/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.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 01:55:01,532 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 01:55:01,534 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 01:55:01,577 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 01:55:01,577 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 01:55:01,580 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 01:55:01,581 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 01:55:01,583 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 01:55:01,584 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 01:55:01,584 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 01:55:01,585 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 01:55:01,586 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 01:55:01,586 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 01:55:01,587 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 01:55:01,588 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 01:55:01,589 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 01:55:01,589 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 01:55:01,590 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 01:55:01,591 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 01:55:01,592 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 01:55:01,595 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 01:55:01,596 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 01:55:01,597 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 01:55:01,598 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 01:55:01,607 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 01:55:01,607 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 01:55:01,607 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 01:55:01,609 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 01:55:01,609 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 01:55:01,610 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 01:55:01,610 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 01:55:01,611 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 01:55:01,612 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 01:55:01,613 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 01:55:01,613 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 01:55:01,613 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 01:55:01,614 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 01:55:01,614 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 01:55:01,614 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 01:55:01,615 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 01:55:01,616 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 01:55:01,617 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 [2023-03-31 01:55:01,638 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 01:55:01,638 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 01:55:01,638 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 01:55:01,639 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 01:55:01,639 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 01:55:01,639 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 01:55:01,640 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-31 01:55:01,640 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-31 01:55:01,640 INFO L138 SettingsManager]: * Use SBE=true [2023-03-31 01:55:01,640 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 01:55:01,640 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 01:55:01,640 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 01:55:01,641 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 01:55:01,641 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 01:55:01,641 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 01:55:01,641 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 01:55:01,641 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 01:55:01,641 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 01:55:01,641 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 01:55:01,641 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 01:55:01,642 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 01:55:01,642 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 01:55:01,642 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-31 01:55:01,642 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 01:55:01,642 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 01:55:01,642 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 01:55:01,642 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 01:55:01,642 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 01:55:01,643 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-31 01:55:01,643 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 01:55:01,643 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-31 01:55:01,643 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 01:55:01,643 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-31 01:55:01,643 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-31 01:55:01,643 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-31 01:55:01,644 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-31 01:55:01,872 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 01:55:01,896 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 01:55:01,898 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 01:55:01,899 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 01:55:01,899 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 01:55:01,900 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-03-31 01:55:03,079 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 01:55:03,282 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 01:55:03,283 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-03-31 01:55:03,292 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b8cf4fd6/bfdf618a415f444d8856f6c6892d080a/FLAGca91c1ae1 [2023-03-31 01:55:03,303 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b8cf4fd6/bfdf618a415f444d8856f6c6892d080a [2023-03-31 01:55:03,306 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 01:55:03,307 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 01:55:03,308 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 01:55:03,308 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 01:55:03,311 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 01:55:03,311 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 01:55:03" (1/1) ... [2023-03-31 01:55:03,312 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29cfa2a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:55:03, skipping insertion in model container [2023-03-31 01:55:03,312 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 01:55:03" (1/1) ... [2023-03-31 01:55:03,318 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 01:55:03,358 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 01:55:03,515 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.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[5807,5820] [2023-03-31 01:55:03,534 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 01:55:03,548 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 01:55:03,590 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.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[5807,5820] [2023-03-31 01:55:03,605 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 01:55:03,631 INFO L208 MainTranslator]: Completed translation [2023-03-31 01:55:03,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:55:03 WrapperNode [2023-03-31 01:55:03,632 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 01:55:03,633 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 01:55:03,633 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 01:55:03,633 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 01:55:03,642 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:55:03" (1/1) ... [2023-03-31 01:55:03,642 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:55:03" (1/1) ... [2023-03-31 01:55:03,650 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:55:03" (1/1) ... [2023-03-31 01:55:03,651 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:55:03" (1/1) ... [2023-03-31 01:55:03,670 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:55:03" (1/1) ... [2023-03-31 01:55:03,678 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:55:03" (1/1) ... [2023-03-31 01:55:03,681 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:55:03" (1/1) ... [2023-03-31 01:55:03,682 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:55:03" (1/1) ... [2023-03-31 01:55:03,685 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 01:55:03,686 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 01:55:03,686 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 01:55:03,687 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 01:55:03,687 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:55:03" (1/1) ... [2023-03-31 01:55:03,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 01:55:03,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 01:55:03,713 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) [2023-03-31 01:55:03,743 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 [2023-03-31 01:55:03,759 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 01:55:03,759 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 01:55:03,762 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 01:55:03,762 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-03-31 01:55:03,762 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 01:55:03,762 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 01:55:03,762 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 01:55:03,763 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 01:55:03,763 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 01:55:03,763 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-03-31 01:55:03,763 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-03-31 01:55:03,763 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-03-31 01:55:03,763 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-03-31 01:55:03,763 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-03-31 01:55:03,763 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-03-31 