/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 06:26:07,322 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 06:26:07,324 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 06:26:07,359 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 06:26:07,360 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 06:26:07,362 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 06:26:07,364 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 06:26:07,366 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 06:26:07,367 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 06:26:07,371 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 06:26:07,372 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 06:26:07,372 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 06:26:07,372 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 06:26:07,373 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 06:26:07,374 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 06:26:07,374 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 06:26:07,375 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 06:26:07,376 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 06:26:07,377 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 06:26:07,380 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 06:26:07,381 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 06:26:07,383 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 06:26:07,383 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 06:26:07,384 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 06:26:07,392 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 06:26:07,393 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 06:26:07,393 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 06:26:07,394 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 06:26:07,395 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 06:26:07,395 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 06:26:07,395 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 06:26:07,396 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 06:26:07,397 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 06:26:07,398 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 06:26:07,398 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 06:26:07,398 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 06:26:07,399 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 06:26:07,399 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 06:26:07,399 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 06:26:07,400 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 06:26:07,400 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 06:26:07,402 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 [2023-04-02 06:26:07,425 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 06:26:07,425 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 06:26:07,425 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 06:26:07,425 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 06:26:07,427 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 06:26:07,427 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 06:26:07,427 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-02 06:26:07,427 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-02 06:26:07,427 INFO L138 SettingsManager]: * Use SBE=true [2023-04-02 06:26:07,428 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 06:26:07,428 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 06:26:07,428 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 06:26:07,429 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 06:26:07,429 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 06:26:07,429 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 06:26:07,429 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 06:26:07,429 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 06:26:07,429 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 06:26:07,429 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 06:26:07,429 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 06:26:07,429 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 06:26:07,430 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 06:26:07,430 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-02 06:26:07,430 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 06:26:07,430 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 06:26:07,430 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 06:26:07,430 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 06:26:07,431 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 06:26:07,431 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-02 06:26:07,431 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 06:26:07,431 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-02 06:26:07,431 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 06:26:07,432 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-02 06:26:07,432 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-02 06:26:07,432 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-02 06:26:07,432 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-02 06:26:07,698 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 06:26:07,722 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 06:26:07,725 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 06:26:07,726 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 06:26:07,726 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 06:26:07,727 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2023-04-02 06:26:08,852 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 06:26:09,044 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 06:26:09,045 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2023-04-02 06:26:09,052 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c8b7ccdf/2e59eb06b1a9419caedf5657cf1df7dd/FLAGb804f9139 [2023-04-02 06:26:09,063 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c8b7ccdf/2e59eb06b1a9419caedf5657cf1df7dd [2023-04-02 06:26:09,065 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 06:26:09,067 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 06:26:09,067 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 06:26:09,068 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 06:26:09,070 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 06:26:09,071 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 06:26:09" (1/1) ... [2023-04-02 06:26:09,072 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@456e2b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:26:09, skipping insertion in model container [2023-04-02 06:26:09,072 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 06:26:09" (1/1) ... [2023-04-02 06:26:09,080 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 06:26:09,108 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 06:26:09,266 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[4902,4915] [2023-04-02 06:26:09,288 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 06:26:09,307 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 06:26:09,334 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[4902,4915] [2023-04-02 06:26:09,349 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 06:26:09,364 INFO L208 MainTranslator]: Completed translation [2023-04-02 06:26:09,364 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:26:09 WrapperNode [2023-04-02 06:26:09,364 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 06:26:09,365 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 06:26:09,365 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 06:26:09,365 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 06:26:09,377 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:26:09" (1/1) ... [2023-04-02 06:26:09,377 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:26:09" (1/1) ... [2023-04-02 06:26:09,384 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:26:09" (1/1) ... [2023-04-02 06:26:09,384 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:26:09" (1/1) ... [2023-04-02 06:26:09,393 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:26:09" (1/1) ... [2023-04-02 06:26:09,403 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:26:09" (1/1) ... [2023-04-02 06:26:09,405 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:26:09" (1/1) ... [2023-04-02 06:26:09,407 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:26:09" (1/1) ... [2023-04-02 06:26:09,410 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 06:26:09,410 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 06:26:09,410 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 06:26:09,411 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 06:26:09,411 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:26:09" (1/1) ... [2023-04-02 06:26:09,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 06:26:09,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 06:26:09,453 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) [2023-04-02 06:26:09,458 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 [2023-04-02 06:26:09,483 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 06:26:09,484 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 06:26:09,484 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 06:26:09,484 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 06:26:09,484 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 06:26:09,484 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 06:26:09,484 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 06:26:09,484 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 06:26:09,485 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 06:26:09,485 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-02 06:26:09,485 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-02 06:26:09,485 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-02 06:26:09,485 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 06:26:09,485 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-02 06:26:09,485 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-02 06:26:09,485 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-02 06:26:09,485 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-02 06:26:09,485 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-02 06:26:09,485 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-02 06:26:09,485 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-02 06:26:09,486 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-02 06:26:09,486 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 06:26:09,486 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 