/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/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_7.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-19 23:10:47,145 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 23:10:47,146 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 23:10:47,179 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-19 23:10:47,180 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-19 23:10:47,181 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-19 23:10:47,182 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-19 23:10:47,183 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-19 23:10:47,185 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-19 23:10:47,185 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-19 23:10:47,186 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-19 23:10:47,187 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-19 23:10:47,188 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-19 23:10:47,188 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-19 23:10:47,189 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-19 23:10:47,190 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-19 23:10:47,191 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-19 23:10:47,192 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-19 23:10:47,193 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-19 23:10:47,195 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-19 23:10:47,196 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-19 23:10:47,197 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-19 23:10:47,198 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-19 23:10:47,199 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-19 23:10:47,200 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-19 23:10:47,202 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-19 23:10:47,202 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-19 23:10:47,203 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-19 23:10:47,203 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-19 23:10:47,204 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-19 23:10:47,205 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-19 23:10:47,205 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-19 23:10:47,205 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-19 23:10:47,206 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-19 23:10:47,207 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-19 23:10:47,207 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-19 23:10:47,208 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-19 23:10:47,208 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-19 23:10:47,208 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-19 23:10:47,209 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 23:10:47,209 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 23:10:47,210 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 23:10:47,211 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-03-19 23:10:47,235 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 23:10:47,236 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 23:10:47,236 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-19 23:10:47,236 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-19 23:10:47,237 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-19 23:10:47,238 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-19 23:10:47,239 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-19 23:10:47,239 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-19 23:10:47,239 INFO L138 SettingsManager]: * Use SBE=true [2022-03-19 23:10:47,240 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 23:10:47,240 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-19 23:10:47,240 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 23:10:47,240 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-19 23:10:47,240 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 23:10:47,240 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 23:10:47,241 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 23:10:47,241 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 23:10:47,241 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-19 23:10:47,241 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 23:10:47,241 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 23:10:47,241 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 23:10:47,241 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 23:10:47,242 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 23:10:47,242 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 23:10:47,242 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 23:10:47,242 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 23:10:47,242 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-19 23:10:47,242 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-19 23:10:47,242 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-19 23:10:47,243 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-19 23:10:47,243 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-19 23:10:47,243 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-19 23:10:47,243 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 23:10:47,243 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 23:10:47,455 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 23:10:47,481 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 23:10:47,483 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 23:10:47,484 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 23:10:47,485 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 23:10:47,486 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_7.c [2022-03-19 23:10:47,543 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9faf7eb99/085ad7754edf409aacd59efaa5fdb4ee/FLAG952b13b88 [2022-03-19 23:10:47,879 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 23:10:47,880 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_7.c [2022-03-19 23:10:47,884 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9faf7eb99/085ad7754edf409aacd59efaa5fdb4ee/FLAG952b13b88 [2022-03-19 23:10:48,311 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9faf7eb99/085ad7754edf409aacd59efaa5fdb4ee [2022-03-19 23:10:48,313 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 23:10:48,314 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 23:10:48,315 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 23:10:48,316 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 23:10:48,318 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 23:10:48,319 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 11:10:48" (1/1) ... [2022-03-19 23:10:48,319 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4548324a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:10:48, skipping insertion in model container [2022-03-19 23:10:48,320 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 11:10:48" (1/1) ... [2022-03-19 23:10:48,325 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 23:10:48,334 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 23:10:48,478 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_7.c[318,331] [2022-03-19 23:10:48,488 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 23:10:48,493 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 23:10:48,502 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_7.c[318,331] [2022-03-19 23:10:48,505 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 23:10:48,514 INFO L208 MainTranslator]: Completed translation [2022-03-19 23:10:48,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:10:48 WrapperNode [2022-03-19 23:10:48,515 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 23:10:48,516 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 23:10:48,516 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 23:10:48,516 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 23:10:48,524 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:10:48" (1/1) ... [2022-03-19 23:10:48,524 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:10:48" (1/1) ... [2022-03-19 23:10:48,531 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:10:48" (1/1) ... [2022-03-19 23:10:48,531 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:10:48" (1/1) ... [2022-03-19 23:10:48,535 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:10:48" (1/1) ... [2022-03-19 23:10:48,538 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:10:48" (1/1) ... [2022-03-19 23:10:48,545 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:10:48" (1/1) ... [2022-03-19 23:10:48,552 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 23:10:48,553 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 23:10:48,553 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 23:10:48,553 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 23:10:48,554 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:10:48" (1/1) ... [2022-03-19 23:10:48,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 23:10:48,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:10:48,580 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-19 23:10:48,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-19 23:10:48,620 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 23:10:48,620 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 23:10:48,620 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 23:10:48,621 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 23:10:48,621 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 23:10:48,621 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 23:10:48,622 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 23:10:48,622 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 23:10:48,622 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 23:10:48,622 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 23:10:48,622 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 23:10:48,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 23:10:48,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 23:10:48,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 23:10:48,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 23:10:48,622 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 23:10:48,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 23:10:48,675 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 23:10:48,676 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 