 06:24:03,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2212 states. [2022-04-05 06:24:04,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2212 to 2212. [2022-04-05 06:24:04,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2212 states, 2008 states have (on average 1.1065737051792828) internal successors, (2222), 2138 states have internal predecessors, (2222), 70 states have call successors, (70), 5 states have call predecessors, (70), 133 states have return successors, (135), 68 states have call predecessors, (135), 68 states have call successors, (135) [2022-04-05 06:24:04,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2212 states to 2212 states and 2427 transitions. [2022-04-05 06:24:04,638 INFO L78 Accepts]: Start accepts. Automaton has 2212 states and 2427 transitions. Word has length 67 [2022-04-05 06:24:04,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:24:04,638 INFO L478 AbstractCegarLoop]: Abstraction has 2212 states and 2427 transitions. [2022-04-05 06:24:04,638 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:24:04,638 INFO L276 IsEmpty]: Start isEmpty. Operand 2212 states and 2427 transitions. [2022-04-05 06:24:04,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-04-05 06:24:04,661 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:24:04,661 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:24:04,677 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Ended with exit code 0 [2022-04-05 06:24:04,861 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:24:04,861 INFO L403 AbstractCegarLoop]: === Iteration 151 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:24:04,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:24:04,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1840210900, now seen corresponding path program 141 times [2022-04-05 06:24:04,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:24:04,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95443264] [2022-04-05 06:24:04,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:24:04,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:24:04,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:24:04,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:24:04,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:24:04,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:24:04,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:24:05,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-05 06:24:05,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:24:05,584 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 06:24:05,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:24:05,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95443264] [2022-04-05 06:24:05,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95443264] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:24:05,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012199494] [2022-04-05 06:24:05,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 06:24:05,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:24:05,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:24:05,585 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:24:05,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-04-05 06:24:05,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-04-05 06:24:05,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:24:05,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 83 conjunts are in the unsatisfiable core [2022-04-05 06:24:05,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:24:06,295 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 06:24:06,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:24:06,594 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 06:24:06,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012199494] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:24:06,594 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:24:06,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 55 [2022-04-05 06:24:06,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119737448] [2022-04-05 06:24:06,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:24:06,594 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-04-05 06:24:06,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:24:06,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-04-05 06:24:06,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=2845, Unknown=0, NotChecked=0, Total=2970 [2022-04-05 06:24:06,595 INFO L87 Difference]: Start difference. First operand 2212 states and 2427 transitions. Second operand has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:24:11,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:24:11,363 INFO L93 Difference]: Finished difference Result 2218 states and 2432 transitions. [2022-04-05 06:24:11,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-04-05 06:24:11,364 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 67 [2022-04-05 06:24:11,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:24:11,375 INFO L225 Difference]: With dead ends: 2218 [2022-04-05 06:24:11,375 INFO L226 Difference]: Without dead ends: 2194 [2022-04-05 06:24:11,398 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 120 SyntacticMatches, 9 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1394 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=341, Invalid=9165, Unknown=0, NotChecked=0, Total=9506 [2022-04-05 06:24:11,398 INFO L913 BasicCegarLoop]: 138 mSDtfsCounter, 258 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 9542 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 9594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 9542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-04-05 06:24:11,398 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 360 Invalid, 9594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 9542 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-04-05 06:24:11,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2194 states. [2022-04-05 06:24:12,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2194 to 2194. [2022-04-05 06:24:12,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2194 states, 1993 states have (on average 1.1063723030607124) internal successors, (2205), 2121 states have internal predecessors, (2205), 69 states have call successors, (69), 5 states have call predecessors, (69), 131 states have return successors, (133), 67 states have call predecessors, (133), 67 states have call successors, (133) [2022-04-05 06:24:12,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2194 states to 2194 states and 2407 transitions. [2022-04-05 06:24:12,691 INFO L78 Accepts]: Start accepts. Automaton has 2194 states and 2407 transitions. Word has length 67 [2022-04-05 06:24:12,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:24:12,691 INFO L478 AbstractCegarLoop]: Abstraction has 2194 states and 2407 transitions. [2022-04-05 06:24:12,691 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:24:12,691 INFO L276 IsEmpty]: Start isEmpty. Operand 2194 states and 2407 transitions. [2022-04-05 06:24:12,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-04-05 06:24:12,712 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:24:12,712 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:24:12,728 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Ended with exit code 0 [2022-04-05 06:24:12,913 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:24:12,913 INFO L403 AbstractCegarLoop]: === Iteration 152 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:24:12,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:24:12,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1810811671, now seen corresponding path program 142 times [2022-04-05 06:24:12,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:24:12,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908045450] [2022-04-05 06:24:12,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:24:12,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:24:12,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:24:12,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:24:12,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:24:12,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:24:12,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:24:13,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-05 06:24:13,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:24:13,663 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-05 06:24:13,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:24:13,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908045450] [2022-04-05 06:24:13,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908045450] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:24:13,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996047808] [2022-04-05 06:24:13,664 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 06:24:13,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:24:13,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:24:13,665 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:24:13,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-04-05 06:24:13,792 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 06:24:13,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:24:13,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 79 conjunts are in the unsatisfiable core [2022-04-05 06:24:13,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:24:14,412 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-05 06:24:14,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:24:14,703 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-05 06:24:14,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996047808] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:24:14,704 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:24:14,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 55 [2022-04-05 06:24:14,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086700270] [2022-04-05 06:24:14,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:24:14,704 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-04-05 06:24:14,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:24:14,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-04-05 06:24:14,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=2841, Unknown=0, NotChecked=0, Total=2970 [2022-04-05 06:24:14,705 INFO L87 Difference]: Start difference. First operand 2194 states and 2407 transitions. Second operand has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:24:18,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:24:18,944 INFO L93 Difference]: Finished difference Result 2200 states and 2412 transitions. [2022-04-05 06:24:18,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-04-05 06:24:18,945 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 67 [2022-04-05 06:24:18,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:24:18,956 INFO L225 Difference]: With dead ends: 2200 [2022-04-05 06:24:18,956 INFO L226 Difference]: Without dead ends: 2174 [2022-04-05 06:24:18,984 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 118 SyntacticMatches, 9 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1399 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=343, Invalid=8777, Unknown=0, NotChecked=0, Total=9120 [2022-04-05 06:24:18,985 INFO L913 BasicCegarLoop]: 118 mSDtfsCounter, 222 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 8060 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 8110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 8060 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-04-05 06:24:18,985 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 335 Invalid, 8110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 8060 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-04-05 06:24:18,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2174 states. [2022-04-05 06:24:20,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2174 to 2174. [2022-04-05 06:24:20,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2174 states, 1976 states have (on average 1.1062753036437247) internal successors, (2186), 2102 states have internal predecessors, (2186), 68 states have call successors, (68), 5 states have call predecessors, (68), 129 states have return successors, (131), 66 states have call predecessors, (131), 66 states have call successors, (131) [2022-04-05 06:24:20,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2174 states to 2174 states and 2385 transitions. [2022-04-05 06:24:20,330 INFO L78 Accepts]: Start accepts. Automaton has 2174 states and 2385 transitions. Word has length 67 [2022-04-05 06:24:20,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:24:20,330 INFO L478 AbstractCegarLoop]: Abstraction has 2174 states and 2385 transitions. [2022-04-05 06:24:20,330 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:24:20,331 INFO L276 IsEmpty]: Start isEmpty. Operand 2174 states and 2385 transitions. [2022-04-05 06:24:20,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-04-05 06:24:20,352 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:24:20,352 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:24:20,368 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Ended with exit code 0 [2022-04-05 06:24:20,553 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:24:20,553 INFO L403 AbstractCegarLoop]: === Iteration 153 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:24:20,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:24:20,553 INFO L85 PathProgramCache]: Analyzing trace with hash -158431860, now seen corresponding path program 143 times [2022-04-05 06:24:20,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:24:20,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865596198] [2022-04-05 06:24:20,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:24:20,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:24:20,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:24:20,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:24:20,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:24:20,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:24:20,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:24:20,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-05 06:24:20,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:24:21,203 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-05 