06:26:09,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 06:26:09,486 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 06:26:09,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 06:26:09,486 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 06:26:09,486 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 06:26:09,593 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 06:26:09,596 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 06:26:10,040 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 06:26:10,047 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 06:26:10,047 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-02 06:26:10,049 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 06:26:10 BoogieIcfgContainer [2023-04-02 06:26:10,049 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 06:26:10,051 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 06:26:10,051 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 06:26:10,059 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 06:26:10,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 06:26:09" (1/3) ... [2023-04-02 06:26:10,059 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2790dfe0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 06:26:10, skipping insertion in model container [2023-04-02 06:26:10,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:26:09" (2/3) ... [2023-04-02 06:26:10,060 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2790dfe0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 06:26:10, skipping insertion in model container [2023-04-02 06:26:10,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 06:26:10" (3/3) ... [2023-04-02 06:26:10,061 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2023-04-02 06:26:10,079 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 06:26:10,079 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 06:26:10,114 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 06:26:10,119 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1145694e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-02 06:26:10,120 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 06:26:10,123 INFO L276 IsEmpty]: Start isEmpty. Operand has 85 states, 78 states have (on average 1.7179487179487178) internal successors, (134), 80 states have internal predecessors, (134), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 06:26:10,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-02 06:26:10,132 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:26:10,132 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:26:10,133 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:26:10,136 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:26:10,137 INFO L85 PathProgramCache]: Analyzing trace with hash 879954181, now seen corresponding path program 1 times [2023-04-02 06:26:10,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:26:10,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376594239] [2023-04-02 06:26:10,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:26:10,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:26:10,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:26:10,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:26:10,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:26:10,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:26:10,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:26:10,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376594239] [2023-04-02 06:26:10,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376594239] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:26:10,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:26:10,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:26:10,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248639249] [2023-04-02 06:26:10,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:26:10,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:26:10,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:26:10,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:26:10,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:26:10,697 INFO L87 Difference]: Start difference. First operand has 85 states, 78 states have (on average 1.7179487179487178) internal successors, (134), 80 states have internal predecessors, (134), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 3 states have internal predecessors, (48), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:26:11,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:26:11,187 INFO L93 Difference]: Finished difference Result 187 states and 293 transitions. [2023-04-02 06:26:11,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:26:11,190 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 3 states have internal predecessors, (48), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2023-04-02 06:26:11,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:26:11,198 INFO L225 Difference]: With dead ends: 187 [2023-04-02 06:26:11,198 INFO L226 Difference]: Without dead ends: 120 [2023-04-02 06:26:11,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:26:11,204 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 95 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 06:26:11,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 287 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 06:26:11,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2023-04-02 06:26:11,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 118. [2023-04-02 06:26:11,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 114 states have (on average 1.4385964912280702) internal successors, (164), 114 states have internal predecessors, (164), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:26:11,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 167 transitions. [2023-04-02 06:26:11,252 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 167 transitions. Word has length 51 [2023-04-02 06:26:11,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:26:11,253 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 167 transitions. [2023-04-02 06:26:11,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 3 states have internal predecessors, (48), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:26:11,253 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 167 transitions. [2023-04-02 06:26:11,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-04-02 06:26:11,255 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:26:11,255 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:26:11,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 06:26:11,255 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:26:11,256 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:26:11,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1400999361, now seen corresponding path program 1 times [2023-04-02 06:26:11,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:26:11,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881855153] [2023-04-02 06:26:11,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:26:11,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:26:11,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:26:11,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:26:11,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:26:11,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:26:11,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:26:11,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881855153] [2023-04-02 06:26:11,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881855153] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:26:11,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:26:11,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:26:11,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911177478] [2023-04-02 06:26:11,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:26:11,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:26:11,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:26:11,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:26:11,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:26:11,473 INFO L87 Difference]: Start difference. First operand 118 states and 167 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 3 states have internal predecessors, (49), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:26:11,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:26:11,931 INFO L93 Difference]: Finished difference Result 278 states and 415 transitions. [2023-04-02 06:26:11,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:26:11,931 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 3 states have internal predecessors, (49), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2023-04-02 06:26:11,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:26:11,937 INFO L225 Difference]: With dead ends: 278 [2023-04-02 06:26:11,938 INFO L226 Difference]: Without dead ends: 190 [2023-04-02 06:26:11,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:26:11,947 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 64 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 06:26:11,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 232 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 06:26:11,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2023-04-02 06:26:11,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 188. [2023-04-02 06:26:11,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 184 states have (on average 1.4782608695652173) internal successors, (272), 184 states have internal predecessors, (272), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:26:11,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 275 transitions. [2023-04-02 06:26:11,978 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 275 transitions. Word has length 52 [2023-04-02 06:26:11,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:26:11,978 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 275 transitions. [2023-04-02 06:26:11,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 3 states have internal predecessors, (49), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:26:11,978 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 275 transitions. [2023-04-02 06:26:11,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-02 06:26:11,979 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:26:11,980 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:26:11,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 06:26:11,980 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:26:11,980 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:26:11,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1897631098, now seen