01:55:03,763 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-03-31 01:55:03,763 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-03-31 01:55:03,764 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-03-31 01:55:03,764 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-03-31 01:55:03,764 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-03-31 01:55:03,764 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2023-03-31 01:55:03,764 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-03-31 01:55:03,764 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-03-31 01:55:03,764 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 01:55:03,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 01:55:03,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 01:55:03,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 01:55:03,765 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 01:55:03,765 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 01:55:03,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 01:55:03,886 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 01:55:03,887 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 01:55:04,261 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 01:55:04,268 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 01:55:04,268 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-03-31 01:55:04,270 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 01:55:04 BoogieIcfgContainer [2023-03-31 01:55:04,270 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 01:55:04,273 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 01:55:04,273 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 01:55:04,276 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 01:55:04,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 01:55:03" (1/3) ... [2023-03-31 01:55:04,276 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2edb516 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 01:55:04, skipping insertion in model container [2023-03-31 01:55:04,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:55:03" (2/3) ... [2023-03-31 01:55:04,277 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2edb516 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 01:55:04, skipping insertion in model container [2023-03-31 01:55:04,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 01:55:04" (3/3) ... [2023-03-31 01:55:04,278 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-03-31 01:55:04,306 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 01:55:04,306 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 01:55:04,375 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 01:55:04,381 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;@2d2f4480, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-31 01:55:04,381 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 01:55:04,386 INFO L276 IsEmpty]: Start isEmpty. Operand has 105 states, 98 states have (on average 1.7142857142857142) internal successors, (168), 100 states have internal predecessors, (168), 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) [2023-03-31 01:55:04,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-03-31 01:55:04,398 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:55:04,399 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, 1, 1, 1, 1, 1, 1] [2023-03-31 01:55:04,400 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:55:04,406 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:55:04,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1593691726, now seen corresponding path program 1 times [2023-03-31 01:55:04,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:55:04,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015251404] [2023-03-31 01:55:04,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:55:04,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:55:04,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:55:05,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:55:05,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:55:05,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 01:55:05,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:55:05,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015251404] [2023-03-31 01:55:05,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015251404] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:55:05,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:55:05,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 01:55:05,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534242641] [2023-03-31 01:55:05,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:55:05,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 01:55:05,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:55:05,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 01:55:05,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 01:55:05,096 INFO L87 Difference]: Start difference. First operand has 105 states, 98 states have (on average 1.7142857142857142) internal successors, (168), 100 states have internal predecessors, (168), 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 15.25) internal successors, (61), 3 states have internal predecessors, (61), 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) [2023-03-31 01:55:05,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:55:05,819 INFO L93 Difference]: Finished difference Result 231 states and 363 transitions. [2023-03-31 01:55:05,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 01:55:05,822 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 3 states have internal predecessors, (61), 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 64 [2023-03-31 01:55:05,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:55:05,835 INFO L225 Difference]: With dead ends: 231 [2023-03-31 01:55:05,835 INFO L226 Difference]: Without dead ends: 152 [2023-03-31 01:55:05,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-31 01:55:05,843 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 112 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 01:55:05,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 347 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-31 01:55:05,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2023-03-31 01:55:05,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 150. [2023-03-31 01:55:05,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 146 states have (on average 1.4383561643835616) internal successors, (210), 146 states have internal predecessors, (210), 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) [2023-03-31 01:55:05,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 213 transitions. [2023-03-31 01:55:05,925 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 213 transitions. Word has length 64 [2023-03-31 01:55:05,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:55:05,926 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 213 transitions. [2023-03-31 01:55:05,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 3 states have internal predecessors, (61), 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) [2023-03-31 01:55:05,927 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 213 transitions. [2023-03-31 01:55:05,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-03-31 01:55:05,931 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:55:05,931 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, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 01:55:05,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 01:55:05,931 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:55:05,932 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:55:05,932 INFO L85 PathProgramCache]: Analyzing trace with hash 2052026808, now seen corresponding path program 1 times [2023-03-31 01:55:05,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:55:05,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546605473] [2023-03-31 01:55:05,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:55:05,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:55:05,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:55:06,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:55:06,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:55:06,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 01:55:06,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:55:06,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546605473] [2023-03-31 01:55:06,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546605473] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:55:06,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:55:06,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 01:55:06,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092148819] [2023-03-31 01:55:06,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:55:06,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 01:55:06,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:55:06,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 01:55:06,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 01:55:06,186 INFO L87 Difference]: Start difference. First operand 150 states and 213 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 3 states have internal predecessors, (62), 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) [2023-03-31 01:55:06,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:55:06,646 INFO L93 Difference]: Finished difference Result 358 states and 537 transitions. [2023-03-31 01:55:06,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 01:55:06,647 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 3 states have internal predecessors, (62), 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 65 [2023-03-31 01:55:06,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:55:06,655 INFO L225 Difference]: With dead ends: 358 [2023-03-31 01:55:06,657 INFO L226 Difference]: Without dead ends: 246 [2023-03-31 01:55:06,658 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 [2023-03-31 01:55:06,659 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 78 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 01:55:06,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 282 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 01:55:06,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2023-03-31 