23:10:48,746 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 23:10:48,750 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 23:10:48,751 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-19 23:10:48,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 11:10:48 BoogieIcfgContainer [2022-03-19 23:10:48,752 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 23:10:48,754 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 23:10:48,754 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 23:10:48,769 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 23:10:48,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 11:10:48" (1/3) ... [2022-03-19 23:10:48,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5652c4ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 11:10:48, skipping insertion in model container [2022-03-19 23:10:48,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:10:48" (2/3) ... [2022-03-19 23:10:48,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5652c4ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 11:10:48, skipping insertion in model container [2022-03-19 23:10:48,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 11:10:48" (3/3) ... [2022-03-19 23:10:48,787 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_7.c [2022-03-19 23:10:48,791 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-19 23:10:48,791 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 23:10:48,847 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 23:10:48,852 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=PETRI_NET, 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 [2022-03-19 23:10:48,853 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 23:10:48,872 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 23:10:48,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-19 23:10:48,876 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:10:48,876 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:10:48,883 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:10:48,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:10:48,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1168619535, now seen corresponding path program 1 times [2022-03-19 23:10:48,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:10:48,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385999411] [2022-03-19 23:10:48,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:10:48,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:10:48,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:10:49,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:10:49,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:10:49,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:10:49,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:10:49,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385999411] [2022-03-19 23:10:49,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385999411] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:10:49,026 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 23:10:49,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 23:10:49,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341907698] [2022-03-19 23:10:49,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:10:49,032 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-19 23:10:49,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:10:49,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-19 23:10:49,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 23:10:49,054 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:10:49,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:10:49,082 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2022-03-19 23:10:49,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-19 23:10:49,089 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 12 [2022-03-19 23:10:49,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:10:49,093 INFO L225 Difference]: With dead ends: 34 [2022-03-19 23:10:49,094 INFO L226 Difference]: Without dead ends: 14 [2022-03-19 23:10:49,096 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 23:10:49,099 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 14 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:10:49,100 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 25 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 23:10:49,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-03-19 23:10:49,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-03-19 23:10:49,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:10:49,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-03-19 23:10:49,129 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 12 [2022-03-19 23:10:49,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:10:49,130 INFO L478 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-03-19 23:10:49,130 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:10:49,130 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-03-19 23:10:49,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-19 23:10:49,131 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:10:49,131 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:10:49,131 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 23:10:49,131 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:10:49,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:10:49,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1458605129, now seen corresponding path program 1 times [2022-03-19 23:10:49,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:10:49,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151521334] [2022-03-19 23:10:49,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:10:49,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:10:49,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:10:49,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:10:49,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:10:49,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:10:49,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:10:49,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151521334] [2022-03-19 23:10:49,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151521334] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:10:49,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 23:10:49,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 23:10:49,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381897465] [2022-03-19 23:10:49,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:10:49,202 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 23:10:49,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:10:49,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 23:10:49,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 23:10:49,203 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:10:49,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:10:49,234 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2022-03-19 23:10:49,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 23:10:49,234 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 12 [2022-03-19 23:10:49,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:10:49,235 INFO L225 Difference]: With dead ends: 24 [2022-03-19 23:10:49,235 INFO L226 Difference]: Without dead ends: 16 [2022-03-19 23:10:49,235 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 23:10:49,237 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:10:49,237 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 21 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 23:10:49,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-03-19 23:10:49,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-03-19 23:10:49,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:10:49,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-03-19 23:10:49,242 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 12 [2022-03-19 23:10:49,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:10:49,242 INFO L478 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-03-19 23:10:49,242 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:10:49,242 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-03-19 23:10:49,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-19 23:10:49,243 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:10:49,243 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:10:49,243 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-19 23:10:49,244 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:10:49,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:10:49,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1316432198, now seen corresponding path program 1 times [2022-03-19 23:10:49,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:10:49,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609948310] [2022-03-19 23:10:49,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:10:49,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:10:49,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:10:49,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:10:49,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:10:49,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 23:10:49,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:10:49,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609948310] [2022-03-19 23:10:49,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609948310] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:10:49,300 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 23:10:49,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 23:10:49,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731429276] [2022-03-19 23:10:49,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:10:49,301 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 23:10:49,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:10:49,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 23:10:49,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 23:10:49,302 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:10:49,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:10:49,325 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2022-03-19 23:10:49,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 23:10:49,326 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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 14 [2022-03-19 23:10:49,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:10:49,326 INFO L225 