corresponding path program 1 times [2023-04-02 06:26:11,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:26:11,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218897624] [2023-04-02 06:26:11,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:26:11,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:26:12,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:26:12,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:26:12,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:26:12,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:26:12,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:26:12,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218897624] [2023-04-02 06:26:12,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218897624] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:26:12,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:26:12,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:26:12,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172185095] [2023-04-02 06:26:12,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:26:12,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:26:12,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:26:12,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:26:12,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:26:12,233 INFO L87 Difference]: Start difference. First operand 188 states and 275 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:26:12,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:26:12,607 INFO L93 Difference]: Finished difference Result 472 states and 713 transitions. [2023-04-02 06:26:12,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:26:12,607 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2023-04-02 06:26:12,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:26:12,609 INFO L225 Difference]: With dead ends: 472 [2023-04-02 06:26:12,609 INFO L226 Difference]: Without dead ends: 314 [2023-04-02 06:26:12,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:26:12,611 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 59 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 06:26:12,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 228 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 06:26:12,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2023-04-02 06:26:12,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 312. [2023-04-02 06:26:12,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 308 states have (on average 1.4935064935064934) internal successors, (460), 308 states have internal predecessors, (460), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:26:12,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 463 transitions. [2023-04-02 06:26:12,648 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 463 transitions. Word has length 53 [2023-04-02 06:26:12,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:26:12,648 INFO L495 AbstractCegarLoop]: Abstraction has 312 states and 463 transitions. [2023-04-02 06:26:12,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:26:12,648 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 463 transitions. [2023-04-02 06:26:12,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-04-02 06:26:12,650 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:26:12,650 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:26:12,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 06:26:12,650 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:26:12,650 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:26:12,651 INFO L85 PathProgramCache]: Analyzing trace with hash -437244205, now seen corresponding path program 1 times [2023-04-02 06:26:12,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:26:12,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600094387] [2023-04-02 06:26:12,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:26:12,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:26:12,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:26:12,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:26:12,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:26:12,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:26:12,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:26:12,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600094387] [2023-04-02 06:26:12,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600094387] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:26:12,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:26:12,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:26:12,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932768422] [2023-04-02 06:26:12,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:26:12,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:26:12,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:26:12,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:26:12,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:26:12,823 INFO L87 Difference]: Start difference. First operand 312 states and 463 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:26:13,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:26:13,150 INFO L93 Difference]: Finished difference Result 812 states and 1225 transitions. [2023-04-02 06:26:13,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:26:13,151 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2023-04-02 06:26:13,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:26:13,154 INFO L225 Difference]: With dead ends: 812 [2023-04-02 06:26:13,155 INFO L226 Difference]: Without dead ends: 530 [2023-04-02 06:26:13,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:26:13,164 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 54 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 06:26:13,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 224 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 06:26:13,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2023-04-02 06:26:13,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 528. [2023-04-02 06:26:13,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 524 states have (on average 1.4885496183206106) internal successors, (780), 524 states have internal predecessors, (780), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:26:13,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 783 transitions. [2023-04-02 06:26:13,225 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 783 transitions. Word has length 54 [2023-04-02 06:26:13,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:26:13,225 INFO L495 AbstractCegarLoop]: Abstraction has 528 states and 783 transitions. [2023-04-02 06:26:13,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:26:13,226 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 783 transitions. [2023-04-02 06:26:13,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-02 06:26:13,226 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:26:13,226 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:26:13,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-02 06:26:13,227 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:26:13,227 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:26:13,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1165514278, now seen corresponding path program 1 times [2023-04-02 06:26:13,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:26:13,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102067461] [2023-04-02 06:26:13,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:26:13,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:26:13,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:26:13,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:26:13,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:26:13,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:26:13,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:26:13,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102067461] [2023-04-02 06:26:13,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102067461] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:26:13,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:26:13,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 06:26:13,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047730703] [2023-04-02 06:26:13,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:26:13,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 06:26:13,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:26:13,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 06:26:13,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-02 06:26:13,441 INFO L87 Difference]: Start difference. First operand 528 states and 783 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:26:14,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:26:14,281 INFO L93 Difference]: Finished difference Result 4512 states and 6807 transitions. [2023-04-02 06:26:14,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-02 06:26:14,282 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2023-04-02 06:26:14,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:26:14,299 INFO L225 Difference]: With dead ends: 4512 [2023-04-02 06:26:14,300 INFO L226 Difference]: Without dead ends: 4014 [2023-04-02 06:26:14,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2023-04-02 06:26:14,303 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 736 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 736 SdHoareTripleChecker+Valid, 770 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 06:26:14,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [736 Valid, 770 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 06:26:14,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4014 states. [2023-04-02 06:26:14,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4014 to 1024. [2023-04-02 06:26:14,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1024 states, 1020 states have (on average 1.4862745098039216) internal successors, (1516), 1020 states have internal predecessors, (1516), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:26:14,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 1519 transitions. [2023-04-02 06:26:14,470 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 1519 transitions. Word has length 55 [2023-04-02 06:26:14,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:26:14,471 INFO L495 AbstractCegarLoop]: Abstraction has 1024 states and 1519 transitions. [2023-04-02 06:26:14,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:26:14,471 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 1519 transitions. [2023-04-02 06:26:14,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-02 06:26:14,476 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:26:14,476 