06:24:21,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:24:21,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865596198] [2022-04-05 06:24:21,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865596198] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:24:21,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908005206] [2022-04-05 06:24:21,203 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 06:24:21,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:24:21,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:24:21,204 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:24:21,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-04-05 06:24:21,335 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-04-05 06:24:21,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:24:21,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 75 conjunts are in the unsatisfiable core [2022-04-05 06:24:21,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:24:22,000 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-05 06:24:22,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:24:22,284 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-05 06:24:22,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908005206] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:24:22,284 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:24:22,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 55 [2022-04-05 06:24:22,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422495482] [2022-04-05 06:24:22,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:24:22,284 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-04-05 06:24:22,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:24:22,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-04-05 06:24:22,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=2837, Unknown=0, NotChecked=0, Total=2970 [2022-04-05 06:24:22,285 INFO L87 Difference]: Start difference. First operand 2174 states and 2385 transitions. Second operand has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:24:26,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:24:26,085 INFO L93 Difference]: Finished difference Result 2180 states and 2390 transitions. [2022-04-05 06:24:26,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-04-05 06:24:26,086 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 67 [2022-04-05 06:24:26,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:24:26,096 INFO L225 Difference]: With dead ends: 2180 [2022-04-05 06:24:26,096 INFO L226 Difference]: Without dead ends: 2152 [2022-04-05 06:24:26,117 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 116 SyntacticMatches, 9 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1404 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=345, Invalid=8397, Unknown=0, NotChecked=0, Total=8742 [2022-04-05 06:24:26,117 INFO L913 BasicCegarLoop]: 98 mSDtfsCounter, 187 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 6458 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 6506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 6458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-04-05 06:24:26,117 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 305 Invalid, 6506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 6458 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-04-05 06:24:26,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2022-04-05 06:24:27,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 2152. [2022-04-05 06:24:27,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2152 states, 1957 states have (on average 1.1062851303014818) internal successors, (2165), 2081 states have internal predecessors, (2165), 67 states have call successors, (67), 5 states have call predecessors, (67), 127 states have return successors, (129), 65 states have call predecessors, (129), 65 states have call successors, (129) [2022-04-05 06:24:27,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2152 states to 2152 states and 2361 transitions. [2022-04-05 06:24:27,382 INFO L78 Accepts]: Start accepts. Automaton has 2152 states and 2361 transitions. Word has length 67 [2022-04-05 06:24:27,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:24:27,382 INFO L478 AbstractCegarLoop]: Abstraction has 2152 states and 2361 transitions. [2022-04-05 06:24:27,382 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:24:27,382 INFO L276 IsEmpty]: Start isEmpty. Operand 2152 states and 2361 transitions. [2022-04-05 06:24:27,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-04-05 06:24:27,403 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:24:27,403 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:24:27,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Forceful destruction successful, exit code 0 [2022-04-05 06:24:27,607 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:24:27,607 INFO L403 AbstractCegarLoop]: === Iteration 154 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:24:27,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:24:27,608 INFO L85 PathProgramCache]: Analyzing trace with hash -633565769, now seen corresponding path program 144 times [2022-04-05 06:24:27,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:24:27,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379340296] [2022-04-05 06:24:27,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:24:27,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:24:27,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:24:27,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:24:27,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:24:27,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:24:27,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:24:27,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-05 06:24:27,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:24:28,210 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-05 06:24:28,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:24:28,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379340296] [2022-04-05 06:24:28,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379340296] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:24:28,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932791579] [2022-04-05 06:24:28,211 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-05 06:24:28,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:24:28,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:24:28,212 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:24:28,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2022-04-05 06:24:28,341 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-05 06:24:28,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:24:28,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 71 conjunts are in the unsatisfiable core [2022-04-05 06:24:28,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:24:29,070 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-05 06:24:29,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:24:29,346 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-05 06:24:29,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932791579] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:24:29,347 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:24:29,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 55 [2022-04-05 06:24:29,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397951760] [2022-04-05 06:24:29,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:24:29,347 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-04-05 06:24:29,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:24:29,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-04-05 06:24:29,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=2833, Unknown=0, NotChecked=0, Total=2970 [2022-04-05 06:24:29,348 INFO L87 Difference]: Start difference. First operand 2152 states and 2361 transitions. Second operand has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:24:32,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:24:32,799 INFO L93 Difference]: Finished difference Result 2158 states and 2366 transitions. [2022-04-05 06:24:32,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-05 06:24:32,800 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 67 [2022-04-05 06:24:32,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:24:32,810 INFO L225 Difference]: With dead ends: 2158 [2022-04-05 06:24:32,810 INFO L226 Difference]: Without dead ends: 2128 [2022-04-05 06:24:32,831 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 114 SyntacticMatches, 9 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1409 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=347, Invalid=8025, Unknown=0, NotChecked=0, Total=8372 [2022-04-05 06:24:32,831 INFO L913 BasicCegarLoop]: 78 mSDtfsCounter, 151 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 5350 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 5396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 5350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-04-05 06:24:32,831 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 290 Invalid, 5396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 5350 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-04-05 06:24:32,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2128 states. [2022-04-05 06:24:34,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2128 to 2128. [2022-04-05 06:24:34,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2128 states, 1936 states have (on average 1.1064049586776858) internal successors, (2142), 2058 states have internal predecessors, (2142), 66 states have call successors, (66), 5 states have call predecessors, (66), 125 states have return successors, (127), 64 states have call predecessors, (127), 64 states have call successors, (127) [2022-04-05 06:24:34,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2128 states to 2128 states and 2335 transitions. [2022-04-05 06:24:34,134 INFO L78 Accepts]: Start accepts. Automaton has 2128 states and 2335 transitions. Word has length 67 [2022-04-05 06:24:34,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:24:34,135 INFO L478 AbstractCegarLoop]: Abstraction has 2128 states and 2335 transitions. [2022-04-05 06:24:34,135 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:24:34,135 INFO L276 IsEmpty]: Start isEmpty. Operand 2128 states and 2335 transitions. [2022-04-05 06:24:34,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-04-05 06:24:34,154 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:24:34,154 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:24:34,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Forceful destruction successful, exit code 0 [2022-04-05 06:24:34,354 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:24:34,354 INFO L403 AbstractCegarLoop]: === Iteration 155 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:24:34,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:24:34,355 INFO L85 PathProgramCache]: Analyzing trace with hash 861574892, now seen corresponding path program 145 times [2022-04-05 06:24:34,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:24:34,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059180536] [2022-04-05 06:24:34,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:24:34,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:24:34,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:24:34,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:24:34,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:24:34,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:24:34,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:24:34,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-05 06:24:34,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:24:34,895 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-05 06:24:34,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:24:34,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059180536] [2022-04-05 06:24:34,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059180536] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:24:34,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839033514] [2022-04-05 06:24:34,896 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-05 06:24:34,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:24:34,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:24:34,897 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:24:34,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2022-04-05 06:24:35,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:24:35,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 67 conjunts are in the unsatisfiable core [2022-04-05 06:24:35,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:24:35,793 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-05 06:24:35,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:24:36,079 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-05 06:24:36,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839033514] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:24:36,079 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:24:36,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 55 [2022-04-05 06:24:36,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053210856] [2022-04-05 06:24:36,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:24:36,080 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-04-05 06:24:36,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:24:36,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-04-05 06:24:36,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=2829, Unknown=0, NotChecked=0, Total=2970 [2022-04-05 06:24:36,081 INFO L87 Difference]: Start difference. First operand 2128 states and 2335 transitions. Second operand has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:24:39,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:24:39,033 INFO L93 Difference]: Finished difference Result 2134 states and 2340 transitions. [2022-04-05 06:24:39,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-05 06:24:39,033 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 67 [2022-04-05 06:24:39,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:24:39,046 INFO L225 Difference]: With dead ends: 2134 [2022-04-05 06:24:39,046 INFO L226 Difference]: Without