01:55:06,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 244. [2023-03-31 01:55:06,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 240 states have (on average 1.4833333333333334) internal successors, (356), 240 states have internal predecessors, (356), 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) [2023-03-31 01:55:06,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 359 transitions. [2023-03-31 01:55:06,702 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 359 transitions. Word has length 65 [2023-03-31 01:55:06,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:55:06,702 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 359 transitions. [2023-03-31 01:55:06,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 3 states have internal predecessors, (62), 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) [2023-03-31 01:55:06,703 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 359 transitions. [2023-03-31 01:55:06,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-03-31 01:55:06,708 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:55:06,708 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 01:55:06,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 01:55:06,708 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:55:06,709 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:55:06,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1104350607, now seen corresponding path program 1 times [2023-03-31 01:55:06,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:55:06,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898857058] [2023-03-31 01:55:06,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:55:06,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:55:06,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:55:06,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:55:06,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:55:06,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 01:55:06,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:55:06,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898857058] [2023-03-31 01:55:06,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898857058] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:55:06,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:55:06,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 01:55:06,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654991154] [2023-03-31 01:55:06,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:55:06,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 01:55:06,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:55:06,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 01:55:06,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 01:55:06,933 INFO L87 Difference]: Start difference. First operand 244 states and 359 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 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) [2023-03-31 01:55:07,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:55:07,358 INFO L93 Difference]: Finished difference Result 624 states and 949 transitions. [2023-03-31 01:55:07,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 01:55:07,358 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 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 66 [2023-03-31 01:55:07,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:55:07,361 INFO L225 Difference]: With dead ends: 624 [2023-03-31 01:55:07,361 INFO L226 Difference]: Without dead ends: 418 [2023-03-31 01:55:07,363 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 [2023-03-31 01:55:07,364 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 73 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 01:55:07,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 278 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 01:55:07,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2023-03-31 01:55:07,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 416. [2023-03-31 01:55:07,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 412 states have (on average 1.5048543689320388) internal successors, (620), 412 states have internal predecessors, (620), 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) [2023-03-31 01:55:07,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 623 transitions. [2023-03-31 01:55:07,402 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 623 transitions. Word has length 66 [2023-03-31 01:55:07,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:55:07,402 INFO L495 AbstractCegarLoop]: Abstraction has 416 states and 623 transitions. [2023-03-31 01:55:07,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 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) [2023-03-31 01:55:07,402 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 623 transitions. [2023-03-31 01:55:07,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-03-31 01:55:07,403 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:55:07,403 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 01:55:07,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 01:55:07,404 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:55:07,404 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:55:07,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1865091830, now seen corresponding path program 1 times [2023-03-31 01:55:07,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:55:07,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859477248] [2023-03-31 01:55:07,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:55:07,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:55:07,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:55:07,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:55:07,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:55:07,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 01:55:07,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:55:07,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859477248] [2023-03-31 01:55:07,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859477248] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:55:07,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:55:07,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 01:55:07,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561932837] [2023-03-31 01:55:07,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:55:07,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 01:55:07,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:55:07,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 01:55:07,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 01:55:07,610 INFO L87 Difference]: Start difference. First operand 416 states and 623 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 3 states have internal predecessors, (64), 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) [2023-03-31 01:55:08,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:55:08,053 INFO L93 Difference]: Finished difference Result 1108 states and 1689 transitions. [2023-03-31 01:55:08,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 01:55:08,053 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 3 states have internal predecessors, (64), 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 67 [2023-03-31 01:55:08,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:55:08,057 INFO L225 Difference]: With dead ends: 1108 [2023-03-31 01:55:08,057 INFO L226 Difference]: Without dead ends: 730 [2023-03-31 01:55:08,058 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 [2023-03-31 01:55:08,059 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 68 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 01:55:08,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 274 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 01:55:08,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2023-03-31 01:55:08,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 728. [2023-03-31 01:55:08,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 728 states, 724 states have (on average 1.5082872928176796) internal successors, (1092), 724 states have internal predecessors, (1092), 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) [2023-03-31 01:55:08,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 728 states to 728 states and 1095 transitions. [2023-03-31 01:55:08,127 INFO L78 Accepts]: Start accepts. Automaton has 728 states and 1095 transitions. Word has length 67 [2023-03-31 01:55:08,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:55:08,128 INFO L495 AbstractCegarLoop]: Abstraction has 728 states and 1095 transitions. [2023-03-31 01:55:08,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 3 states have internal predecessors, (64), 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) [2023-03-31 01:55:08,128 INFO L276 IsEmpty]: Start isEmpty. Operand 728 states and 1095 transitions. [2023-03-31 01:55:08,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-03-31 01:55:08,130 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:55:08,130 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 01:55:08,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-31 01:55:08,130 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:55:08,130 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:55:08,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1815849635, now seen corresponding path program 1 times [2023-03-31 01:55:08,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:55:08,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344381079] [2023-03-31 01:55:08,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:55:08,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:55:08,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:55:08,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:55:08,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:55:08,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 01:55:08,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:55:08,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344381079] [2023-03-31 01:55:08,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344381079] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:55:08,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:55:08,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-03-31 