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:26:14,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-02 06:26:14,476 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:26:14,477 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:26:14,477 INFO L85 PathProgramCache]: Analyzing trace with hash 34050389, now seen corresponding path program 1 times [2023-04-02 06:26:14,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:26:14,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384761243] [2023-04-02 06:26:14,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:26:14,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:26:14,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:26:14,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:26:14,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:26:14,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:26:14,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:26:14,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384761243] [2023-04-02 06:26:14,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384761243] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:26:14,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:26:14,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:26:14,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521018875] [2023-04-02 06:26:14,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:26:14,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:26:14,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:26:14,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:26:14,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:26:14,648 INFO L87 Difference]: Start difference. First operand 1024 states and 1519 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:26:15,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:26:15,081 INFO L93 Difference]: Finished difference Result 2510 states and 3747 transitions. [2023-04-02 06:26:15,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:26:15,082 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2023-04-02 06:26:15,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:26:15,089 INFO L225 Difference]: With dead ends: 2510 [2023-04-02 06:26:15,089 INFO L226 Difference]: Without dead ends: 1516 [2023-04-02 06:26:15,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:26:15,092 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 48 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 06:26:15,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 200 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 06:26:15,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1516 states. [2023-04-02 06:26:15,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1516 to 1514. [2023-04-02 06:26:15,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1514 states, 1510 states have (on average 1.4821192052980132) internal successors, (2238), 1510 states have internal predecessors, (2238), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:26:15,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1514 states to 1514 states and 2241 transitions. [2023-04-02 06:26:15,286 INFO L78 Accepts]: Start accepts. Automaton has 1514 states and 2241 transitions. Word has length 57 [2023-04-02 06:26:15,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:26:15,286 INFO L495 AbstractCegarLoop]: Abstraction has 1514 states and 2241 transitions. [2023-04-02 06:26:15,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:26:15,286 INFO L276 IsEmpty]: Start isEmpty. Operand 1514 states and 2241 transitions. [2023-04-02 06:26:15,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-02 06:26:15,288 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:26:15,288 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:26:15,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-02 06:26:15,288 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:26:15,288 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:26:15,289 INFO L85 PathProgramCache]: Analyzing trace with hash 54099732, now seen corresponding path program 1 times [2023-04-02 06:26:15,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:26:15,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945926747] [2023-04-02 06:26:15,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:26:15,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:26:15,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:26:15,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:26:15,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:26:15,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:26:15,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:26:15,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945926747] [2023-04-02 06:26:15,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945926747] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:26:15,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:26:15,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 06:26:15,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758447892] [2023-04-02 06:26:15,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:26:15,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 06:26:15,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:26:15,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 06:26:15,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-02 06:26:15,651 INFO L87 Difference]: Start difference. First operand 1514 states and 2241 transitions. Second operand has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 6 states have internal predecessors, (54), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:26:16,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:26:16,169 INFO L93 Difference]: Finished difference Result 2998 states and 4451 transitions. [2023-04-02 06:26:16,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 06:26:16,169 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 6 states have internal predecessors, (54), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2023-04-02 06:26:16,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:26:16,175 INFO L225 Difference]: With dead ends: 2998 [2023-04-02 06:26:16,175 INFO L226 Difference]: Without dead ends: 1516 [2023-04-02 06:26:16,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2023-04-02 06:26:16,178 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 158 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 06:26:16,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 325 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 06:26:16,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1516 states. [2023-04-02 06:26:16,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1516 to 1514. [2023-04-02 06:26:16,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1514 states, 1510 states have (on average 1.466225165562914) internal successors, (2214), 1510 states have internal predecessors, (2214), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:26:16,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1514 states to 1514 states and 2217 transitions. [2023-04-02 06:26:16,366 INFO L78 Accepts]: Start accepts. Automaton has 1514 states and 2217 transitions. Word has length 57 [2023-04-02 06:26:16,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:26:16,367 INFO L495 AbstractCegarLoop]: Abstraction has 1514 states and 2217 transitions. [2023-04-02 06:26:16,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 6 states have internal predecessors, (54), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:26:16,367 INFO L276 IsEmpty]: Start isEmpty. Operand 1514 states and 2217 transitions. [2023-04-02 06:26:16,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-02 06:26:16,368 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:26:16,368 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:26:16,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-02 06:26:16,369 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:26:16,369 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:26:16,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1675182308, now seen corresponding path program 1 times [2023-04-02 06:26:16,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:26:16,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290787608] [2023-04-02 06:26:16,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:26:16,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:26:16,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:26:16,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:26:16,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:26:16,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:26:16,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:26:16,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290787608] [2023-04-02 06:26:16,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290787608] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:26:16,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:26:16,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 06:26:16,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940085709] [2023-04-02 06:26:16,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:26:16,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:26:16,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:26:16,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:26:16,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:26:16,603 INFO L87 Difference]: Start difference. First operand 1514 states and 2217 transitions. Second operand has 6 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:26:17,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:26:17,247 INFO L93 Difference]: Finished difference Result 3990 states and 5875 transitions. [2023-04-02 06:26:17,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:26:17,247 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2023-04-02 06:26:17,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:26:17,255 INFO L225 Difference]: With dead ends: 3990 [2023-04-02 06:26:17,255 INFO L226 Difference]: Without dead ends: 2508 [2023-04-02 06:26:17,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-04-02 06:26:17,261 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 419 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 06:26:17,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [419 Valid, 109 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 06:26:17,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2508 states. [2023-04-02 06:26:17,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2508 to 2506. [2023-04-02 06:26:17,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2506 states, 2502 states have (on