dead ends: 2102 [2022-04-05 06:24:39,067 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 112 SyntacticMatches, 9 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1414 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=349, Invalid=7661, Unknown=0, NotChecked=0, Total=8010 [2022-04-05 06:24:39,068 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 115 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 3913 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 3957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 3913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-05 06:24:39,068 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 255 Invalid, 3957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 3913 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-05 06:24:39,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2102 states. [2022-04-05 06:24:40,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2102 to 2102. [2022-04-05 06:24:40,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2102 states, 1913 states have (on average 1.1066387872451646) internal successors, (2117), 2033 states have internal predecessors, (2117), 65 states have call successors, (65), 5 states have call predecessors, (65), 123 states have return successors, (125), 63 states have call predecessors, (125), 63 states have call successors, (125) [2022-04-05 06:24:40,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2102 states to 2102 states and 2307 transitions. [2022-04-05 06:24:40,361 INFO L78 Accepts]: Start accepts. Automaton has 2102 states and 2307 transitions. Word has length 67 [2022-04-05 06:24:40,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:24:40,361 INFO L478 AbstractCegarLoop]: Abstraction has 2102 states and 2307 transitions. [2022-04-05 06:24:40,361 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:24:40,361 INFO L276 IsEmpty]: Start isEmpty. Operand 2102 states and 2307 transitions. [2022-04-05 06:24:40,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-04-05 06:24:40,382 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:24:40,382 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:24:40,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Forceful destruction successful, exit code 0 [2022-04-05 06:24:40,582 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:24:40,582 INFO L403 AbstractCegarLoop]: === Iteration 156 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:24:40,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:24:40,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1493055343, now seen corresponding path program 146 times [2022-04-05 06:24:40,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:24:40,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526587500] [2022-04-05 06:24:40,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:24:40,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:24:40,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:24:40,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:24:40,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:24:40,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:24:40,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:24:40,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-05 06:24:40,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:24:40,947 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-04-05 06:24:40,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:24:40,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526587500] [2022-04-05 06:24:40,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526587500] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:24:40,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80948825] [2022-04-05 06:24:40,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 06:24:40,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:24:40,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:24:40,949 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:24:40,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2022-04-05 06:24:41,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 06:24:41,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:24:41,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-05 06:24:41,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:24:41,658 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-04-05 06:24:41,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:24:42,469 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-04-05 06:24:42,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80948825] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:24:42,470 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:24:42,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 23, 23] total 63 [2022-04-05 06:24:42,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144974477] [2022-04-05 06:24:42,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:24:42,470 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-04-05 06:24:42,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:24:42,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-04-05 06:24:42,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=3680, Unknown=0, NotChecked=0, Total=3906 [2022-04-05 06:24:42,471 INFO L87 Difference]: Start difference. First operand 2102 states and 2307 transitions. Second operand has 63 states, 63 states have (on average 1.3968253968253967) internal successors, (88), 62 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:24:47,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:24:47,142 INFO L93 Difference]: Finished difference Result 2238 states and 2473 transitions. [2022-04-05 06:24:47,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-04-05 06:24:47,143 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.3968253968253967) internal successors, (88), 62 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2022-04-05 06:24:47,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:24:47,223 INFO L225 Difference]: With dead ends: 2238 [2022-04-05 06:24:47,223 INFO L226 Difference]: Without dead ends: 2217 [2022-04-05 06:24:47,248 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 97 SyntacticMatches, 5 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1374 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=677, Invalid=9025, Unknown=0, NotChecked=0, Total=9702 [2022-04-05 06:24:47,249 INFO L913 BasicCegarLoop]: 119 mSDtfsCounter, 1316 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 5915 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1320 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 6042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 5915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-04-05 06:24:47,249 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1320 Valid, 286 Invalid, 6042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 5915 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-04-05 06:24:47,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2217 states. [2022-04-05 06:24:48,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2217 to 2212. [2022-04-05 06:24:48,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2212 states, 1978 states have (on average 1.10262891809909) internal successors, (2181), 2128 states have internal predecessors, (2181), 80 states have call successors, (80), 5 states have call predecessors, (80), 153 states have return successors, (170), 78 states have call predecessors, (170), 78 states have call successors, (170) [2022-04-05 06:24:48,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2212 states to 2212 states and 2431 transitions. [2022-04-05 06:24:48,521 INFO L78 Accepts]: Start accepts. Automaton has 2212 states and 2431 transitions. Word has length 67 [2022-04-05 06:24:48,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:24:48,522 INFO L478 AbstractCegarLoop]: Abstraction has 2212 states and 2431 transitions. [2022-04-05 06:24:48,522 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.3968253968253967) internal successors, (88), 62 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:24:48,522 INFO L276 IsEmpty]: Start isEmpty. Operand 2212 states and 2431 transitions. [2022-04-05 06:24:48,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-04-05 06:24:48,544 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:24:48,544 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:24:48,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Forceful destruction successful, exit code 0 [2022-04-05 06:24:48,745 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2022-04-05 06:24:48,745 INFO L403 AbstractCegarLoop]: === Iteration 157 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:24:48,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:24:48,745 INFO L85 PathProgramCache]: Analyzing trace with hash -480171945, now seen corresponding path program 147 times [2022-04-05 06:24:48,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:24:48,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76505131] [2022-04-05 06:24:48,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:24:48,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:24:48,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:24:48,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:24:48,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:24:48,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:24:48,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:24:48,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-05 06:24:48,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:24:49,243 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-04-05 06:24:49,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:24:49,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76505131] [2022-04-05 06:24:49,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76505131] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:24:49,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842832277] [2022-04-05 06:24:49,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 06:24:49,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:24:49,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:24:49,245 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:24:49,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2022-04-05 06:24:49,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-04-05 06:24:49,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:24:49,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 63 conjunts are in the unsatisfiable core [2022-04-05 06:24:49,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:24:50,176 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-04-05 06:24:50,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:24:50,435 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-04-05 06:24:50,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842832277] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:24:50,435 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:24:50,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 55 [2022-04-05 06:24:50,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568204992] [2022-04-05 06:24:50,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:24:50,436 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-04-05 06:24:50,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:24:50,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-04-05 06:24:50,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=2825, Unknown=0, NotChecked=0, Total=2970 [2022-04-05 06:24:50,437 INFO L87 Difference]: Start difference. First operand 2212 states and 2431 transitions. Second operand has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:24:53,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:24:53,211 INFO L93 Difference]: Finished difference Result 2230 states and 2453 transitions. [2022-04-05 06:24:53,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-05 06:24:53,211 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 67 [2022-04-05 06:24:53,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:24:53,231 INFO L225 Difference]: With dead ends: 2230 [2022-04-05 06:24:53,231 INFO L226 Difference]: Without dead ends: 2209 [2022-04-05 06:24:53,258 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 110 SyntacticMatches, 9 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1419 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=351, Invalid=7305, Unknown=0, NotChecked=0, Total=7656 [2022-04-05 06:24:53,259 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 77 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 2998 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 3040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 2998 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-05 06:24:53,259 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 248 Invalid, 3040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 2998 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-05 06:24:53,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2209 states. [2022-04-05 06:24:54,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2209 to 2204. [2022-04-05 06:24:54,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2204 states, 1970 states have (on average 1.1035532994923858) internal successors, (2174), 2120 states have internal predecessors, (2174), 80 states have call successors, (80), 5 states have call predecessors, (80), 153 states have return successors, (170), 78 states have call predecessors, (170), 78 states have call successors, (170) [2022-04-05 06:24:54,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2204 states to 2204 states and 2424 transitions. [2022-04-05 06:24:54,593 INFO L78 Accepts]: Start accepts. Automaton has 2204 states and 2424 transitions. Word has length 67 [2022-04-05 06:24:54,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:24:54,593 INFO L478 AbstractCegarLoop]: Abstraction has 2204 states and 2424 transitions. [2022-04-05 06:24:54,593 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:24:54,593 INFO L276 IsEmpty]: Start isEmpty. Operand 2204 states and 2424 transitions. [2022-04-05 06:24:54,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-04-05 06:24:54,617 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:24:54,617 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:24:54,633 