Difference]: With dead ends: 22 [2022-03-19 23:10:49,326 INFO L226 Difference]: Without dead ends: 17 [2022-03-19 23:10:49,327 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 23:10:49,328 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 9 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:10:49,328 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 21 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 23:10:49,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-03-19 23:10:49,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-03-19 23:10:49,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:10:49,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-03-19 23:10:49,333 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 14 [2022-03-19 23:10:49,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:10:49,333 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-03-19 23:10:49,333 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:10:49,333 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-03-19 23:10:49,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-19 23:10:49,334 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:10:49,334 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:10:49,334 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-19 23:10:49,334 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:10:49,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:10:49,335 INFO L85 PathProgramCache]: Analyzing trace with hash -2119154711, now seen corresponding path program 1 times [2022-03-19 23:10:49,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:10:49,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198673835] [2022-03-19 23:10:49,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:10:49,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:10:49,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:10:49,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:10:49,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:10:49,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 23:10:49,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:10:49,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198673835] [2022-03-19 23:10:49,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198673835] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:10:49,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379924974] [2022-03-19 23:10:49,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:10:49,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:10:49,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:10:49,382 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:10:49,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 23:10:49,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:10:49,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-19 23:10:49,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:10:49,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 23:10:49,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:10:49,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 23:10:49,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379924974] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:10:49,565 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:10:49,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-19 23:10:49,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882543453] [2022-03-19 23:10:49,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:10:49,566 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 23:10:49,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:10:49,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 23:10:49,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-19 23:10:49,568 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:10:49,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:10:49,667 INFO L93 Difference]: Finished difference Result 31 states and 40 transitions. [2022-03-19 23:10:49,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 23:10:49,668 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-03-19 23:10:49,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:10:49,670 INFO L225 Difference]: With dead ends: 31 [2022-03-19 23:10:49,670 INFO L226 Difference]: Without dead ends: 22 [2022-03-19 23:10:49,670 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-03-19 23:10:49,672 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 18 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:10:49,672 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 30 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 23:10:49,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-03-19 23:10:49,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-03-19 23:10:49,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:10:49,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-03-19 23:10:49,679 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 15 [2022-03-19 23:10:49,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:10:49,679 INFO L478 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-03-19 23:10:49,679 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:10:49,679 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-03-19 23:10:49,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-19 23:10:49,680 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:10:49,680 INFO L499 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:10:49,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-19 23:10:49,895 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:10:49,896 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:10:49,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:10:49,896 INFO L85 PathProgramCache]: Analyzing trace with hash 694051964, now seen corresponding path program 1 times [2022-03-19 23:10:49,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:10:49,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866354951] [2022-03-19 23:10:49,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:10:49,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:10:49,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:10:49,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:10:49,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:10:49,983 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:10:49,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:10:49,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866354951] [2022-03-19 23:10:49,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866354951] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:10:49,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482273725] [2022-03-19 23:10:49,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:10:49,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:10:49,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:10:49,988 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:10:49,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 23:10:50,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:10:50,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 23:10:50,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:10:50,105 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:10:50,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:10:50,191 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:10:50,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482273725] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:10:50,197 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:10:50,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-03-19 23:10:50,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750878811] [2022-03-19 23:10:50,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:10:50,198 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 23:10:50,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:10:50,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 23:10:50,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-03-19 23:10:50,199 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:10:50,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:10:50,299 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2022-03-19 23:10:50,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 23:10:50,299 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-03-19 23:10:50,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:10:50,301 INFO L225 Difference]: With dead ends: 42 [2022-03-19 23:10:50,301 INFO L226 Difference]: Without dead ends: 30 [2022-03-19 23:10:50,303 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-03-19 23:10:50,308 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 16 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:10:50,308 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 36 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 23:10:50,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-19 23:10:50,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-03-19 23:10:50,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:10:50,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-03-19 23:10:50,325 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 21 [2022-03-19 23:10:50,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:10:50,326 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-03-19 23:10:50,326 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:10:50,326 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-03-19 23:10:50,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-19 23:10:50,327 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:10:50,327 INFO L499 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:10:50,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-19 23:10:50,543 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:10:50,543 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:10:50,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:10:50,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1530073712, now seen corresponding path program 2 times [2022-03-19 23:10:50,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:10:50,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160358075] [2022-03-19 23:10:50,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:10:50,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:10:50,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:10:50,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:10:50,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:10:50,680 