01:55:08,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395027859] [2023-03-31 01:55:08,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:55:08,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-31 01:55:08,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:55:08,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-31 01:55:08,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-03-31 01:55:08,466 INFO L87 Difference]: Start difference. First operand 728 states and 1095 transitions. Second operand has 8 states, 8 states have (on average 8.125) internal successors, (65), 7 states have internal predecessors, (65), 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) [2023-03-31 01:55:09,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:55:09,755 INFO L93 Difference]: Finished difference Result 7628 states and 11665 transitions. [2023-03-31 01:55:09,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-03-31 01:55:09,756 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 7 states have internal predecessors, (65), 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 68 [2023-03-31 01:55:09,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:55:09,789 INFO L225 Difference]: With dead ends: 7628 [2023-03-31 01:55:09,789 INFO L226 Difference]: Without dead ends: 6938 [2023-03-31 01:55:09,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2023-03-31 01:55:09,797 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 1170 mSDsluCounter, 1623 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1170 SdHoareTripleChecker+Valid, 1751 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 01:55:09,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1170 Valid, 1751 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 01:55:09,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6938 states. [2023-03-31 01:55:10,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6938 to 1416. [2023-03-31 01:55:10,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1416 states, 1412 states have (on average 1.5099150141643058) internal successors, (2132), 1412 states have internal predecessors, (2132), 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) [2023-03-31 01:55:10,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 2135 transitions. [2023-03-31 01:55:10,085 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 2135 transitions. Word has length 68 [2023-03-31 01:55:10,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:55:10,086 INFO L495 AbstractCegarLoop]: Abstraction has 1416 states and 2135 transitions. [2023-03-31 01:55:10,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 7 states have internal predecessors, (65), 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) [2023-03-31 01:55:10,087 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 2135 transitions. [2023-03-31 01:55:10,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-03-31 01:55:10,087 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:55:10,087 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 01:55:10,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-03-31 01:55:10,088 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:55:10,088 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:55:10,089 INFO L85 PathProgramCache]: Analyzing trace with hash 381585374, now seen corresponding path program 1 times [2023-03-31 01:55:10,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:55:10,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338746865] [2023-03-31 01:55:10,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:55:10,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:55:10,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:55:10,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:55:10,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:55:10,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 01:55:10,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:55:10,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338746865] [2023-03-31 01:55:10,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338746865] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:55:10,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:55:10,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 01:55:10,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800453700] [2023-03-31 01:55:10,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:55:10,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 01:55:10,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:55:10,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 01:55:10,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 01:55:10,364 INFO L87 Difference]: Start difference. First operand 1416 states and 2135 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 3 states have internal predecessors, (67), 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) [2023-03-31 01:55:11,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:55:11,059 INFO L93 Difference]: Finished difference Result 4028 states and 6089 transitions. [2023-03-31 01:55:11,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 01:55:11,059 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 3 states have internal predecessors, (67), 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 70 [2023-03-31 01:55:11,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:55:11,070 INFO L225 Difference]: With dead ends: 4028 [2023-03-31 01:55:11,070 INFO L226 Difference]: Without dead ends: 2650 [2023-03-31 01:55:11,074 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 [2023-03-31 01:55:11,079 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 61 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 01:55:11,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 220 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 01:55:11,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2650 states. [2023-03-31 01:55:11,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2650 to 2616. [2023-03-31 01:55:11,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2616 states, 2612 states have (on average 1.4900459418070444) internal successors, (3892), 2612 states have internal predecessors, (3892), 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) [2023-03-31 01:55:11,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2616 states to 2616 states and 3895 transitions. [2023-03-31 01:55:11,433 INFO L78 Accepts]: Start accepts. Automaton has 2616 states and 3895 transitions. Word has length 70 [2023-03-31 01:55:11,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:55:11,433 INFO L495 AbstractCegarLoop]: Abstraction has 2616 states and 3895 transitions. [2023-03-31 01:55:11,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 3 states have internal predecessors, (67), 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) [2023-03-31 01:55:11,433 INFO L276 IsEmpty]: Start isEmpty. Operand 2616 states and 3895 transitions. [2023-03-31 01:55:11,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-03-31 01:55:11,434 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:55:11,434 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 01:55:11,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-03-31 01:55:11,434 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:55:11,435 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:55:11,436 INFO L85 PathProgramCache]: Analyzing trace with hash 401634717, now seen corresponding path program 1 times [2023-03-31 01:55:11,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:55:11,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254592250] [2023-03-31 01:55:11,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:55:11,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:55:11,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:55:11,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:55:11,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:55:11,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 01:55:11,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:55:11,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254592250] [2023-03-31 01:55:11,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254592250] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:55:11,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:55:11,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-03-31 01:55:11,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612891407] [2023-03-31 01:55:11,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:55:11,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-31 01:55:11,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:55:11,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-31 01:55:11,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-03-31 01:55:11,864 INFO L87 Difference]: Start difference. First operand 2616 states and 3895 transitions. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 7 states have internal predecessors, (67), 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) [2023-03-31 01:55:12,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:55:12,674 INFO L93 Difference]: Finished difference Result 5196 states and 7753 transitions. [2023-03-31 01:55:12,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-31 01:55:12,675 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 7 states have internal predecessors, (67), 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 70 [2023-03-31 01:55:12,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:55:12,685 INFO L225 Difference]: With dead ends: 5196 [2023-03-31 01:55:12,685 INFO L226 Difference]: Without dead ends: 2618 [2023-03-31 01:55:12,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2023-03-31 01:55:12,694 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 331 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 01:55:12,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 503 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 01:55:12,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2618 states. [2023-03-31 01:55:13,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2618 to 2616. [2023-03-31 01:55:13,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2616 states, 2612 states have (on average 1.4777947932618682) internal successors, (3860), 2612 states have internal predecessors, (3860), 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) [2023-03-31 01:55:13,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2616 states to 2616 states and 3863 transitions. [2023-03-31 01:55:13,076 INFO L78 Accepts]: Start accepts. Automaton has 2616 states and 3863 transitions. Word has length 70 [2023-03-31 01:55:13,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:55:13,076 INFO L495 AbstractCegarLoop]: Abstraction has 2616 states and 3863 transitions. [2023-03-31 01:55:13,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 7 states have internal predecessors, (67), 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) [2023-03-31 01:55:13,077 INFO L276 IsEmpty]: Start isEmpty. Operand 2616 states and 3863 transitions. [2023-03-31 01:55:13,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-03-31 01:55:13,077 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:55:13,078 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 01:55:13,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-03-31 01:55:13,078 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:55:13,078 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:55:13,078 INFO L85 PathProgramCache]: Analyzing trace with hash 547031724, now seen corresponding path program 1 times [2023-03-31 01:55:13,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:55:13,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221219085] [2023-03-31 01:55:13,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:55:13,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:55:13,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:55:13,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:55:13,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:55:13,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 01:55:13,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:55:13,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221219085] [2023-03-31 01:55:13,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221219085] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:55:13,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:55:13,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 01:55:13,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648952508] [2023-03-31 01:55:13,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:55:13,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 01:55:13,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:55:13,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 01:55:13,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 01:55:13,261 INFO L87 Difference]: Start difference. First operand 2616 states and 3863 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 3 states have internal predecessors, (68), 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) [2023-03-31 01:55:14,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:55:14,106 INFO L93 Difference]: Finished difference Result 5055 states and 7517 transitions. [2023-03-31 01:55:14,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 01:55:14,107 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 3 states have internal predecessors, (68), 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 71 [2023-03-31 01:55:14,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:55:14,119 INFO L225 Difference]: With dead ends: 5055 [2023-03-31 01:55:14,119 INFO L226 Difference]: Without dead ends: 3676 [2023-03-31 01:55:14,122 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 [2023-03-31 01:55:14,124 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 85 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 01:55:14,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 297 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 01:55:14,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3676 states. [2023-03-31 01:55:14,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3676 to 3674. [2023-03-31 01:55:14,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3674 states, 3670 states have (on average 1.4708446866485014) internal successors, (5398), 3670 states have internal predecessors, (5398), 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) [2023-03-31 01:55:14,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3674 states to 3674 states and 5401 transitions. [2023-03-31 01:55:14,580 INFO L78 Accepts]: Start accepts. Automaton has 3674 states and 5401 transitions. Word has length 71 [2023-03-31 01:55:14,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:55:14,581 INFO L495 AbstractCegarLoop]: Abstraction has 3674 states and 5401 transitions. [2023-03-31 01:55:14,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 3 states have internal predecessors, (68), 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) [2023-03-31 01:55:14,581 INFO L276 IsEmpty]: Start isEmpty. Operand 3674 states and 5401 transitions. [2023-03-31 01:55:14,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-03-31 01:55:14,582 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:55:14,582 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 01:55:14,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-03-31 01:55:14,582 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:55:14,583 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:55:14,583 INFO L85 PathProgramCache]: Analyzing trace with hash -436135013, now seen corresponding path program 1 times [2023-03-31 01:55:14,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:55:14,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292787784] [2023-03-31 01:55:14,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:55:14,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:55:14,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:55:14,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:55:14,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:55:14,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 01:55:14,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:55:14,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292787784] [2023-03-31 01:55:14,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292787784] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:55:14,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:55:14,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 01:55:14,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427740343] [2023-03-31 01:55:14,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:55:14,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 01:55:14,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:55:14,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 01:55:14,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-03-31 01:55:14,835 INFO L87 Difference]: Start difference. First operand 3674 states and 5401 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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) [2023-03-31 01:55:15,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:55:15,646 INFO L93 Difference]: Finished difference Result 7308 states and 10762 transitions. [2023-03-31 01:55:15,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 01:55:15,647 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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 71 [2023-03-31 01:55:15,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:55:15,660 INFO L225 Difference]: With dead ends: 7308 [2023-03-31 01:55:15,660 INFO L226 Difference]: Without dead ends: 3674 [2023-03-31 01:55:15,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-03-31 01:55:15,667 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 328 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 01:55:15,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [328 Valid, 96 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 01:55:15,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3674 states. [2023-03-31 01:55:16,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3674 to 3674. [2023-03-31 01:55:16,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3674 states, 3670 states have (on average 1.457765667574932) internal successors, (5350), 3670 states have internal predecessors, (5350), 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) [2023-03-31 01:55:16,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3674 states to 3674 states and 5353 transitions. [2023-03-31 01:55:16,175 INFO L78 Accepts]: Start accepts. Automaton has 3674 states and 5353 transitions. Word has length 71 [2023-03-31 01:55:16,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:55:16,176 INFO L495 AbstractCegarLoop]: Abstraction has 3674 states and 5353 transitions. [2023-03-31 01:55:16,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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) [2023-03-31 01:55:16,176 INFO L276 IsEmpty]: Start isEmpty. Operand 3674 states and 5353 transitions. [2023-03-31 01:55:16,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-03-31 01:55:16,176 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:55:16,177 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 01:55:16,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-03-31 01:55:16,177 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:55:16,177 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:55:16,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1198998720, now seen corresponding path program 1 times [2023-03-31 01:55:16,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:55:16,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762934505] [2023-03-31 01:55:16,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:55:16,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:55:16,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:55:16,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:55:16,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:55:16,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 01:55:16,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:55:16,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762934505] [2023-03-31 01:55:16,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762934505] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:55:16,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:55:16,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 01:55:16,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605423240] [2023-03-31 