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Ended with exit code 0 [2022-04-05 06:24:54,817 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2022-04-05 06:24:54,817 INFO L403 AbstractCegarLoop]: === Iteration 158 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:24:54,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:24:54,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1457390534, now seen corresponding path program 148 times [2022-04-05 06:24:54,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:24:54,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338438286] [2022-04-05 06:24:54,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:24:54,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:24:54,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:24:54,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:24:54,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:24:54,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:24:54,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:24:54,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-05 06:24:54,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:24:55,181 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-04-05 06:24:55,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:24:55,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338438286] [2022-04-05 06:24:55,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338438286] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:24:55,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728699729] [2022-04-05 06:24:55,181 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 06:24:55,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:24:55,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:24:55,182 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:24:55,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2022-04-05 06:24:55,313 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 06:24:55,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:24:55,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-05 06:24:55,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:24:55,920 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-04-05 06:24:55,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:24:56,725 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-04-05 06:24:56,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728699729] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:24:56,725 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:24:56,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 23, 23] total 63 [2022-04-05 06:24:56,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357204042] [2022-04-05 06:24:56,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:24:56,726 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-04-05 06:24:56,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:24:56,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-04-05 06:24:56,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=3680, Unknown=0, NotChecked=0, Total=3906 [2022-04-05 06:24:56,727 INFO L87 Difference]: Start difference. First operand 2204 states and 2424 transitions. Second operand has 63 states, 63 states have (on average 1.3968253968253967) internal successors, (88), 62 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:25:01,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:25:01,366 INFO L93 Difference]: Finished difference Result 2218 states and 2437 transitions. [2022-04-05 06:25:01,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-04-05 06:25:01,366 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.3968253968253967) internal successors, (88), 62 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2022-04-05 06:25:01,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:25:01,378 INFO L225 Difference]: With dead ends: 2218 [2022-04-05 06:25:01,378 INFO L226 Difference]: Without dead ends: 2186 [2022-04-05 06:25:01,406 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 96 SyntacticMatches, 6 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1386 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=677, Invalid=9025, Unknown=0, NotChecked=0, Total=9702 [2022-04-05 06:25:01,406 INFO L913 BasicCegarLoop]: 117 mSDtfsCounter, 1311 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 5473 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1328 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 5581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 5473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-04-05 06:25:01,406 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1328 Valid, 274 Invalid, 5581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 5473 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-04-05 06:25:01,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2186 states. [2022-04-05 06:25:02,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2186 to 2184. [2022-04-05 06:25:02,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2184 states, 1950 states have (on average 1.1035897435897435) internal successors, (2152), 2100 states have internal predecessors, (2152), 80 states have call successors, (80), 5 states have call predecessors, (80), 153 states have return successors, (156), 78 states have call predecessors, (156), 78 states have call successors, (156) [2022-04-05 06:25:02,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2184 states to 2184 states and 2388 transitions. [2022-04-05 06:25:02,673 INFO L78 Accepts]: Start accepts. Automaton has 2184 states and 2388 transitions. Word has length 67 [2022-04-05 06:25:02,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:25:02,674 INFO L478 AbstractCegarLoop]: Abstraction has 2184 states and 2388 transitions. [2022-04-05 06:25:02,674 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.3968253968253967) internal successors, (88), 62 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:25:02,674 INFO L276 IsEmpty]: Start isEmpty. Operand 2184 states and 2388 transitions. [2022-04-05 06:25:02,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-05 06:25:02,696 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:25:02,696 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:25:02,713 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Ended with exit code 0 [2022-04-05 06:25:02,897 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2022-04-05 06:25:02,897 INFO L403 AbstractCegarLoop]: === Iteration 159 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:25:02,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:25:02,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1904009907, now seen corresponding path program 149 times [2022-04-05 06:25:02,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:25:02,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490843820] [2022-04-05 06:25:02,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:25:02,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:25:02,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:25:02,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:25:02,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:25:02,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:25:02,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:25:03,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-05 06:25:03,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:25:03,661 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:25:03,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:25:03,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490843820] [2022-04-05 06:25:03,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490843820] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:25:03,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897933434] [2022-04-05 06:25:03,662 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 06:25:03,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:25:03,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:25:03,662 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:25:03,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2022-04-05 06:25:03,796 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-04-05 06:25:03,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:25:03,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 44 conjunts are in the unsatisfiable core [2022-04-05 06:25:03,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:25:05,292 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:25:05,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:25:07,519 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 17 proven. 272 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:25:07,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897933434] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:25:07,519 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:25:07,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 39, 39] total 109 [2022-04-05 06:25:07,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216390537] [2022-04-05 06:25:07,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:25:07,520 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-04-05 06:25:07,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:25:07,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-04-05 06:25:07,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=11403, Unknown=0, NotChecked=0, Total=11772 [2022-04-05 06:25:07,521 INFO L87 Difference]: Start difference. First operand 2184 states and 2388 transitions. Second operand has 109 states, 109 states have (on average 1.3027522935779816) internal successors, (142), 108 states have internal predecessors, (142), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:25:19,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:25:19,754 INFO L93 Difference]: Finished difference Result 2390 states and 2627 transitions. [2022-04-05 06:25:19,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-04-05 06:25:19,755 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 1.3027522935779816) internal successors, (142), 108 states have internal predecessors, (142), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 68 [2022-04-05 06:25:19,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:25:19,798 INFO L225 Difference]: With dead ends: 2390 [2022-04-05 06:25:19,798 INFO L226 Difference]: Without dead ends: 2376 [2022-04-05 06:25:19,827 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4643 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=1608, Invalid=29544, Unknown=0, NotChecked=0, Total=31152 [2022-04-05 06:25:19,828 INFO L913 BasicCegarLoop]: 184 mSDtfsCounter, 3404 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 15871 mSolverCounterSat, 361 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3409 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 16232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 361 IncrementalHoareTripleChecker+Valid, 15871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-04-05 06:25:19,828 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3409 Valid, 486 Invalid, 16232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [361 Valid, 15871 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-04-05 06:25:19,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2376 states. [2022-04-05 06:25:21,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2376 to 2367. [2022-04-05 06:25:21,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2367 states, 2112 states have (on average 1.103219696969697) internal successors, (2330), 2276 states have internal predecessors, (2330), 87 states have call successors, (87), 5 states have call predecessors, (87), 167 states have return successors, (177), 85 states have call predecessors, (177), 85 states have call successors, (177) [2022-04-05 06:25:21,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2367 states to 2367 states and 2594 transitions. [2022-04-05 06:25:21,331 INFO L78 Accepts]: Start accepts. Automaton has 2367 states and 2594 transitions. Word has length 68 [2022-04-05 06:25:21,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:25:21,332 INFO L478 AbstractCegarLoop]: Abstraction has 2367 states and 2594 transitions. [2022-04-05 06:25:21,332 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 1.3027522935779816) internal successors, (142), 108 states have internal predecessors, (142), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:25:21,332 INFO L276 IsEmpty]: Start isEmpty. Operand 2367 states and 2594 transitions. [2022-04-05 06:25:21,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-05 06:25:21,358 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:25:21,358 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:25:21,375 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Ended with exit code 0 [2022-04-05 06:25:21,558 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2022-04-05 06:25:21,558 INFO L403 AbstractCegarLoop]: === Iteration 160 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:25:21,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:25:21,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1165319677, now seen corresponding path program 150 times [2022-04-05 06:25:21,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:25:21,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43212186] [2022-04-05 06:25:21,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:25:21,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:25:21,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:25:21,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:25:21,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:25:21,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:25:21,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:25:21,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-05 06:25:21,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:25:22,317 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:25:22,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:25:22,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43212186] [2022-04-05 06:25:22,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43212186] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:25:22,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293862283] [2022-04-05 06:25:22,318 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-05 06:25:22,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:25:22,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:25:22,319 INFO L229 MonitoredProcess]: Starting monitored process 151 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:25:22,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2022-04-05 06:25:22,466 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-04-05 06:25:22,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:25:22,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 44 conjunts are in the unsatisfiable core [2022-04-05 06:25:22,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:25:23,974 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:25:23,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:25:26,143 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 17 proven. 