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:10:50,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:10:50,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160358075] [2022-03-19 23:10:50,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160358075] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:10:50,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058102850] [2022-03-19 23:10:50,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:10:50,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:10:50,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:10:50,683 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:10:50,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 23:10:50,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:10:50,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:10:50,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-19 23:10:50,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:10:50,800 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:10:50,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:10:50,949 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:10:50,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058102850] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:10:50,949 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:10:50,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-03-19 23:10:50,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210528373] [2022-03-19 23:10:50,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:10:50,950 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 23:10:50,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:10:50,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 23:10:50,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-03-19 23:10:50,951 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:10:51,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:10:51,153 INFO L93 Difference]: Finished difference Result 58 states and 72 transitions. [2022-03-19 23:10:51,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 23:10:51,154 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-03-19 23:10:51,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:10:51,154 INFO L225 Difference]: With dead ends: 58 [2022-03-19 23:10:51,154 INFO L226 Difference]: Without dead ends: 46 [2022-03-19 23:10:51,155 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=377, Invalid=615, Unknown=0, NotChecked=0, Total=992 [2022-03-19 23:10:51,156 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 24 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:10:51,156 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 31 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 23:10:51,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-03-19 23:10:51,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-03-19 23:10:51,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 41 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:10:51,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2022-03-19 23:10:51,161 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 29 [2022-03-19 23:10:51,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:10:51,161 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2022-03-19 23:10:51,162 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:10:51,162 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2022-03-19 23:10:51,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-19 23:10:51,163 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:10:51,163 INFO L499 BasicCegarLoop]: trace histogram [16, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:10:51,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-19 23:10:51,371 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:10:51,371 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:10:51,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:10:51,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1073294760, now seen corresponding path program 3 times [2022-03-19 23:10:51,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:10:51,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17225222] [2022-03-19 23:10:51,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:10:51,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:10:51,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:10:51,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:10:51,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:10:51,587 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 45 proven. 210 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:10:51,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:10:51,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17225222] [2022-03-19 23:10:51,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17225222] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:10:51,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541167670] [2022-03-19 23:10:51,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 23:10:51,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:10:51,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:10:51,592 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:10:51,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-19 23:10:51,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-19 23:10:51,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:10:51,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-19 23:10:51,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:10:51,766 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 46 proven. 1 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-03-19 23:10:51,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:10:51,895 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 46 proven. 1 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-03-19 23:10:51,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541167670] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:10:51,895 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:10:51,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 5, 5] total 24 [2022-03-19 23:10:51,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386698275] [2022-03-19 23:10:51,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:10:51,896 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-19 23:10:51,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:10:51,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-19 23:10:51,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=387, Unknown=0, NotChecked=0, Total=552 [2022-03-19 23:10:51,897 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 states have internal predecessors, (60), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:10:52,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:10:52,265 INFO L93 Difference]: Finished difference Result 69 states and 82 transitions. [2022-03-19 23:10:52,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-19 23:10:52,265 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 states have internal predecessors, (60), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-03-19 23:10:52,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:10:52,266 INFO L225 Difference]: With dead ends: 69 [2022-03-19 23:10:52,266 INFO L226 Difference]: Without dead ends: 57 [2022-03-19 23:10:52,267 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=584, Invalid=1308, Unknown=0, NotChecked=0, Total=1892 [2022-03-19 23:10:52,268 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 47 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:10:52,268 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 38 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 23:10:52,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-03-19 23:10:52,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 51. [2022-03-19 23:10:52,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 46 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:10:52,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2022-03-19 23:10:52,275 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 45 [2022-03-19 23:10:52,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:10:52,275 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2022-03-19 23:10:52,275 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 states have internal predecessors, (60), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:10:52,276 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2022-03-19 23:10:52,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-19 23:10:52,277 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:10:52,277 INFO L499 BasicCegarLoop]: trace histogram [17, 15, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:10:52,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-19 23:10:52,495 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:10:52,495 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:10:52,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:10:52,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1292456146, now seen corresponding path program 4 times [2022-03-19 23:10:52,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:10:52,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546949993] [2022-03-19 23:10:52,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:10:52,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:10:52,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:10:52,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:10:52,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:10:52,682 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 48 proven. 240 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-19 23:10:52,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:10:52,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546949993] [2022-03-19 23:10:52,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546949993] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:10:52,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137425959] [2022-03-19 23:10:52,683 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 23:10:52,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:10:52,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:10:52,684 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:10:52,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-19 23:10:52,756 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 23:10:52,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:10:52,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-19 23:10:52,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:10:52,848 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 48 proven. 