01:55:16,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:55:16,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 01:55:16,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:55:16,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 01:55:16,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-03-31 01:55:16,435 INFO L87 Difference]: Start difference. First operand 3674 states and 5353 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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) [2023-03-31 01:55:17,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:55:17,254 INFO L93 Difference]: Finished difference Result 7308 states and 10666 transitions. [2023-03-31 01:55:17,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 01:55:17,254 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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 71 [2023-03-31 01:55:17,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:55:17,267 INFO L225 Difference]: With dead ends: 7308 [2023-03-31 01:55:17,267 INFO L226 Difference]: Without dead ends: 3674 [2023-03-31 01:55:17,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-03-31 01:55:17,273 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 312 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 01:55:17,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [312 Valid, 104 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 01:55:17,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3674 states. [2023-03-31 01:55:17,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3674 to 3674. [2023-03-31 01:55:17,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3674 states, 3670 states have (on average 1.4446866485013623) internal successors, (5302), 3670 states have internal predecessors, (5302), 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) [2023-03-31 01:55:17,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3674 states to 3674 states and 5305 transitions. [2023-03-31 01:55:17,761 INFO L78 Accepts]: Start accepts. Automaton has 3674 states and 5305 transitions. Word has length 71 [2023-03-31 01:55:17,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:55:17,762 INFO L495 AbstractCegarLoop]: Abstraction has 3674 states and 5305 transitions. [2023-03-31 01:55:17,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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) [2023-03-31 01:55:17,762 INFO L276 IsEmpty]: Start isEmpty. Operand 3674 states and 5305 transitions. [2023-03-31 01:55:17,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-03-31 01:55:17,762 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:55:17,763 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 01:55:17,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-03-31 01:55:17,763 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:55:17,763 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:55:17,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1070913413, now seen corresponding path program 1 times [2023-03-31 01:55:17,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:55:17,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094004494] [2023-03-31 01:55:17,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:55:17,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:55:17,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:55:18,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:55:18,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:55:18,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 01:55:18,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:55:18,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094004494] [2023-03-31 01:55:18,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094004494] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:55:18,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:55:18,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 01:55:18,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63690917] [2023-03-31 01:55:18,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:55:18,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 01:55:18,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:55:18,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 01:55:18,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-03-31 01:55:18,033 INFO L87 Difference]: Start difference. First operand 3674 states and 5305 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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) [2023-03-31 01:55:18,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:55:18,919 INFO L93 Difference]: Finished difference Result 7308 states and 10570 transitions. [2023-03-31 01:55:18,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 01:55:18,921 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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 71 [2023-03-31 01:55:18,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:55:18,933 INFO L225 Difference]: With dead ends: 7308 [2023-03-31 01:55:18,933 INFO L226 Difference]: Without dead ends: 3674 [2023-03-31 01:55:18,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-03-31 01:55:18,939 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 283 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 01:55:18,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [283 Valid, 120 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 01:55:18,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3674 states. [2023-03-31 01:55:19,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3674 to 3674. [2023-03-31 01:55:19,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3674 states, 3670 states have (on average 1.4316076294277928) internal successors, (5254), 3670 states have internal predecessors, (5254), 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) [2023-03-31 01:55:19,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3674 states to 3674 states and 5257 transitions. [2023-03-31 01:55:19,468 INFO L78 Accepts]: Start accepts. Automaton has 3674 states and 5257 transitions. Word has length 71 [2023-03-31 01:55:19,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:55:19,468 INFO L495 AbstractCegarLoop]: Abstraction has 3674 states and 5257 transitions. [2023-03-31 01:55:19,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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) [2023-03-31 01:55:19,468 INFO L276 IsEmpty]: Start isEmpty. Operand 3674 states and 5257 transitions. [2023-03-31 01:55:19,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-03-31 01:55:19,469 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:55:19,469 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 01:55:19,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-03-31 01:55:19,469 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:55:19,470 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:55:19,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1600203914, now seen corresponding path program 1 times [2023-03-31 01:55:19,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:55:19,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391263709] [2023-03-31 01:55:19,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:55:19,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:55:19,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:55:19,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:55:19,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:55:19,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 01:55:19,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:55:19,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391263709] [2023-03-31 01:55:19,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391263709] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:55:19,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:55:19,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-31 01:55:19,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774033627] [2023-03-31 01:55:19,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:55:19,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 01:55:19,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:55:19,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 01:55:19,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-03-31 01:55:19,809 INFO L87 Difference]: Start difference. First operand 3674 states and 5257 transitions. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 5 states have internal predecessors, (68), 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) [2023-03-31 01:55:20,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:55:20,987 INFO L93 Difference]: Finished difference Result 5378 states and 7664 transitions. [2023-03-31 01:55:20,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 01:55:20,988 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 5 states have internal predecessors, (68), 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 71 [2023-03-31 01:55:20,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:55:21,008 INFO L225 Difference]: With dead ends: 5378 [2023-03-31 01:55:21,009 INFO L226 Difference]: Without dead ends: 5376 [2023-03-31 01:55:21,010 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 [2023-03-31 01:55:21,011 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 171 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 01:55:21,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 588 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 01:55:21,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5376 states. [2023-03-31 01:55:21,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5376 to 3738. [2023-03-31 01:55:21,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3738 states, 3734 states have (on average 1.4113551151580075) internal successors, (5270), 3734 states have internal predecessors, (5270), 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) [2023-03-31 01:55:21,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3738 states to 3738 states and 5273 transitions. [2023-03-31 01:55:21,609 INFO L78 Accepts]: Start accepts. Automaton has 3738 states and 5273 transitions. Word has length 71 [2023-03-31 01:55:21,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:55:21,609 INFO L495 AbstractCegarLoop]: Abstraction has 3738 states and 5273 transitions. [2023-03-31 