272 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:25:26,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293862283] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:25:26,143 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:25:26,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 39, 39] total 109 [2022-04-05 06:25:26,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871136561] [2022-04-05 06:25:26,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:25:26,144 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-04-05 06:25:26,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:25:26,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-04-05 06:25:26,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=11403, Unknown=0, NotChecked=0, Total=11772 [2022-04-05 06:25:26,146 INFO L87 Difference]: Start difference. First operand 2367 states and 2594 transitions. Second operand has 109 states, 109 states have (on average 1.3027522935779816) internal successors, (142), 108 states have internal predecessors, (142), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:25:38,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:25:38,628 INFO L93 Difference]: Finished difference Result 2382 states and 2609 transitions. [2022-04-05 06:25:38,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-04-05 06:25:38,628 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 1.3027522935779816) internal successors, (142), 108 states have internal predecessors, (142), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 68 [2022-04-05 06:25:38,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:25:38,642 INFO L225 Difference]: With dead ends: 2382 [2022-04-05 06:25:38,642 INFO L226 Difference]: Without dead ends: 2370 [2022-04-05 06:25:38,672 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4663 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=1608, Invalid=29544, Unknown=0, NotChecked=0, Total=31152 [2022-04-05 06:25:38,673 INFO L913 BasicCegarLoop]: 186 mSDtfsCounter, 3464 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 16065 mSolverCounterSat, 330 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3497 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 16395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 330 IncrementalHoareTripleChecker+Valid, 16065 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-04-05 06:25:38,673 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3497 Valid, 483 Invalid, 16395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [330 Valid, 16065 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-04-05 06:25:38,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2370 states. [2022-04-05 06:25:40,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2370 to 2368. [2022-04-05 06:25:40,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2368 states, 2113 states have (on average 1.1031708471367723) internal successors, (2331), 2277 states have internal predecessors, (2331), 87 states have call successors, (87), 5 states have call predecessors, (87), 167 states have return successors, (169), 85 states have call predecessors, (169), 85 states have call successors, (169) [2022-04-05 06:25:40,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2368 states to 2368 states and 2587 transitions. [2022-04-05 06:25:40,194 INFO L78 Accepts]: Start accepts. Automaton has 2368 states and 2587 transitions. Word has length 68 [2022-04-05 06:25:40,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:25:40,194 INFO L478 AbstractCegarLoop]: Abstraction has 2368 states and 2587 transitions. [2022-04-05 06:25:40,194 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 1.3027522935779816) internal successors, (142), 108 states have internal predecessors, (142), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:25:40,194 INFO L276 IsEmpty]: Start isEmpty. Operand 2368 states and 2587 transitions. [2022-04-05 06:25:40,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-05 06:25:40,219 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:25:40,219 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:25:40,236 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Ended with exit code 0 [2022-04-05 06:25:40,419 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:25:40,419 INFO L403 AbstractCegarLoop]: === Iteration 161 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:25:40,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:25:40,420 INFO L85 PathProgramCache]: Analyzing trace with hash -236879690, now seen corresponding path program 151 times [2022-04-05 06:25:40,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:25:40,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917306631] [2022-04-05 06:25:40,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:25:40,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:25:40,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:25:40,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:25:40,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:25:40,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:25:40,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:25:40,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-05 06:25:40,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:25:40,561 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-04-05 06:25:40,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:25:40,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917306631] [2022-04-05 06:25:40,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917306631] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:25:40,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649961393] [2022-04-05 06:25:40,562 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-05 06:25:40,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:25:40,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:25:40,563 INFO L229 MonitoredProcess]: Starting monitored process 152 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:25:40,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2022-04-05 06:25:40,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:25:40,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-05 06:25:40,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:25:40,884 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-04-05 06:25:40,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:25:40,968 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-04-05 06:25:40,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649961393] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:25:40,969 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:25:40,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 31 [2022-04-05 06:25:40,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454028071] [2022-04-05 06:25:40,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:25:40,969 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-05 06:25:40,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:25:40,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-05 06:25:40,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2022-04-05 06:25:40,970 INFO L87 Difference]: Start difference. First operand 2368 states and 2587 transitions. Second operand has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:25:43,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:25:43,256 INFO L93 Difference]: Finished difference Result 3558 states and 3832 transitions. [2022-04-05 06:25:43,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-04-05 06:25:43,256 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 68 [2022-04-05 06:25:43,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:25:43,330 INFO L225 Difference]: With dead ends: 3558 [2022-04-05 06:25:43,331 INFO L226 Difference]: Without dead ends: 2373 [2022-04-05 06:25:43,365 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2232 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2226, Invalid=5084, Unknown=0, NotChecked=0, Total=7310 [2022-04-05 06:25:43,365 INFO L913 BasicCegarLoop]: 64 mSDtfsCounter, 138 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 06:25:43,365 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 81 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 06:25:43,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2373 states. [2022-04-05 06:25:44,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2373 to 2365. [2022-04-05 06:25:44,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2365 states, 2116 states have (on average 1.1011342155009451) internal successors, (2330), 2276 states have internal predecessors, (2330), 85 states have call successors, (85), 5 states have call predecessors, (85), 163 states have return successors, (163), 83 states have call predecessors, (163), 83 states have call successors, (163) [2022-04-05 06:25:44,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2365 states to 2365 states and 2578 transitions. [2022-04-05 06:25:44,815 INFO L78 Accepts]: Start accepts. Automaton has 2365 states and 2578 transitions. Word has length 68 [2022-04-05 06:25:44,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:25:44,815 INFO L478 AbstractCegarLoop]: Abstraction has 2365 states and 2578 transitions. [2022-04-05 06:25:44,815 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:25:44,815 INFO L276 IsEmpty]: Start isEmpty. Operand 2365 states and 2578 transitions. [2022-04-05 06:25:44,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-05 06:25:44,839 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:25:44,839 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:25:44,856 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Ended with exit code 0 [2022-04-05 06:25:45,039 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2022-04-05 06:25:45,039 INFO L403 AbstractCegarLoop]: === Iteration 162 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:25:45,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:25:45,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1902034277, now seen corresponding path program 152 times [2022-04-05 06:25:45,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:25:45,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593316102] [2022-04-05 06:25:45,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:25:45,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:25:45,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:25:45,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:25:45,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:25:45,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:25:45,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:25:45,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-05 06:25:45,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:25:45,198 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-04-05 06:25:45,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:25:45,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593316102] [2022-04-05 06:25:45,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593316102] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:25:45,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936326290] [2022-04-05 06:25:45,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 06:25:45,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:25:45,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:25:45,199 INFO L229 MonitoredProcess]: Starting monitored process 153 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:25:45,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2022-04-05 06:25:45,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 06:25:45,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:25:45,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-05 06:25:45,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:25:45,595 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-04-05 06:25:45,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:25:45,676 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-04-05 06:25:45,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936326290] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:25:45,676 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:25:45,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 31 [2022-04-05 06:25:45,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950742882] [2022-04-05 06:25:45,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:25:45,676 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-05 06:25:45,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:25:45,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-05 06:25:45,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2022-04-05 06:25:45,677 INFO L87 Difference]: Start difference. First operand 2365 states and 2578 transitions. Second operand has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-05 06:25:47,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:25:47,922 INFO L93 Difference]: Finished difference Result 2439 states and 2668 transitions. [2022-04-05 06:25:47,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-04-05 06:25:47,922 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 68 [2022-04-05 06:25:47,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:25:47,936 INFO L225 Difference]: With dead ends: 2439 [2022-04-05 06:25:47,936 INFO L226 Difference]: Without dead ends: 2382 [2022-04-05 06:25:47,966 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2232 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2226, Invalid=5084, Unknown=0, NotChecked=0, Total=7310 [2022-04-05 06:25:47,966 INFO L913 BasicCegarLoop]: 64 mSDtfsCounter, 123 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 06:25:47,966 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 86 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 06:25:47,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2382 states. [2022-04-05 06:25:49,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2382 to 2382. [2022-04-05 06:25:49,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2382 states, 2133 states have (on average 1.1003281762775434) internal successors, (2347), 2293 states have internal predecessors, (2347), 85 states have call successors, (85), 5 states have call predecessors, (85), 163 states have return successors, (163), 83 states have call predecessors, (163), 83 states have call successors, (163) [2022-04-05 06:25:49,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2382 states to 2382 states and 2595 transitions. [2022-04-05 06:25:49,524 INFO L78 Accepts]: Start accepts. Automaton has 2382 states and 2595 transitions. Word has length 68 [2022-04-05 06:25:49,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:25:49,525 INFO L478 AbstractCegarLoop]: Abstraction has 2382 states and 2595 transitions. [2022-04-05 06:25:49,525 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-05 06:25:49,525 INFO L276 IsEmpty]: Start isEmpty. Operand 2382 states and 2595 transitions. [2022-04-05 06:25:49,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-05 06:25:49,549 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:25:49,549 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:25:49,566 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Ended with exit code 0 [2022-04-05 06:25:49,750 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:25:49,750 INFO L403 AbstractCegarLoop]: === Iteration 163 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:25:49,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:25:49,750 INFO L85 PathProgramCache]: Analyzing trace with hash -660421214, now seen corresponding path program 153 times [2022-04-05 06:25:49,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:25:49,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665473221] [2022-04-05 06:25:49,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:25:49,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:25:49,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:25:49,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:25:49,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:25:49,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:25:49,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:25:50,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-05 06:25:50,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:25:50,670 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 06:25:50,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:25:50,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665473221] [2022-04-05 06:25:50,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665473221] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:25:50,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635518336] [2022-04-05 06:25:50,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 06:25:50,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:25:50,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:25:50,671 INFO L229 MonitoredProcess]: Starting monitored process 154 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:25:50,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2022-04-05 06:25:50,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-04-05 06:25:50,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:25:50,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 95 conjunts are in the unsatisfiable core [2022-04-05 06:25:50,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:25:51,246 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 06:25:51,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:25:51,533 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 06:25:51,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635518336] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:25:51,533 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:25:51,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 50] total 57 [2022-04-05 06:25:51,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965339263] [2022-04-05 06:25:51,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:25:51,534 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-04-05 06:25:51,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:25:51,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-04-05 06:25:51,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=3071, Unknown=0, NotChecked=0, Total=3192 [2022-04-05 06:25:51,535 INFO L87 Difference]: Start difference. First operand 2382 states and 2595 transitions. Second operand has 57 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 51 states have internal predecessors, (69), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:25:58,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:25:58,043 INFO L93 Difference]: Finished difference Result 2590 states and 2824 transitions. [2022-04-05 06:25:58,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-04-05 06:25:58,043 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 51 states have internal predecessors, (69), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 69 [2022-04-05 06:25:58,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:25:58,128 INFO L225 Difference]: With dead ends: 2590 [2022-04-05 06:25:58,129 INFO L226 Difference]: Without dead ends: 2584 [2022-04-05 06:25:58,159 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 132 SyntacticMatches, 5 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1477 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=349, Invalid=10781, Unknown=0, NotChecked=0, Total=11130 [2022-04-05 06:25:58,160 INFO L913 BasicCegarLoop]: 186 mSDtfsCounter, 398 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 14203 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 14279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 14203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-04-05 06:25:58,160 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [408 Valid, 433 Invalid, 14279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 14203 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-04-05 06:25:58,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2584 states. [2022-04-05 06:25:59,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2584 to 2398. [2022-04-05 06:25:59,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2398 states, 2146 states have (on average 1.1006523765144456) internal successors, (2362), 2308 states have internal predecessors, (2362), 86 states have call successors, (86), 5 states have call predecessors, (86), 165 states have return successors, (166), 84 states have call predecessors, (166), 84 states have call successors, (166) [2022-04-05 06:25:59,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2398 states to 2398 states and 2614 transitions. [2022-04-05 06:25:59,668 INFO L78 Accepts]: Start accepts. Automaton has 2398 states and 2614 transitions. Word has length 69 [2022-04-05 06:25:59,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:25:59,669 INFO L478 AbstractCegarLoop]: Abstraction has 2398 states and 2614 transitions. [2022-04-05 06:25:59,669 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 51 states have internal predecessors, (69), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:25:59,669 INFO L276 IsEmpty]: Start isEmpty. Operand 2398 states and 2614 transitions. [2022-04-05 06:25:59,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-05 06:25:59,695 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:25:59,695 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:25:59,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Forceful destruction successful, exit code 0 [2022-04-05 06:25:59,895 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:25:59,896 INFO L403 AbstractCegarLoop]: === Iteration 164 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:25:59,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:25:59,896 INFO L85 PathProgramCache]: Analyzing trace with hash 452443879, now seen corresponding path program 154 times [2022-04-05 06:25:59,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:25:59,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678671700] [2022-04-05 06:25:59,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:25:59,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:25:59,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:25:59,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:25:59,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:25:59,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:25:59,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:26:00,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-05 06:26:00,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:26:00,752 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 246 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-05 06:26:00,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:26:00,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678671700] [2022-04-05 06:26:00,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678671700] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:26:00,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209678522] [2022-04-05 06:26:00,753 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 06:26:00,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:26:00,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:26:00,754 INFO L229 MonitoredProcess]: Starting monitored process 155 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:26:00,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2022-04-05 06:26:00,896 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 06:26:00,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:26:00,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 91 conjunts are in the unsatisfiable core [2022-04-05 06:26:00,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:26:01,438 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 246 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-05 06:26:01,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:26:01,845 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 246 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-05 06:26:01,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209678522] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:26:01,846 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:26:01,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 57 [2022-04-05 06:26:01,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133938430] [2022-04-05 06:26:01,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:26:01,846 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-04-05 06:26:01,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:26:01,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-04-05 06:26:01,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=3067, Unknown=0, NotChecked=0, Total=3192 [2022-04-05 06:26:01,847 INFO L87 Difference]: Start difference. First operand 2398 states and 2614 transitions. Second operand has 57 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 51 states have internal predecessors, (69), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:26:07,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:26:07,888 INFO L93 Difference]: Finished difference Result 2404 states and 2619 transitions. [2022-04-05 06:26:07,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-04-05 06:26:07,889 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 51 states have internal predecessors, (69), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 69 [2022-04-05 06:26:07,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:26:07,902 INFO L225 Difference]: With dead ends: 2404 [2022-04-05 06:26:07,902 INFO L226 Difference]: Without dead ends: 2382 [2022-04-05 06:26:07,932 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 126 SyntacticMatches, 9 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1496 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=351, Invalid=10361, Unknown=0, NotChecked=0, Total=10712 [2022-04-05 06:26:07,933 INFO L913 BasicCegarLoop]: 174 mSDtfsCounter, 307 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 13182 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 13234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 13182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-04-05 06:26:07,933 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 421 Invalid, 13234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 13182 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-04-05 06:26:07,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2382 states. [2022-04-05 06:26:09,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2382 to 2382. [2022-04-05 06:26:09,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2382 states, 2133 states have (on average 1.1003281762775434) internal successors, (2347), 2293 states have internal predecessors, (2347), 85 states have call successors, (85), 5 states have call predecessors, (85), 163 states have return successors, (164), 83 states have call predecessors, (164), 83 states have call successors, (164) [2022-04-05 06:26:09,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2382 states to 2382 states and 2596 transitions. [2022-04-05 06:26:09,513 INFO L78 Accepts]: Start accepts. Automaton has 2382 states and 2596 transitions. Word has length 69 [2022-04-05 06:26:09,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:26:09,513 INFO L478 AbstractCegarLoop]: Abstraction has 2382 states and 2596 transitions. [2022-04-05 06:26:09,513 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 51 states have internal predecessors, (69), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:26:09,513 INFO L276 IsEmpty]: Start isEmpty. Operand 2382 states and 2596 transitions. [2022-04-05 06:26:09,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-05 06:26:09,537 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:26:09,537 