240 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-19 23:10:52,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:10:53,273 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 48 proven. 240 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-19 23:10:53,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137425959] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:10:53,273 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:10:53,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 36 [2022-03-19 23:10:53,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230417641] [2022-03-19 23:10:53,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:10:53,274 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-19 23:10:53,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:10:53,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-19 23:10:53,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-03-19 23:10:53,276 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 35 states have internal predecessors, (80), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:10:53,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:10:53,900 INFO L93 Difference]: Finished difference Result 100 states and 123 transitions. [2022-03-19 23:10:53,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-19 23:10:53,901 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 35 states have internal predecessors, (80), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-03-19 23:10:53,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:10:53,905 INFO L225 Difference]: With dead ends: 100 [2022-03-19 23:10:53,905 INFO L226 Difference]: Without dead ends: 85 [2022-03-19 23:10:53,907 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1718, Invalid=2838, Unknown=0, NotChecked=0, Total=4556 [2022-03-19 23:10:53,908 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 42 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:10:53,908 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 26 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 23:10:53,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-03-19 23:10:53,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2022-03-19 23:10:53,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.05) internal successors, (84), 80 states have internal predecessors, (84), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:10:53,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2022-03-19 23:10:53,936 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 50 [2022-03-19 23:10:53,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:10:53,937 INFO L478 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2022-03-19 23:10:53,937 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 35 states have internal predecessors, (80), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:10:53,937 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2022-03-19 23:10:53,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-03-19 23:10:53,938 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:10:53,938 INFO L499 BasicCegarLoop]: trace histogram [34, 32, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:10:53,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-19 23:10:54,138 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:10:54,139 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:10:54,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:10:54,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1446691295, now seen corresponding path program 5 times [2022-03-19 23:10:54,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:10:54,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482206993] [2022-03-19 23:10:54,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:10:54,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:10:54,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:10:54,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:10:54,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:10:54,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1166 backedges. 99 proven. 1056 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-19 23:10:54,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:10:54,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482206993] [2022-03-19 23:10:54,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482206993] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:10:54,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59553342] [2022-03-19 23:10:54,675 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 23:10:54,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:10:54,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:10:54,677 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:10:54,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-19 23:10:54,739 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 35 check-sat command(s) [2022-03-19 23:10:54,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:10:54,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-19 23:10:54,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:10:54,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1166 backedges. 99 proven. 1056 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-19 23:10:54,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:10:56,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1166 backedges. 99 proven. 1056 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-19 23:10:56,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59553342] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:10:56,283 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:10:56,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 70 [2022-03-19 23:10:56,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649062997] [2022-03-19 23:10:56,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:10:56,284 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-03-19 23:10:56,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:10:56,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-03-19 23:10:56,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2022-03-19 23:10:56,287 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand has 70 states, 70 states have (on average 2.1142857142857143) internal successors, (148), 69 states have internal predecessors, (148), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:10:58,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:10:58,161 INFO L93 Difference]: Finished difference Result 168 states and 208 transitions. [2022-03-19 23:10:58,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-19 23:10:58,161 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.1142857142857143) internal successors, (148), 69 states have internal predecessors, (148), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 84 [2022-03-19 23:10:58,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:10:58,164 INFO L225 Difference]: With dead ends: 168 [2022-03-19 23:10:58,164 INFO L226 Difference]: Without dead ends: 153 [2022-03-19 23:10:58,167 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2865 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=6903, Invalid=11457, Unknown=0, NotChecked=0, Total=18360 [2022-03-19 23:10:58,168 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 76 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 23:10:58,168 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 51 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 23:10:58,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-03-19 23:10:58,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2022-03-19 23:10:58,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 148 states have (on average 1.027027027027027) internal successors, (152), 148 states have internal predecessors, (152), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:10:58,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 156 transitions. [2022-03-19 23:10:58,190 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 156 transitions. Word has length 84 [2022-03-19 23:10:58,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:10:58,191 INFO L478 AbstractCegarLoop]: Abstraction has 153 states and 156 transitions. [2022-03-19 23:10:58,191 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.1142857142857143) internal successors, (148), 69 states have internal predecessors, (148), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:10:58,191 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 156 transitions. [2022-03-19 23:10:58,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-03-19 23:10:58,193 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:10:58,193 INFO L499 BasicCegarLoop]: trace histogram [68, 66, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:10:58,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-19 23:10:58,393 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:10:58,394 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:10:58,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:10:58,394 INFO L85 PathProgramCache]: Analyzing trace with hash 83957191, now seen corresponding path program 6 times [2022-03-19 23:10:58,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:10:58,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182250818] [2022-03-19 23:10:58,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:10:58,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:10:58,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:10:59,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:10:59,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:10:59,986 INFO L134 CoverageAnalysis]: Checked inductivity of 4634 backedges. 201 proven. 4422 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-19 23:10:59,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:10:59,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182250818] [2022-03-19 23:10:59,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182250818] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:10:59,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769865422] [2022-03-19 23:10:59,987 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 23:10:59,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:10:59,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:10:59,992 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:10:59,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-19 23:11:00,037 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 23:11:00,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:11:00,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-19 23:11:00,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:11:00,447 INFO L134 CoverageAnalysis]: Checked inductivity of 4634 backedges. 