average 1.460431654676259) internal successors, (3654), 2502 states have internal predecessors, (3654), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:26:17,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2506 states to 2506 states and 3657 transitions. [2023-04-02 06:26:17,608 INFO L78 Accepts]: Start accepts. Automaton has 2506 states and 3657 transitions. Word has length 58 [2023-04-02 06:26:17,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:26:17,608 INFO L495 AbstractCegarLoop]: Abstraction has 2506 states and 3657 transitions. [2023-04-02 06:26:17,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:26:17,608 INFO L276 IsEmpty]: Start isEmpty. Operand 2506 states and 3657 transitions. [2023-04-02 06:26:17,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-02 06:26:17,609 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:26:17,609 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:26:17,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-02 06:26:17,609 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:26:17,610 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:26:17,610 INFO L85 PathProgramCache]: Analyzing trace with hash 912318601, now seen corresponding path program 1 times [2023-04-02 06:26:17,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:26:17,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139957860] [2023-04-02 06:26:17,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:26:17,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:26:17,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:26:17,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:26:17,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:26:17,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:26:17,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:26:17,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139957860] [2023-04-02 06:26:17,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139957860] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:26:17,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:26:17,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 06:26:17,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521059605] [2023-04-02 06:26:17,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:26:17,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:26:17,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:26:17,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:26:17,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:26:17,834 INFO L87 Difference]: Start difference. First operand 2506 states and 3657 transitions. Second operand has 6 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:26:18,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:26:18,476 INFO L93 Difference]: Finished difference Result 4980 states and 7282 transitions. [2023-04-02 06:26:18,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:26:18,477 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2023-04-02 06:26:18,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:26:18,485 INFO L225 Difference]: With dead ends: 4980 [2023-04-02 06:26:18,485 INFO L226 Difference]: Without dead ends: 2506 [2023-04-02 06:26:18,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-04-02 06:26:18,491 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 255 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 06:26:18,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 78 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 06:26:18,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2506 states. [2023-04-02 06:26:18,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2506 to 2506. [2023-04-02 06:26:18,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2506 states, 2502 states have (on average 1.4444444444444444) internal successors, (3614), 2502 states have internal predecessors, (3614), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:26:18,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2506 states to 2506 states and 3617 transitions. [2023-04-02 06:26:18,852 INFO L78 Accepts]: Start accepts. Automaton has 2506 states and 3617 transitions. Word has length 58 [2023-04-02 06:26:18,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:26:18,853 INFO L495 AbstractCegarLoop]: Abstraction has 2506 states and 3617 transitions. [2023-04-02 06:26:18,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:26:18,853 INFO L276 IsEmpty]: Start isEmpty. Operand 2506 states and 3617 transitions. [2023-04-02 06:26:18,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-02 06:26:18,853 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:26:18,853 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:26:18,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-02 06:26:18,854 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:26:18,854 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:26:18,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1040403908, now seen corresponding path program 1 times [2023-04-02 06:26:18,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:26:18,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051564102] [2023-04-02 06:26:18,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:26:18,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:26:18,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:26:19,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:26:19,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:26:19,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:26:19,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:26:19,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051564102] [2023-04-02 06:26:19,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051564102] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:26:19,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:26:19,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 06:26:19,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818051533] [2023-04-02 06:26:19,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:26:19,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:26:19,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:26:19,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:26:19,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:26:19,057 INFO L87 Difference]: Start difference. First operand 2506 states and 3617 transitions. Second operand has 6 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:26:19,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:26:19,669 INFO L93 Difference]: Finished difference Result 4980 states and 7202 transitions. [2023-04-02 06:26:19,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:26:19,670 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2023-04-02 06:26:19,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:26:19,678 INFO L225 Difference]: With dead ends: 4980 [2023-04-02 06:26:19,678 INFO L226 Difference]: Without dead ends: 2506 [2023-04-02 06:26:19,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-04-02 06:26:19,683 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 226 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 06:26:19,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 94 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 06:26:19,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2506 states. [2023-04-02 06:26:20,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2506 to 2506. [2023-04-02 06:26:20,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2506 states, 2502 states have (on average 1.4284572342126298) internal successors, (3574), 2502 states have internal predecessors, (3574), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:26:20,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2506 states to 2506 states and 3577 transitions. [2023-04-02 06:26:20,021 INFO L78 Accepts]: Start accepts. Automaton has 2506 states and 3577 transitions. Word has length 58 [2023-04-02 06:26:20,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:26:20,021 INFO L495 AbstractCegarLoop]: Abstraction has 2506 states and 3577 transitions. [2023-04-02 06:26:20,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:26:20,022 INFO L276 IsEmpty]: Start isEmpty. Operand 2506 states and 3577 transitions. [2023-04-02 06:26:20,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-02 06:26:20,022 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:26:20,022 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:26:20,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-02 06:26:20,023 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:26:20,023 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:26:20,023 INFO L85 PathProgramCache]: Analyzing trace with hash 511113407, now seen corresponding path program 1 times [2023-04-02 06:26:20,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:26:20,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463159175] [2023-04-02 06:26:20,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:26:20,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:26:20,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:26:20,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:26:20,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:26:20,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:26:20,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:26:20,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463159175] [2023-04-02 06:26:20,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463159175] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:26:20,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:26:20,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 06:26:20,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006416726] [2023-04-02 06:26:20,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:26:20,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:26:20,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:26:20,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:26:20,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:26:20,323 INFO L87 Difference]: Start difference. First operand 2506 states and 3577 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:26:21,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:26:21,183 INFO L93 Difference]: Finished difference Result 3772 states and 5360 transitions. [2023-04-02 06:26:21,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:26:21,184 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2023-04-02 06:26:21,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:26:21,198 INFO L225 Difference]: With dead ends: 3772 [2023-04-02 06:26:21,198 INFO L226 Difference]: Without dead ends: 3770 [2023-04-02 