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:26:09,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Forceful destruction successful, exit code 0 [2022-04-05 06:26:09,737 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:26:09,738 INFO L403 AbstractCegarLoop]: === Iteration 165 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:26:09,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:26:09,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1376546114, now seen corresponding path program 155 times [2022-04-05 06:26:09,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:26:09,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270090966] [2022-04-05 06:26:09,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:26:09,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:26:09,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:26:09,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:26:09,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:26:09,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:26:09,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:26:10,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-05 06:26:10,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:26:10,544 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 06:26:10,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:26:10,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270090966] [2022-04-05 06:26:10,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270090966] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:26:10,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185691948] [2022-04-05 06:26:10,545 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 06:26:10,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:26:10,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:26:10,546 INFO L229 MonitoredProcess]: Starting monitored process 156 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:26:10,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2022-04-05 06:26:10,685 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-04-05 06:26:10,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:26:10,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 87 conjunts are in the unsatisfiable core [2022-04-05 06:26:10,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:26:11,273 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 06:26:11,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:26:11,582 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 06:26:11,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185691948] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:26:11,583 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:26:11,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 57 [2022-04-05 06:26:11,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50459954] [2022-04-05 06:26:11,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:26:11,583 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-04-05 06:26:11,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:26:11,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-04-05 06:26:11,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=3063, Unknown=0, NotChecked=0, Total=3192 [2022-04-05 06:26:11,584 INFO L87 Difference]: Start difference. First operand 2382 states and 2596 transitions. Second operand has 57 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 51 states have internal predecessors, (69), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:26:16,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:26:16,830 INFO L93 Difference]: Finished difference Result 2388 states and 2601 transitions. [2022-04-05 06:26:16,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-04-05 06:26:16,830 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 51 states have internal predecessors, (69), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 69 [2022-04-05 06:26:16,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:26:16,843 INFO L225 Difference]: With dead ends: 2388 [2022-04-05 06:26:16,844 INFO L226 Difference]: Without dead ends: 2364 [2022-04-05 06:26:16,872 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 124 SyntacticMatches, 9 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1501 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=353, Invalid=9949, Unknown=0, NotChecked=0, Total=10302 [2022-04-05 06:26:16,872 INFO L913 BasicCegarLoop]: 154 mSDtfsCounter, 271 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 10539 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 10591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 10539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-04-05 06:26:16,873 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 376 Invalid, 10591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 10539 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-04-05 06:26:16,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2364 states. [2022-04-05 06:26:18,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2364 to 2364. [2022-04-05 06:26:18,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2364 states, 2118 states have (on average 1.1000944287063268) internal successors, (2330), 2276 states have internal predecessors, (2330), 84 states have call successors, (84), 5 states have call predecessors, (84), 161 states have return successors, (162), 82 states have call predecessors, (162), 82 states have call successors, (162) [2022-04-05 06:26:18,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2364 states to 2364 states and 2576 transitions. [2022-04-05 06:26:18,340 INFO L78 Accepts]: Start accepts. Automaton has 2364 states and 2576 transitions. Word has length 69 [2022-04-05 06:26:18,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:26:18,340 INFO L478 AbstractCegarLoop]: Abstraction has 2364 states and 2576 transitions. [2022-04-05 06:26:18,340 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 51 states have internal predecessors, (69), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:26:18,340 INFO L276 IsEmpty]: Start isEmpty. Operand 2364 states and 2576 transitions. [2022-04-05 06:26:18,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-05 06:26:18,365 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:26:18,365 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:26:18,382 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Ended with exit code 0 [2022-04-05 06:26:18,567 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:26:18,567 INFO L403 AbstractCegarLoop]: === Iteration 166 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:26:18,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:26:18,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1678300345, now seen corresponding path program 156 times [2022-04-05 06:26:18,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:26:18,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888723175] [2022-04-05 06:26:18,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:26:18,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:26:18,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:26:18,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:26:18,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:26:18,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:26:18,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:26:18,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-05 06:26:18,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:26:19,308 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 152 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-05 06:26:19,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:26:19,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888723175] [2022-04-05 06:26:19,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888723175] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:26:19,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236876689] [2022-04-05 06:26:19,308 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-05 06:26:19,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:26:19,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:26:19,309 INFO L229 MonitoredProcess]: Starting monitored process 157 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:26:19,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2022-04-05 06:26:19,450 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-05 06:26:19,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:26:19,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 83 conjunts are in the unsatisfiable core [2022-04-05 06:26:19,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:26:20,081 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 152 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-05 06:26:20,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:26:20,459 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 152 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-05 06:26:20,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236876689] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:26:20,460 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:26:20,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 57 [2022-04-05 06:26:20,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488578599] [2022-04-05 06:26:20,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:26:20,460 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-04-05 06:26:20,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:26:20,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-04-05 06:26:20,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=3059, Unknown=0, NotChecked=0, Total=3192 [2022-04-05 06:26:20,461 INFO L87 Difference]: Start difference. First operand 2364 states and 2576 transitions. Second operand has 57 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 51 states have internal predecessors, (69), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:26:25,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:26:25,392 INFO L93 Difference]: Finished difference Result 2370 states and 2581 transitions. [2022-04-05 06:26:25,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-04-05 06:26:25,392 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 51 states have internal predecessors, (69), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 69 [2022-04-05 06:26:25,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:26:25,405 INFO L225 Difference]: With dead ends: 2370 [2022-04-05 06:26:25,405 INFO L226 Difference]: Without dead ends: 2344 [2022-04-05 06:26:25,433 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 122 SyntacticMatches, 9 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1506 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=355, Invalid=9545, Unknown=0, NotChecked=0, Total=9900 [2022-04-05 06:26:25,434 INFO L913 BasicCegarLoop]: 134 mSDtfsCounter, 234 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 9851 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 9901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 9851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-04-05 06:26:25,434 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 371 Invalid, 9901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 9851 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-04-05 06:26:25,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2344 states. [2022-04-05 06:26:26,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2344 to 2344. [2022-04-05 06:26:26,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2344 states, 2101 states have (on average 1.0999524036173252) internal successors, (2311), 2257 states have internal predecessors, (2311), 83 states have call successors, (83), 5 states have call predecessors, (83), 159 states have return successors, (160), 81 states have call predecessors, (160), 81 states have call successors, (160) [2022-04-05 06:26:26,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2344 states to 2344 states and 2554 transitions. [2022-04-05 06:26:26,979 INFO L78 Accepts]: Start accepts. Automaton has 2344 states and 2554 transitions. Word has length 69 [2022-04-05 06:26:26,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:26:26,979 INFO L478 AbstractCegarLoop]: Abstraction has 2344 states and 2554 transitions. [2022-04-05 06:26:26,979 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 51 states have internal predecessors, (69), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:26:26,980 INFO L276 IsEmpty]: Start isEmpty. Operand 2344 states and 2554 transitions. [2022-04-05 06:26:27,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-05 06:26:27,002 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:26:27,002 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:26:27,018 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Ended with exit code 0 [2022-04-05 06:26:27,203 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:26:27,203 INFO L403 AbstractCegarLoop]: === Iteration 167 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:26:27,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:26:27,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1664979742, now seen corresponding path program 157 times [2022-04-05 06:26:27,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:26:27,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901193612] [2022-04-05 06:26:27,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:26:27,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:26:27,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:26:27,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:26:27,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:26:27,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:26:27,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:26:27,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-05 06:26:27,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:26:27,888 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-05 06:26:27,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:26:27,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901193612] [2022-04-05 06:26:27,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901193612] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:26:27,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698900666] [2022-04-05 06:26:27,888 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-05 