202 proven. 10 refuted. 0 times theorem prover too weak. 4422 trivial. 0 not checked. [2022-03-19 23:11:00,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:11:00,835 INFO L134 CoverageAnalysis]: Checked inductivity of 4634 backedges. 202 proven. 10 refuted. 0 times theorem prover too weak. 4422 trivial. 0 not checked. [2022-03-19 23:11:00,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769865422] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:11:00,835 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:11:00,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 8, 8] total 82 [2022-03-19 23:11:00,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18092373] [2022-03-19 23:11:00,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:11:00,836 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-03-19 23:11:00,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:11:00,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-03-19 23:11:00,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2438, Invalid=4204, Unknown=0, NotChecked=0, Total=6642 [2022-03-19 23:11:00,839 INFO L87 Difference]: Start difference. First operand 153 states and 156 transitions. Second operand has 82 states, 82 states have (on average 2.073170731707317) internal successors, (170), 81 states have internal predecessors, (170), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:11:03,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:11:03,472 INFO L93 Difference]: Finished difference Result 182 states and 198 transitions. [2022-03-19 23:11:03,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-03-19 23:11:03,472 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.073170731707317) internal successors, (170), 81 states have internal predecessors, (170), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 152 [2022-03-19 23:11:03,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:11:03,473 INFO L225 Difference]: With dead ends: 182 [2022-03-19 23:11:03,473 INFO L226 Difference]: Without dead ends: 167 [2022-03-19 23:11:03,478 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4003 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=8562, Invalid=16878, Unknown=0, NotChecked=0, Total=25440 [2022-03-19 23:11:03,478 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 151 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 23:11:03,478 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 68 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 23:11:03,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-03-19 23:11:03,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 161. [2022-03-19 23:11:03,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 156 states have (on average 1.0256410256410255) internal successors, (160), 156 states have internal predecessors, (160), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:11:03,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 164 transitions. [2022-03-19 23:11:03,490 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 164 transitions. Word has length 152 [2022-03-19 23:11:03,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:11:03,490 INFO L478 AbstractCegarLoop]: Abstraction has 161 states and 164 transitions. [2022-03-19 23:11:03,490 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.073170731707317) internal successors, (170), 81 states have internal predecessors, (170), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:11:03,491 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 164 transitions. [2022-03-19 23:11:03,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-03-19 23:11:03,493 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:11:03,493 INFO L499 BasicCegarLoop]: trace histogram [69, 67, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:11:03,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-19 23:11:03,714 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:11:03,715 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:11:03,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:11:03,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1337358826, now seen corresponding path program 7 times [2022-03-19 23:11:03,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:11:03,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141584813] [2022-03-19 23:11:03,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:11:03,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:11:03,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:11:05,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:11:05,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:11:05,291 INFO L134 CoverageAnalysis]: Checked inductivity of 4816 backedges. 204 proven. 4556 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-03-19 23:11:05,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:11:05,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141584813] [2022-03-19 23:11:05,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141584813] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:11:05,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162344986] [2022-03-19 23:11:05,291 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-19 23:11:05,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:11:05,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:11:05,292 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:11:05,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-19 23:11:05,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:11:05,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 69 conjunts are in the unsatisfiable core [2022-03-19 23:11:05,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:11:05,679 INFO L134 CoverageAnalysis]: Checked inductivity of 4816 backedges. 204 proven. 4556 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-03-19 23:11:05,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:11:10,110 INFO L134 CoverageAnalysis]: Checked inductivity of 4816 backedges. 204 proven. 4556 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-03-19 23:11:10,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162344986] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:11:10,111 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:11:10,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 70, 70] total 140 [2022-03-19 23:11:10,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253948616] [2022-03-19 23:11:10,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:11:10,112 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-03-19 23:11:10,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:11:10,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-03-19 23:11:10,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9593, Invalid=9867, Unknown=0, NotChecked=0, Total=19460 [2022-03-19 23:11:10,116 INFO L87 Difference]: Start difference. First operand 161 states and 164 transitions. Second operand has 140 states, 140 states have (on average 2.057142857142857) internal successors, (288), 139 states have internal predecessors, (288), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:11:16,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:11:16,447 INFO L93 Difference]: Finished difference Result 320 states and 395 transitions. [2022-03-19 23:11:16,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2022-03-19 23:11:16,448 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 2.057142857142857) internal successors, (288), 139 states have internal predecessors, (288), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 160 [2022-03-19 23:11:16,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:11:16,449 INFO L225 Difference]: With dead ends: 320 [2022-03-19 23:11:16,449 INFO L226 Difference]: Without dead ends: 299 [2022-03-19 23:11:16,455 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 527 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11860 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=28498, Invalid=47402, Unknown=0, NotChecked=0, Total=75900 [2022-03-19 23:11:16,455 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 146 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 23:11:16,455 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 36 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 23:11:16,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-03-19 23:11:16,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 299. [2022-03-19 23:11:16,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 294 states have (on average 1.0136054421768708) internal successors, (298), 294 states have internal predecessors, (298), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:11:16,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 302 transitions. [2022-03-19 23:11:16,474 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 302 transitions. Word has length 160 [2022-03-19 23:11:16,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:11:16,475 INFO L478 AbstractCegarLoop]: Abstraction has 299 states and 302 transitions. [2022-03-19 23:11:16,475 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 2.057142857142857) internal successors, (288), 139 states have internal predecessors, (288), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:11:16,475 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 302 transitions. [2022-03-19 23:11:16,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2022-03-19 23:11:16,479 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:11:16,479 INFO L499 BasicCegarLoop]: trace histogram [138, 136, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:11:16,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-19 23:11:16,696 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,SelfDestructingSolverStorable10 [2022-03-19 23:11:16,696 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:11:16,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:11:16,697 INFO L85 PathProgramCache]: Analyzing trace with hash 406418617, now seen corresponding path program 8 times [2022-03-19 23:11:16,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:11:16,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552943634] [2022-03-19 23:11:16,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:11:16,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:11:16,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:11:22,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:11:22,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:11:22,705 INFO L134 CoverageAnalysis]: Checked inductivity of 19099 backedges. 