06:26:21,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-04-02 06:26:21,200 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 135 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 06:26:21,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 466 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 06:26:21,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3770 states. [2023-04-02 06:26:21,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3770 to 2570. [2023-04-02 06:26:21,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2570 states, 2566 states have (on average 1.402182385035074) internal successors, (3598), 2566 states have internal predecessors, (3598), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:26:21,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2570 states to 2570 states and 3601 transitions. [2023-04-02 06:26:21,612 INFO L78 Accepts]: Start accepts. Automaton has 2570 states and 3601 transitions. Word has length 58 [2023-04-02 06:26:21,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:26:21,612 INFO L495 AbstractCegarLoop]: Abstraction has 2570 states and 3601 transitions. [2023-04-02 06:26:21,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:26:21,612 INFO L276 IsEmpty]: Start isEmpty. Operand 2570 states and 3601 transitions. [2023-04-02 06:26:21,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-04-02 06:26:21,618 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:26:21,618 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:26:21,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-02 06:26:21,619 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:26:21,619 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:26:21,619 INFO L85 PathProgramCache]: Analyzing trace with hash -710659794, now seen corresponding path program 1 times [2023-04-02 06:26:21,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:26:21,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279355019] [2023-04-02 06:26:21,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:26:21,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:26:21,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:26:21,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:26:21,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:26:21,858 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 06:26:21,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:26:21,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279355019] [2023-04-02 06:26:21,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279355019] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:26:21,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:26:21,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 06:26:21,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294754472] [2023-04-02 06:26:21,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:26:21,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 06:26:21,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:26:21,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 06:26:21,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-04-02 06:26:21,860 INFO L87 Difference]: Start difference. First operand 2570 states and 3601 transitions. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 6 states have internal predecessors, (74), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:26:23,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:26:23,661 INFO L93 Difference]: Finished difference Result 13474 states and 18901 transitions. [2023-04-02 06:26:23,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 06:26:23,662 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 6 states have internal predecessors, (74), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2023-04-02 06:26:23,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:26:23,698 INFO L225 Difference]: With dead ends: 13474 [2023-04-02 06:26:23,698 INFO L226 Difference]: Without dead ends: 10936 [2023-04-02 06:26:23,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-04-02 06:26:23,707 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 448 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 06:26:23,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [448 Valid, 543 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 06:26:23,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10936 states. [2023-04-02 06:26:24,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10936 to 5106. [2023-04-02 06:26:24,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5106 states, 5102 states have (on average 1.3967071736573893) internal successors, (7126), 5102 states have internal predecessors, (7126), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:26:24,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5106 states to 5106 states and 7129 transitions. [2023-04-02 06:26:24,560 INFO L78 Accepts]: Start accepts. Automaton has 5106 states and 7129 transitions. Word has length 80 [2023-04-02 06:26:24,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:26:24,560 INFO L495 AbstractCegarLoop]: Abstraction has 5106 states and 7129 transitions. [2023-04-02 06:26:24,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 6 states have internal predecessors, (74), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:26:24,561 INFO L276 IsEmpty]: Start isEmpty. Operand 5106 states and 7129 transitions. [2023-04-02 06:26:24,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-04-02 06:26:24,562 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:26:24,563 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:26:24,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-02 06:26:24,563 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:26:24,563 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:26:24,563 INFO L85 PathProgramCache]: Analyzing trace with hash -686914572, now seen corresponding path program 1 times [2023-04-02 06:26:24,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:26:24,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407911220] [2023-04-02 06:26:24,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:26:24,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:26:24,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:26:24,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:26:24,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:26:24,779 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-02 06:26:24,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:26:24,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407911220] [2023-04-02 06:26:24,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407911220] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:26:24,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:26:24,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 06:26:24,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330930776] [2023-04-02 06:26:24,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:26:24,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 06:26:24,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:26:24,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 06:26:24,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-04-02 06:26:24,781 INFO L87 Difference]: Start difference. First operand 5106 states and 7129 transitions. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 6 states have internal predecessors, (73), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:26:27,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:26:27,018 INFO L93 Difference]: Finished difference Result 16010 states and 22429 transitions. [2023-04-02 06:26:27,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 06:26:27,018 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 6 states have internal predecessors, (73), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2023-04-02 06:26:27,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:26:27,051 INFO L225 Difference]: With dead ends: 16010 [2023-04-02 06:26:27,052 INFO L226 Difference]: Without dead ends: 13472 [2023-04-02 06:26:27,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-04-02 06:26:27,061 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 441 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 06:26:27,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [441 Valid, 552 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 06:26:27,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13472 states. [2023-04-02 06:26:28,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13472 to 8882. [2023-04-02 06:26:28,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8882 states, 8878 states have (on average 1.3910790718630321) internal successors, (12350), 8878 states have internal predecessors, (12350), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:26:28,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8882 states to 8882 states and 12353 transitions. [2023-04-02 06:26:28,304 INFO L78 Accepts]: Start accepts. Automaton has 8882 states and 12353 transitions. Word has length 80 [2023-04-02 06:26:28,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:26:28,304 INFO L495 AbstractCegarLoop]: Abstraction has 8882 states and 12353 transitions. [2023-04-02 06:26:28,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 6 states have internal predecessors, (73), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:26:28,305 INFO L276 IsEmpty]: Start isEmpty. Operand 8882 states and 12353 transitions. [2023-04-02 06:26:28,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-04-02 06:26:28,307 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:26:28,307 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:26:28,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-02 06:26:28,307 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:26:28,307 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:26:28,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1083185688, now seen corresponding path program 1 times [2023-04-02 06:26:28,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:26:28,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353776409] [2023-04-02 06:26:28,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:26:28,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:26:28,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:26:28,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:26:28,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:26:28,527 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 06:26:28,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:26:28,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353776409] [2023-04-02 06:26:28,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353776409] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:26:28,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:26:28,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 06:26:28,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060457232] [2023-04-02 06:26:28,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:26:28,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 06:26:28,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:26:28,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 06:26:28,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-04-02 06:26:28,529 INFO L87 Difference]: Start difference. First operand 8882 states and 12353 transitions. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 6 states have internal predecessors, (75), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:26:30,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:26:30,932 INFO L93 Difference]: Finished difference Result 18546 states and 25957 transitions. [2023-04-02 06:26:30,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 06:26:30,932 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 6 states have internal predecessors, (75), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2023-04-02 06:26:30,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:26:30,969 INFO L225 Difference]: With dead ends: 18546 [2023-04-02 06:26:30,969 INFO L226 Difference]: Without dead ends: 16008 [2023-04-02 06:26:30,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-04-02 06:26:30,977 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 411 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 06:26:30,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [411 Valid, 621 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 06:26:30,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16008 states. [2023-04-02 06:26:32,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16008 to 11418. [2023-04-02 06:26:32,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11418 states, 11414 states have (on average 1.3910986507797443) internal successors, (15878), 11414 states have internal predecessors, (15878), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:26:32,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11418 states to 11418 states and 15881 transitions. [2023-04-02 06:26:32,531 INFO L78 Accepts]: Start accepts. Automaton has 11418 states and 15881 transitions. Word has length 80 [2023-04-02 06:26:32,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:26:32,531 INFO L495 AbstractCegarLoop]: Abstraction has 11418 states and 15881 transitions. [2023-04-02 06:26:32,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 6 states have internal predecessors, (75), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:26:32,532 INFO L276 IsEmpty]: Start isEmpty. Operand 11418 states and 15881 transitions. [2023-04-02 06:26:32,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-04-02 06:26:32,534 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:26:32,534 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:26:32,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-02 06:26:32,535 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:26:32,535 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:26:32,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1299423778, now seen corresponding path program 1 times [2023-04-02 06:26:32,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:26:32,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979864975] [2023-04-02 06:26:32,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:26:32,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:26:32,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:26:32,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:26:32,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:26:32,794 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 06:26:32,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:26:32,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979864975] [2023-04-02 06:26:32,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979864975] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:26:32,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:26:32,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 06:26:32,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367530302] [2023-04-02 06:26:32,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:26:32,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 06:26:32,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:26:32,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 06:26:32,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-04-02 06:26:32,795 INFO L87 Difference]: Start difference. First operand 11418 states and 15881 transitions. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 6 states have internal predecessors, (76), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:26:35,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:26:35,684 INFO L93 Difference]: Finished difference Result 20106 states and 28141 transitions. [2023-04-02 06:26:35,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 06:26:35,685 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 6 states have internal predecessors, (76), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2023-04-02 06:26:35,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:26:35,724 INFO L225 Difference]: With dead ends: 20106 [2023-04-02 06:26:35,724 INFO L226 Difference]: Without dead ends: 18056 [2023-04-02 06:26:35,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-04-02 06:26:35,736 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 407 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 06:26:35,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [407 Valid, 586 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 06:26:35,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18056 states. [2023-04-02 06:26:37,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18056 to 13466. [2023-04-02 06:26:37,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13466 states, 13462 states have (on average 1.3922151240528897) internal successors, (18742), 13462 states have internal predecessors, (18742), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:26:37,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13466 states to 13466 states and 18745 transitions. [2023-04-02 06:26:37,952 INFO L78 Accepts]: Start accepts. Automaton has 13466 states and 18745 transitions. Word has length 80 [2023-04-02 06:26:37,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:26:37,952 INFO L495 AbstractCegarLoop]: Abstraction has 13466 states and 18745 transitions. [2023-04-02 06:26:37,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 6 states have internal predecessors, (76), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:26:37,953 INFO L276 IsEmpty]: Start isEmpty. Operand 13466 states and 18745 transitions. [2023-04-02 06:26:37,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-04-02 06:26:37,962 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:26:37,962 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:26:37,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-04-02 06:26:37,963 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:26:37,963 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:26:37,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1148171839, now seen corresponding path program 1 times [2023-04-02 06:26:37,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:26:37,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660397807] [2023-04-02 06:26:37,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:26:37,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:26:38,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:26:38,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:26:38,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:26:38,362 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:26:38,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:26:38,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660397807] [2023-04-02 06:26:38,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660397807] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 06:26:38,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527025961] [2023-04-02 06:26:38,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:26:38,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 06:26:38,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 06:26:38,367 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) [2023-04-02 06:26:38,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 06:26:38,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:26:38,542 INFO L262 TraceCheckSpWp]: Trace formula consists of 638 conjuncts, 16 conjunts are in the unsatisfiable core [2023-04-02 06:26:38,549 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 06:26:39,154 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:26:39,154 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 06:26:39,776 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:26:39,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527025961] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 06:26:39,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 06:26:39,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2023-04-02 06:26:39,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175708892] [2023-04-02 06:26:39,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 06:26:39,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-04-02 06:26:39,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:26:39,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-04-02 06:26:39,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2023-04-02 06:26:39,779 INFO L87 Difference]: Start difference. First operand 13466 states and 18745 transitions. Second operand has 24 states, 24 states have (on average 7.625) internal successors, (183), 22 states have internal predecessors, (183), 4 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 06:26:52,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:26:52,183 INFO L93 Difference]: Finished difference Result 73542 states and 100983 transitions. [2023-04-02 06:26:52,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-04-02 06:26:52,185 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 7.625) internal successors, (183), 22 states have internal predecessors, (183), 4 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 82 [2023-04-02 06:26:52,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:26:52,337 INFO L225 Difference]: With dead ends: 73542 [2023-04-02 06:26:52,337 INFO L226 Difference]: Without dead ends: 62308 [2023-04-02 