06:26:27,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:26:27,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:26:27,889 INFO L229 MonitoredProcess]: Starting monitored process 158 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:26:27,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2022-04-05 06:26:28,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:26:28,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 79 conjunts are in the unsatisfiable core [2022-04-05 06:26:28,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:26:28,721 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-05 06:26:28,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:26:29,014 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-05 06:26:29,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698900666] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:26:29,014 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:26:29,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 57 [2022-04-05 06:26:29,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737434254] [2022-04-05 06:26:29,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:26:29,015 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-04-05 06:26:29,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:26:29,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-04-05 06:26:29,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=3055, Unknown=0, NotChecked=0, Total=3192 [2022-04-05 06:26:29,015 INFO L87 Difference]: Start difference. First operand 2344 states and 2554 transitions. Second operand has 57 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 51 states have internal predecessors, (69), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:26:33,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:26:33,555 INFO L93 Difference]: Finished difference Result 2350 states and 2559 transitions. [2022-04-05 06:26:33,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-04-05 06:26:33,556 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 51 states have internal predecessors, (69), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 69 [2022-04-05 06:26:33,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:26:33,569 INFO L225 Difference]: With dead ends: 2350 [2022-04-05 06:26:33,569 INFO L226 Difference]: Without dead ends: 2322 [2022-04-05 06:26:33,598 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 120 SyntacticMatches, 9 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1511 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=357, Invalid=9149, Unknown=0, NotChecked=0, Total=9506 [2022-04-05 06:26:33,598 INFO L913 BasicCegarLoop]: 114 mSDtfsCounter, 199 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 8271 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 8319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 8271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-04-05 06:26:33,598 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 346 Invalid, 8319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 8271 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-04-05 06:26:33,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2322 states. [2022-04-05 06:26:35,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2322 to 2322. [2022-04-05 06:26:35,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2322 states, 2082 states have (on average 1.0999039385206533) internal successors, (2290), 2236 states have internal predecessors, (2290), 82 states have call successors, (82), 5 states have call predecessors, (82), 157 states have return successors, (158), 80 states have call predecessors, (158), 80 states have call successors, (158) [2022-04-05 06:26:35,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2322 states to 2322 states and 2530 transitions. [2022-04-05 06:26:35,023 INFO L78 Accepts]: Start accepts. Automaton has 2322 states and 2530 transitions. Word has length 69 [2022-04-05 06:26:35,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:26:35,024 INFO L478 AbstractCegarLoop]: Abstraction has 2322 states and 2530 transitions. [2022-04-05 06:26:35,024 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 51 states have internal predecessors, (69), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:26:35,024 INFO L276 IsEmpty]: Start isEmpty. Operand 2322 states and 2530 transitions. [2022-04-05 06:26:35,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-05 06:26:35,047 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:26:35,047 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:26:35,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Forceful destruction successful, exit code 0 [2022-04-05 06:26:35,247 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2022-04-05 06:26:35,247 INFO L403 AbstractCegarLoop]: === Iteration 168 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:26:35,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:26:35,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1941782439, now seen corresponding path program 158 times [2022-04-05 06:26:35,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:26:35,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647564224] [2022-04-05 06:26:35,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:26:35,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:26:35,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:26:35,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:26:35,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:26:35,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:26:35,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:26:35,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-05 06:26:35,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:26:35,887 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-05 06:26:35,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:26:35,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647564224] [2022-04-05 06:26:35,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647564224] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:26:35,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344320155] [2022-04-05 06:26:35,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 06:26:35,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:26:35,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:26:35,889 INFO L229 MonitoredProcess]: Starting monitored process 159 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:26:35,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2022-04-05 06:26:36,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 06:26:36,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:26:36,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 75 conjunts are in the unsatisfiable core [2022-04-05 06:26:36,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:26:36,824 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-05 06:26:36,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:26:37,139 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-05 06:26:37,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344320155] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:26:37,139 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:26:37,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 57 [2022-04-05 06:26:37,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492691989] [2022-04-05 06:26:37,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:26:37,139 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-04-05 06:26:37,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:26:37,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-04-05 06:26:37,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=3051, Unknown=0, NotChecked=0, Total=3192 [2022-04-05 06:26:37,140 INFO L87 Difference]: Start difference. First operand 2322 states and 2530 transitions. Second operand has 57 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 51 states have internal predecessors, (69), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:26:41,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:26:41,225 INFO L93 Difference]: Finished difference Result 2328 states and 2535 transitions. [2022-04-05 06:26:41,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-04-05 06:26:41,225 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 51 states have internal predecessors, (69), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 69 [2022-04-05 06:26:41,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:26:41,238 INFO L225 Difference]: With dead ends: 2328 [2022-04-05 06:26:41,238 INFO L226 Difference]: Without dead ends: 2298 [2022-04-05 06:26:41,266 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 118 SyntacticMatches, 9 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1516 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=359, Invalid=8761, Unknown=0, NotChecked=0, Total=9120 [2022-04-05 06:26:41,267 INFO L913 BasicCegarLoop]: 94 mSDtfsCounter, 162 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 6641 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 6687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 6641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-04-05 06:26:41,267 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 316 Invalid, 6687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 6641 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-04-05 06:26:41,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2298 states. [2022-04-05 06:26:42,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2298 to 2298. [2022-04-05 06:26:42,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2298 states, 2061 states have (on average 1.0999514798641437) internal successors, (2267), 2213 states have internal predecessors, (2267), 81 states have call successors, (81), 5 states have call predecessors, (81), 155 states have return successors, (156), 79 states have call predecessors, (156), 79 states have call successors, (156) [2022-04-05 06:26:42,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2298 states to 2298 states and 2504 transitions. [2022-04-05 06:26:42,683 INFO L78 Accepts]: Start accepts. Automaton has 2298 states and 2504 transitions. Word has length 69 [2022-04-05 06:26:42,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:26:42,683 INFO L478 AbstractCegarLoop]: Abstraction has 2298 states and 2504 transitions. [2022-04-05 06:26:42,683 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 51 states have internal predecessors, (69), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:26:42,683 INFO L276 IsEmpty]: Start isEmpty. Operand 2298 states and 2504 transitions. [2022-04-05 06:26:42,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-05 06:26:42,706 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:26:42,706 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:26:42,722 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Ended with exit code 0 [2022-04-05 06:26:42,906 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167,159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:26:42,907 INFO L403 AbstractCegarLoop]: === Iteration 169 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:26:42,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:26:42,907 INFO L85 PathProgramCache]: Analyzing trace with hash 2046739586, now seen corresponding path program 159 times [2022-04-05 06:26:42,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:26:42,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580274045] [2022-04-05 06:26:42,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:26:42,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:26:42,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:26:42,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:26:42,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:26:42,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:26:42,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:26:43,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-05 06:26:43,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:26:43,501 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-05 06:26:43,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:26:43,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580274045] [2022-04-05 06:26:43,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580274045] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:26:43,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579282644] [2022-04-05 06:26:43,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 06:26:43,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:26:43,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:26:43,503 INFO L229 MonitoredProcess]: Starting monitored process 160 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:26:43,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2022-04-05 06:26:43,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-04-05 06:26:43,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:26:43,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 71 conjunts are in the unsatisfiable core [2022-04-05 06:26:43,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:26:44,441 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-05 06:26:44,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:26:44,723 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-05 06:26:44,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579282644] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:26:44,724 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:26:44,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 57 [2022-04-05 06:26:44,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230007649] [2022-04-05 06:26:44,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:26:44,724 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-04-05 06:26:44,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:26:44,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-04-05 06:26:44,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=3047, Unknown=0, NotChecked=0, Total=3192 [2022-04-05 06:26:44,725 INFO L87 Difference]: Start difference. First operand 2298 states and 2504 transitions. Second operand has 57 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 51 states have internal predecessors, (69), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4)