411 proven. 18632 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-03-19 23:11:22,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:11:22,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552943634] [2022-03-19 23:11:22,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552943634] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:11:22,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450779664] [2022-03-19 23:11:22,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:11:22,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:11:22,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:11:22,708 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:11:22,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-19 23:11:22,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:11:22,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:11:22,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 662 conjuncts, 138 conjunts are in the unsatisfiable core [2022-03-19 23:11:22,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:11:23,388 INFO L134 CoverageAnalysis]: Checked inductivity of 19099 backedges. 411 proven. 18632 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-03-19 23:11:23,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:11:40,697 INFO L134 CoverageAnalysis]: Checked inductivity of 19099 backedges. 411 proven. 18632 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-03-19 23:11:40,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450779664] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:11:40,698 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:11:40,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [140, 139, 139] total 278 [2022-03-19 23:11:40,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942592247] [2022-03-19 23:11:40,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:11:40,700 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 278 states [2022-03-19 23:11:40,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:11:40,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 278 interpolants. [2022-03-19 23:11:40,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38228, Invalid=38778, Unknown=0, NotChecked=0, Total=77006 [2022-03-19 23:11:40,712 INFO L87 Difference]: Start difference. First operand 299 states and 302 transitions. Second operand has 278 states, 278 states have (on average 2.028776978417266) internal successors, (564), 277 states have internal predecessors, (564), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:12:04,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:12:04,806 INFO L93 Difference]: Finished difference Result 596 states and 740 transitions. [2022-03-19 23:12:04,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 277 states. [2022-03-19 23:12:04,807 INFO L78 Accepts]: Start accepts. Automaton has has 278 states, 278 states have (on average 2.028776978417266) internal successors, (564), 277 states have internal predecessors, (564), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 298 [2022-03-19 23:12:04,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:12:04,809 INFO L225 Difference]: With dead ends: 596 [2022-03-19 23:12:04,809 INFO L226 Difference]: Without dead ends: 575 [2022-03-19 23:12:04,821 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1010 GetRequests, 460 SyntacticMatches, 0 SemanticMatches, 550 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47533 ImplicationChecksByTransitivity, 45.0s TimeCoverageRelationStatistics Valid=114127, Invalid=190025, Unknown=0, NotChecked=0, Total=304152 [2022-03-19 23:12:04,822 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 284 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 418 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 418 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 23:12:04,822 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 46 Invalid, 1019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [418 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 23:12:04,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2022-03-19 23:12:04,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 575. [2022-03-19 23:12:04,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 570 states have (on average 1.0070175438596491) internal successors, (574), 570 states have internal predecessors, (574), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:12:04,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 578 transitions. [2022-03-19 23:12:04,850 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 578 transitions. Word has length 298 [2022-03-19 23:12:04,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:12:04,851 INFO L478 AbstractCegarLoop]: Abstraction has 575 states and 578 transitions. [2022-03-19 23:12:04,852 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 278 states, 278 states have (on average 2.028776978417266) internal successors, (564), 277 states have internal predecessors, (564), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:12:04,852 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 578 transitions. [2022-03-19 23:12:04,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 575 [2022-03-19 23:12:04,861 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:12:04,862 INFO L499 BasicCegarLoop]: trace histogram [276, 274, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:12:04,884 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-03-19 23:12:05,081 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:12:05,082 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:12:05,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:12:05,082 INFO L85 PathProgramCache]: Analyzing trace with hash -36624873, now seen corresponding path program 9 times [2022-03-19 23:12:05,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:12:05,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613327789] [2022-03-19 23:12:05,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:12:05,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:12:05,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:12:28,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:12:28,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:12:28,212 INFO L134 CoverageAnalysis]: Checked inductivity of 76231 backedges. 825 proven. 75350 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-03-19 23:12:28,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:12:28,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613327789] [2022-03-19 23:12:28,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613327789] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:12:28,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809757763] [2022-03-19 23:12:28,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 23:12:28,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:12:28,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:12:28,216 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:12:28,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-19 23:12:28,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-19 23:12:28,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:12:28,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-19 23:12:28,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:12:30,211 INFO L134 CoverageAnalysis]: Checked inductivity of 76231 backedges. 826 proven. 55 refuted. 0 times theorem prover too weak. 75350 trivial. 0 not checked. [2022-03-19 23:12:30,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:12:32,209 INFO L134 CoverageAnalysis]: Checked inductivity of 76231 backedges. 826 proven. 55 refuted. 0 times theorem prover too weak. 75350 trivial. 0 not checked. [2022-03-19 23:12:32,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809757763] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:12:32,209 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:12:32,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [278, 14, 14] total 302 [2022-03-19 23:12:32,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892182070] [2022-03-19 23:12:32,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:12:32,211 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 302 states [2022-03-19 23:12:32,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:12:32,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 302 interpolants. [2022-03-19 23:12:32,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38552, Invalid=52350, Unknown=0, NotChecked=0, Total=90902 [2022-03-19 23:12:32,219 INFO L87 Difference]: Start difference. First operand 575 states and 578 transitions. Second operand has 302 states, 302 states have (on average 1.9801324503311257) internal successors, (598), 301 states have internal predecessors, (598), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:13:06,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:13:06,676 INFO L93 Difference]: Finished difference Result 616 states and 638 transitions. [2022-03-19 23:13:06,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 301 states. [2022-03-19 23:13:06,677 INFO L78 Accepts]: Start accepts. Automaton has has 302 states, 302 states have (on average 1.9801324503311257) internal successors, (598), 301 states have internal predecessors, (598), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 574 [2022-03-19 23:13:06,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:13:06,679 INFO L225 Difference]: With dead ends: 616 [2022-03-19 23:13:06,679 INFO L226 Difference]: Without dead ends: 595 [2022-03-19 23:13:06,692 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1724 GetRequests, 1126 SyntacticMatches, 0 SemanticMatches, 598 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51594 ImplicationChecksByTransitivity, 56.2s TimeCoverageRelationStatistics Valid=127438, Invalid=231962, Unknown=0, NotChecked=0, Total=359400 [2022-03-19 23:13:06,692 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 566 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 608 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 566 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 1293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 