06:26:52,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=723, Invalid=2033, Unknown=0, NotChecked=0, Total=2756 [2023-04-02 06:26:52,379 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 906 mSDsluCounter, 980 mSDsCounter, 0 mSdLazyCounter, 1298 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 906 SdHoareTripleChecker+Valid, 1097 SdHoareTripleChecker+Invalid, 1319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-02 06:26:52,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [906 Valid, 1097 Invalid, 1319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1298 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-02 06:26:52,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62308 states. [2023-04-02 06:26:58,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62308 to 28290. [2023-04-02 06:26:58,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28290 states, 28286 states have (on average 1.3852082302198967) internal successors, (39182), 28286 states have internal predecessors, (39182), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:26:58,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28290 states to 28290 states and 39185 transitions. [2023-04-02 06:26:58,267 INFO L78 Accepts]: Start accepts. Automaton has 28290 states and 39185 transitions. Word has length 82 [2023-04-02 06:26:58,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:26:58,268 INFO L495 AbstractCegarLoop]: Abstraction has 28290 states and 39185 transitions. [2023-04-02 06:26:58,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 7.625) internal successors, (183), 22 states have internal predecessors, (183), 4 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 06:26:58,268 INFO L276 IsEmpty]: Start isEmpty. Operand 28290 states and 39185 transitions. [2023-04-02 06:26:58,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-04-02 06:26:58,273 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:26:58,273 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:26:58,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 06:26:58,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-04-02 06:26:58,481 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:26:58,481 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:26:58,482 INFO L85 PathProgramCache]: Analyzing trace with hash 79456109, now seen corresponding path program 1 times [2023-04-02 06:26:58,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:26:58,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856397751] [2023-04-02 06:26:58,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:26:58,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:26:58,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:26:59,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:26:59,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:26:59,071 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:26:59,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:26:59,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856397751] [2023-04-02 06:26:59,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856397751] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 06:26:59,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46015070] [2023-04-02 06:26:59,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:26:59,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 06:26:59,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 06:26:59,073 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) [2023-04-02 06:26:59,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 06:26:59,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:26:59,232 INFO L262 TraceCheckSpWp]: Trace formula consists of 638 conjuncts, 16 conjunts are in the unsatisfiable core [2023-04-02 06:26:59,235 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 06:27:00,124 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:27:00,124 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 06:27:00,936 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:27:00,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46015070] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 06:27:00,936 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 06:27:00,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 29 [2023-04-02 06:27:00,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042349520] [2023-04-02 06:27:00,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 06:27:00,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-04-02 06:27:00,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:27:00,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-04-02 06:27:00,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2023-04-02 06:27:00,938 INFO L87 Difference]: Start difference. First operand 28290 states and 39185 transitions. Second operand has 29 states, 29 states have (on average 7.413793103448276) internal successors, (215), 27 states have internal predecessors, (215), 4 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 06:27:41,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:27:41,911 INFO L93 Difference]: Finished difference Result 204914 states and 277607 transitions. [2023-04-02 06:27:41,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2023-04-02 06:27:41,911 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 7.413793103448276) internal successors, (215), 27 states have internal predecessors, (215), 4 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 82 [2023-04-02 06:27:41,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:27:42,368 INFO L225 Difference]: With dead ends: 204914 [2023-04-02 06:27:42,369 INFO L226 Difference]: Without dead ends: 176656 [2023-04-02 06:27:42,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2725 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2292, Invalid=7410, Unknown=0, NotChecked=0, Total=9702 [2023-04-02 06:27:42,470 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 2290 mSDsluCounter, 954 mSDsCounter, 0 mSdLazyCounter, 1804 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2290 SdHoareTripleChecker+Valid, 1076 SdHoareTripleChecker+Invalid, 1853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-04-02 06:27:42,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2290 Valid, 1076 Invalid, 1853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1804 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-04-02 06:27:42,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176656 states. [2023-04-02 06:27:58,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176656 to 68410. [2023-04-02 06:27:58,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68410 states, 68406 states have (on average 1.3704645791304857) internal successors, (93748), 68406 states have internal predecessors, (93748), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:27:58,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68410 states to 68410 states and 93751 transitions. [2023-04-02 06:27:58,467 INFO L78 Accepts]: Start accepts. Automaton has 68410 states and 93751 transitions. Word has length 82 [2023-04-02 06:27:58,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:27:58,467 INFO L495 AbstractCegarLoop]: Abstraction has 68410 states and 93751 transitions. [2023-04-02 06:27:58,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 7.413793103448276) internal successors, (215), 27 states have internal predecessors, (215), 4 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 06:27:58,468 INFO L276 IsEmpty]: Start isEmpty. Operand 68410 states and 93751 transitions. [2023-04-02 06:27:58,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-04-02 06:27:58,473 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:27:58,473 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:27:58,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 06:27:58,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-04-02 06:27:58,681 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:27:58,682 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:27:58,682 INFO L85 PathProgramCache]: Analyzing trace with hash 103201331, now seen corresponding path program 1 times [2023-04-02 06:27:58,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:27:58,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050663988] [2023-04-02 06:27:58,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:27:58,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:27:58,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:27:59,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:27:59,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:27:59,111 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:27:59,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:27:59,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050663988] [2023-04-02 06:27:59,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050663988] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 06:27:59,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34058299] [2023-04-02 06:27:59,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:27:59,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 06:27:59,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 06:27:59,113 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) [2023-04-02 06:27:59,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 06:27:59,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:27:59,265 INFO L262 TraceCheckSpWp]: Trace formula consists of 638 conjuncts, 17 conjunts are in the unsatisfiable core [2023-04-02 06:27:59,268 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 06:27:59,944 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:27:59,944 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 06:28:00,975 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:28:00,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34058299] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 06:28:00,975 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 06:28:00,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 31 [2023-04-02 06:28:00,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189479307] [2023-04-02 06:28:00,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 06:28:00,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-04-02 06:28:00,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:28:00,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-04-02 06:28:00,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2023-04-02 06:28:00,977 INFO L87 Difference]: Start difference. First operand 68410 states and 93751 transitions. Second operand has 31 states, 31 states have (on average 6.419354838709677) internal successors, (199), 30 states have internal predecessors, (199), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2)