01:55:21,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 5 states have internal predecessors, (68), 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) [2023-03-31 01:55:21,610 INFO L276 IsEmpty]: Start isEmpty. Operand 3738 states and 5273 transitions. [2023-03-31 01:55:21,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-03-31 01:55:21,625 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:55:21,625 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1] [2023-03-31 01:55:21,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-03-31 01:55:21,625 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:55:21,626 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:55:21,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1871786038, now seen corresponding path program 1 times [2023-03-31 01:55:21,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:55:21,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038964624] [2023-03-31 01:55:21,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:55:21,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:55:21,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:55:21,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:55:21,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:55:21,911 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-03-31 01:55:21,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:55:21,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038964624] [2023-03-31 01:55:21,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038964624] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:55:21,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:55:21,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-03-31 01:55:21,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581850562] [2023-03-31 01:55:21,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:55:21,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-31 01:55:21,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:55:21,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-31 01:55:21,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-03-31 01:55:21,913 INFO L87 Difference]: Start difference. First operand 3738 states and 5273 transitions. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 7 states have internal predecessors, (87), 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) [2023-03-31 01:55:24,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:55:24,886 INFO L93 Difference]: Finished difference Result 22852 states and 32278 transitions. [2023-03-31 01:55:24,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-31 01:55:24,886 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 7 states have internal predecessors, (87), 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 98 [2023-03-31 01:55:24,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:55:24,930 INFO L225 Difference]: With dead ends: 22852 [2023-03-31 01:55:24,930 INFO L226 Difference]: Without dead ends: 19154 [2023-03-31 01:55:24,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-03-31 01:55:24,943 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 899 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 899 SdHoareTripleChecker+Valid, 785 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 01:55:24,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [899 Valid, 785 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-31 01:55:24,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19154 states. [2023-03-31 01:55:26,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19154 to 7434. [2023-03-31 01:55:26,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7434 states, 7430 states have (on average 1.4069986541049797) internal successors, (10454), 7430 states have internal predecessors, (10454), 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) [2023-03-31 01:55:26,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7434 states to 7434 states and 10457 transitions. [2023-03-31 01:55:26,106 INFO L78 Accepts]: Start accepts. Automaton has 7434 states and 10457 transitions. Word has length 98 [2023-03-31 01:55:26,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:55:26,106 INFO L495 AbstractCegarLoop]: Abstraction has 7434 states and 10457 transitions. [2023-03-31 01:55:26,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 7 states have internal predecessors, (87), 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) [2023-03-31 01:55:26,107 INFO L276 IsEmpty]: Start isEmpty. Operand 7434 states and 10457 transitions. [2023-03-31 01:55:26,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-03-31 01:55:26,110 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:55:26,110 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1] [2023-03-31 01:55:26,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-03-31 01:55:26,110 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:55:26,111 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:55:26,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1848040816, now seen corresponding path program 1 times [2023-03-31 01:55:26,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:55:26,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096731237] [2023-03-31 01:55:26,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:55:26,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:55:26,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:55:26,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:55:26,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:55:26,392 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-03-31 01:55:26,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:55:26,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096731237] [2023-03-31 01:55:26,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096731237] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:55:26,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:55:26,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-03-31 01:55:26,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489196063] [2023-03-31 01:55:26,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:55:26,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-31 01:55:26,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:55:26,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-31 01:55:26,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-03-31 01:55:26,394 INFO L87 Difference]: Start difference. First operand 7434 states and 10457 transitions. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 7 states have internal predecessors, (86), 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) [2023-03-31 01:55:30,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:55:30,134 INFO L93 Difference]: Finished difference Result 26548 states and 37462 transitions. [2023-03-31 01:55:30,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-31 01:55:30,134 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 7 states have internal predecessors, (86), 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 98 [2023-03-31 01:55:30,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:55:30,184 INFO L225 Difference]: With dead ends: 26548 [2023-03-31 01:55:30,184 INFO L226 Difference]: Without dead ends: 22850 [2023-03-31 01:55:30,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-03-31 01:55:30,198 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 851 mSDsluCounter, 599 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 851 SdHoareTripleChecker+Valid, 814 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 01:55:30,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [851 Valid, 814 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-31 01:55:30,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22850 states. [2023-03-31 01:55:32,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22850 to 12954. [2023-03-31 01:55:32,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12954 states, 12950 states have (on average 1.402162162162162) internal successors, (18158), 12950 states have internal predecessors, (18158), 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) [2023-03-31 01:55:32,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12954 states to 12954 states and 18161 transitions. [2023-03-31 01:55:32,280 INFO L78 Accepts]: Start accepts. Automaton has 12954 states and 18161 transitions. Word has length 98 [2023-03-31 01:55:32,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:55:32,280 INFO L495 AbstractCegarLoop]: Abstraction has 12954 states and 18161 transitions. [2023-03-31 01:55:32,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 7 states have internal predecessors, (86), 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) [2023-03-31 01:55:32,280 INFO L276 IsEmpty]: Start isEmpty. Operand 12954 states and 18161 transitions. [2023-03-31 01:55:32,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-03-31 01:55:32,283 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:55:32,285 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1] [2023-03-31 01:55:32,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-03-31 01:55:32,285 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:55:32,285 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:55:32,285 INFO L85 PathProgramCache]: Analyzing trace with hash 2050655364, now seen corresponding path program 1 times [2023-03-31 01:55:32,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:55:32,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681678579] [2023-03-31 01:55:32,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:55:32,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:55:32,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:55:32,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:55:32,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:55:32,549 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-03-31 01:55:32,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:55:32,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681678579] [2023-03-31 01:55:32,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681678579] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:55:32,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:55:32,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-03-31 01:55:32,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466059302] [2023-03-31 01:55:32,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:55:32,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-31 01:55:32,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:55:32,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-31 01:55:32,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-03-31 01:55:32,551 INFO L87 Difference]: Start difference. First operand 12954 states and 18161 transitions. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 7 states have internal predecessors, (88), 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) [2023-03-31 01:55:36,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:55:36,942 INFO L93 Difference]: Finished difference Result 30244 states and 42646 transitions. [2023-03-31 01:55:36,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-31 01:55:36,942 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 7 states have internal predecessors, (88), 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 98 [2023-03-31 01:55:36,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:55:37,001 INFO L225 Difference]: With dead ends: 30244 [2023-03-31 01:55:37,001 INFO L226 Difference]: Without dead ends: 26546 [2023-03-31 01:55:37,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-03-31 01:55:37,019 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 750 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 750 SdHoareTripleChecker+Valid, 931 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 01:55:37,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [750 Valid, 931 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 01:55:37,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26546 states. [2023-03-31 01:55:40,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26546 to 16650. [2023-03-31 01:55:40,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16650 states, 16646 states have (on average 1.4022588009131323) internal successors, (23342), 16646 states have internal predecessors, (23342), 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) [2023-03-31 01:55:40,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16650 states to 16650 states and 23345 transitions. [2023-03-31 01:55:40,118 INFO L78 Accepts]: Start accepts. Automaton has 16650 states and 23345 transitions. Word has length 98 [2023-03-31 01:55:40,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:55:40,120 INFO L495 AbstractCegarLoop]: Abstraction has 16650 states and 23345 transitions. [2023-03-31 01:55:40,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 7 states have internal predecessors, (88), 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) [2023-03-31 01:55:40,121 INFO L276 IsEmpty]: Start isEmpty. Operand 16650 states and 23345 transitions. [2023-03-31 01:55:40,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-03-31 01:55:40,125 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:55:40,125 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1] [2023-03-31 01:55:40,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-03-31 01:55:40,125 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:55:40,126 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:55:40,126 INFO L85 PathProgramCache]: Analyzing trace with hash 138297534, now seen corresponding path program 1 times [2023-03-31 01:55:40,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:55:40,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808970549] [2023-03-31 01:55:40,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:55:40,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:55:40,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:55:40,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:55:40,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:55:40,413 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-03-31 01:55:40,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:55:40,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808970549] [2023-03-31 01:55:40,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808970549] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:55:40,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:55:40,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-03-31 01:55:40,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967000189] [2023-03-31 01:55:40,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:55:40,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-31 01:55:40,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:55:40,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-31 01:55:40,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-03-31 01:55:40,417 INFO L87 Difference]: Start difference. First operand 16650 states and 23345 transitions. Second operand has 8 states, 8 states have (on average 11.125) internal successors, (89), 7 states have internal predecessors, (89), 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) [2023-03-31 01:55:45,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:55:45,714 INFO L93 Difference]: Finished difference Result 33940 states and 47830 transitions. [2023-03-31 01:55:45,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-31 01:55:45,714 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 7 states have internal predecessors, (89), 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 98 [2023-03-31 01:55:45,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:55:45,757 INFO L225 Difference]: With dead ends: 33940 [2023-03-31 01:55:45,757 INFO L226 Difference]: Without dead ends: 30242 [2023-03-31 01:55:45,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-03-31 01:55:45,779 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 791 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 791 SdHoareTripleChecker+Valid, 932 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 01:55:45,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [791 Valid, 932 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 01:55:45,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30242 states. [2023-03-31 01:55:49,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30242 to 20346. [2023-03-31 01:55:49,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20346 states, 20342 states have (on average 1.402320322485498) internal successors, (28526), 20342 states have internal predecessors, (28526), 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) [2023-03-31 01:55:49,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20346 states to 20346 states and 28529 transitions. [2023-03-31 01:55:49,511 INFO L78 Accepts]: Start accepts. Automaton has 20346 states and 28529 transitions. Word has length 98 [2023-03-31 01:55:49,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:55:49,511 INFO L495 AbstractCegarLoop]: Abstraction has 20346 states and 28529 transitions. [2023-03-31 01:55:49,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 7 states have internal predecessors, (89), 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) [2023-03-31 01:55:49,512 INFO L276 IsEmpty]: Start isEmpty. Operand 20346 states and 28529 transitions. [2023-03-31 01:55:49,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-03-31 01:55:49,516 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:55:49,516 INFO L195 NwaCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 01:55:49,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-03-31 01:55:49,516 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:55:49,517 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:55:49,517 INFO L85 PathProgramCache]: Analyzing trace with hash -2027725308, now seen corresponding path program 1 times [2023-03-31 01:55:49,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:55:49,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084869405] [2023-03-31 01:55:49,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:55:49,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:55:49,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:55:49,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:55:49,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:55:49,794 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 01:55:49,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:55:49,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084869405] [2023-03-31 01:55:49,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084869405] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:55:49,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:55:49,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-03-31 01:55:49,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25247698] [2023-03-31 01:55:49,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:55:49,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-31 01:55:49,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:55:49,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-31 01:55:49,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-03-31 01:55:49,796 INFO L87 Difference]: Start difference. First operand 20346 states and 28529 transitions. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 7 states have internal predecessors, (95), 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) [2023-03-31 01:55:56,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:55:56,216 INFO L93 Difference]: Finished difference Result 35236 states and 49654 transitions. [2023-03-31 01:55:56,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-31 01:55:56,217 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 7 states have internal predecessors, (95), 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 99 [2023-03-31 01:55:56,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:55:56,267 INFO L225 Difference]: With dead ends: 35236 [2023-03-31 01:55:56,268 INFO L226 Difference]: Without dead ends: 32738 [2023-03-31 01:55:56,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-03-31 01:55:56,281 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 785 mSDsluCounter, 634 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 785 SdHoareTripleChecker+Valid, 848 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 01:55:56,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [785 Valid, 848 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-31 01:55:56,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32738 states.