608 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 23:13:06,693 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [566 Valid, 73 Invalid, 1293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [608 Valid, 685 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 23:13:06,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2022-03-19 23:13:06,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 589. [2022-03-19 23:13:06,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 584 states have (on average 1.0068493150684932) internal successors, (588), 584 states have internal predecessors, (588), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:13:06,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 592 transitions. [2022-03-19 23:13:06,724 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 592 transitions. Word has length 574 [2022-03-19 23:13:06,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:13:06,725 INFO L478 AbstractCegarLoop]: Abstraction has 589 states and 592 transitions. [2022-03-19 23:13:06,725 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 302 states, 302 states have (on average 1.9801324503311257) internal successors, (598), 301 states have internal predecessors, (598), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:13:06,725 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 592 transitions. [2022-03-19 23:13:06,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 589 [2022-03-19 23:13:06,735 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:13:06,735 INFO L499 BasicCegarLoop]: trace histogram [277, 275, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:13:06,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-19 23:13:06,958 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-19 23:13:06,958 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:13:06,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:13:06,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1763200410, now seen corresponding path program 10 times [2022-03-19 23:13:06,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:13:06,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820041385] [2022-03-19 23:13:06,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:13:06,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:13:07,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:13:30,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:13:30,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:13:30,357 INFO L134 CoverageAnalysis]: Checked inductivity of 76982 backedges. 828 proven. 75900 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked. [2022-03-19 23:13:30,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:13:30,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820041385] [2022-03-19 23:13:30,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820041385] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:13:30,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700406776] [2022-03-19 23:13:30,358 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 23:13:30,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:13:30,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:13:30,359 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:13:30,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-19 23:13:30,529 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 23:13:30,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:13:30,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 1278 conjuncts, 277 conjunts are in the unsatisfiable core [2022-03-19 23:13:30,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:13:31,543 INFO L134 CoverageAnalysis]: Checked inductivity of 76982 backedges. 828 proven. 75900 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked. [2022-03-19 23:13:31,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:14:41,152 INFO L134 CoverageAnalysis]: Checked inductivity of 76982 backedges. 828 proven. 75900 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked. [2022-03-19 23:14:41,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700406776] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:14:41,153 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:14:41,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [279, 278, 278] total 556 [2022-03-19 23:14:41,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805151564] [2022-03-19 23:14:41,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:14:41,155 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 556 states [2022-03-19 23:14:41,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:14:41,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 556 interpolants. [2022-03-19 23:14:41,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153737, Invalid=154843, Unknown=0, NotChecked=0, Total=308580 [2022-03-19 23:14:41,195 INFO L87 Difference]: Start difference. First operand 589 states and 592 transitions. Second operand has 556 states, 556 states have (on average 2.014388489208633) internal successors, (1120), 555 states have internal predecessors, (1120), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:16:22,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:16:22,137 INFO L93 Difference]: Finished difference Result 1176 states and 1459 transitions. [2022-03-19 23:16:22,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 555 states. [2022-03-19 23:16:22,138 INFO L78 Accepts]: Start accepts. Automaton has has 556 states, 556 states have (on average 2.014388489208633) internal successors, (1120), 555 states have internal predecessors, (1120), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 588 [2022-03-19 23:16:22,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:16:22,143 INFO L225 Difference]: With dead ends: 1176 [2022-03-19 23:16:22,144 INFO L226 Difference]: Without dead ends: 1143 [2022-03-19 23:16:22,210 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 2007 GetRequests, 901 SyntacticMatches, 0 SemanticMatches, 1106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191676 ImplicationChecksByTransitivity, 184.9s TimeCoverageRelationStatistics Valid=460098, Invalid=766458, Unknown=0, NotChecked=0, Total=1226556 [2022-03-19 23:16:22,211 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 562 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1163 mSolverCounterSat, 834 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 1997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 834 IncrementalHoareTripleChecker+Valid, 1163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:16:22,211 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [562 Valid, 51 Invalid, 1997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [834 Valid, 1163 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-19 23:16:22,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1143 states. [2022-03-19 23:16:22,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1143 to 1143. [2022-03-19 23:16:22,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1143 states, 1138 states have (on average 1.0035149384885764) internal successors, (1142), 1138 states have internal predecessors, (1142), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:16:22,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1143 states to 1143 states and 1146 transitions. [2022-03-19 23:16:22,272 INFO L78 Accepts]: Start accepts. Automaton has 1143 states and 1146 transitions. Word has length 588 [2022-03-19 23:16:22,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:16:22,273 INFO L478 AbstractCegarLoop]: Abstraction has 1143 states and 1146 transitions. [2022-03-19 23:16:22,274 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 556 states, 556 states have (on average 2.014388489208633) internal successors, (1120), 555 states have internal predecessors, (1120), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:16:22,274 INFO L276 IsEmpty]: Start isEmpty. Operand 1143 states and 1146 transitions. [2022-03-19 23:16:22,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1143 [2022-03-19 23:16:22,284 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:16:22,285 INFO L499 BasicCegarLoop]: trace histogram [554, 552, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:16:22,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-19 23:16:22,487 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,SelfDestructingSolverStorable13 [2022-03-19 23:16:22,487 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:16:22,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:16:22,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1211298393, now seen corresponding path program 11 times [2022-03-19 23:16:22,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:16:22,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138464468] [2022-03-19 23:16:22,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:16:22,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:16:23,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:17:56,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:17:56,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:17:56,757 INFO L134 CoverageAnalysis]: Checked inductivity of 307169 backedges. 1659 proven. 305256 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked. [2022-03-19 23:17:56,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:17:56,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138464468] [2022-03-19 23:17:56,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138464468] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:17:56,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665442606] [2022-03-19 23:17:56,758 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 23:17:56,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:17:56,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:17:56,759 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:17:56,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-19 23:17:58,594 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 555 check-sat command(s) [2022-03-19 23:17:58,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:17:58,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 2386 conjuncts, 554 conjunts are in the unsatisfiable core [2022-03-19 23:17:58,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:18:00,547 INFO L134 CoverageAnalysis]: Checked inductivity of 307169 backedges. 1659 proven. 305256 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked. [2022-03-19 23:18:00,547 INFO L328 TraceCheckSpWp]: Computing backward predicates...